Android查找当前获取焦点的View

new Thread(new Runnable() {
            @Override
            public void run() {
                while (true) {
                    try {
                        Thread.sleep(3000);
                    } catch (InterruptedException e) {
                        e.printStackTrace();
                    }
                    View rootview = getWindow().getDecorView();
                    View focusView = rootview.findFocus();
                    Log.i("Zachary", "===当前获取焦点的View==="+focusView.toString());
                }
            }
        }).start();