android sendmessagedelayed takes too long

Question

I am doing a repetitive task using the UI thread's message queue. That is, in my mainActivity I am using the following block:

private Handler mHandler = new Handler() {

    @Override
    public void handleMessage(Message msg) {
    }
}

But, when I send a message from inside a callback by using

mHandler.sendEmptyMessageDelayed(what, 5);

my delay is about 20ms instead of the expected 5ms. Does anyone know why this sort of thing can happen? Is it possible to increase thread priority to solve it?

Answer 1

You can use an alternate

private Handler mHandler = new Handler() {

    @Override
    public void handleMessage(Message msg) {
      //.......
    }
}

Handler handler = new Handler();
handler.postDelayed(new Runnable() {

    @Override
    public void run() {
        mHandler.sendMessage("");
    }
}, 5000);

May be it helpful for you.