SmartPhone by Sachin Shelke ™

How to Return value from Async task in android

2012-11-01T12:19:00.004+05:30

Hi,

After bit R&D, reach on some fatastic solution to get return data from Custom AsyncTask in your activity without using onPostExecute() Method.

Following are the steps to for our Goal.

Create your android simple project.
Write "MySampleAsyncTask.java" which extends AsyncTask class. (For example check below class)

MySampleAsyncTask.java

1:  package com.sks.asyncresultback;  
2:  import java.util.Random;  
3:  import android.os.AsyncTask;  
4:  public class MySampleAsyncTask extends AsyncTask<Void, Void, Void> {  
5:       OnAsyncResult onAsyncResult;  
6:       public void setOnResultListener(OnAsyncResult onAsyncResult) {  
7:            if (onAsyncResult != null) {  
8:                 this.onAsyncResult = onAsyncResult;  
9:            }  
10:       }  
11:       @Override  
12:       protected Void doInBackground(Void... params) {  
13:            if (onAsyncResult != null) {  
14:                 // TODO apply your business logic  
15:                 int someNumber = new Random().nextInt(999);  
16:                 if (someNumber % 2 == 0) {  
17:                      onAsyncResult.onResultSuccess(0, "Congratulations\nYou Got Success Value");  
18:                 } else {  
19:                      onAsyncResult.onResultFail(1, "Ohhhhhhhhhhh\n Your Result failed");  
20:                 }  
21:            }  
22:            return null;  
23:       }  
24:       public interface OnAsyncResult {  
25:            public abstract void onResultSuccess(int resultCode, String message);  
26:            public abstract void onResultFail(int resultCode, String errorMessage);  
27:       }  
28:  }

Look into class

At the bottom of code created a new Interface to code.

public interface OnAsyncResult {  
            public abstract void onResultSuccess(int resultCode, String message);  
            public abstract void onResultFail(int resultCode, String errorMessage);  
       }

You are free to use this listener. Here I didn't use onPostExecute() Method. so you can use your business logic as per your way.

Now lets Create your "MainActivity.java" from which we are calling our MySampleAsyncTask for our purpose.

1:  public class MainActivity extends Activity {  
2:       public TextView textView;  
3:       MySampleAsyncTask asyncTask;  
4:       @Override  
5:       public void onCreate(Bundle savedInstanceState) {  
6:            super.onCreate(savedInstanceState);  
7:            setContentView(R.layout.activity_main);  
8:            textView = (TextView) findViewById(R.id.tv_Result);  
9:            findViewById(R.id.btn_clickMe).setOnClickListener(new OnClickListener() {  
10:                 @Override  
11:                 public void onClick(View v) {  
12:                      asyncTask = new MySampleAsyncTask();  
13:                      asyncTask.setOnResultListener(asynResult);  
14:                      asyncTask.execute();  
15:                 }  
16:            });  
17:       }  
18:       OnAsyncResult asynResult = new OnAsyncResult() {  
19:            @Override  
20:            public void onResultSuccess(final int resultCode, final String message) {  
21:                 // need to add this part in ui thread.  
22:                 // as you will then thread exception.  
23:                 runOnUiThread(new Runnable() {  
24:                      public void run() {  
25:                           textView.setText("Code : " + resultCode + "\nMessage : " + message);  
26:                      }  
27:                 });  
28:            }  
29:            @Override  
30:            public void onResultFail(final int resultCode, final String errorMessage) {  
31:                 // need to add this part in ui thread.  
32:                 // as you will then thread exception.  
33:                 runOnUiThread(new Runnable() {  
34:                      public void run() {  
35:                           textView.setText("Code : " + resultCode + "\nMessage : " + errorMessage);  
36:                      }  
37:                 });  
38:            }  
39:       };

at the last block we have create instance of OnAsynkResult listener and set to our MySampleAsyncTask object on Button Click.

18:      OnAsyncResult asynResult = new OnAsyncResult() {  
19:            @Override  
20:            public void onResultSuccess(final int resultCode, final String message) {  
21:                 // need to add this part in ui thread.  
22:                 // as you will then thread exception.  
23:                 runOnUiThread(new Runnable() {  
24:                      public void run() {  
25:                           textView.setText("Code : " + resultCode + "\nMessage : " + message);  
26:                      }  
27:                 });  
28:            }  
29:            @Override  
30:            public void onResultFail(final int resultCode, final String errorMessage) {  
31:                 // need to add this part in ui thread.  
32:                 // as you will then thread exception.  
33:                 runOnUiThread(new Runnable() {  
34:                      public void run() {  
35:                           textView.setText("Code : " + resultCode + "\nMessage : " + errorMessage);  
36:                      }  
37:                 });  
38:            }  
39:       };

on each method, if you want to set values to view then you have to use runOnUiThread methods.
as this listeners are already calling from thread.

Download Source Code

Check our Source code

svn checkout

http://smartphone-app-by-sachin-shelke.googlecode.com/svn/trunk/

Comments are always welcome.

How to find Screen Size and Density of Device in Android programatically

2012-09-10T16:03:00.000+05:30

Hi add this below code in on Create method and check your device or emulator screen configuration.

if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) {
Toast.makeText(Util.mContext, "Large Screen", Toast.LENGTH_SHORT).show();
Util.v("Screen Size : Large ");

} else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {
Toast.makeText(Util.mContext, "X Large Screen", Toast.LENGTH_SHORT).show();
Util.v("Screen Size : X Large ");

} else if ((getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {
Toast.makeText(Util.mContext, "Normal Screen", Toast.LENGTH_SHORT).show();
Util.v("Screen Size : Normal ");

}

//Determine density
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
int density = metrics.densityDpi;

if (density==DisplayMetrics.DENSITY_HIGH) {
Toast.makeText(this, "DENSITY_HIGH... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
Util.v("DENSITY_HIGH... Density is " + String.valueOf(density));
}
else if (density==DisplayMetrics.DENSITY_MEDIUM) {
Toast.makeText(this, "DENSITY_MEDIUM... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
Util.v("DENSITY_MEDIUM... Density is " + String.valueOf(density));
}
else if (density==DisplayMetrics.DENSITY_LOW) {
Toast.makeText(this, "DENSITY_LOW... Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
Util.v("DENSITY_LOW... Density is " + String.valueOf(density));
}
else {
Toast.makeText(this, "Density is neither HIGH, MEDIUM OR LOW. Density is " + String.valueOf(density), Toast.LENGTH_LONG).show();
Util.v("Density is neither HIGH, MEDIUM OR LOW... Density is " + String.valueOf(density));
}

How to resolve Conversion to Dalvik format failed with error 1

2012-07-16T21:05:00.001+05:30

Many times we faced problem of "Conversion to Dalvik format failed with error 1"

When i went through Google and found many solutions but below has solved my problem.

In Eclipse Package Explorer, Right Click on Project -> Select Properties -> Select "Java Build Path" -> and remove all the JARs from library. Then click OK. Project will show you an error.
Then as usual your try fix project property and clean project.
Then again follow the above 1st steps to add your JARs.
Now follow again 2nd step to clear and clean your project.

Hurreeee,

Your problem has been resolve. Run Project and enjoy Coding

How to find Android Unique Device ID or UDID - Part 2

2012-04-10T13:11:00.003+05:30

In the previous post
http://smartphonebysachin.blogspot.in/2011/09/how-to-find-android-unique-device-id-or.html
we had seen only how to get ANDROID_D.

Now We will see the Difference Between Android ID & Device ID of Android Phone

Android ID :

ANDROID_ID is a 64-bit number (as a hex string) that is RANDOMLY GENERATED on the device's first boot and should remain constant for the lifetime of the device.(The value may change if a factory reset is performed on the device.)

Device ID :

Returns the unique device ID, for example, the IMEI for GSM and the MEID or ESN for CDMA phones.

Here is sample Code to get UDID

public class DemoActivity extends Activity {

@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main);

  TelephonyManager tm = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);

  Log.d("ID", "Android ID: " + Secure.getString(getContentResolver(), Secure.ANDROID_ID));
Log.d("ID", "Device ID : " + tm.getDeviceId());

}
}

For getting Device ID you have to set following permission in AndroidMenifest.xml

<uses-permission android:name="android.permission.READ_PHONE_STATE"/>

For getting ANDROID_ID you don't need to set any permission.

ANDROID_ID seems a good choice for a unique device identifier.

How to create iPhone like Custom Dialog / Alert View or Box in Android

2012-04-05T15:37:00.000+05:30

Hi,

Its very interesting to create iPhone Like AlertView (Dialog Box) in Android.

Follow the steps to create iPhone Like AlertView (Dialog Box) in Android

Step 1 : Create android Project in Eclipse as shown below

Step 2 : Create New Class for Custom Dialog as given below

After creating CustomizeDialog.java write following code into it.

 package com.sks.dialog.custom;  
 import android.app.Dialog;  
 import android.content.Context;  
 import android.text.method.ScrollingMovementMethod;  
 import android.view.View;  
 import android.view.View.OnClickListener;  
 import android.view.Window;  
 import android.widget.Button;  
 import android.widget.TextView;  
 /** Class Must extends with Dialog */  
 /** Implement onClickListener to dismiss dialog when OK Button is pressed */  
 public class CustomizeDialog extends Dialog implements OnClickListener {  
     Button okButton;  
     Context mContext;  
     TextView mTitle = null;  
     TextView mMessage = null;  
     View v = null;  
     public CustomizeDialog(Context context) {  
         super(context);  
         mContext = context;  
         /** 'Window.FEATURE_NO_TITLE' - Used to hide the mTitle */  
         requestWindowFeature(Window.FEATURE_NO_TITLE);  
         /** Design the dialog in main.xml file */  
         setContentView(R.layout.main);  
         v = getWindow().getDecorView();  
         v.setBackgroundResource(android.R.color.transparent);  
         mTitle = (TextView) findViewById(R.id.dialogTitle);  
         mMessage = (TextView) findViewById(R.id.dialogMessage);  
         okButton = (Button) findViewById(R.id.OkButton);  
         okButton.setOnClickListener(this);  
     }  
     @Override  
     public void onClick(View v) {  
         /** When OK Button is clicked, dismiss the dialog */  
         if (v == okButton)  
             dismiss();  
     }  
     @Override  
     public void setTitle(CharSequence title) {  
         super.setTitle(title);  
         mTitle.setText(title);  
     }  
     @Override  
     public void setTitle(int titleId) {  
         super.setTitle(titleId);  
         mTitle.setText(mContext.getResources().getString(titleId));  
     }  
     /**  
      * Set the message text for this dialog's window.  
      *   
      * @param message  
      *      - The new message to display in the title.  
      */  
     public void setMessage(CharSequence message) {  
         mMessage.setText(message);  
         mMessage.setMovementMethod(ScrollingMovementMethod.getInstance());  
     }  
     /**  
      * Set the message text for this dialog's window. The text is retrieved from the resources with the supplied  
      * identifier.  
      *   
      * @param messageId  
      *      - the message's text resource identifier <br>  
      * @see <b>Note : if resourceID wrong application may get crash.</b><br>  
      *   Exception has not handle.  
      */  
     public void setMessage(int messageId) {  
         mMessage.setText(mContext.getResources().getString(messageId));  
         mMessage.setMovementMethod(ScrollingMovementMethod.getInstance());  
     }  
 }

Very Important part to hide dialog default background.

below code is used to set transparant background of dialog.

v = getWindow().getDecorView();

v.setBackgroundResource(android.R.color.transparent);

Step 3 : Now We have to create custom Layout for Dialog.

edit main.xml (you can select layout file name as per your specifications)

 <?xml version="1.0" encoding="utf-8"?>  
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
   android:id="@+id/LinearLayout"  
   android:layout_width="fill_parent"  
   android:layout_height="wrap_content"  
   android:layout_gravity="center"  
   android:layout_margin="0dip"  
   android:background="@drawable/alert_bg"  
   android:orientation="vertical"  
   android:paddingBottom="15dip"  
   android:paddingLeft="0dip"  
   android:paddingRight="0dip"  
   android:paddingTop="0dip" >  
   <TextView  
     android:id="@+id/dialogTitle"  
     android:layout_width="fill_parent"  
     android:layout_height="wrap_content"  
     android:layout_marginTop="20dip"  
     android:background="#00000000"  
     android:gravity="center"  
     android:text=""  
     android:textColor="#fff"  
     android:textSize="22sp"  
     android:textStyle="bold" >  
   </TextView>  
   <TextView  
     android:id="@+id/dialogMessage"  
     android:layout_width="fill_parent"  
     android:layout_height="wrap_content"  
     android:layout_below="@+id/dialogTitle"  
     android:focusable="true"  
     android:focusableInTouchMode="true"  
     android:gravity="center"  
     android:maxLines="10"  
     android:padding="10dip"  
     android:scrollbars="vertical"  
     android:text=""  
     android:textColor="#fff"  
     android:textSize="18sp" >  
   </TextView>  
   <Button  
     android:id="@+id/OkButton"  
     android:layout_width="fill_parent"  
     android:layout_height="wrap_content"  
     android:layout_below="@+id/dialogMessage"  
     android:layout_centerHorizontal="true"  
     android:layout_marginLeft="10dip"  
     android:layout_marginRight="10dip"  
     android:background="@drawable/button"  
     android:text="OK"  
     android:textColor="#FFFFFF" >  
   </Button>  
 </RelativeLayout>

Step 4 : Add 9 patch image in res->drawable folder given below. You can modify image.

alert_bg.9.png

button_bg_normal.9.png

button_bg_pressed.9

titlebg.png
Note : this image transparency is 90% that's why invisible

Step 5 : For adding Focus Effect on Dialog Button create button.xml in drawable folder as given below

 <?xml version="1.0" encoding="utf-8"?>  
 <selector xmlns:android="http://schemas.android.com/apk/res/android">  
     <item android:state_pressed="true" android:drawable="@drawable/button_bg_pressed" /> <!-- pressed -->  
     <item android:state_focused="true" android:drawable="@drawable/button_bg_pressed" /> <!-- focused -->  
     <item android:drawable="@drawable/button_bg_normal" /> <!-- default -->  
 </selector>

Step 6 : Now Come to our First Activity i.e. CustomDialogExample.java and Modify file as given Below

 package com.sks.dialog.custom;  
 import android.app.Activity;  
 import android.content.Context;  
 import android.os.Bundle;  
 import android.view.View;  
 import android.view.View.OnClickListener;  
 import android.widget.Button;  
 public class CustomDialogExample extends Activity {  
     Context context;  
     CustomizeDialog customizeDialog = null;  
     /** Called when the activity is first created. */  
     @Override  
     public void onCreate(Bundle savedInstanceState) {  
         super.onCreate(savedInstanceState);  
         /** Display Custom Dialog */  
         context = this;  
         setContentView(R.layout.home);  
         Button btn1 = (Button) findViewById(R.id.btnDialog1);  
         btn1.setOnClickListener(new OnClickListener() {  
             @Override  
             public void onClick(View v) {  
                 customizeDialog = new CustomizeDialog(context);  
                 customizeDialog.setTitle("My Title");  
                 customizeDialog.setMessage("My Custom Dialog Message from \nSmartPhoneBySachin.Blogspot.com ");  
                 customizeDialog.show();  
             }  
         });  
     }  
 }

Now you are ready to Run Project and you will get result as image below

Download Source Code and Installer Apk

Comments are always welcome.

Enjoy Customization in Android

Custom ListView With Separator and Section in Android

2012-03-02T14:37:00.001+05:30

Here we will have a very simple tutorial for Custom ListView in android with Section Header.
We will able to display final view as per below images

Steps to Create Custom List View

Open Eclipse to Create New Project.
Create New Project with package name com.sks.demo.custom_list
Add following images in reg->drawable folder

list_header_bg.9.png

Create a new List Section Header Layout (find the below item_composer_header.xml file)

 <?xml version="1.0" encoding="utf-8"?>  
 <TextView xmlns:android="http://schemas.android.com/apk/res/android"  
   android:id="@+id/list_section_header"  
   android:layout_width="fill_parent"  
   android:layout_height="wrap_content"  
   android:background="@drawable/list_header_bg"  
   android:padding="4dp"  
   android:paddingLeft="10dp"  
   android:shadowColor="#000"  
   android:shadowDx="1"  
   android:shadowDy="1"  
   android:shadowRadius="1"  
   android:text="Header"  
   android:textColor="#FFF"  
   android:textSize="16sp"  
   android:textStyle="bold"  
   android:typeface="serif" />

Create a new List Item Custom Layout (find the below item_composer.xml file)

 <?xml version="1.0" encoding="utf-8"?>  
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
   android:layout_width="fill_parent"  
   android:layout_height="fill_parent"  
   android:orientation="vertical" >  
   <include  
     android:layout_width="fill_parent"  
     android:layout_height="wrap_content"  
     layout="@layout/item_composer_header" />  
   <LinearLayout  
     android:layout_width="fill_parent"  
     android:layout_height="wrap_content"  
     android:layout_marginLeft="5dp"  
     android:layout_marginRight="5dp"  
     android:background="@drawable/custom_list_item_bg"  
     android:orientation="vertical"  
     android:paddingBottom="3dp"  
     android:paddingLeft="10dp"  
     android:paddingRight="10dp"  
     android:paddingTop="3dp" >  
     <TextView  
       android:id="@+id/list_section_title1"  
       android:layout_width="wrap_content"  
       android:layout_height="wrap_content"  
       android:text="Full Name"  
       android:textColor="@color/white"  
       android:textStyle="bold" />  
     <TextView  
       android:id="@+id/list_section_title2"  
       android:layout_width="wrap_content"  
       android:layout_height="wrap_content"  
       android:text="1500-1600"  
       android:textColor="@color/white" />  
   </LinearLayout>  
 </LinearLayout>

Now Edit your main.xml to set Custom ListView

 <?xml version="1.0" encoding="utf-8"?>  
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
   android:layout_width="fill_parent"  
   android:layout_height="fill_parent"  
   android:background="@drawable/background" >  
   <TextView  
     android:id="@+id/title"  
     android:layout_width="fill_parent"  
     android:layout_height="wrap_content"  
     android:text="State wise Cities in India" />  
   <com.sks.demo.custom_list.list.SKSCustomListView  
     android:id="@+id/list_services"  
     android:layout_width="fill_parent"  
     android:layout_height="fill_parent"  
     android:layout_below="@+id/title"  
     android:background="#00ffffff"  
     android:cacheColorHint="#00000000"  
     android:divider="@drawable/img_list_seperator"  
     android:dividerHeight="1dip"  
     android:drawingCacheQuality="high"  
     android:keepScreenOn="false" >  
   </com.sks.demo.custom_list.list.SKSCustomListView>  
 </RelativeLayout>

The Above code will be look like below image. You can set any background.

Here we are going to create our custom list view Widget.

We need to set Some Data & Composer classes for list view item

Following is the Data & Composer Class in Default Package

Code : Data.java

 package com.sks.demo.custom_list;  
 import java.util.ArrayList;  
 import java.util.Arrays;  
 import java.util.List;  
 import android.os.SystemClock;  
 import android.util.Pair;  
 public class Data {  
     public static List<Pair<String, List<Composer>>> getAllData() {  
         List<Pair<String, List<Composer>>> res = new ArrayList<Pair<String, List<Composer>>>();  
         for (int i = 0; i < 4; i++) {  
             res.add(getOneSection(i));  
         }  
         return res;  
     }  
     public static List<Composer> getFlattenedData() {  
         List<Composer> res = new ArrayList<Composer>();  
         for (int i = 0; i < 4; i++) {  
             res.addAll(getOneSection(i).second);  
         }  
         return res;  
     }  
     public static Pair<Boolean, List<Composer>> getRows(int page) {  
         List<Composer> flattenedData = getFlattenedData();  
         if (page == 1) {  
             return new Pair<Boolean, List<Composer>>(true, flattenedData.subList(0, 5));  
         } else {  
             SystemClock.sleep(2000); // simulate loading  
             return new Pair<Boolean, List<Composer>>(page * 5 < flattenedData.size(), flattenedData.subList((page) * 5,  
                     Math.min(page * 5, flattenedData.size())));  
         }  
     }  
     public static Pair<String, List<Composer>> getOneSection(int index) {  
         String[] titles =  
         {  
                 "Maharashtra",  
                 "Gujarat",  
                 "Jammu",  
                 "Punjab"  
         };  
         Composer[][] composerss =  
         {  
                 {  
                         new Composer("Amravati", "2,607,160"),  
                         new Composer("Aurangabad", "2,897,103"),  
                         new Composer("Khandala", "21,043"),  
                         new Composer("Mumbai", "11,914,398"),  
                         new Composer("Nagpur", "2,420,000"),  
                         new Composer("Pune", "4,485,000"),  
                 },  
                 {  
                         new Composer("Ahmedabad", "3,913,793"),  
                         new Composer("Surat", "3,344,135"),  
                         new Composer("Vadodara", "1,513,758"),  
                         new Composer("Rajkot", "1,395,026"),  
                         new Composer("Gandhinagar", "271,331"),  
                         new Composer("Bhavnagar", "600,594"),  
                 },  
                 {  
                         new Composer("Kathua", "550,084"),  
                         new Composer("Jammu", "1,343,756"),  
                         new Composer("Samba", "245,016"),  
                         new Composer("Udhampur", "475,068"),  
                         new Composer("Reasi", "268,441"),  
                         new Composer("Rajouri", "483,284"),  
                 },  
                 {  
                         new Composer("Amritsar", "1,183,705"),  
                         new Composer("Firozpur", "110,091"),  
                         new Composer("Ludhiana", "1,613,878"),  
                         new Composer("Chandigarh", "27,704,236"),  
                         new Composer("Jalandhar ", "873,725"),  
                         new Composer("Patiala", "445,196"),  
                 },  
         };  
         return new Pair<String, List<Composer>>(titles[index], Arrays.asList(composerss[index]));  
     }  
 }

Code : Composer.java

 package com.sks.demo.custom_list;  
 public class Composer {  
     public static final String TAG = Composer.class.getSimpleName();  
     public String name;  
     public String year;  
     public Composer(String name, String year) {  
         this.name = name;  
         this.year = year;  
     }  
 }

Now Create Custom List & Adapter

Create New Package com.sks.demo.custom_list.list
Create new class SKSCustomListAdapter.java

Write code for SKSCustomListAdapter.java

package com.sks.demo.custom_list.list; import android.view.View; import android.view.ViewGroup; import android.widget.AbsListView; import android.widget.AbsListView.OnScrollListener; import android.widget.BaseAdapter; import android.widget.SectionIndexer; public abstract class SKSCustomListAdapter extends BaseAdapter implements SectionIndexer, OnScrollListener { public static final String TAG = SKSCustomListAdapter.class.getSimpleName(); public interface HasMorePagesListener { void noMorePages(); void mayHaveMorePages(); } /** * The <em>current</em> page, not the page that is going to be loaded. */ int page = 1; int initialPage = 1; boolean automaticNextPageLoading = false; HasMorePagesListener hasMorePagesListener; void setHasMorePagesListener(HasMorePagesListener hasMorePagesListener) { this.hasMorePagesListener = hasMorePagesListener; } /** * Pinned header state: don't show the header. */ public static final int PINNED_HEADER_GONE = 0; /** * Pinned header state: show the header at the top of the list. */ public static final int PINNED_HEADER_VISIBLE = 1; /** * Pinned header state: show the header. If the header extends beyond * the bottom of the first shown element, push it up and clip. */ public static final int PINNED_HEADER_PUSHED_UP = 2; /** * Computes the desired state of the pinned header for the given * position of the first visible list item. Allowed return values are * {@link #PINNED_HEADER_GONE}, {@link #PINNED_HEADER_VISIBLE} or * {@link #PINNED_HEADER_PUSHED_UP}. */ public int getPinnedHeaderState(int position) { if (position < 0 || getCount() == 0) { return PINNED_HEADER_GONE; } // The header should get pushed up if the top item shown // is the last item in a section for a particular letter. int section = getSectionForPosition(position); int nextSectionPosition = getPositionForSection(section + 1); if (nextSectionPosition != -1 && position == nextSectionPosition - 1) { return PINNED_HEADER_PUSHED_UP; } return PINNED_HEADER_VISIBLE; } /** * Sets the initial page when {@link #resetPage()} is called. * Default is 1 (for APIs with 1-based page number). */ public void setInitialPage(int initialPage) { this.initialPage = initialPage; } /** * Resets the current page to the page specified in {@link #setInitialPage(int)}. */ public void resetPage() { this.page = this.initialPage; } /** * Increases the current page number. */ public void nextPage() { this.page++; } @Override public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) { if (view instanceof SKSCustomListView) { ((SKSCustomListView) view).configureHeaderView(firstVisibleItem); } } @Override public void onScrollStateChanged(AbsListView view, int scrollState) { // nop } @Override public final View getView(int position, View convertView, ViewGroup parent) { View res = getAmazingView(position, convertView, parent); if (position == getCount() - 1 && automaticNextPageLoading) { onNextPageRequested(page + 1); } final int section = getSectionForPosition(position); boolean displaySectionHeaders = (getPositionForSection(section) == position); bindSectionHeader(res, position, displaySectionHeaders); return res; } public void notifyNoMorePages() { automaticNextPageLoading = false; if (hasMorePagesListener != null) hasMorePagesListener.noMorePages(); } public void notifyMayHaveMorePages() { automaticNextPageLoading = true; if (hasMorePagesListener != null) hasMorePagesListener.mayHaveMorePages(); } /** * The last item on the list is requested to be seen, so do the request * and call {@link SKSCustomListView#tellNoMoreData()} if there is no more pages. * * @param page the page number to load. */ protected abstract void onNextPageRequested(int page); /** * Configure the view (a listview item) to display headers or not based on displaySectionHeader * (e.g. if displaySectionHeader header.setVisibility(VISIBLE) else header.setVisibility(GONE)). */ protected abstract void bindSectionHeader(View view, int position, boolean displaySectionHeader); /** * read: get view too */ public abstract View getAmazingView(int position, View convertView, ViewGroup parent); /** * Configures the pinned header view to match the first visible list item. * * @param header pinned header view. * @param position position of the first visible list item. * @param alpha fading of the header view, between 0 and 255. */ public abstract void configurePinnedHeader(View header, int position, int alpha); @Override public abstract int getPositionForSection(int section); @Override public abstract int getSectionForPosition(int position); @Override public abstract Object[] getSections(); }

Create new Class SKSCustomListView.java

Write code for SKSCustomListView.java

 package com.sks.demo.custom_list.list;  
 import android.content.Context;  
 import android.graphics.Canvas;  
 import android.util.AttributeSet;  
 import android.view.View;  
 import android.widget.ListAdapter;  
 import android.widget.ListView;  
 import com.sks.demo.custom_list.list.SKSCustomListAdapter.HasMorePagesListener;  
 /**  
  * A ListView that maintains a header pinned at the top of the list. The pinned  
  * header can be pushed up and dissolved as needed.  
  *   
  * It also supports pagination by setting a custom view as the loading  
  * indicator.  
  */  
 public class SKSCustomListView extends ListView implements HasMorePagesListener {  
     View listFooter;  
     boolean footerViewAttached = false;  
     private View mHeaderView;  
     private boolean mHeaderViewVisible;  
     private int mHeaderViewWidth;  
     private int mHeaderViewHeight;  
     private SKSCustomListAdapter adapter;  
     public void setPinnedHeaderView(View view) {  
         mHeaderView = view;  
         // Disable vertical fading when the pinned header is present  
         // TODO change ListView to allow separate measures for top and bottom  
         // fading edge;  
         // in this particular case we would like to disable the top, but not the  
         // bottom edge.  
         if (mHeaderView != null) {  
             setFadingEdgeLength(0);  
         }  
         requestLayout();  
     }  
     @Override  
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  
         super.onMeasure(widthMeasureSpec, heightMeasureSpec);  
         if (mHeaderView != null) {  
             measureChild(mHeaderView, widthMeasureSpec, heightMeasureSpec);  
             mHeaderViewWidth = mHeaderView.getMeasuredWidth();  
             mHeaderViewHeight = mHeaderView.getMeasuredHeight();  
         }  
     }  
     @Override  
     protected void onLayout(boolean changed, int left, int top, int right, int bottom) {  
         super.onLayout(changed, left, top, right, bottom);  
         if (mHeaderView != null) {  
             mHeaderView.layout(0, 0, mHeaderViewWidth, mHeaderViewHeight);  
             configureHeaderView(getFirstVisiblePosition());  
         }  
     }  
     public void configureHeaderView(int position) {  
         if (mHeaderView == null) {  
             return;  
         }  
         int state = adapter.getPinnedHeaderState(position);  
         switch (state) {  
         case SKSCustomListAdapter.PINNED_HEADER_GONE: {  
             mHeaderViewVisible = false;  
             break;  
         }  
         case SKSCustomListAdapter.PINNED_HEADER_VISIBLE: {  
             adapter.configurePinnedHeader(mHeaderView, position, 255);  
             if (mHeaderView.getTop() != 0) {  
                 mHeaderView.layout(0, 0, mHeaderViewWidth, mHeaderViewHeight);  
             }  
             mHeaderViewVisible = true;  
             break;  
         }  
         case SKSCustomListAdapter.PINNED_HEADER_PUSHED_UP: {  
             View firstView = getChildAt(0);  
             if (firstView != null) {  
                 int bottom = firstView.getBottom();  
                 int headerHeight = mHeaderView.getHeight();  
                 int y;  
                 int alpha;  
                 if (bottom < headerHeight) {  
                     y = (bottom - headerHeight);  
                     alpha = 255 * (headerHeight + y) / headerHeight;  
                 } else {  
                     y = 0;  
                     alpha = 255;  
                 }  
                 adapter.configurePinnedHeader(mHeaderView, position, alpha);  
                 if (mHeaderView.getTop() != y) {  
                     mHeaderView.layout(0, y, mHeaderViewWidth, mHeaderViewHeight + y);  
                 }  
                 mHeaderViewVisible = true;  
             }  
             break;  
         }  
         }  
     }  
     @Override  
     protected void dispatchDraw(Canvas canvas) {  
         super.dispatchDraw(canvas);  
         if (mHeaderViewVisible) {  
             drawChild(canvas, mHeaderView, getDrawingTime());  
         }  
     }  
     public SKSCustomListView(Context context) {  
         super(context);  
     }  
     public SKSCustomListView(Context context, AttributeSet attrs) {  
         super(context, attrs);  
     }  
     public SKSCustomListView(Context context, AttributeSet attrs, int defStyle) {  
         super(context, attrs, defStyle);  
     }  
     public void setLoadingView(View listFooter) {  
         this.listFooter = listFooter;  
     }  
     public View getLoadingView() {  
         return listFooter;  
     }  
     @Override  
     public void setAdapter(ListAdapter adapter) {  
         if (!(adapter instanceof SKSCustomListAdapter)) {  
             throw new IllegalArgumentException(SKSCustomListView.class.getSimpleName() + " must use adapter of type "  
                     + SKSCustomListAdapter.class.getSimpleName());  
         }  
         // previous adapter  
         if (this.adapter != null) {  
             this.adapter.setHasMorePagesListener(null);  
             this.setOnScrollListener(null);  
         }  
         this.adapter = (SKSCustomListAdapter) adapter;  
         ((SKSCustomListAdapter) adapter).setHasMorePagesListener(this);  
         this.setOnScrollListener((SKSCustomListAdapter) adapter);  
         View dummy = new View(getContext());  
         super.addFooterView(dummy);  
         super.setAdapter(adapter);  
         super.removeFooterView(dummy);  
     }  
     @Override  
     public SKSCustomListAdapter getAdapter() {  
         return adapter;  
     }  
     @Override  
     public void noMorePages() {  
         if (listFooter != null) {  
             this.removeFooterView(listFooter);  
         }  
         footerViewAttached = false;  
     }  
     @Override  
     public void mayHaveMorePages() {  
         if (!footerViewAttached && listFooter != null) {  
             this.addFooterView(listFooter);  
             footerViewAttached = true;  
         }  
     }  
     public boolean isLoadingViewVisible() {  
         return footerViewAttached;  
     }  
 }

Finally We reach to create our Start-up Activity named as CustomListDemoActivity.java

In main package i.e. com.sks.demo.custom_list Create new Activity CustomListDemoActivity.java

Write code for CustomListDemoActivity.java
Code : CustomListDemoActivity.java

 package com.sks.demo.custom_list;  
 import java.util.List;  
 import android.app.Activity;  
 import android.content.Context;  
 import android.os.Bundle;  
 import android.util.Log;  
 import android.util.Pair;  
 import android.view.LayoutInflater;  
 import android.view.View;  
 import android.view.ViewGroup;  
 import android.widget.AdapterView;  
 import android.widget.AdapterView.OnItemClickListener;  
 import android.widget.TextView;  
 import com.sks.demo.custom_list.list.SKSCustomListAdapter;  
 import com.sks.demo.custom_list.list.SKSCustomListView;  
 public class CustomListDemoActivity extends Activity {  
     SKSCustomListView lsComposer;  
     SectionComposerAdapter adapter;  
     Context context;  
     /** Called when the activity is first created. */  
     @Override  
     public void onCreate(Bundle savedInstanceState) {  
         super.onCreate(savedInstanceState);  
         setContentView(R.layout.main);  
         context = getParent();  
     }  
     @Override  
     protected void onStart() {  
         super.onStart();  
         initializedView();  
         setupFunctionality();  
         setupListeners();  
     }  
     private void initializedView() {  
         lsComposer = (SKSCustomListView) findViewById(R.id.list_services);  
     }  
     private void setupFunctionality() {  
         lsComposer.setPinnedHeaderView(LayoutInflater.from(this).inflate(R.layout.item_composer_header, lsComposer, false));  
         lsComposer.setAdapter(adapter = new SectionComposerAdapter());  
         lsComposer.setOnItemClickListener(new OnItemClickListener() {  
             @Override  
             public void onItemClick(AdapterView<?> parent, View view, int position, long id) {  
                 // Intent intent = new Intent(CustomListDemoActivity.this,  
                 // ServiceDestailsScreen.class);  
                 String name, address, title;  
                 title = ((TextView) view.findViewById(R.id.list_section_header)).getText().toString();  
                 name = ((TextView) view.findViewById(R.id.list_section_title1)).getText().toString();  
                 address = ((TextView) view.findViewById(R.id.list_section_title2)).getText().toString();  
                 // intent.putExtra("serviceName", title);  
                 // intent.putExtra("name", name);  
                 // intent.putExtra("address", address);  
                 Log.v(Util.TAG, "Name : " + name);  
                 Log.v(Util.TAG, "Address : " + address);  
                 Log.v(Util.TAG, "Title: " + title);  
                 // getParent().startActivity(intent);  
             }  
         });  
     }  
     private void setupListeners() {  
         // titleBack.setOnClickListener(this);  
     }  
     class SectionComposerAdapter extends SKSCustomListAdapter {  
         List<Pair<String, List<Composer>>> all = Data.getAllData();  
         @Override  
         public int getCount() {  
             int res = 0;  
             for (int i = 0; i < all.size(); i++) {  
                 res += all.get(i).second.size();  
             }  
             return res;  
         }  
         @Override  
         public Composer getItem(int position) {  
             int c = 0;  
             for (int i = 0; i < all.size(); i++) {  
                 if (position >= c && position < c + all.get(i).second.size()) {  
                     return all.get(i).second.get(position - c);  
                 }  
                 c += all.get(i).second.size();  
             }  
             return null;  
         }  
         @Override  
         public long getItemId(int position) {  
             return position;  
         }  
         @Override  
         protected void onNextPageRequested(int page) {  
         }  
         @Override  
         protected void bindSectionHeader(View view, int position, boolean displaySectionHeader) {  
             if (displaySectionHeader) {  
                 view.findViewById(R.id.list_section_header).setVisibility(View.VISIBLE);  
                 TextView lSectionTitle = (TextView) view.findViewById(R.id.list_section_header);  
                 lSectionTitle.setText(getSections()[getSectionForPosition(position)]);  
             } else {  
                 TextView lSectionTitle = (TextView) view.findViewById(R.id.list_section_header);  
                 lSectionTitle.setText(getSections()[getSectionForPosition(position)]);  
                 view.findViewById(R.id.list_section_header).setVisibility(View.GONE);  
             }  
         }  
         @Override  
         public View getAmazingView(int position, View convertView, ViewGroup parent) {  
             View res = convertView;  
             if (res == null)  
                 res = getLayoutInflater().inflate(R.layout.item_composer, null);  
             TextView lName = (TextView) res.findViewById(R.id.list_section_title1);  
             TextView lYear = (TextView) res.findViewById(R.id.list_section_title2);  
             Composer composer = getItem(position);  
             lName.setText(composer.name);  
             lYear.setText("Population : " + composer.year);  
             return res;  
         }  
         @Override  
         public void configurePinnedHeader(View header, int position, int alpha) {  
             TextView lSectionHeader = (TextView) header;  
             lSectionHeader.setText(getSections()[getSectionForPosition(position)]);  
             // lSectionHeader.setBackgroundColor(alpha << 24 | (0xbbffbb));  
             // lSectionHeader.setTextColor(alpha << 24 | (0x000000));  
         }  
         @Override  
         public int getPositionForSection(int section) {  
             if (section < 0)  
                 section = 0;  
             if (section >= all.size())  
                 section = all.size() - 1;  
             int c = 0;  
             for (int i = 0; i < all.size(); i++) {  
                 if (section == i) {  
                     return c;  
                 }  
                 c += all.get(i).second.size();  
             }  
             return 0;  
         }  
         @Override  
         public int getSectionForPosition(int position) {  
             int c = 0;  
             for (int i = 0; i < all.size(); i++) {  
                 if (position >= c && position < c + all.get(i).second.size()) {  
                     return i;  
                 }  
                 c += all.get(i).second.size();  
             }  
             return -1;  
         }  
         @Override  
         public String[] getSections() {  
             String[] res = new String[all.size()];  
             for (int i = 0; i < all.size(); i++) {  
                 res[i] = all.get(i).first;  
             }  
             return res;  
         }  
     }  
 }

Make sure the changes in AndroidMenifest.xml

Code : AndroidMenifest.xml

 <?xml version="1.0" encoding="utf-8"?>  
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"  
   package="com.sks.demo.custom_list"  
   android:versionCode="1"  
   android:versionName="1.0" >  
   <uses-sdk android:minSdkVersion="8" />  
   <application  
     android:icon="@drawable/ic_launcher"  
     android:label="@string/app_name" >  
     <activity  
       android:name=".CustomListDemoActivity"  
       android:label="@string/app_name" >  
       <intent-filter>  
         <action android:name="android.intent.action.MAIN" />  
         <category android:name="android.intent.category.LAUNCHER" />  
       </intent-filter>  
     </activity>  
   </application>  
 </manifest>

Finally Code writing work has been complete. Start compiling Android project.
Run the project.
Result will be like below

Download Source Code and Installer Apk

SVN Repository

http://smartphone-app-by-sachin-shelke.googlecode.com/svn/trunk/

Enjoy the Code and do not forget to leave comments.

Windows Phone 7 Design Guidelines – Cheat Sheet

2012-02-23T14:38:00.001+05:30

Navigation, frames and pages

Mockup the pages and navigational map of your application and walk through them several times before coding. This will minimize or eliminate the need to add pages or change the map later, when it will be much harder.
Make sure to consider the back button and user interactions with the application bar when creating your navigation map.

Application Bar

Use the application bar button for common application tasks.
You are limited to four application bar buttons.
Place less frequently performed actions in the application bar menu.
If the action is difficult to clearly convey with an icon, place it in the application bar menu instead of as a button.
You are limited to five application bar menu items to prevent scrolling.
Standard application bar icons are installed as part of the Windows Phone Developer tools. Find them at C:\Program Files\Microsoft SDKs\Windows Phone\v7.0\Icons
Custom application bar icons should be 48 x 48 pixels and use a white foreground on a transparent background. You do not need the circle in the icon, as this is drawn by the application bar.

Back button

Pressing the back button from the first screen of an application must exit the application.
Pressing the back button must return the application to the previous page.
If the current page displays a context menu or a dialog, the pressing the Back button must close the menu or dialog and cancel the backward navigation to the previous page.
You should only implement back button behaviors that navigate back or dismiss context menus or modal dialog boxes. All other implementations are prohibited.

Screen orientations

Portrait is the default application view-you must add code to support landscape view
If an application supports landscape it cannot specify only left or only right landscape views – both views must be supported.

Application icon

Application icon should be 62 x 62 pixels and PNG format.

Tiles and tile notification

Tile images should PNG format and measure 173 pixels by 173 pixels at 256 dpi
Make sure to change Build Action for images to Content when you add them to Visual Studio.

Themes

Avoid using too much white in applications, such as white backgrounds, as this may have an impact on battery life for devices that have organic LED displays.
If the foreground or background color of a control is explicitly set, verify that the content is visible in both dark and light themes. If the set color is not visible, also explicitly set the background or foreground color to maintain contrast or choose a more appropriate color.

Application settings

Application actions that overwrite or delete data, or are irreversible must have a “Cancel” button.
When using additional screens with commit and cancel buttons, clicking those buttons should perform the associated action and return the user to the main settings screen.

Touch input

All basic or common tasks should be completed using a single finger.
Touch controls should respond to touch immediately. A touch control that lags or that seems slow when transitioning will have a negative impact on the user experience.
For time consuming processes, developers should provide feedback to indicate that something is happening by using content to indicate progress, or consider using a progress bar or raw notification as a last resort. For example, show more and more of the content as it is being downloaded.
The touch and hold gesture should generally be used to display a context menu or options page for an item.

On-screen keyboard

You should set the InputScope property for a text box or other edit controls to define the keyboard type and enable the appropriate typing aides. For example, if you choose the URL input scope, a keyboard layout will be shown featuring a .com key.

Canvas/Grid for layout

Canvas uses a pixel-based layout and can provide better layout performance than the grid control for deeply embedded or nested controls in for applications that do not change orientations.
Grid control is the best choice when the application frame needs to grow, shrink, or rotate.

Panorama control/pivot considerations

Both panorama and pivot controls provide horizontal navigation through phone content, enabling the user to flick and pan as necessary.
Use panorama elements as the starting point for more detailed experiences.
Use a pivot control to filter large data sets, providing a view of multiple data sets, or to provide a way to switch between different views of the same data.
Do not use the pivot control for task-based navigation, like in a wizard application.
Use for vertical scrolling through a list or grid in panorama sections is acceptable as long as it is within the confines of the section and is not in parallel with a horizontal scroll.
Never place a pivot control inside of another pivot control.
Never place a pivot control inside of a panorama control.
Applications should minimize the number of pivot pages.
The Pivot control should only be used to display items or data of similar type.

Text guidelines

Use fonts other than Segoe sparingly
Avoid using font sizes that are smaller than 15 points in size.
Maintain consistent capitalization practices to prevent a disjointed or jagged reading experience.

The title bar application title should be all capitals.
User all lower case letters for most other application text including page titles, list titles, etc.

Enjoy Windows Phone 7 Development.

All the Best

Source : Windows MSDN

7 Mistakes Developers make when implementing Windows Phone Custom Controls

2012-01-10T15:05:00.000+05:30

Generally, Custom Controls are skinable, themable and reusable controls that once created can be used by simply loading the assembly in any project. All controls that are used in Silverlight for Windows Phone 7 (eg., Button, TextBlock, ListBox) and UserControl are also Custom Controls. Usually Custom Controls inherit from Control,ItemsControl, ContentControl, etc.

NOTE: You can also take a look at the following article for reference: Creating a WP7 Custom Control in 7 Steps

Mistake #1: Wrong choice of whether to implement a Custom Control or a UserControl

Generally when talking about Windows Phone controls you have two options: either to implement a User Control or a Custom Control.

User Control: a reusable control that combines existing controls and can implement its own logic. User-Controls can be reused but cannot be skinned or themed.	Custom Control: skinable, themable and reusable controls that once created can be used by simply loading the assembly in any project.
Good for static layout	Good for dynamic layout
Easier to create	Harder to create
Usually used to compose a set of existing controls	Usually used to create a new control
Usually used to allow reusability on a larger scale	Usually used to allow reusability on a smaller scale
Provides less flexibility	Provides greater flexibility (ex: the control template can be replaced with a completely different one)
Does not require too much knowledge of Silverlight UI model	Requires better understanding of Silverlight UI model

Example1: Correct choice of using Custom Control

Control Description: We want our control to :

contain a collection of items
expose ItemsSource
be easily reusable
allow automatic sorting, filtering,etc. based on some condition
have multiple Views/States, i.e. FullScreen mode, Minimized mode, Standard mode, etc.
allow item selection
expose custom properties
be fully customizable

Control Usage: We will use this control multiple times in our application and in several other applications.

Our Comment: In this case we would suggest that you implement a Custom Control that derives from ListBox or optionally directly from ItemsControl. The control will be compiled into a separate assembly (.dll) so that it can be easily reused in other applications as well.

Example2: Incorrect choice of using Custom Control

Control Description: We want our control to:

have ListBox which will be automatically sorting, filtering,etc based on some condition. For example Button click.
consists of a ListBox, two Buttons and a TextBlock
exposes several custom properties
not necessarily provide great flexibility in appearance customization

Control Usage: We will use this control only a couple of times in a single application.

Our Comment: In this case we would suggest that you implement a UserControl instead of Custom Control because you will use it only a couple of times in the same project and it will be easier to implement the desired functionality in code behind rather than trying to implement a Custom Control from scratch.

Mistake #2: Deriving from an inappropriate base class

When implementing a Custom Control you need to derive from an appropriate base type . Here are some suggestions:

ItemsControl: When you want to implement a control that has multiple items usually using the ItemsControl is a good choice.

ContentControl: When you want to implement a control that displays a single element (through the Content property), possibly using different templates.

ListBox: When you want to implement a selectable ItemsControl

Control: When there is no other suitable type to derive from.

Controls such as Button, CheckBox, ScrollViewer, etc.: When you want to implement a specific type of control and need some of the properties/method of the parent control.

Mistake #3: Forgetting to set DefaultStyleKey in the constructor

It is very important not to forget to set the DefaultStyleKey in the constructor of your custom control.

NOTE: DefaultStyleKey gets or sets the key that references the default style for the control.

1

2

3

4

5

6

7

public class MyCustomControl : ContentControl

{

    public MyCustomControl()

    {

        DefaultStyleKey = typeof(MyCustomControl);

    }

}

Mistake #4: Control theme(default Style) in the wrong place

This is one of the most common mistakes that we have seen. In short the base structure of a Custom Control is:

MyCustomControl.cs + Themes/generic.xaml

MyCustomControl.cs: place the C#/VB code here
Themes/generic.xaml: place the UI here

NOTE

For now in Silverlight for Windows Phone Mango there is no suitable VisualStudio Template for adding a XAML file or ResourceDictionary as a file in your project. So in order to add generic.xaml file you can create a new Class by choosing Add->NewItems->Class and rename it to generic.xaml.

NOTE: The name is important!

NOTE:It is very important that you remember to set the generic.xaml file's build action to Resource. This is necessary in order to make sure that the template is packed in the same assembly as the control otherwise the template wont be available.

Mistake #5: generic.xaml defined or used in a wrong way

Example1: Correct

Themes/generic.xaml
Build Action: Resource
ResourceDictionary without any x:Key or x:Name
include

xmlns:vsm="clr-namespace:System.Windows;assembly=System.Windows" if using any VisualStates

Example2: Incorrect

/generic.xaml
Build Action: Content
ResourceDictionary with x:Key or x:Name

Mistake #6: Wrong Style

The default style and the ControlTemplate of the custom control determine how the control will look like.

When creating the default style(theme) of a Custom Control it is very important to consider the following things:

You must define a valid ControlTemplate
Add a valid TargetType
No x:Key
No x:Name

Example1: Correct Style

<Style TargetType="local:MyCustomControl">

    <Setter Property="Template">

        <Setter.Value>

            <ControlTemplate TargetType="local:MyCustomControl">

               ..

            </ControlTemplate>

        </Setter.Value>

    </Setter>

</Style>

where local is your new Custom Control namespace for example:

1	`xmlns:local="clr-namespace:CustomControlSample"`

Example2: Incorrect Style

Here is an example of incorrectly defined Style.

Mistake #7: Using Binding instead of TemplateBinding

TemplateBinding links the value of a property in a control template to be the value of a property on the templated custom control!

Example1: Correct

Example2: Incorrect

In this article I talked about 7 common mistakes that developers make when implementing a Custom Control in Silverlight for Windows Phone.

I hope that the post was helpful.

Soap Request in android

2011-11-10T15:23:00.000+05:30

Well you need to understand what a soap request is made of:.

Code:

<?xml version="1.0"?>
<soap:Envelope xmlns:soap="http://www.w3.org/2003/05/soap-envelope">
  <soap:Header>
  </soap:Header>
  <soap:Body>
    <m:GetStockPrice xmlns:m="http://www.example.org/stock">
      <m:StockName>Google</m:StockName>
    </m:GetStockPrice>
  </soap:Body>
</soap:Envelope>

The message has a soap:envelope with a soap:header and a soap:body.

The content type of a soap requests is application/soap-xml

Now to send a soap request with Android you have to use a URLConnection and 2 streams.
An inputstream and an outputstream.

Code:

URL u = new URL(url.toString());
URLConnection cnn = u.openConnection();
cnn.setDoOutput(true);
cnn.setDoInput(true);

((HttpURLConnection)cnn).setRequestMethod("POST");
cnn.setRequestProperty("Content-Type", "application/soap-xml; charset=utf-8");
cnn.setRequestProperty("SOAPAction", method);

OutputStream outStream = cnn.getOutputStream();
outStream.write(soapXML);

InputStream in = cnn.getInputStream();

You need to open the URLConnection.
You set the requestMethod to POST.
You set the content-type to application/soap-xml.
You set a SOAPAction header to the method you want to use. (This is not shown on the previous example which I have from wikipedia.)
You write the soapXml envelope to the outputstream.
You read the response from the inputstream.

You can parse the response with an XmlParser if you want to.

I have combined the send and receive code into a class called Webservice. And I made a class called SoapMessage to handle the construction of a Soap envelope.
Then I send the SoapMessage using the send method of the Webservice class and I add an OnReceiveListener to wait for the response.

This is not the most sophisticated method and probably not the most complete method to send and receive Soap messages but it works in android 2.2 perfectly. As SAX Parser not getting proper response.

SAX Parser example coming soon in next Post

source : http://androidforums.com/developer-101/233069-how-create-weservice-client-android.html

How to Create MD5 Hashed Code in Android

2011-10-03T17:03:00.001+05:30

Dear Blog Viewer,

What is the MD5 hash?

The MD5 hash also known as checksum for a file is a 128-bit value, something like a fingerprint of the file. There is a very small possibility of getting two identical hashes of two different files. This feature can be useful both for comparing the files and their integrity control.

Let us imagine a situation that will help to understand how the MD5 hash works.

Alice and Bob have two similar huge files. How do we know that they are different without sending them to each other? We simply have to calculate the MD5 hashes of these files and compare them.

MD5 Hash Properties

The MD5 hash consists of a small amount of binary data, typically no more than 128 bits. All hash values share the following properties:

Hash length

The length of the hash value is determined by the type of the used algorithm, and its length does not depend on the size of the file. The most common hash value lengths are either 128 or 160 bits.

Non-discoverability

Every pair of nonidentical files will translate into a completely different hash value, even if the two files differ only by a single bit. Using today's technology, it is not possible to discover a pair of files that translate to the same hash value.

Repeatability

Each time a particular file is hashed using the same algorithm, the exact same hash value will be produced.

Irreversibility

All hashing algorithms are one-way. Given a checksum value, it is infeasible to discover the password. In fact, none of the properties of the original message can be determined given the checksum value alone.

The algorithm was invented by:

Professor Ronald L. Rivest (born 1947, Schenectady, New York) is a cryptographer, and is the Viterbi Professor of Computer Science at MIT's Department of Electrical Engineering and Computer Science. He is most celebrated for his work on public-key encryption with Len Adleman and Adi Shamir, specifically the RSA algorithm, for which they won the 2002 ACM Turing Award.

Simple Code for Android:

public static final String md5Digest(final String text)

{

     try

     {

           // Create MD5 Hash

           MessageDigest digest = java.security.MessageDigest.getInstance("MD5");

           digest.update(text.getBytes());

           byte messageDigest[] = digest.digest();

           // Create Hex String

           StringBuffer hexString = new StringBuffer();

           int messageDigestLenght = messageDigest.length;

           for (int i = 0; i < messageDigestLenght; i++)

           {

                String hashedData = Integer.toHexString(0xFF & messageDigest[i]);

                while (hashedData.length() < 2)

                     hashedData = "0" + hashedData;

                hexString.append(hashedData);

           }

           return hexString.toString();

     } catch (NoSuchAlgorithmException e)

     {

           e.printStackTrace();

     }

     return ""; // if text is null then return nothing

}

How to Change Tab Name from Activity in Android

2011-09-20T12:55:00.003+05:30

Tabs in the Android work with TabWidgets.

Contained in the tabwidget are relative layouts for each of your tabs which each contain an imageview and a textview.

Tab index will start from 0 and to access the Tab Contents use the following steps.

For Example. if you want to access title of tab

mTabHost.getTabWidget().getChildAt(0).findViewById(android.R.id.title);

the above statement will provide the view (TextView) at this position.

change the text of Tab

TextView v = ((TextView)mTabHost.getTabWidget().getChildAt(0).findViewById(android.R.id.title));

v.setText("My New Title");

Congratulations.

Your text of tab is changed.

How to Convert InputStream to String In Java

2011-09-14T11:24:00.001+05:30

Here is the Simple method to convert InputStream Object to String Object.

Just Call this method and pass InputStream Object. it return the String

public static String convertStreamToString(InputStream is) throws Exception
{
BufferedReader reader = new BufferedReader(new InputStreamReader(is));
StringBuilder sb = new StringBuilder();
String line = null;

while ((line = reader.readLine()) != null) {
sb.append(line);
}

is.close();

return sb.toString();
}

How to get Multiple Select List-Box in PHP

2011-09-13T10:49:00.002+05:30

Multiple ListBox in HTML will send the array of selected item.

Sample PHP Code to access the Multiple Selected List-Box Values.

<html>
<head>
<title>List Box Form Data</title>
</head>
<body>
     <h3>List Box Form Data</h3>
     <p>Form data passed from the form</p>
    
    <?php
        echo "<p>select: " . $_POST['select']."</p>\n"; 
        echo "<p>listbox: " . $_POST['listbox'] . "</p>\n";
        $values = $_POST['listmultiple'];
        echo "<p>listmultiple: ";
        foreach ($values as $a){
            echo $a;
        }
        echo "</p>\n";
    ?>
</body>
</html>

How to find Android Unique Device ID or UDID - Part 1

2011-09-09T13:22:00.002+05:30

Here is the Simple Statement to find Android Device ID which return a String.

String udid = Secure.getString(getContentResolver(), Secure.ANDROID_ID)

Please Note :

ANDROID_ID is a 64-bit number (as a hex string) that is RANDOMLY GENERATED on the device's first boot and should remain constant for the lifetime of the device.(The value may change if a factory reset is performed on the device.)

Source : Android Documentation

How to Install Android SDK

2011-07-27T11:38:00.000+05:30

General Instructions

Prepare your Computer

Make sure your system meets the minimum requirements
Make sure you have installed the Java Development Kit
(Optional) Install Eclipse IDE
- Eclipse classic is recommended.

Download the SDK Starter Package

The SDK starter package is not a full development environment—it includes only the core SDK Tools, which you can use to download the rest of the SDK components (such as the latest Android platform).

Download the latest SDK Starter Package

(Optional) Install ADT Plug-in for Eclipse

If you use Eclipse, download the ADT Plug-in

Download platforms and other components

Eclipse: Select Window » Android SDK and AVD Manager
Windows: Double-click the SDK Manager.exe file at the root of the Android SDK directory
Mac or Linux: Open a terminal and navigate to the /tools directory in the Android SDK, then execute ./android

Available Components

By default, there are two repositories of components for your SDK: Android Repository and Third party Add-ons.

The Android Repository offers these components:

SDK Tools (pre-installed in the Android SDK starter package) — Contains tools for debugging and testing your application and other utility tools. You can access these in the <sdk>/tools/ directory of your SDK and read more about them in the Tools section of the developer guide.
SDK Platform-tools — Contains tools that are required to develop and debug your application, but which are developed alongside the Android platform in order to support the latest features. These tools are typically updated only when a new platform becomes available. You can access these in the <sdk>/platform-tools/ directory. Read more about them in the Tools section of the developer guide.
Android platforms — An SDK platform is available for every production Android platform deployable to Android-powered devices. Each platform component includes a fully compliant Android library and system image, sample code, emulator skins, and any version specific tools. For detailed information about each platform, see the overview documents available under the section "Downloadable SDK Components," at left.
USB Driver for Windows (Windows only) — Contains driver files that you can install on your Windows computer, so that you can run and debug your applications on an actual device. You do not need the USB driver unless you plan to debug your application on an actual Android-powered device. If you develop on Mac OS X or Linux, you do not need a special driver to debug your application on an Android-powered device. (See Developing on a Device for more information about developing on a real device.)
Samples — Contains the sample code and apps available for each Android development platform. If you are just getting started with Android development, make sure to download the samples to your SDK.
Documentation — Contains a local copy of the latest multiversion documentation for the Android framework API.

OS Specific Instructions

Linux

ArchLinux

The package android-sdk is included in AUR. No further changes are needed.

Gentoo Linux

emerge dev-util/android-sdk-update-manager
run /opt/android-sdk-update-manager/tools/android
install platform-tools package
ADB will be at /opt/android-sdk-update-manager/platform-tools/adb
Edit your .bashrc file and add this line:

export PATH="/opt/android-sdk-update-manager/platform-tools/:${PATH}"

Ubuntu Linux

Follow the General Instructions above.
Setup udev.

Mac OS X

Installing the Android SDK

Download the latest version of the Android SDK
Unzip it and move it where needed

unzip Downloads/android-sdk_r09-mac_86.zip -d~/bin

Open Terminal.app (in /Applications/Utilities)

Edit ~/.profile and append

export PATH=~/bin/android-sdk_r09-mac_86/platform-tools:~/bin/android-sdk_r09-mac_86/tools:$PATH

Load new .profile

source .profile

Run Android SDK Manager

android

Install Components

Installing Eclipse

Download the latest version of Eclipse (Classic or Java Developers are probably best)
Open Terminal.app (in /Applications/Utilities)
Unzip it and move it where needed.

tar -zxvf Downloads/eclipse-java-helios-SR1-macosx-cocoa-x86_64.tar.gz
- Optional: Add to PATH. Edit ~/.profile and append export PATH=[eclipse folder]:$PATH then reload source .profile.

Open Eclipse.

Open Preferences, go to Android. Set your SDK location. Click OK.

Go to Help » Install New Software.

Click Add.
- Name: Google ADT
- Location: https://dl-ssl.google.com/android/eclipse/

Install pieces that you want.

Windows

Download the latest Android SDK (preferably the zip file not the exe).
Unzip the package to the root of C:\.

NOTE: This will output a folder called "android-sdk-windows".

Open up the android-sdk-windows folder and launch the SDK Manager.

When you launch the SDK Manager for the first time it will ask for which packages to install. The only package we are concerned with at this time is "Android SDK Platform-tools, revision 6". You can reject all the others if you are not interested in them.

Once that is finished, you will need to install the USB drivers included with the Android SDK.
1. Click on"Available Packages" on the left.
2. Expand "Third party Add-ons".
3. Expand "Google Inc. add-ons".
4. Check "Google USB Driver package, revision 4".
5. Installed Selected.

Once that's finished installing, you can close the SDK Manager.

Go to the Control Panel, and select the System Properties (Windows XP) or System (Windows Vista/7).

Select the Advanced settings;
- Windows XP: Click on the Advanced tab.
- Windows Vista/7: Click on Advanced system settings on the left.

Click on Environment Variables.

Under the "System variable" section, you will look for "Path". Double-click on it.

In the "Variable values" section, add at the very end the location of the tools & package-tools folder, with a semicolon separating these two paths from the rest, e.g. %SystemRoot%;C:\android-sdk-windows\platform-tools;C:\android-sdk-windows\tools.

On the device, ensure that USB Debugging is enabled (Settings » Applications » Development).

Plug the device into the computer via USB cable. The computer will attempt to install the drivers automatically.

On success, open the command prompt on the computer, and type in the following command to sure everything is setup properly:

adb devices

If it lists any devices, everything is fine and you are finished. If not, the drivers may not be installed correctly, please continue.

Open the Device Manager.
1. Right-click on My Computer (Windows XP) or Computer (Windows Vista/7).
2. Click on Manage.
3. Click on Device Manager on the left.

You will probably see Unknown Device with ADB listed under it with a yellow exclamation mark.

Right-click on ADB.

Click on "Update Driver Software".

Click on "Browse my computer for driver software".

Click on "Let me pick from a list of device drivers on my computer".

Click on "Have Disk".

Click on "Browse".

Navigate to "C:\android-sdk-windows\extras\google\usb_driver" and select "android_winusb.inf".

Click on "Android ADB Interface".

NOTE: You will get an Update Driver Warning, click on "Yes".

Once finished installing the driver, open the command prompt on the computer, and type in the following command to sure everything is setup properly:

adb devices

If it lists any devices, everything is fine and you are finished. If not, you may have further issues and will have to do further research on your own.

source : http://wiki.cyanogenmod.com/wiki/Howto:_Install_the_Android_SDK

The connection to adb is down, and a severe error has occured

2011-07-27T11:21:00.002+05:30

Try below steps:

Close the Eclipse if running
Go to the Android SDK tools directory in Command Prompt
type adb kill-server
then type adb start-server
No error message is thrown while starting ADB server, then adb is started successfully.
Now you can start Eclipse again.

It worked for me this way, Eclipse should be closed before issuing these commands.

Open up the Windows task manager, and kill the process named adb.exe, re-launch the Eclipse.

Go to the Folder \android-sdk\platform-tools ; copy the files and paste into folder \android-sdk\tools
Restart the Eclipse

source : http://stackoverflow.com/questions/4072706/the-connection-to-adb-is-down-and-a-severe-error-has-occured

Credit Card Number Validation

2011-07-19T18:49:00.002+05:30

Informal explanation

The formula verifies a number against its included check digit, which is usually appended to a partial account number to generate the full account number. This account number must pass the following test:

Counting from the check digit, which is the rightmost, and moving left, double the value of every second digit.
Sum the digits of the products (eg, 10 = 1 + 0 = 1, 14 = 1 + 4 = 5) together with the undoubled digits from the original number.
If the total modulo 10 is equal to 0 (if the total ends in zero) then the number is valid according to the Luhn formula; else it is not valid.

Assume an example of an account number "4992739871" that will have a check digit added, making it of the form 4992739871x:

Account number	4	9	9	2	7	3	9	8	7	1	x
Double every other	4	18	9	4	7	6	9	16	7	2	x
Sum together all numbers	64	+ x

To make the sum divisible by 10, we set the check digit (x) to 6, making the full account number 49927398716.
The account number 49927398716 can be validated as follows:

Double every second digit, from the rightmost: (1×2) = 2, (8×2) = 16, (3×2) = 6, (2×2) = 4, (9×2) = 18
Sum all the individual digits (digits in parentheses are the products from Step 1): 6 + (2) + 7 + (1+6) + 9 + (6) + 7 + (4) + 9 + (1+8) + 4 = 70
Take the sum modulo 10: 70 mod 10 = 0; the account number is probably valid.

Sample Code to Check Card No.

public boolean luhnCardValidationMethod(String cardNumber) {

        char[] charArray = cardNumber.toCharArray();
        int[] number = new int[charArray.length];
        int total = 0;
        for (int i = 0; i < charArray.length; i++)
        {
            number[i] = Character.getNumericValue(charArray[i]);
        }

        for (int i = number.length - 2; i > -1; i -= 2)
        {
            number[i] *= 2;

            if (number[i] > 9)
                number[i] -= 9;
        }

        for (int i = 0; i < number.length; i++)
        {
            total += number[i];
        }

        if (total % 10 != 0)
        {
            //TODO if total%10 is not Equals to Zero the Card is Invalid
            return false;
        }

        //TODO Else Card is Valid
        return true;
    }

Source : http://en.wikipedia.org/wiki/Luhn_algorithm

Some More Tips to Check Card Number.

1. Prefix, Length, and Check Digit Criteria

Here is a table outlining the major credit cards that you might want to validate.

CARD TYPE	Prefix	Length	Check digit algorithm
MASTERCARD	51-55	16	mod 10
VISA	4	13, 16	mod 10
AMEX	34 37	15	mod 10
Diners Club/ Carte Blanche	300-305 36 38	14	mod 10
Discover	6011	16	mod 10
enRoute	2014 2149	15	any
JCB	3	16	mod 10
JCB	2131 1800	15	mod 10

2. LUHN Formula (Mod 10) for Validation of Primary Account Number

The following steps are required to validate the primary account number:

Step 1:
Double the value of alternate digits of the primary account number beginning with the second digit from the right (the first right--hand digit is the check digit.)

Step 2:
Add the individual digits comprising the products obtained in Step 1 to each of the unaffected digits in the original number.

Step 3:
The total obtained in Step 2 must be a number ending in zero (30, 40, 50, etc.) for the account number to be validated.

For example :

To validate the primary account number 49927398716:

Step 1:

        4     9     9     2     7     3     9     8     7     1     6
              x2           x2         x2          x2          x2 
-----------------------------------------------------------
             18            4            6           16            2

Step 2:

4 +(1+8)+ 9 + (4) + 7 + (6) + 9 +(1+6) + 7 + (2) + 6

Step 3:

Sum = 70 : Card number is validated

Note: Card is valid because the 70/10 yields no remainder.

Source : http://www.beachnet.com/~hstiles/cardtype.html

Comments Always Welcome..... :)

Disable Back Key (Button on Device) in Android

2011-07-19T18:24:00.001+05:30

Here is the code to disable device back key in android

Override the onKeyDown activity method. And check for Back Key Event using KeyEvent.KEYCODE_BACK with

Key Hit Count using event.getRepeatCount()==0

event.getRepeatCount use to get number of time key pressed.

if the both the condition true call any customized method where your business logic will be there.

Here I use onBackPressed(); and return nothing.

Note : if you use statement return in onKeyDown Method you will get ERROR.

So better idea is to use any method and write just return.

@Override
public boolean onKeyDown(int keyCode, KeyEvent event)  {
    if ( keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {

        onBackPressed();
    }

    return super.onKeyDown(keyCode, event);
}
@Override
public void onBackPressed() {

    return;
}

Welcome for All Comments........ :)

SmartPhones by Sachin Shelke ™: How to Create ProgressBar in Android using XML

2011-06-30T12:53:00.000+05:30

SmartPhones by Sachin Shelke ™: How to Create ProgressBar in Android using XML: "How to use progress bar using Layout.xml file follow the steps.... Step : 1 - Create XML with as given below <Line..."

JSON Data Parsing in Android - Part - 1

2011-06-30T12:52:00.001+05:30

We are discussing the following points to Parse JSON data in android

Why JSON Format?
Syntax & Structure of JSON Format
Relation Between Android & JSON
Steps to Parse JSON data in Android
Sample Application

Why JSON [JavaScript Object Notation] Format?

Lightweight data-interchangeable format
Text format that is completely language independent and easy to read
JSON is
- A collection of name/value pairs. In various languages, this is realized as an object, record, struct, dictionary, hash table, keyed list, Key-Value Pair , or associative array.
- An ordered list of values. In most languages, this is realized as an array, vector, list, or sequence.

Syntax & Structure of JSON Format

With Normal Object Collection
Object_Name : {Key1 : Value1 , Key2 : Value2 , Key3 : Value3}

Example =
{
      "FileMenu": {
                               "subMenu":"New","details":"Create New File",
                               "subMenu":"Open","details":"Open Existing File",
                               "subMenu":"Save","details":"Save File"
                         }
}
With Array Based Object Collection
Object_Name : [
                               {Key1_1 : Value1_1 , Key1_2 : Value1_2 , Key1_3 : Value1_3},
                               {Key2_1 : Value2_1 , Key2_2 : Value2_2 , Key2_3 : Value2_3}
                      ]

Example =
{
      "Menu": {
                         "menu":"File",
                         "value":"File",
                         "popup":{
                                                "MenuItem":
                                                [
                                                             {"subMenu":"New","details":"Create New File"},                                                                            {"subMenu":"Open","details":"Open Existing File"},
                                                             {"subMenu":"Save","details":"Save File"}
                                                 ]
                                      }
                    }
}

Relation Between Android & JSON

Android already have inbuild JSON libraries. The Following class are used to parse the JSON Object.

    JSONArray         A JSONArray is an ordered sequence of values.
    JSONObject    A JSONObject is an unordered collection of name/value pairs.
    JSONStringer     JSONStringer provides a quick and convenient way of producing JSON text.
    JSONTokener     A JSONTokener takes a source string and extracts characters and tokens from it.

Steps to Parse JSON Data in Android

1. Create a JSON Object and Convert JSONString to JSON Object
    JSONObject jsonObject = new JSONObject(jsonDataString);

2. Create a Key based JSONObject.
    JSONObject menuObject = jsonObject.getJSONObject("Menu");

3. Get the Value
    Log.d("JSON", "Menu = " + menuObject.getString("menu"));
    Log.d("JSON", "Value = " + menuObject.getString("value"));

Android JSON Example

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
String myJsonContent = "{\"Menu\": {\"menu\":\"File\",\"value\":\"File\",\"popup\":{\"MenuItem\":[{\"subMenu\":\"New\",\"details\":\"Create New File\"},{\"subMenu\":\"Open\",\"details\":\"Open Existing File\"},{\"subMenu\":\"Save\",\"details\":\"Save File\"}]}}}";
        sampleJsonParser(myJsonContent);
    }

    public void sampleJsonParser(String jsonString) {
        try {
            JSONObject jObject = new JSONObject(jsonString);
            JSONObject menuObject = jObject.getJSONObject("Menu");
            Log.d("JSON", "Menu = " +menuObject.getString("menu"));
            Log.d("JSON", "Value = " + menuObject.getString("value"));
            JSONObject popupObject = menuObject.getJSONObject("popup");
            JSONArray menuitemArray = popupObject.getJSONArray("MenuItem");
            for (int i = 0; i < 3; i++) {
                Log.d("JSON", "Name = " + menuitemArray.getJSONObject(i).getString("subMenu")
                        .toString());
                Log.d("JSON", "Value = " +menuitemArray.getJSONObject(i).getString(
                        "details").toString());
            }
       } catch (JSONException e) {
            e.printStackTrace();
        }
    }
}

Download Source Code & SVN Repository

Check Your Log with Tag JSON

Enjoy The Code................

Don't Forget to Leave Comments....

How to Create ProgressBar in Android using XML

2011-06-29T17:38:00.000+05:30

How to use progress bar using Layout.xml file
follow the steps....
Step : 1 -
Create XML with <ProgressBar .....> as given below

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical" android:layout_width="fill_parent"

    android:layout_height="fill_parent">

    <TextView android:layout_width="fill_parent"

        android:layout_height="wrap_content" android:text="My Progress Bar Demo" />

    <ProgressBar android:id="@+id/progressbar"

        android:layout_width="wrap_content" android:layout_height="wrap_content"  android:layout_gravity="center" style="?android:attr/progressBarStyleLarge"/>

</LinearLayout> 

Note: You can change the ProgressBar Style to

android:progressBarStyle
android:progressBarStyleHorizontal
android:progressBarStyleLarge
android:progressBarStyleSmall

See the screen Show Below

Step : 2 -

Create an Activity to show progress bar on Screen

public class MyProgressBar extends Activity 
{    
    private static int progress = 0;
    private ProgressBar progressBar;
    private int progressStatus = 0;
    private Handler handler = new Handler();
 
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.basicviews);
 
        progressBar = (ProgressBar) findViewById(R.id.progressbar);
 
        //---do some work in background thread---
        new Thread(new Runnable() 
        {
            public void run() 
            {
                //---do some work here---
                while (progressStatus < 10) 
                {
                    progressStatus = taskToDo();
                }
 
                //---hides the progress bar---
                handler.post(new Runnable() 
                {
                    public void run() 
                    {
                        progressBar.setVisibility(View.GONE);
                    }
                });
            }    
 
            //---do some long lasting work here---
            private int taskToDo() 
            {
                try {
                    Thread.sleep(500);
                } catch (InterruptedException e) 
                {
                    e.printStackTrace();
                }
                return ++progress;
            }
 
        }).start();  
    }
}

How To Remove Extra Spaces From String

2011-06-09T12:43:00.002+05:30

public static String LRTrim(String str) {

str = str.replaceAll(" ", " "); // replace all double spaces with single Space
return str.trim(); // remove all LEFT side & Right Side Extra white spaces from the string
}

Sending ThirdParty Email in Android

2011-06-08T10:27:00.001+05:30

Hi All,
This is first step to send third party email from Android Application.

There are total 5 steps to create to send email application in android.
Please Compile program after complete all steps.
Yout have to add some external Library into Application. Find the Step 5 For the Same.

Step : 1 Write the Main Activity where you want to send email.

final Button send = (Button) this.findViewById(R.id.sentBtn);
send.setOnClickListener(new View.OnClickListener()
{
    public void onClick(View view)
    {
        //this is use to send email from which account
        GMailSender sender = new GMailSender("<Gmail UserName>", "<Ur PASSWORD>");
        try
        {
            // Add your Data like subject , message, senderEmail and email to
            sender.sendMail("Demo Transaction Receipt", "This is Demo Transaction email",
                            "<Sender Email Address>", "<email TO>");
        } catch (Exception e)
        {
            Log.e("SendMail", e.getMessage(), e);
        }
    }
});

Step : 2 --> Write the GMailSender where you have set you email sender setting. we are using Google setting as we are sending email using Gmail account

//import necessary packages

public class GMailSender extends javax.mail.Authenticator
{
    private String mailhost = "smtp.gmail.com";
    private String user;
    private String password;
    private Session session;

    static
    {
          //you have to create JSSEProvider() please find the Class Below
          Security.addProvider(new JSSEProvider());
    }

    public GMailSender(String user, String password)
    {
       this.user = user;
       this.password = password;

       Properties props = new Properties();
       props.setProperty("mail.transport.protocol", "smtp");
       props.setProperty("mail.host", mailhost);
       props.put("mail.smtp.auth", "true");
       props.put("mail.smtp.port", "465");
       props.put("mail.smtp.socketFactory.port", "465");
       props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
       props.put("mail.smtp.socketFactory.fallback", "false");
       props.setProperty("mail.smtp.quitwait", "false");

       session = Session.getDefaultInstance(props, this);
    }

    protected PasswordAuthentication getPasswordAuthentication()
    {
       return new PasswordAuthentication(user, password);
    }

    public synchronized void sendMail(String subject, String body, String sender, String recipients) throws Exception
    {
       try
       {
           MimeMessage message = new MimeMessage(session);
           DataHandler handler = new DataHandler(new ByteArrayDataSource(body.getBytes(), "text/html"));
           message.setSender(new InternetAddress(sender));
           message.setSubject("Demo Transaction Receipt");
           message.setDataHandler(handler);
           if (recipients.indexOf(',') > 0)
               message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recipients));
           else
               message.setRecipient(Message.RecipientType.TO, new InternetAddress(recipients));
           Transport.send(message);
       } catch (MessagingException e)
       {
           // TODO Auto-generated catch block
           e.printStackTrace();
       } catch (Exception e)
       {
           // TODO Auto-generated catch block
           e.printStackTrace();
       }
    }

    public class ByteArrayDataSource implements DataSource
    {
       private byte[] data;
       private String type;

       public ByteArrayDataSource(byte[] data, String type)
       {
           super();
           this.data = data;
           this.type = type;
       }

       public ByteArrayDataSource(byte[] data)
       {
           super();
           this.data = data;
       }

       public void setType(String type)
       {
           this.type = type;
       }

       public String getContentType()
       {
           if (type == null)
               return "application/octet-stream";
           else
               return type;
       }

       public InputStream getInputStream() throws IOException
       {
           return new ByteArrayInputStream(data);
       }

       public String getName()
       {
           return "ByteArrayDataSource";
       }

       public OutputStream getOutputStream() throws IOException
       {
           throw new IOException("Not Supported");
       }
    }
}

Step : 3 Write the JSSEProvider for Security Setting

public final class JSSEProvider extends Provider
{

    public JSSEProvider()
   {
       super("HarmonyJSSE", 1.0, "Harmony JSSE Provider");
       AccessController.doPrivileged(new java.security.PrivilegedAction<Void>()
       {
           public Void run()
           {
               put("SSLContext.TLS", "org.apache.harmony.xnet.provider.jsse.SSLContextImpl");
               put("Alg.Alias.SSLContext.TLSv1", "TLS");
               put("KeyManagerFactory.X509", "org.apache.harmony.xnet.provider.jsse.KeyManagerFactoryImpl");
               put("TrustManagerFactory.X509", "org.apache.harmony.xnet.provider.jsse.TrustManagerFactoryImpl");
               return null;
           }
       });
   }
}

Step : 4 Setting Internet Permission in AndroidManifest.xml

As We know, to send email we required Internet Connection and Permission to the application.
Add the following permission in AndroidMenifest.xml above <application Tag......></application>

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

Step : 4 Adding External Library

To Send email we need to Add some External Library into an Application
Download the Following Libraries and follow the Steps

Activation.jar
Additionnal.jar
Mail.jar

How To add External Libraries in Eclipse Project

Open Package Explorer
Write Click on the Project
Mouse Over on "Build Path" --> and select "Add External Archives"
Select all the Libraries which you want to add. Here we are adding above libraries.
Congratulation.

Now You Can Compile your project and send email.

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Hint Not Displaying When changing Alignment in EditText

2011-05-17T16:28:00.000+05:30

This issue is due to the choice of adding gravity to center the text. There is a known bug in the SDK that, as of 2.3, it looks like is still not fixed. This bug hides the hint text when android:singleLine and any custom value of android:gravity are set together. Your choice at this juncture really is to remove one or the other. Some workaround options:

Remove the android:gravity declaration and have the text left-aligned.
Keep the declaration and remove android:singleLine. In this case, you will probably have to override the Editor Action in order to get the default Next or Done button on the soft keypad.
replace parameter android:singleLine to android:maxLine
Remove android:gravity, and set layout_width="wrap_content". Then appropriately center the entire widget in the parent layout. This may look a little goofy with the standard EditText background as it will grow and shrink. You may have to set this to null and make the background part of a parent container.

Also, don't forget to star the bug :)

and leave the comments

Source : stackoverflow.com

Hide Tabbar on Soft Keyboard Automatically open in Android

2011-05-10T16:04:00.000+05:30

Add the following attribute in menifest file while declaring the activity

<activity android:name=".ActivityName" android:windowSoftInputMode="adjustPan">

This is better idea to use attribute in menifest file rather using setOnFocusChangeListener() for every Edit Text

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