Change <layer-item> items by Java code

Question

I have the following XML:

Answer 1

Assuming that you want to have access to them through Java code after they are loaded as a Drawable in your app, you should be able to do something like the following:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    final LayerDrawable ld = (LayerDrawable) getResources().getDrawable(R.drawable.my_drawable);
    final ClipDrawable d1 = (ClipDrawable) ld.findDrawableByLayerId(R.id.customPlayerProgress);
    final ClipDrawable d2 = (ClipDrawable) ld.findDrawableByLayerId(R.id.customPlayerProgressSecondary);

    /* modify ld, d1 and d2 by calling their methods here */
}

Also look at this for some more ideas.