ImageView iv = (ImageView)findViewById(R.id.iv);
  try {
                InputStream in = getResources().getAssets().open("webp/filename.webp");
                final FrameSequenceDrawable drawable = new FrameSequenceDrawable(in);
                drawable.setLoopCount(-1);
                drawable.setLoopBehavior(FrameSequenceDrawable.LOOP_FINITE);
                drawable.setOnFinishedListener(new FrameSequenceDrawable.OnFinishedListener() {
                    @Override
                    public void onFinished(FrameSequenceDrawable frameSequenceDrawable) {
                    }
                });
                iv.setImageDrawable(drawable);
            } catch (IOException e) {
                e.printStackTrace();
            }