Różnica między Handler.dispatchMessage (msg) a Handler.sendMessage (msg)

Question

Apr 19, 2012, 01:39 PM

Różnica między Handler.dispatchMessage (msg) a Handler.sendMessage (msg)

kiedy używam Handler.dispatchMessage (msg), handleMessage (Wiadomość msg) będzie uruchamiany na nowym wątku, ale kiedy użyję Handler.sendMessage (msg), handleMessage (Wiadomość msg) zostanie uruchomiony w głównym wątku, który może powiedzieć mi różnica między nimi.

dzięki!

Próbny:

<code>public class MainActivity extends Activity
{
private String TAG = "MainActivity";
private Handler mHandler = new Handler()
{
    @Override
    public void handleMessage(Message msg)
    {
        Log.i(TAG, "Handler:" + Thread.currentThread().getId() + "&arg1=" + msg.arg1);
        super.handleMessage(msg);
    }

};

@Override
public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Log.i(TAG, "Main:" + Thread.currentThread().getId());
    testMethod();
}

private void testMethod()
{
    Thread thread = new Thread()
    {
        @Override
        public void run()
        {
            Log.i(TAG, "Thread:" + Thread.currentThread().getId());
            Message msg = mHandler.obtainMessage();
            msg.arg1 = 1;
            mHandler.dispatchMessage(msg);
            Message msg2 = mHandler.obtainMessage();
            msg2.arg1 = 2;
            mHandler.sendMessage(msg2);
        }

    };
    thread.start();
}
</code>

}

Wydajność:

04-19 11:32:10.452: INFO/MainActivity(774): Main:1
04-19 11:32:10.488: INFO/MainActivity(774): Thread:8
04-19 11:32:10.492: INFO/MainActivity(774): Handler:8&arg1=1
04-19 11:32:10.635: INFO/MainActivity(774): Handler:1&arg1=2