Android Mobile Application Development

How to check SDCard free space in ANDROID?

2012-07-23T10:50:00.003+05:30

This is a simple example that shows how many bytes are free in your SDCard.
Inorder to run this example, you have to create an SDCard and start the emulator with the SDCard.
Now create a fresh project and name it “FreeSpaceActivity.java” and copy the following code to it.

package pack.coderzheaven.check_space;

import android.app.Activity;

import android.graphics.Color;

import android.os.Bundle;

import android.os.Environment;

import android.os.StatFs;

import android.widget.TextView;

public class FreeSpaceActivity extends Activity {

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        StatFs stat_fs = new StatFs(Environment.getExternalStorageDirectory().getPath());

        double avail_sd_space = (double)stat_fs.getAvailableBlocks() *(double)stat_fs.getBlockSize();

        double GB_Available = (avail_sd_space / 1073741824);

        System.out.println("Available GB : " + GB_Available);

        TextView tv = (TextView)findViewById(R.id.tv);

        tv.setText("Your SD Card is " + GB_Available + " bytes free." );

        tv.setTextColor(Color.GREEN);

        tv.setTextSize(20);

    }

}

The main.xml file

?

<?xml version="1.0" encoding="utf-8"?>

<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=""

    android:id="@+id/tv"

    />

</LinearLayout>

AndroidManifest file

?

<?xml version="1.0" encoding="utf-8"?>

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

      package="pack.coderzheaven.check_space"

      android:versionCode="1"

      android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".FreeSpaceActivity"

                  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>

Please leave your comments if the post was useful.

TextSwitching animation in ANDROID or Using TextSwitcher Control in ANDROID

2012-07-23T10:48:00.002+05:30

Today I will show you how to do a simple and beautiful text animation while switching the text in a textView in android
The advantage is that you don’t need a seperate xml file for animation in this program, all is done inside the java code.
This is the main java file.

?

package pack.coderzheaven;

import android.app.Activity;

import android.graphics.Color;

import android.os.Bundle;

import android.view.Gravity;

import android.view.View;

import android.view.animation.Animation;

import android.view.animation.AnimationUtils;

import android.widget.Button;

import android.widget.TextSwitcher;

import android.widget.TextView;

import android.widget.ViewSwitcher;

public class TextSwitcherDemo extends Activity implements ViewSwitcher.ViewFactory,

        View.OnClickListener {

    private TextSwitcher mSwitcher;

    private int mCounter = 0;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        mSwitcher = (TextSwitcher) findViewById(R.id.switcher);

        mSwitcher.setFactory(this);

        Animation in = AnimationUtils.loadAnimation(this,  android.R.anim.fade_in);

        Animation out = AnimationUtils.loadAnimation(this, android.R.anim.fade_out);

        mSwitcher.setInAnimation(in);

        mSwitcher.setOutAnimation(out);

        Button nextButton = (Button) findViewById(R.id.next);

        nextButton.setOnClickListener(this);

        updateCounter();

    }

    public void onClick(View v) {

        mCounter++;

        updateCounter();

    }

    private void updateCounter() {

        mSwitcher.setText(String.valueOf(mCounter));

    }

    public View makeView() {

        TextView t = new TextView(this);

        t.setGravity(Gravity.CENTER | Gravity.CENTER_HORIZONTAL);

        t.setTextSize(70);

        t.setTextColor(Color.RED);

        return t;

    }

}

Here we use a widget called TextSwitcher in android.
Now the main.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">

    <TextView android:id="@+id/tv"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/hello"

        android:textStyle="bold|italic"/>

    <Button android:id="@+id/next"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Switch"

        android:textStyle="bold|italic" />

    <TextSwitcher android:id="@+id/switcher"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content" />

</LinearLayout>

Strings.xml

?

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="hello">TextSwitcher Demo from CoderzHeaven</string>

    <string name="app_name">TextSwitcher Demo</string>

</resources>

AndroidManifest.xml file contents.

?

<?xml version="1.0" encoding="utf-8"?>

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

      package="pack.coderzheaven"

      android:versionCode="1"

      android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".TextSwitcherDemo"

                  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>

TextSwitcher

How to listen to the softkeyboard done button in android?

2012-07-23T10:46:00.001+05:30

Instead of using a button on the view we can use the softkeyboard done button to trigger an action. The action can include calling another activity or retrieving the data from the EditText etc.
The main.xml contains an Edittext

<?xml version="1.0" <span class="IL_AD" id="IL_AD2">encoding</span>="utf-8"?>

<LinearLayout xmlns:android="http://<span class="IL_AD" id="IL_AD5">schemas</span>.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="@string/hello"

        />

    <EditText android:layout_width="match_parent"

        android:singleLine="true"

        android:inputType="textNoSuggestions"

        android:layout_height="wrap_content"

        android:id="@+id/editText1">

            <requestFocus></requestFocus>

        </EditText>

</LinearLayout>

For listening to the keyboard event we need onKeyListener

<span class="IL_AD" id="IL_AD8">import</span> android.app.Activity;

import android.content.Context;

import android.os.Bundle;

import android.view.KeyEvent;

import android.view.View;

import android.view.inputmethod.InputMethodManager;

import android.widget.EditText;

import android.widget.Toast;

public class TesstActivity extends Activity {

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        EditText text = (EditText) findViewById(R.id.editText1);

        text.setOnKeyListener(onSoftKeyboardDonePress);

    }

    private View.OnKeyListener onSoftKeyboardDonePress=new View.OnKeyListener()

    {

        public boolean onKey(View v, int keyCode, KeyEvent event)

        {

            if (event.getKeyCode() == KeyEvent.KEYCODE_ENTER)

            {

                Toast.makeText(TesstActivity.this, "checking event", Toast.LENGTH_LONG).show();

            }

            return false;

        }

    };

}

How to Open camera in ANDROID?

2012-07-23T10:44:00.000+05:30

In today’s tutorial I will show you how to use camera in ANDROID in your program.
In this tutorial we will be having a button which will open the camera and after taking the photo it will show it in an imageView.
Note: This program will work only in the real device not in the emulator. So make sure to test it in the device itself. Also make sure to add the permission while using camera as shown below in your AndroidManifest file.

1	`<uses-feature` `android:name="android.hardware.camera"></uses-feature>`

Here is the main java file code

?

package com.coderzheaven;

<span class="IL_AD" id="IL_AD8">import</span> android.app.Activity;

import android.content.Intent;

import android.graphics.Bitmap;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.ImageView;

public class OpenCameraDemo extends Activity {

    private static final int CAMERA_PIC_REQUEST = 2500;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        Button b = (Button)findViewById(R.id.Button01);

        b.setOnClickListener(new OnClickListener() {

            public void onClick(View v) {

                 Intent cameraIntent = new Intent(android.<span class="IL_AD" id="IL_AD12">provider</span>.<span class="IL_AD" id="IL_AD6">MediaStore</span>.ACTION_IMAGE_CAPTURE);

                 startActivityForResult(cameraIntent, CAMERA_PIC_REQUEST);

            }

        });

    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        if (requestCode == CAMERA_PIC_REQUEST) {

              Bitmap image = (Bitmap) data.getExtras().get("data");

              ImageView imageview = (ImageView) findViewById(R.id.ImageView01);

              imageview.setImageBitmap(image);

        }

    }

}

Now the main.xml file which contains the button and the imageview.

?

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://<span class="IL_AD" id="IL_AD5">schemas</span>.android.com/apk/res/android"

    android:<span class="IL_AD" id="IL_AD9">orientation</span>="<span class="IL_AD" id="IL_AD11">vertical</span>"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    >

<TextView

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="@string/hello"

    />

<ImageView

    android:id="@+id/ImageView01"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

</ImageView>

<Button

    android:text="Open Camera"

    android:id="@+id/Button01"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

</Button>

</LinearLayout>

The strings.xml file

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="hello">Hello World, OpenCameraDemo!</string>

    <string name="app_name">OpenCamera</string>

</resources>

And the AndroidManifest.xml file.

<?xml version="1.0" encoding="utf-8"?>

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

      package="com.coderzheaven"

      android:versionCode="1"

      android:versionName="1.0">

      <uses-feature android:name="android.hardware.camera"></uses-feature>

    <<span class="IL_AD" id="IL_AD3">application</span> android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".OpenCameraDemo"

                  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>

A Simple FlashLight Application.

2012-07-23T10:42:00.001+05:30

Here is a simple Application on how to use flashlight in android.

?

package com.coderzheaven.pack;

import android.app.Activity;

import android.content.Context;

import android.content.pm.PackageManager;

import android.hardware.Camera;

import android.hardware.Camera.Parameters;

import android.os.Bundle;

import android.util.Log;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class FlashLightActivity extends Activity {

    //flag to detect flash is on or off

    private boolean isLighOn = false;

    private Camera camera;

    private Button button;

    @Override

    protected void onStop() {

        super.onStop();

        if (camera != null) {

            camera.release();

        }

    }

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        button = (Button) findViewById(R.id.buttonFlashlight);

        Context context = this;

        PackageManager pm = context.getPackageManager();

        // if device support camera?

        if (!pm.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {

            Log.e("err", "Device has no camera!");

            return;

        }

        try{

            camera = Camera.open();

            final Parameters p = camera.getParameters();

            button.setOnClickListener(new OnClickListener() {

                @Override

                public void onClick(View arg0) {

                    if (isLighOn) {

                        Log.i("info", "torch is turn off!");

                        p.setFlashMode(Parameters.FLASH_MODE_OFF);

                        camera.setParameters(p);

                        camera.stopPreview();

                        isLighOn = false;

                    } else {

                        Log.i("info", "torch is turn on!");

                        p.setFlashMode(Parameters.FLASH_MODE_TORCH);

                        camera.setParameters(p);

                        camera.startPreview();

                        isLighOn = true;

                    }

                }

            });

        }catch(Exception e){

            Toast.makeText(this, "Your device doesnot have FlashLight capability", Toast.LENGTH_LONG).show();

        }

    }

}

Now the layout file main.xml.

<?xml version="1.0" encoding="utf-8"?>

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

    android:id="@+id/relativeLayout1"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent" >

    <Button

        android:id="@+id/buttonFlashlight"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerVertical="true"

        android:layout_centerHorizontal="true"

        android:text="Torch" />

</RelativeLayout>

AndroiManifest.xml file contents.
Make sure to add the permissions.

<?xml version="1.0" encoding="utf-8"?>

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

    package="com.coderzheaven.pack"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="5" />

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

    <uses-feature android:name="android.hardware.camera" />

    <application

        android:debuggable="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name" >

        <activity

            android:label="@string/app_name"

            android:name=".FlashLightActivity" >

            <intent-filter >

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

Email validation in ANDROID.

2012-07-23T10:40:00.001+05:30

This is a simple example showing email validation in ANDROID.
This example uses regex for email validation.
Create a button and an edittext in your main.xml file and try this code.

package com.coderzheaven;

import java.util.regex.Pattern;

import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.Window;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.Toast;

public class EmailValidationDemo extends Activity   {

    EditText TF;

    public Button checkButton;

    public final Pattern EMAIL_ADDRESS_PATTERN = Pattern.compile(

              "[a-zA-Z0-9+._%-+]{1,256}" +

              "@" +

              "[a-zA-Z0-9][a-zA-Z0-9-]{0,64}" +

              "(" +

              "." +

              "[a-zA-Z0-9][a-zA-Z0-9-]{0,25}" +

              ")+"

          );

     @Override

     public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        setContentView(R.layout.main);

       TF=(EditText) findViewById(R.id.TF);

       checkButton=(Button) findViewById(R.id.checkButton);

        checkButton.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {

               String email=TF.getText().toString();

               if(checkEmail(email))

                  Toast.makeText(EmailValidationDemo.this,"Valid Email Addresss", Toast.LENGTH_SHORT).show();

               else

                  Toast.makeText(EmailValidationDemo.this,"Invalid Email Addresss", Toast.LENGTH_SHORT).show();

        }

        });

    }

    private boolean checkEmail(String email) {

        return EMAIL_ADDRESS_PATTERN.matcher(email).matches();

    }

}

How to record an audio in android and email it as attachment?

2012-07-23T10:39:00.000+05:30

This example shows how to record an audio in android and save it in your path and send it as an email attachment.
This example is taken from the developers website.
Note : You should run this on the device otherwise it will not work.
This example will open up an email client after recording and attach it to the email client.
Remember that your device should have the email client application and you should be logged in otherwise you will get the error as “No Application can perform this action”

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

package pack.coderzheaven;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.List;

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.media.MediaPlayer;

import android.media.MediaRecorder;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.util.Log;

import android.view.View;

import android.view.ViewGroup;

import android.widget.Button;

import android.widget.LinearLayout;

public class AudioCaptureDemo extends Activity

{

    private static final String LOG_TAG = "AudioCaptureDemo";

    private static String mFileName = null;

    private RecordButton mRecordButton = null;

    private MediaRecorder mRecorder = null;

    private PlayButton   mPlayButton = null;

    private MediaPlayer   mPlayer = null;

    private void onRecord(boolean start) {

        if (start) {

            startRecording();

        } else {

            stopRecording();

        }

    }

    private void onPlay(boolean start) {

        if (start) {

            startPlaying();

        } else {

            stopPlaying();

        }

    }

    private void startPlaying() {

        mPlayer = new MediaPlayer();

        try {

            mPlayer.setDataSource(mFileName);

            mPlayer.prepare();

            mPlayer.start();

        } catch (IOException e) {

            Log.e(LOG_TAG, "prepare() failed");

        }

    }

    private void stopPlaying() {

        mPlayer.release();

        mPlayer = null;

    }

    private void startRecording() {

        mRecorder = new MediaRecorder();

        mRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);

        mRecorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

        mRecorder.setOutputFile(mFileName);

        mRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

        try {

            mRecorder.prepare();

        } catch (IOException e) {

            Log.e(LOG_TAG, "prepare() failed");

        }

        mRecorder.start();

    }

    private void stopRecording() {

        mRecorder.stop();

        mRecorder.release();

        mRecorder = null;

        ArrayList<String> uris = new ArrayList<String>();

        mFileName = Environment.getExternalStorageDirectory().getAbsolutePath();

        mFileName += "/audiorecordtest.3gp";

        uris.add(mFileName);

        email(AudioCaptureDemo.this,"test@test.com","test@test.com","No Subject","Sample Email text",uris);

    }

    public static void email(Context context, String emailTo, String emailCC,

            String subject, String emailText, List<String> filePaths)

        {

            //need to "send multiple" to get more than one attachment

            final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND_MULTIPLE);

            emailIntent.setType("plain/text");

            emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL,

                new String[]{emailTo});

            emailIntent.putExtra(android.content.Intent.EXTRA_CC,

                new String[]{emailCC});

            //has to be an ArrayList

            ArrayList<Uri> uris = new ArrayList<Uri>();

            //convert from paths to Android friendly Parcelable Uri's

            for (String file : filePaths)

            {

                File fileIn = new File(file);

                Uri u = Uri.fromFile(fileIn);

                uris.add(u);

            }

            emailIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);

            context.startActivity(Intent.createChooser(emailIntent, "Send mail..."));

    }

    class RecordButton extends Button {

        boolean mStartRecording = true;

        OnClickListener clicker = new OnClickListener() {

            public void onClick(View v) {

                onRecord(mStartRecording);

                if (mStartRecording) {

                    setText("Stop recording");

                } else {

                    setText("Start recording");

                }

                mStartRecording = !mStartRecording;

            }

        };

        public RecordButton(Context ctx) {

            super(ctx);

            setText("Start recording");

            setOnClickListener(clicker);

        }

    }

    class PlayButton extends Button {

        boolean mStartPlaying = true;

        OnClickListener clicker = new OnClickListener() {

            public void onClick(View v) {

                onPlay(mStartPlaying);

                if (mStartPlaying) {

                    setText("Stop playing");

                } else {

                    setText("Start playing");

                }

                mStartPlaying = !mStartPlaying;

            }

        };

        public PlayButton(Context ctx) {

            super(ctx);

            setText("Start playing");

            setOnClickListener(clicker);

        }

    }

    public AudioCaptureDemo() {

        mFileName = Environment.getExternalStorageDirectory().getAbsolutePath();

        mFileName += "/audiorecordtest.3gp";

    }

    @Override

    public void onCreate(Bundle icicle) {

        super.onCreate(icicle);

        LinearLayout ll = new LinearLayout(this);

        mRecordButton = new RecordButton(this);

        ll.addView(mRecordButton,

            new LinearLayout.LayoutParams(

                ViewGroup.LayoutParams.WRAP_CONTENT,

                ViewGroup.LayoutParams.WRAP_CONTENT,

                0));

        mPlayButton = new PlayButton(this);

        ll.addView(mPlayButton,

            new LinearLayout.LayoutParams(

                ViewGroup.LayoutParams.WRAP_CONTENT,

                ViewGroup.LayoutParams.WRAP_CONTENT,

                0));

        setContentView(ll);

    }

    @Override

    public void onPause() {

        super.onPause();

        if (mRecorder != null) {

            mRecorder.release();

            mRecorder = null;

        }

        if (mPlayer != null) {

            mPlayer.release();

            mPlayer = null;

        }

    }

}

Please leave your valuable comments on this post.If you like it share it with your friends by clicking on the +1 button above the post.
Enjoy……….

How to send email from and ANDROID Application programatically?

2012-07-23T10:37:00.000+05:30

Let’s go to the code fast……
This is the code in the mail java file….

?

<span class="IL_AD" id="IL_AD10">package</span> com.coderzheaven;

<span class="IL_AD" id="IL_AD9">import</span> android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;

public class sendMailDemo extends Activity {

    Button send;

    EditText address, subject, emailbody;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        address = (EditText) findViewById(R.id.address);

        subject = (EditText) findViewById(R.id.subject);

        emailbody = (EditText) findViewById(R.id.body);

        send = (Button) findViewById(R.id.send);

        send.setOnClickListener(new OnClickListener() {

            @Override

            public void <span class="IL_AD" id="IL_AD8">onClick</span>(View v) {

                sendEmail();

            }

        });

    }

    public void sendEmail(){

        if(!address.getText().toString().trim().equalsIgnoreCase("")){

          final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND);

          emailIntent.setType("plain/text");

          emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, new String[]{ address.getText().toString()});

          emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, subject.getText());

          emailIntent.putExtra(android.content.Intent.EXTRA_TEXT, emailbody.getText());

          sendMailDemo.this.startActivity(Intent.createChooser(emailIntent, "Send mail..."));

        }

        else{

            Toast.makeText(getApplicationContext(), "Please enter <span class="IL_AD" id="IL_AD2">an email address</span>..", Toast.LENGTH_LONG).show();

        }

      }

    }

Now the layout file (main.xml)

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout android:id="@+id/LinearLayout01" android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    xmlns:android="http://<span class="IL_AD" id="IL_AD7">schemas</span>.android.com/apk/res/android"

    android:<span class="IL_AD" id="IL_AD11">orientation</span>="<span class="IL_AD" id="IL_AD12">vertical</span>"

    android:background="@drawable/android"

    >

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:id="@+id/<span class="IL_AD" id="IL_AD1">emailaddress</span>"

        android:text="Email Address"

        android:textStyle="bold">

    </TextView>

    <EditText

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:width="250dip"

        android:hint="email address"

        android:id="@+id/address">

    </EditText>

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Subject"

        android:textStyle="bold">

    </TextView>

    <EditText

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:width="250dip"

        android:hint="Subject"

        android:id="@+id/subject">

    </EditText>

    <TextView

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Your Message"

        android:textStyle="bold">

    </TextView>

    <EditText

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:lines="5"

        android:hint="Your message here!!"

        android:id="@+id/body">

    </EditText>

    <Button

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:id="@+id/send"

        android:text="Send Email"

        android:width="150dip">

    </Button>

</LinearLayout>

The AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

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

      package="com.coderzheaven"

      android:versionCode="1"

      android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="Send Mail Demo">

        <activity android:name=".sendMailDemo"

                  android:label="Send Mail Demo">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    </application>

</manifest>

Note: However if you test this in your emulator, it will not work. Install it in your device to test it.

How to open wifi settings in android?

2012-07-23T10:34:00.001+05:30

In today’s tutorial I will show you how to open the wifisettings in android programatically.
This code comes handy when the user have not enabled the wifi and you want the user to enable it for your application to work.
Here is the code for that.

?

package com.coderzheaven;

import android.app.Activity;

import android.content.ComponentName;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class OpenWifiSettingsDemo extends Activity {

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        Button open = (Button)findViewById(R.id.open);

        open.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                openWifiSettings();

            }

        });

    }

    public void openWifiSettings(){

        final Intent intent = new Intent(Intent.ACTION_MAIN, null);

        intent.addCategory(Intent.CATEGORY_LAUNCHER);

        final ComponentName cn = new ComponentName("com.android.settings", "com.android.settings.wifi.WifiSettings");

        intent.setComponent(cn);

        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        startActivity( intent);

    }

}

Here is the layout xml- main.xml

<?xml version="1.0" encoding="utf-8"?>

<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="How to open Wifi Settings Demo"

    />

  <Button

    android:layout_width="fill_parent"

    android:layout_height="wrap_content"

    android:text="Open Wifi settings"

    android:id="@+id/open"

    />

</LinearLayout>

Wifi settings in android

How to close All activities in your View Stack in android in one click?

2012-07-23T10:33:00.001+05:30

Today I will show you how to close all views in android in a single click of a button.
Basically if you open a number of activities, each activity is stacked one above the other like a stack if you are not calling finish() on each activity.
But there is a way to close all these activities at once by clearing the stack.
Here is a simple in which it has two activities and after navigating to the second view, the button click will open the first activity and clear the stack.
CloseAllViews.java – This is the first activity.

?

package pack.coderzheaven;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class CloseAllViewsDemo extends Activity {

    Button b;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        b = (Button)findViewById(R.id.Button01);

        b.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                startActivity(new Intent(CloseAllViewsDemo.this, Second.class));

            }

        });

    }

}

main.xml

<?xml version="1.0" encoding="utf-8"?>

<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="This is the First activity."

    />

<Button

    android:text="Go to Second Activity without closing"

    android:id="@+id/Button01"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

</Button>

</LinearLayout>

Second.java – Second Activity.

package pack.coderzheaven;

import android.app.Activity;

import android.content.Context;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class Second extends Activity {

    Button b;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main2);

        b = (Button)findViewById(R.id.Button01);

        b.setOnClickListener(new OnClickListener() {

            @Override

            public void onClick(View v) {

                 Context context = v.getContext();

                    Intent intent = new Intent(context, CloseAllViewsDemo.class);

                    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);// This flag ensures all activities on top of the CloseAllViewsDemo are cleared.

                    context.startActivity(intent);

            }

        });

    }

}

main2.xml

?

<?xml version="1.0" encoding="utf-8"?>

<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="This is the second activity. The button click will clear the stack. click the Backbutton to see."

    />

<Button

    android:text="Go to First Activity without closing"

    android:id="@+id/Button01"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

</Button>

</LinearLayout>

The AndroidManifest.xml

?

<?xml version="1.0" encoding="utf-8"?>

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

      package="pack.coderzheaven"

      android:versionCode="1"

      android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".CloseAllViewsDemo"

                  android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    <activity android:name=".Second"

                  android:label="@string/app_name" />

    </application>

</manifest>

After coming back to the first activity from second Activity, hit the backbutton to see if any other activities are below. If there is an activity then you will be taken to that activity, otherwise your application will close.

Placing Controls in a Widget in Android and Listening to the events from them.

2012-07-23T10:31:00.001+05:30

I have already shown how to create a simple widget and add it to the home screen in my previous posts.

I am proceeding the same as the previous tutorials.
First I will create a new project named “ControlsInWidget” and name the activity “MyActivity.java”.
Now we will create a layout for this main activity. settings.xml
These are the contents of settings.xml

?

<TableLayout android:id="@+id/TableLayout01"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

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

<TextView android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:id="@+id/tv1"

    android:text="CoderzHeaven Widget Settings Activity"

    android:textColor="@android:color/white"

    android:textSize="15dip"

    android:textStyle="bold"

    android:layout_marginTop="5dip"/>

</TableLayout>

This is the MyActivity. java that uses “settings.xml”

package com.coderzheaven.widgetpack;

import android.app.Activity;

import android.os.Bundle;

public class MyActivity extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.settings);

    }   

}

Now we will create the class for the widget which is named “MyWidget.java”.
please follow the instructions in the link while creating this class for the widget.
How to create a widget in android?
Now replace the contents inside MyWidget.java with this one.

?

package com.coderzheaven.widgetpack;

import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.appwidget.AppWidgetManager;

import android.appwidget.AppWidgetProvider;

import android.content.Context;

import android.content.Intent;

import android.util.Log;

import android.widget.RemoteViews;

public class MyWidget extends AppWidgetProvider {

    public static String WIDGET_SETTINGS_ACTION = "SettingsForWidget";

    public static String WIDGET_RECEIVER_ACTION = "WidgetActionReceiver";

    @Override

    public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {

        Log.d("DEBUG","onUpdate");

        RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.main);

        Intent configIntent = new Intent(context, MyActivity.class);

        configIntent.setAction(WIDGET_SETTINGS_ACTION);

        Intent active = new Intent(context, MyWidget.class);

        active.setAction(WIDGET_RECEIVER_ACTION);

        active.putExtra("Message", "Message for Button 1");

        PendingIntent actionPendingIntent = PendingIntent.getBroadcast(context, 0, active, 0);

        PendingIntent configPendingIntent = PendingIntent.getActivity(context, 0, configIntent, 0);

        remoteViews.setOnClickPendingIntent(R.id.button_one, actionPendingIntent);

        remoteViews.setOnClickPendingIntent(R.id.button_two, configPendingIntent);

        appWidgetManager.updateAppWidget(appWidgetIds, remoteViews);

    }

    @Override

    public void onReceive(Context context, Intent intent) {

        final String action = intent.getAction();

        if (AppWidgetManager.ACTION_APPWIDGET_DELETED.equals(action)) {

            final int appWidgetId = intent.getExtras().getInt(

            AppWidgetManager.EXTRA_APPWIDGET_ID,

            AppWidgetManager.INVALID_APPWIDGET_ID);

        if (appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {

            this.onDeleted(context, new int[] { appWidgetId });

            }

        } else {

        // check, if our Action was called

        if (intent.getAction().equals(WIDGET_RECEIVER_ACTION)) {

            String msg = "";

            try {

                msg = intent.getStringExtra("Message");

            } catch (NullPointerException e) {

                Log.e("Error", "No Message");

            }

            PendingIntent contentIntent = PendingIntent.getActivity(context, 0, intent, 0);

            NotificationManager notificationManager = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);

            Notification noty = new Notification(R.drawable.icon, "Button in the Widget Clicked.",System.currentTimeMillis());

            noty.setLatestEventInfo(context, "Notification from Widget", msg, contentIntent);

            notificationManager.notify(1, noty);

        }

        super.onReceive(context, intent);

        }

    }

}

Here we have two actions “WIDGET_SETTINGS_ACTION” and “WIDGET_RECEIVER_ACTION” which will be set as action for the two buttons inside the widget.
Now here is the main.xml which is the layout for the widget that contains the controls.

?

<?xml version="1.0" encoding="utf-8"?>

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

    android:layout_width="fill_parent"

    android:orientation="horizontal"

    android:background="@drawable/yellow_bkg"

    android:layout_gravity="center"

    android:layout_height="wrap_content">

<Button

    android:text="Button1"

    android:id="@+id/button_one"

    android:layout_weight="1"

    android:layout_gravity="center_horizontal|center"

    android:layout_height="fill_parent"

    android:layout_width="fill_parent"/>

<Button

    android:text="Button2"

    android:id="@+id/button_two"

    android:layout_weight="1"

    android:layout_gravity="center_horizontal|center"

    android:layout_height="fill_parent"

    android:layout_width="fill_parent"/>

</LinearLayout>

If you want the time to be updated every second, your have to modify simple_widget.xml
file and set updatePerdiodMillis to 1000.
The android update 1.6 unfortunately does not support any update periode that is less then 30
minutes.
Please go through this tutorial for setting up the xml for the widget.
How to create a widget in android?
Inside the onReceive we are checking this to ensure which button is clicked. You can write anything inside this function – like a http call or something to update the widget.

if (intent.getAction().equals(WIDGET_RECEIVER_ACTION)) {
}

The second button in the widget launches the activity “MyActivity” and the first one send a notification and doesn’t have a user interface.

Send Data when Clicking on a Notification in Android?

2012-07-23T10:27:00.002+05:30

Now today I am going to show how to send data when you click on the notification message.
Here I am creating two activities. One the main activity that creates the notification and the other one is used when you click on the notification.
i.e the second activity is called when you click on the notification.
Here is the main activity that sends the notification.
NotificationDemo .java

?

package com.coderzheaven.pack;

import android.app.Activity;

import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.content.Context;

import android.content.Intent;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

import android.widget.Toast;

public class NotificationDemo extends Activity implements View.OnClickListener{

    private Button buttonSend, clear;

    private static final int NOT_ID = 1;

    @Override

    public void onCreate(Bundle savedInstanceState) {

      super.onCreate(savedInstanceState);

      setContentView(R.layout.main);

      buttonSend = (Button) this.findViewById( R.id.send);

      clear = (Button) this.findViewById( R.id.cancel);

      buttonSend.setOnClickListener(this);

      clear.setOnClickListener(this);

    }

    @Override

    public void onClick(View v) {

        String ns = Context.NOTIFICATION_SERVICE;

        NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);

        if(v == buttonSend){

            int icon = R.drawable.icon;

            CharSequence tickerText = "Hello ";

            long when = System.currentTimeMillis();

            int requestID = (int) System.currentTimeMillis();

            Notification notification = new Notification(icon, tickerText, when);

            Context context = getApplicationContext();

            Intent notificationIntent = new Intent(this, GoToNotification.class);

            notificationIntent.putExtra("data1", "My Data 1");

            notificationIntent.putExtra("data2", "My Data 2");

            notificationIntent.setAction("myString"+ requestID);

            PendingIntent contentIntent = PendingIntent.getActivity(this, requestID, notificationIntent, 0);

            notificationIntent.setData((Uri.parse("mystring"+requestID)));

                    notification.setLatestEventInfo(context, "Notification Demo", requestID + "", contentIntent);

                    notification.flags += Notification.FLAG_ONGOING_EVENT;

                    notification.flags += Notification.FLAG_AUTO_CANCEL;

                mNotificationManager.notify(NOT_ID, notification);

        }else{

            Toast.makeText(getApplicationContext(),"Cancelling", Toast.LENGTH_SHORT).show();

            mNotificationManager.cancel(NOT_ID);

        }

    }

}

The main.xml that creates the layout for the above activity.

?

<?xml version="1.0" encoding="utf-8"?>

<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="@string/hello"

    />

<Button

    android:text="Send Notification"

    android:id="@+id/send"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

</Button>

<Button

    android:text="Cancel Notification"

    android:id="@+id/cancel"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

</Button>

</LinearLayout>

Now the second activity that is called when you click on the notification.

?

package com.coderzheaven.pack;

import android.app.Activity;

import android.os.Bundle;

import android.widget.TextView;

public class GoToNotification extends Activity{

    TextView tv = null;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        System.out.println("onCreate");

        setContentView(R.layout.notification);

        tv = (TextView)findViewById(R.id.tv);

        Bundle extras = getIntent().getExtras();

        if(extras != null){

            String data1 = extras.getString("data1");

            String data2 = extras.getString("data2");

            System.out.println("Ddata1 : " + data1);

            tv.setText("Data Sent from Clicking Notification nData 1 : " + data1 + "nData 2 : " + data2);

        }

    }

}

This is the layout for the second activity.
It simply contains a textview to show the passed data.

?

<?xml version="1.0" encoding="utf-8"?>

<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="@string/hello"

    android:id="@+id/tv"

    />

</LinearLayout>

Also declare the activity in the manifest.xml

?

<?xml version="1.0" encoding="utf-8"?>

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

      package="com.coderzheaven.pack"

      android:versionCode="1"

      android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".NotificationDemo"

                  android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

     <activity android:name=".GoToNotification"

                  android:label="@string/app_name" />

    </application>

</manifest>

Using NotificationManager in ANDROID for showing notification, sample code.

2012-07-23T10:25:00.000+05:30

Multiple Notifications are a unique feature in ANDROID phones. This tutorial will show you how to create notification from your application.
ANDROID uses the NotificationManager class to create the notification.
Let’s look at the code.

?

package com.Webviews;

import android.app.Activity;

import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.content.Context;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class NotificationActivity  extends Activity implements View.OnClickListener {

private Button button, clear;

private NotificationManager mManager;

private static final int APP_ID = 0;

@Override

public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.main);

  button = (Button) this.findViewById( R.id.my_button);

  clear = (Button) this.findViewById( R.id.cancel);

  clear.setOnClickListener(new OnClickListener() {

    @Override

    public void onClick(View arg0) {

        mManager.cancel(APP_ID);

    }

  });

  button.setOnClickListener(this);

  mManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

}

@Override

public void onClick(View v) {

  Intent intent = new Intent(this,NotificationActivity.class);

  Notification notification = new Notification(R.drawable.icon,"Notification!!", System.currentTimeMillis());

  notification.setLatestEventInfo(NotificationActivity.this,"Send by which application","Description of the notification",

                                  PendingIntent.getActivity(this.getBaseContext(), 0, intent,

                                  PendingIntent.FLAG_NO_CREATE));

  mManager.notify(APP_ID, notification);

}

}

Explanation.

mManager.notify(APP_ID, notification);
This line in the code sends the notification where notification is the object of the Notification class where you can set the data and title for the notification.
This line will cancel the notification created by this application.
mManager.cancel(APP_ID);
The layout file for the above code “main.xml”

<?xml version="1.0" encoding="utf-8"?>

<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="@string/hello"

    />

<Button

    android:text="Send Notification"

    android:id="@+id/my_button"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

</Button>

<Button

    android:text="Cancel Notification"

    android:id="@+id/cancel"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content">

</Button>

</LinearLayout>

Fling Gesture in Android

2012-07-23T10:22:00.001+05:30

On implementing the onGestureListener you can get the events like

Fling
LongPress
Scroll
ShowPress
SingleTap

Its really simple, otherwise we have to calculate the distance between the touchdown and touchup event to check a fling event is happened or not.

import android.app.Activity;

import android.os.Bundle;

import android.view.GestureDetector;

import android.view.MotionEvent;

import android.view.View;

import android.view.Window;

import android.view.WindowManager;

import android.view.GestureDetector.OnGestureListener;

import android.view.GestureDetector.SimpleOnGestureListener;

import android.view.LayoutInflater.Filter;

import android.view.View.OnClickListener;

import android.widget.Toast;

public  class FlingActivity extends Activity implements OnGestureListener

{

    private GestureDetector gestureScanner;

    @Override

    public void onCreate(Bundle savedInstanceState)

    {

        super.onCreate(savedInstanceState);

        requestWindowFeature(Window.FEATURE_NO_TITLE);

        gestureScanner = new GestureDetector(this);

        setContentView(R.layout.main);

    }

    @Override

    public boolean onTouchEvent(MotionEvent me)

    {

        return gestureScanner.onTouchEvent(me);

    }

    public boolean onDown(MotionEvent e)

    {

        Toast.makeText(FlingActivity.this, "Motion Event", Toast.LENGTH_LONG).show();

        return false;

    }

    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY)

    {

        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);

        Toast.makeText(FlingActivity.this, "fling Event ", Toast.LENGTH_LONG).show();

        return true;

    }

    public void onLongPress(MotionEvent e)

    {

        Toast.makeText(FlingActivity.this, "Long-Press event", Toast.LENGTH_LONG).show();

    }

    public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY)

    {

        Toast.makeText(FlingActivity.this, "Scroll event", Toast.LENGTH_LONG).show();

        return false;

    }

    public void onShowPress(MotionEvent e)

    {

        Toast.makeText(FlingActivity.this, "Show-Press event", Toast.LENGTH_LONG).show();

    }

    public boolean onSingleTapUp(MotionEvent e)

    {

        Toast.makeText(FlingActivity.this, "Single-Tap event ", Toast.LENGTH_LONG).show();

        return true;

    }

}

How to setUp a repeating Alarm in Android?

2012-07-23T10:21:00.000+05:30

Today I am going to show you how to set up a repeating alarm in android. In the previous post I showed you how to set up a simple alarm. An in this post I will show you how to set Up a Repeating Alarm.

For this you need an extra class just to notify that the repeating alarm is called.
Let’a look at the java code.

?

package pack.coderzheaven;

import java.util.Calendar;

import android.app.Activity;

import android.app.AlarmManager;

import android.app.PendingIntent;

import android.content.Intent;

import android.os.Bundle;

import android.os.SystemClock;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class AlarmDemo extends Activity {

    Toast mToast;

      @Override

        protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.main);

            Button button = (Button)findViewById(R.id.one_shot);

            button.setOnClickListener(mOneShotListener);

            button = (Button)findViewById(R.id.start_repeating);

            button.setOnClickListener(mStartRepeatingListener);

            button = (Button)findViewById(R.id.stop_repeating);

            button.setOnClickListener(mStopRepeatingListener);

        }

        private OnClickListener mOneShotListener = new OnClickListener() {

            public void onClick(View v) {

                Intent intent = new Intent(AlarmDemo.this, MyAlarmReceiver.class);

                PendingIntent sender = PendingIntent.getBroadcast(AlarmDemo.this,

                        0, intent, 0);

                // We want the alarm to go off 10 seconds from now.

                Calendar calendar = Calendar.getInstance();

                calendar.setTimeInMillis(System.currentTimeMillis());

                calendar.add(Calendar.SECOND, 10);

                // Schedule the alarm!

                AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);

                am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);

                // Tell the user about what we did.

                if (mToast != null) {

                    mToast.cancel();

                }

                mToast = Toast.makeText(AlarmDemo.this,"Alarm Started",

                        Toast.LENGTH_LONG);

                mToast.show();

            }

        };

        private OnClickListener mStartRepeatingListener = new OnClickListener() {

            public void onClick(View v) {

                Intent intent = new Intent(AlarmDemo.this, RepeatingAlarm.class);

                PendingIntent sender = PendingIntent.getBroadcast(AlarmDemo.this,

                        0, intent, 0);

                // We want the alarm to go off 5 seconds from now.

                long firstTime = SystemClock.elapsedRealtime();

                firstTime += 5*1000;

                // Schedule the alarm!

                AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);

                am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,

                                firstTime, 5*1000, sender);

                // Tell the user about what we did.

                if (mToast != null) {

                    mToast.cancel();

                }

                mToast = Toast.makeText(AlarmDemo.this, "Rescheduled",

                        Toast.LENGTH_LONG);

                mToast.show();

            }

        };

        private OnClickListener mStopRepeatingListener = new OnClickListener() {

            public void onClick(View v) {

                // Create the same intent, and thus a matching IntentSender, for

                // the one that was scheduled.

                Intent intent = new Intent(AlarmDemo.this, RepeatingAlarm.class);

                PendingIntent sender = PendingIntent.getBroadcast(AlarmDemo.this,

                        0, intent, 0);

                // And cancel the alarm.

                AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);

                am.cancel(sender);

                // Tell the user about what we did.

                if (mToast != null) {

                    mToast.cancel();

                }

                mToast = Toast.makeText(AlarmDemo.this,"Repeating Alarm Unscheduled.",

                        Toast.LENGTH_LONG);

                mToast.show();

            }

        };

    }

Here we have three buttons one to set up a simple Alarm that is a one shot alarm and other button is for starting a repeating alarm and the third button for stopping the repeating alarm.
Now let’s see how the layout looks like.

<?xml version="1.0" encoding="utf-8"?>

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

    android:orientation="vertical" android:padding="4dip"

    android:gravity="center_horizontal"

    android:layout_width="fill_parent" android:layout_height="fill_parent">

    <TextView

        android:layout_width="fill_parent" android:layout_height="wrap_content"

        android:layout_weight="0"

        android:paddingBottom="4dip"

        android:text="Alarm Demo from CoderzHeaven"/>

    <Button android:id="@+id/one_shot"

        android:layout_width="wrap_content" android:layout_height="wrap_content"

        android:text="Start Alarm">

        <requestFocus />

    </Button>

    <Button android:id="@+id/start_repeating"

        android:layout_width="wrap_content" android:layout_height="wrap_content"

        android:text="Start Repeating Alarm" />

     <Button android:id="@+id/stop_repeating"

        android:layout_width="wrap_content" android:layout_height="wrap_content"

        android:text="Stop Repeating Alarm" />

</LinearLayout>

Now create a new class named “RepeatingAlarm.java” and copy this code into it. This class receives the repeating alarm intent.
The “MyAlarmReceiver.java” file is included in this post. Please copy that also

?

package pack.coderzheaven;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.widget.Toast;

public class RepeatingAlarm extends BroadcastReceiver

{

    @Override

    public void onReceive(Context context, Intent intent)

    {

        Toast.makeText(context,"Repeating Alarm Received", Toast.LENGTH_SHORT).show();

    }

}

Here is the AndroidManifest file

?

<?xml version="1.0" encoding="utf-8"?>

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

      package="pack.coderzheaven"

      android:versionCode="1"

      android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".AlarmDemo"

                  android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    <receiver android:name=".MyAlarmReceiver" android:process=":remote" />

    <receiver android:name=".RepeatingAlarm" android:process=":remote" />

    </application>

</manifest>

Now run it and see the result.

How to use Alarm Service in android?

2012-07-23T10:19:00.000+05:30

Today in this tutorial I will show you how to use AlarmService in android.
For this you have to first create a project named AlarmDemo and copy this code into it.

?

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.Toast;

public class AlarmDemo extends Activity {

    Toast mToast;

      @Override

        protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.main);

            Button button = (Button)findViewById(R.id.one_shot);

            button.setOnClickListener(mOneShotListener);

        }

        private OnClickListener mOneShotListener = new OnClickListener() {

            public void onClick(View v) {

                Intent intent = new Intent(AlarmDemo.this, MyAlarmReceiver.class);

                PendingIntent sender = PendingIntent.getBroadcast(AlarmDemo.this,

                        0, intent, 0);

                // We want the alarm to go off 10 seconds from now.

                Calendar calendar = Calendar.getInstance();

                calendar.setTimeInMillis(System.currentTimeMillis());

                calendar.add(Calendar.SECOND, 10);

                // Schedule the alarm!

                AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);

                am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);

                // Tell the user about what we did.

                if (mToast != null) {

                    mToast.cancel();

                }

                mToast = Toast.makeText(AlarmDemo.this,"Alarm Started",

                        Toast.LENGTH_LONG);

                mToast.show();

            }

        };

}

We use the AlarmManager class for creating an Alarm service.
Here we are setting the time to 10 seconds so after 10 seconds a Toast pops up.
For receiving the Broadcast we have to create a class the extends the BroadcastReceiver class on which the onReceive function gets called when the service ends.
So create a class named “MyAlarmReceiver.java” and copy this code into it.

package pack.coderzheaven;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.widget.Toast;

public class MyAlarmReceiver extends BroadcastReceiver

{

    @Override

    public void onReceive(Context context, Intent intent)

    {

        Toast.makeText(context, "Alarm Received after 10 seconds.", Toast.LENGTH_SHORT).show();

    }

}

This is the layout file main.xml

?

<?xml version="1.0" encoding="utf-8"?>

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

    android:orientation="vertical" android:padding="4dip"

    android:gravity="center_horizontal"

    android:layout_width="fill_parent" android:layout_height="fill_parent">

    <TextView

        android:layout_width="fill_parent" android:layout_height="wrap_content"

        android:layout_weight="0"

        android:paddingBottom="4dip"

        android:text="Alarm Demo"/>

    <Button android:id="@+id/one_shot"

        android:layout_width="wrap_content" android:layout_height="wrap_content"

        android:text="Start Alarm">

        <requestFocus />

    </Button>

</LinearLayout>

This class will be called after 10 seconds.
Now the important thing for receiving the Brodcast events you have to register with the AndroidManifest.

This is the AndroidManifest file for the above code

?

<?xml version="1.0" encoding="utf-8"?>

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

      package="pack.coderzheaven"

      android:versionCode="1"

      android:versionName="1.0">

    <application android:icon="@drawable/icon" android:label="@string/app_name">

        <activity android:name=".AlarmDemo"

                  android:label="@string/app_name">

            <intent-filter>

                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />

            </intent-filter>

        </activity>

    <receiver android:name=".MyAlarmReceiver" android:process=":remote" />

    </application>

</manifest>

Alarm Demo

How to check different Network status in Android?

2012-07-23T10:17:00.000+05:30

This code snippet checks which of your networks are available in android.

package com.coderzheaven.pack;

import android.app.Activity;

import android.content.Context;

import android.net.ConnectivityManager;

import android.os.Bundle;

import android.widget.Toast;

public class CheckConnectionsDemo extends Activity {

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        checkAvailableConnection();

    }

    void checkAvailableConnection()

    {

        ConnectivityManager connMgr = (ConnectivityManager)

        this.getSystemService(Context.CONNECTIVITY_SERVICE);    

        final android.net.NetworkInfo wifi =

        connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);  

        final android.net.NetworkInfo mobile =

        connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

        if( wifi.isAvailable() ){

            Toast.makeText(this, "Wifi Available" , Toast.LENGTH_LONG).show();

        }

        else if( mobile.isAvailable() ){

            Toast.makeText(this, "3G Available" , Toast.LENGTH_LONG).show();

        }

        else{   

            Toast.makeText(this, "No Network Available" , Toast.LENGTH_LONG).show();

        }

    }

}

How to use Calendar in Android?

2012-07-23T10:16:00.000+05:30

Hello all…….
In today’s post I will show you how to use Calendar in android. Actually it is really easy to use calendar in android.
For that android provides a calendar widget.
We use calendar class to show the Calendar widget.
Here is the java source code for this example.

?

package com.coderzheaven.pack;

import java.util.Calendar;

import android.app.Activity;

import android.app.DatePickerDialog;

import android.app.Dialog;

import android.graphics.Color;

import android.os.Bundle;

import android.view.MotionEvent;

import android.view.View;

import android.widget.Button;

import android.widget.DatePicker;

import android.widget.EditText;

public class CalendarTestDemo extends Activity {

    String arrayMonth[] = {"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sept","Oct","Nov","Dec"};

    Button date_button;

    static final int DATE_DIALOG_ID = 0;

    private int mYear;

    private int mMonth;

    private int mDay;

    EditText date_;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        date_ = (EditText)findViewById(R.id.EditText01);

        date_.setTextColor(Color.RED);

        date_button = (Button)findViewById(R.id.Button01);

        date_button.setOnTouchListener(new View.OnTouchListener() {

            public boolean onTouch(View v, MotionEvent event)

            {

                showDialog(DATE_DIALOG_ID);

                return false;

            }

        });

        // get the current date

        final Calendar c = Calendar.getInstance();

        mYear = c.get(Calendar.YEAR);

        mMonth = c.get(Calendar.MONTH);

        mDay = c.get(Calendar.DAY_OF_MONTH);

        // display the current date (this method is below)

        updateDisplay();

    }

    private void updateDisplay() {

        date_.setText(

                new StringBuilder()

                        // Month is 0 based so add 1

                        .append(arrayMonth[mMonth]).append(" ")

                        .append(mDay).append(" ")

                        .append(mYear).append(" "));

    }

    private DatePickerDialog.OnDateSetListener mDateSetListener =

        new DatePickerDialog.OnDateSetListener() {

            public void onDateSet(DatePicker view, int year,

                                  int monthOfYear, int dayOfMonth) {

                mYear = year;

                mMonth = monthOfYear;

                mDay = dayOfMonth;

                updateDisplay();

            }

        };

        @Override

        protected Dialog onCreateDialog(int id) {

            switch (id) {

            case DATE_DIALOG_ID:

                return new DatePickerDialog(this,

                            mDateSetListener,

                            mYear, mMonth, mDay);

            }

            return null;

        }

}

This is the main.xml for the layout for the above java code.

?

<?xml version="1.0" encoding="utf-8"?>

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

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:layout_margin="10dp">

    >

    <TextView

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:text="Calendar Demo from Coderzheaven"

        android:layout_margin="10dp"

        />

    <EditText

        android:text=""

        android:id="@+id/EditText01"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_margin="10dp">

    </EditText>

    <Button

        android:text="Show Calendar"

        android:id="@+id/Button01"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_marginLeft="10dp">

    </Button>

</LinearLayout>

How to get the current progress on your SeekBar in android?

2012-07-23T10:13:00.003+05:30

I have already shown how to use seekBar in android.
This simple snippet helps you to get the current progress in the seekbar.
It’s same code from this post, only thing is I added the getProgress method.

package com.coderzheaven;

<span class="IL_AD" id="IL_AD5">import</span> android.app.Activity;

import android.os.Bundle;

import android.widget.SeekBar;

import android.widget.TextView;

public <span class="IL_AD" id="IL_AD3">class</span> SeekBarDemo extends Activity  implements SeekBar.OnSeekBarChangeListener {

    SeekBar mSeekBar;

    TextView mProgressText;

    TextView mTrackingText;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        mSeekBar = (SeekBar)findViewById(R.id.<span class="IL_AD" id="IL_AD7">seek</span>);

        int p = mSeekBar.getProgress();

        System.out.println("Current Progress = " + p);

        mSeekBar.setOnSeekBarChangeListener(this);

        mProgressText = (TextView)findViewById(R.id.progress);

        mTrackingText = (TextView)findViewById(R.id.<span class="IL_AD" id="IL_AD1">tracking</span>);

    }

    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {

        mProgressText.setText(progress + " " +

                getString(R.string.seekbar_from_touch) + "=" + fromTouch);

        System.out.println("onProgressChanged >> Current Progress = " + progress);

    }

    public void onStartTrackingTouch(SeekBar seekBar) {

        mTrackingText.setText(getString(R.string.seekbar_tracking_on));

    }

    public void onStopTrackingTouch(SeekBar seekBar) {

        mTrackingText.setText(getString(R.string.seekbar_tracking_off));

    }

}

How to use SeekBar in ANDROID?

2012-07-23T10:12:00.002+05:30

Here is a simple example to show how to use seek Bar in android.
Create a new project and place this code in it.

package com.coderzheaven;

<span class="IL_AD" id="IL_AD3">import</span> android.app.Activity;

import android.os.Bundle;

import android.widget.SeekBar;

import android.widget.TextView;

public <span class="IL_AD" id="IL_AD4">class</span> SeekBarDemo extends Activity  implements SeekBar.OnSeekBarChangeListener {

    SeekBar mSeekBar;

    TextView mProgressText;

    TextView mTrackingText;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        mSeekBar = (SeekBar)findViewById(R.id.<span class="IL_AD" id="IL_AD5">seek</span>);

        mSeekBar.setOnSeekBarChangeListener(this);

        mProgressText = (TextView)findViewById(R.id.progress);

        mTrackingText = (TextView)findViewById(R.id.<span class="IL_AD" id="IL_AD1">tracking</span>);

    }

    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromTouch) {

        mProgressText.setText(progress + " " +

                getString(R.<span class="IL_AD" id="IL_AD9">string</span>.seekbar_from_touch) + "=" + fromTouch);

    }

    public void onStartTrackingTouch(SeekBar seekBar) {

        mTrackingText.setText(getString(R.string.seekbar_tracking_on));

    }

    public void onStopTrackingTouch(SeekBar seekBar) {

        mTrackingText.setText(getString(R.string.seekbar_tracking_off));

    }

}

The main.xml file

?

<?xml version="1.0" encoding="utf-8"?>

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

    android:<span class="IL_AD" id="IL_AD6">orientation</span>="<span class="IL_AD" id="IL_AD7">vertical</span>"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent">

    <SeekBar android:id="@+id/seek"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:max="100"

        android:progress="50"

        android:secondaryProgress="75" />

    <TextView android:id="@+id/progress"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content" />

    <TextView android:id="@+id/tracking"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content" />

</LinearLayout>

The strings.xml file.

?

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="app_name">SeekBarDemo</string>

    <string name="seekbar_tracking_on">Tracking on</string>

    <string name="seekbar_tracking_off">Tracking off</string>

    <string name="seekbar_from_touch">from touch</string>

</resources>

SeekBar Demo in ANDROID

How to get NSPopUpButton Selected Item Name ?

2012-07-23T10:08:00.002+05:30

In order to get the selected item name from an NSPopUpButton using in any iOS application, use the following sample of code.

NSPopUpButtonCell *urCell = [sender selectedCell];

NSLog (@"Item name in the cell is %@", urCell.title);

Creating a custom Sliding GalleryView with Paging in android

2012-07-23T09:25:00.001+05:30

This is a simple example showing A sliding Gallery in android. This example shows a sliding gallery with a paging Control and a changing page text which also indicate the page change.
Create a new project named “SlidingGallery” and copy this code into “SlidingGalleryDemo.java“.
My Activity name is “SlidingGalleryDemo.java” here

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

package com.coderzheaven.pack;

import android.app.Activity;

import android.content.Context;

import android.os.Bundle;

import android.util.DisplayMetrics;

import android.view.Gravity;

import android.view.View;

import android.view.ViewGroup;

import android.widget.AdapterView;

import android.widget.BaseAdapter;

import android.widget.Gallery;

import android.widget.ImageView;

import android.widget.LinearLayout;

import android.widget.TextView;

import android.widget.AdapterView.OnItemClickListener;

public class SlidingGalleryDemo extends Activity {

    Gallery ga;

    int width, height;

    LinearLayout linear;

    LinearLayout layout;

    Integer[] pics = {

            R.drawable.android_1,

            R.drawable.android_2,

            R.drawable.android_3,

            R.drawable.android_4,

            R.drawable.android_5   

    };

    ImageView paging;

    @Override

    public void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.threemenu);

         layout = (LinearLayout) findViewById(R.id.imageLayout1);

         DisplayMetrics displaymetrics = new DisplayMetrics();

         getWindowManager().getDefaultDisplay().getMetrics(displaymetrics);

         width = displaymetrics.heightPixels;

         height = displaymetrics.widthPixels;

         for(int i=0; i<pics.length; i++)

         {

            paging = new ImageView(this);

            paging.setId(i);

            paging.setBackgroundResource(R.drawable.unsel);

            layout.addView(paging);

         }

         ga = (Gallery)findViewById(R.id.thisgallery);

         ga.setAdapter(new ImageAdapter(this));

         ga.setOnItemClickListener(new OnItemClickListener() {

                public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) 

                {                   

                    System.out.println("SELECTED : " + arg2);

                }               

            });

    }

    public class ImageAdapter extends BaseAdapter {

        private Context ctx;

        int imageBackground;

        int pre=-1;

        public ImageAdapter(Context c) {

            ctx = c;

        }

        public int getCount() {

            return pics.length;

        }

        public View getView(int arg0, View convertView, ViewGroup arg2) {

             ImageView iv;

             LinearLayout layoutnew = new LinearLayout(getApplicationContext());            

             layoutnew.setOrientation(LinearLayout.VERTICAL);

             if (convertView == null) 

             {

                iv = new ImageView(ctx);

                iv.setImageResource(pics[arg0]);

                iv.setScaleType(ImageView.ScaleType.FIT_XY);

                int temp =(int) (height/1.7f);

                int temp_y = (int) ((3*temp)/2.0f);

                iv.setLayoutParams(new Gallery.LayoutParams(temp,temp_y));

                iv.setBackgroundResource(imageBackground);

             }

             else

             {

                iv = (ImageView) convertView;

             }

             TextView tv = new TextView(ctx);

             tv.setText("Page " + (arg0+1));

             tv.setTextColor(0xFFFFFFFF);

             tv.setPadding(0, 15, 0, 0);

             tv.setTextSize(18);

             tv.setGravity(Gravity.CENTER); 

             layoutnew.addView(iv);

             layoutnew.addView(tv);

            return layoutnew;

        }

        @Override

        public Object getItem(int position) {

            return null;

        }

        @Override

        public long getItemId(int position) {

            if(pre !=-1)

            {

                ImageView img = (ImageView) findViewById(pre);

                img.setBackgroundResource(R.drawable.unsel);

            }

            ImageView img1 = (ImageView) findViewById(position);

            img1.setBackgroundResource(R.drawable.sel);

            this.pre = position;

            return position;

        }

    }

}

Now create a new class and name it “GalleryCustom.java” which extends “Gallery” and copy this code into it.

package com.coderzheaven.pack;

import android.content.Context;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.widget.Gallery;

public class GalleryCustom extends Gallery {

    public GalleryCustom(Context ctx, AttributeSet attrSet) 

    {

        super(ctx,attrSet);

    }

    @SuppressWarnings("unused")

    private boolean isScrollingLeft(MotionEvent e1, MotionEvent e2)

    { 

           return e2.getX() > e1.getX(); 

    }

    @Override

    public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY){

      return true;  

    }

}

Now we will create the layout for the page. Copy this code to the main.xml.

<?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:keepScreenOn="true" 

    android:background="@drawable/Hotpink">

    <LinearLayout

        android:layout_width="fill_parent"

        android:id="@+id/imageLayout1"

        android:layout_marginBottom="5dip"

        android:layout_alignParentBottom="true"

        android:gravity="center_horizontal|center_vertical"

        android:orientation="horizontal"

        android:layout_height="wrap_content">  

     </LinearLayout>

    <LinearLayout

        android:layout_width="fill_parent"

        android:id="@+id/imageLayout"

        android:gravity="center"

        android:layout_alignParentTop="true"

        android:layout_above="@+id/imageLayout"

        android:layout_height="fill_parent" >

        <com.coderzheaven.pack.GalleryCustom

            android:id="@+id/thisgallery"

            android:spacing="60dip"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content" />

    </LinearLayout>

</RelativeLayout>

OK Its done. Now run the project and see the result.

Digital Clock Widget in Android.

2012-07-23T09:22:00.000+05:30

Digital Clock is a very useful widget in android to show time in your application.
Here is a simple demo on using digital Clock widget.
First In the layout file copy this file.

<?xml version="1.0" encoding="utf-8"?>

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

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:gravity="center|center_vertical"

    android:background="@drawable/android_3"

    >

<DigitalClock

    android:text="Digital Clock"

    android:id="@+id/DigitalClock01"

    android:layout_width="wrap_content"

    android:layout_height="wrap_content"

    android:background="@drawable/header_bg"

    android:gravity="center|center_vertical"

    android:layout_gravity="center|center_vertical"

    android:layout_margin="10dp">

</DigitalClock>

</LinearLayout>

This creates a digital clock widget in the UI which will automatically update the time from the device.
Now in the java file you can reference it like this.
Since Digital Clock extends TextView you can apply every methods that you apply on a TextView.

?

DigitalClock dg;

dg = (DigitalClock)findViewById(R.id.DigitalClock01);

dg.setTextColor(Color.RED);

dg.setTextSize(25f);

Styling text in ANDROID through XML

2012-07-23T09:21:00.000+05:30

Hello….
In today’s tutorial I will show you how to style your text in ANDROID.
This is a simple example to show how styling is done using XML in android.
This will also show you how to get a string from the resources in java code.
First create a new project and name it “StyleTextDemo” and copy this code into it.

?

package pack.coderzheaven;

import android.app.Activity;

import android.content.Context;

import android.content.res.Resources;

import android.os.Bundle;

import android.widget.TextView;

public class StyleTextDemo extends Activity {

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        super.onCreate(savedInstanceState);

        setContentView(R.layout.resources);

        TextView tv;

        CharSequence cs;

        String str;

        // Using the getString() conevenience method, retrieve a string

        // resource that happens to have style information.  Note the use of

        // CharSequence instead of String so we don't lose the style info.

        cs = getText(R.string.styled_text);

        tv = (TextView)findViewById(R.id.styled_text);

        tv.setText(cs);

        // Use the same resource, but convert it to a string, which causes it

        // to lose the style information.

        str = getString(R.string.styled_text);

        tv = (TextView)findViewById(R.id.plain_text);

        tv.setText(str);

        Context context = this;

        // Get the Resources object from our context

        Resources res = context.getResources();

        // Get the string resource, like above.

        cs = res.getText(R.string.styled_text);

        tv = (TextView)findViewById(R.id.res1);

        tv.setText(cs);

    }

}

Now in the “main.xml” file copy the following code. This is simply for the layout

?

<?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">

   <TextView

        android:id="@+id/coderz"

        android:text="@string/coderz"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:gravity="center_horizontal"

        android:textStyle="normal"

        android:padding="10dip"

        />

    <TextView

        android:id="@+id/styled_text"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:gravity="center_horizontal"

        android:textStyle="normal"

        />

    <TextView

        android:id="@+id/plain_text"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:gravity="center_horizontal"

        android:textStyle="normal"

        />

    <TextView

        android:id="@+id/res1"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:gravity="center_horizontal"

        android:textStyle="normal"

        />

</LinearLayout>

Now the third step in the strings.xml file, place this code.

<?xml version="1.0" encoding="utf-8"?>

<resources>

     <string name="coderz"><b><i>Style Text Demo from CoderzHeaven, Enjoy</i></b></string>

     <string name="styled_text">Plain, <b>bold</b>, <i>italic</i>, <b><i>bold-italic</i></b></string>

</resources>

You are done, Now go on and run it.
Enjoy
Please leave your comments on this post and encourage us.

Style Text Demo in android

How to use shapes in android? A simple example.

2012-07-23T09:17:00.000+05:30

In android with shapes we can create beautiful layouts.
Lets look at an example.
Create an xml named “gradient.xml” in your drawable folder and copy this code into it.

<?xml version="1.0" encoding="utf-8"?>

<shape

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

    android:shape="rectangle">

    <gradient

        android:angle="0"

        android:startColor="#000000"

        android:endColor="#000000"

        android:centerColor="#97CF4D" />

</shape>

Now the main layout file main.xml

?

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

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

    android:id="@+id/LinearLayout01"

    android:orientation="vertical"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:padding="10dp">

    <TextView

        android:text="Sample Text"

        android:id="@+id/text01"

        android:textSize="25sp"

        android:layout_margin="10dp"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content">

    </TextView>

    <View

        android:layout_width="wrap_content"

        android:background="@drawable/gradient"

        android:layout_height="1dp"></View>

   <TextView

        android:text="Sample text"

        android:id="@+id/text02"

        android:textSize="25sp"

        android:layout_margin="10dp"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content">

    </TextView>

    <View

        android:layout_width="wrap_content"

        android:background="@drawable/gradient"

        android:layout_height="1dp"></View>

    <EditText

        android:text=" "

        android:id="@+id/text03"

        android:textSize="25sp"

        android:layout_margin="10dp"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content">

    </EditText>

    <View

        android:layout_width="wrap_content"

        android:background="@drawable/gradient"

        android:layout_height="1dp"></View>

</LinearLayout>

The main java file.

?

package pack.coderzheaven;

import android.app.Activity;

import android.os.Bundle;

public class DrawableShapesDemo extends Activity {

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

    }

}

Done. You can now run the application.