How to animate home button in action bar?

问题:

I'm using ActionBarSherlock and I would like to animate the home button to tell the user to click on it. I want to use three different images to show the animation.

How can I do this?

回答1:

Get the action bar in you onCreate:

ActionBar actionBar = getSupportActionBar();

Create and load an animation drawable which you defined in XML:

// homeDrawable is a field on your activity
homeDrawable = (AnimationDrawable) getResources().getDrawable(R.drawable.my_thing);

Set the drawable as the icon on the action bar:

actionBar.setIcon(homeDrawable);

Post a Runnable to start the animation when the main thread is clear:

getWindow().getDecorView().post(new Runnable() {
  @Override public void run() {
    homeDrawable.start();
  }
});

Don't forget to stop the animation at some point!