Starting Frame-By-Frame Animation

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It’s important to note that the start() method called on the AnimationDrawable cannot be called during the onCreate() method of your Activity, because the AnimationDrawable is not yet fully attached to the window. If you want to play the animation immediately, without requiring interaction, then you might want to call it from the onWindowFocusChanged() method in your Activity, which will get called when Android brings your window into focus.
Very end of the page
http://developer.android.com/guide/topics/graphics/2d-graphics.html

 ImageView img = (ImageView)findViewById(R.id.some layout);
 AnimationDrawable frameAnimation =    (AnimationDrawable)img.getDrawable();
 frameAnimation.setCallback(img);
 frameAnimation.setVisible(true, true);
 frameAnimation.start();

and to add animation you can do something like 

<animation-list   android:id="@+id/my_animation" android:oneshot="false" 
    xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/frame1" android:duration="150" />
    <item android:drawable="@drawable/frame2" android:duration="150" />

 </animation-list>

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