Just in case you get something like “unable to compute hash of /intermediates/classes-proguard/release/classes.jar” – just add a few lines to the proguard-rules.pro.

-dontwarn org.apache.http.**
-dontwarn android.net.http.AndroidHttpClient
-dontwarn com.google.android.gms.**
-dontwarn com.android.volley.toolbox.**

Stack overflow thread: http://stackoverflow.com/questions/30705589/gradle-build-failure
Star google bug: https://code.google.com/p/android-developer-preview/issues/detail?id=3001

//DL

https://code.facebook.com/posts/366199913563917

http://frescolib.org/

Although you may also want to read this thread: https://news.ycombinator.com/item?id=9111849

//DL

original post: https://code.facebook.com/posts/636856646421011/shimmer-for-android/

//DL

– If somebody tells you they tested their website on Android, laugh evilly and show them this slidedeck

Awesome presentation!

//DL

What I am talking about:

Almost any serious project now has phone verification activity – it sends SMS code to the phone number and verifies the phone. What this activity should do:

• Validate phone number
• Automatically select country based on phone network or Line1 number
• Do not delete “+” before phone number
• Detect country name and draw nice country flag image
• Some countries has the same country code (like US and Canada) – good editbox shall detect this

1. Phone validation could be easily implemented with 'com.googlecode.libphonenumber:libphonenumber:6.2' library. This awesome lib can do almost anything.
2. Then we need country list. I took the country list from here, modified it and packed to assets/countries.dat file.
3. I do not remember the exact web site where I got flag pictures – but it is quite simple to write a script to download all 232 flag pictures, format it to one size and export to xxhdpi png. If you need original PSD, download it here.
4. One tricky part – do not delete “+” before phone number. I took orifginal PhoneNumberFormattingTextWatcher from android source and modified it to do so.

Source code is available here https://github.com/dlukashev/android-phone-number-with-flags – feel free to use it in your project.

//DL

Wondering where is “proguard-android.txt” in the lates ADT (rev 23)?
No worries! The universe is not collapsing. It is just a packaging bug!

https://code.google.com/p/android/issues/detail?id=72400

Download your own local copy or proguard-android.txt

Medium post about “Secret” infrastructure. It’s Google App Engine and Go! Unsurprisingly… it is created by Google Engineer:)

Read more:
https://medium.com/secret-den/demystifying-secret-12ab82fda29f

//DL

http://android-arsenal.com/

Contribute what you have in your bookmarks!:)

//DL

I’ve took a look into Foursquare code. They are using slightly modified AndroidSlidingUpPanel library. I’ve made a fork with changes (AndroidSlidingUpPanel-fork). Here’s the actual code difference.

So, show me the magic!

What we need to do:

1. Add transparent header view to the ListView in expanded state
2. Replace header view with transparent View (same height) in collapsed state – to keep ListView the same size
3. Do not intercept touches with mDragHelper when scrolling down in expanded state
4. Do not intercept touches with mDragHelper when scrolling up in expanded state and ListView is not scrolled to top position

I added new method to the SlidingUpPanelLayout to pass ListView or ScrollView and the height of Map in expanded state

mSlidingUpPanelLayout.setScrollableView(mListView, mapHeight);

Also there is a simple check for 3 and 4 placed to onInterceptTouchEvent

boolean isCanScrollUp = mSlideOffset == 0 && (y < mInitialMotionY ||
           (mScrollableView != null && mScrollableView.getChildAt(0) != null &&
                    mScrollableView.getChildAt(0).getTop() != 0));

In collapsed state you need to ignore invisible View, so replace return false; with return isDragViewUnder((int) x, (int) y); for MotionEvent.ACTION_DOWN in onTouchEvent.

For 1 and 2 set PanelSlideListener

    private void collapseMap() {
        mSpaceView.setVisibility(View.VISIBLE);
        mTransparentView.setVisibility(View.GONE);
    }

    private void expandMap() {
        mSpaceView.setVisibility(View.GONE);
        mTransparentView.setVisibility(View.INVISIBLE);
    }

    @Override
    public void onPanelSlide(View view, float v) {
    }

    @Override
    public void onPanelCollapsed(View view) {
        expandMap();
        mMap.animateCamera(CameraUpdateFactory.zoomTo(14f), 1000, null);
    }

    @Override
    public void onPanelExpanded(View view) {
        collapseMap();
        mMap.animateCamera(CameraUpdateFactory.zoomTo(11f), 1000, null);
    }

Here is the full source code https://github.com/dlukashev/AndroidSlidingUpPanel-foursquare-map-demo

enjoy

// DL

Anyway, here is an interesting picture of complete Activity Lifecycle originally posted on G+. Just found it on reddit today.

http://staticfree.info/~steve/complete_android_fragment_lifecycle.png

just in case you missed it

//DL