AnimateActivity.java 文件源码

void repeatTransition(final TransitionDrawable trans, final int timeInterval) {
        r = new Runnable() {
            @Override
            public void run() {
                if (flag) {
//                    Log.d("tagg", "straight");
                    trans.startTransition(timeInterval);
                    flag = false;
                } else {
//                    Log.d("tagg", "reverse");
                    trans.reverseTransition(timeInterval);
                    flag = true;
                }
                hand.postDelayed(this, (2*timeInterval));
            }
        };
        hand.post(r);
    }