How to create a Looper thread, then send it a message immediately?

Question

I have a worker thread that sits in the background, processing messages. Something like this:

class Worker extends Thread {

    public volatile Handler hand         


        

Answer 1

    class WorkerThread extends Thread {
            private Exchanger mStartExchanger = new Exchanger();
            private Handler mHandler;
            public Handler getHandler() {
                    return mHandler;
            }
            @Override
            public void run() {
                    Looper.prepare();
                    mHandler = new Handler();
                    try {
                            mStartExchanger.exchange(null);
                    } catch (InterruptedException e) {
                            e.printStackTrace();
                    }
                    Looper.loop();
            }

            @Override
            public synchronized void start() {
                    super.start();
                    try {
                            mStartExchanger.exchange(null);
                    } catch (InterruptedException e) {
                            e.printStackTrace();
                    }
            }
    }