Develop Reference

Not Getting Thumb with Genres - Universal Music Player

I am using UMP example provided by Google, I have not made any change in my code, even I have not tried anything out of the box, I just imported your project into my work-space and checked it on my device, and found that I am not getting Thumb with Genres (Songs by genre) and List of Genres...
Whereas I supposed to get Thumb from our JSON, here is what I have tried (but no success) -
holder.mImageView.setImageBitmap(description.getIconBitmap());
UPDATE # 1 AS PER SUGGESTED BY #NageshSusarla here
holder.mTitleView.setText(description.getTitle());
holder.mDescriptionView.setText(description.getSubtitle());
AlbumArtCache cache = AlbumArtCache.getInstance();
Bitmap art = cache.getIconImage(url);
if (art == null) {
cache.fetch(url, new AlbumArtCache.FetchListener() {
#Override
public void onFetched(String artUrl, Bitmap bitmap, Bitmap icon) {
if (artUrl.equals(url)) {
holder.mImageView.setImageBitmap(icon);
}
}
});
} else {
holder.mImageView.setImageBitmap(bitmap);
}
holder.mImageView.setImageBitmap(description.getIconBitmap());
and getting Cannot resolve symbol 'url'

The icon bitmap may not have been set. It's best to use the AlbumartCache to fetch the icon and then set it on the imageView. The url to be passed to AlbumArtCache.getInstance().fetch(url,..) is description.getIconUri().toString()
The reason you may not be seeing it in uAmp is because of the tint being applied to it. You can remove the tint from media_list_item.xml to try out the changes.
Aside: This is indeed by design and the icon is only shown at the bottom when a user selects the item to be played.

This is by design. To keep the navigation cleaner, we decided to not
show the MediaItem icon on the local browsing UI. Other browsing UI's
may show it, like Android Auto and Android Wear.
I think you should check it in issues of android-UniversalMusicPlayer. Take a look at comment given by mangini here.
If you want to change uAmp to show the MediaDescription.getIconUri,
set the holder.mImageView at this.

Add an overlay to app icon with custom launcher

I took the following code to implement my own custom launcher:
https://github.com/fookwood/Launcher3
My goal is it to set an Bitmap or PNG file as an overlay above the normal app icon. But I can´t find the region where google is originally setting the app icon in the "All Apps View". Does somebody know where to look exactly?

Already found it by myself. For everyone who wants to know it. There´s a class called IconCache.Java.
/**
* Fill in "application" with the icon and label for "info."
*/
public synchronized void getTitleAndIcon(AppInfo application, LauncherActivityInfoCompat info,
HashMap<Object, CharSequence> labelCache) {
CacheEntry entry = cacheLocked(application.componentName, info, labelCache,
info.getUser(), false);
application.title = entry.title;
application.iconBitmap = overlay(entry.icon,BitmapFactory.decodeResource(mContext.getResources(), R.drawable.overlay_green));
//application.iconBitmap = entry.icon;
application.contentDescription = entry.contentDescription;
}

Android KitKat 4.4 TalkBack view refresh issue

I'm running my app on an Android 4.4.2 (KitKat) device.
My app has a ListView.
When I add the last item to the list view, it shows some content, and about 5 seconds later, it changes (loads a different view to that specific list item).
While TalkBack is on -
If, in that 5 seconds window, I click on the last item - the TalkBack marks it, reads it, and does not let the view change.
I do not have this issue on previous Android version.
Anyone knows why this happens? and if I can override this behavior?
Thanks!
PB

I did not find a direct solution.
I have solved the issue by overriding accessibility default behavior.
I removed the mark around the view and kept only the reading part.
This is the code I used:
view.setAccessibilityDelegate(new AccessibilityDelegate() {
#Override
public boolean performAccessibilityAction(View host, int action, Bundle args) {
//call super to perform the action
boolean ret = super.performAccessibilityAction(host, action, args);
//call super with remove-focus action to remove the mark around the view
super.performAccessibilityAction(host, AccessibilityNodeInfo.ACTION_CLEAR_ACCESSIBILITY_FOCUS, args);
return ret;
}
});

App-Icon Create an Overlayinformation (Number)?

How can I clone this behaviour (iOS) on an Android-App?
Technically its definitly possible as I have an app by my own on my Androidphone - its an Email-App with a very similiar indicator on the Icon. (shows the number of unread Emails)

yes you can implement overlay like ios.. by the way it is called badge value.
here is one sample available on github
You just have to add classes in your project and call below lines
View target = findViewById(R.id.target_view);
BadgeView badge = new BadgeView(this, target);
badge.setText("1");
badge.show();
hope it helps.

If you are referring to doing this on the home screen, that is an app widget.

Android: access "system"-drawables

I'm currently working on an app to display the battery status and I'd like to use Android-drawables instead of own images to reduce the app size.
I've found this page which lists available images and the availability for each SDK-version:http://www.fixedd.com/projects/android_drawables_display
My question: How can I access the "system"-drawables? If you click on the link and choose the tab "Status", there are some battery-drawables like "stat_sys_battery_0", but I can't access it, Eclipse doesn't offer intellisense for it and won't compile the app if I use one of those drawables.
As those drawables are part of all SDK-versions, I'd think I should be able to use them, or are those "special" drawables protected in a way so they can only be used by system-functions (and not apps)?
Any idea is appreciated.
Select0r

Hope this is what you were looking for:
private BroadcastReceiver mBatInfoReceiver = new BroadcastReceiver(){
#Override
public void onReceive(Context arg0, Intent intent) {
int level = intent.getIntExtra("level", 0);
int batteryIconId = intent.getIntExtra("icon-small", 0);
Button toolBarBattery = (Button) findViewById(R.id.toolBarButton);
LevelListDrawable batteryLevel = (LevelListDrawable) getResources().getDrawable(batteryIconId);
batteryLevel.setLevel(level);
toolBarBattery.setBackgroundDrawable(batteryLevel);
}
};

I've found another link with information that not all drawables are public. It doesn't say why some drawables would be private, but I guess I'll have to live with the fact and copy the needed images to my app.http://androiddrawableexplorer.appspot.com/
NOTE: Some of the images in the Android jar are not public and therefore cannot be directly used (you can copy them to you own application, but can't reference them via the "android" package namespace).

There actually seems to be a way to access the system icons, but it's not really working as stated in the documentation, but I'll add it in case somebody is interested:
intent.getIntExtra(BatteryManager.EXTRA_ICON_SMALL, -1)
Will get you the resource-ID of the icon that matches the current battery-status:http://developer.android.com/reference/android/os/BatteryManager.html#EXTRA_ICON_SMALL
Extra for ACTION_BATTERY_CHANGED:
integer containing the resource ID of
a small status bar icon indicating the
current battery state.
However, it always returns the same icon, no matter what the actual battery level is. Finding the icon by just trying random numbers may work, but I don't know if the IDs are consistent throughout the SKD-levels as well as different machines, so I'd rather not rely in that.