How to load AnimationDrawable from xml file

Question

I have some custom class BitmapStorage, not attached to any View or whatever - an utility one. And I have born_animation.xml file which contains with

Answer 1

Yay, I found the cause! :)

It was my bad: I didn't had the proper format of my animation.xml file:

• I didn't use android: namespace in attributes (for some reason i decided it's not required)
• I deleted "duration" attribute in <item> tags

After I fixed these things res.getDrawable() started to return a correct AnimationDrawable instance.

Had to look more precisely at Resources.NotFoundException and it's getCause() to find out what's wrong :)

Answer 2

This could be used to load resources from the "xml" directory.

Drawable myDrawable;
Resources res = getResources();
try {
   myDrawable = Drawable.createFromXml(res, res.getXml(R.xml.my_drawable));
} catch (Exception ex) {
   Log.e("Error", "Exception loading drawable"); 
}

Answer 3

Drawable

<animation-list xmlns:android="http://schemas.android.com/apk/res/android"   
                android:id="@+id/myprogress" 
                android:oneshot="false">
    <item android:drawable="@drawable/progress1" android:duration="150" />
    <item android:drawable="@drawable/progress2" android:duration="150" />
    <item android:drawable="@drawable/progress3" android:duration="150" />
</animation-list> 

Code:

ImageView progress = (ImageView)findViewById(R.id.progress_bar);
if (progress != null) {
    progress.setVisibility(View.VISIBLE);
    AnimationDrawable frameAnimation = (AnimationDrawable)progress.getDrawable();
    frameAnimation.setCallback(progress);
    frameAnimation.setVisible(true, true);
}

View

<ImageView
  android:id="@+id/progress_bar"
  android:layout_alignParentRight="true"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:src="@drawable/myprogress" />