android 非主線程內使用Looper

package com.hoot.handler;import android.app.Activity;import android.os.Bundle;import android.os.Handler;import android.os.HandlerThread;import android.os.Looper;import android.os.Message;import android.util.Log;class LooperThread extends HandlerThread {    private static final String LOG_TAG = "RunInOtherThread";    public volatile Handler mHandler;    public LooperThread(String name) {        super(name);    }    public synchronized void waitUntilReady() {        mHandler = new Handler(getLooper(), new Handler.Callback() {            @Override            public boolean handleMessage(Message msg) {                Log.i(LOG_TAG, "Handler.Callback(), msg.what:" + msg.what + " thread id:"                        + Thread.currentThread().getId());                return false;            }        });    }}public class HandlerTest2Activity extends Activity {    static final String TAG = "Handler";    static final int HANDLER_TEST = 1;    Handler h = new Handler() {        public void handleMessage(android.os.Message msg) {            switch (msg.what) {                case HANDLER_TEST:                    Log.d(TAG, " The handler Thread id: " +                            Thread.currentThread().getId());                    break;                default:                    break;            }        };    };    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        Log.d(TAG, " The handler Thread id: " +                Thread.currentThread().getId());        LooperThread loopThread = new LooperThread("xxxxasd");        loopThread.start();        loopThread.waitUntilReady();        loopThread.mHandler.sendEmptyMessage(1);        new myThread().start();        setContentView(R.layout.main);    }    class myThread extends Thread {        @Override        public void run() {            Message msg = new Message();            msg.what = HANDLER_TEST;            h.sendMessage(msg);            Log.d(TAG, "The worker thread id = " + Thread.currentThread().getId());        }    }}

iteye上面有討論 不過給出的方法不恰當 結合stackoverflow 寫了個例子 就不解釋了

http://stackoverflow.com/questions/4838207/how-to-create-a-looper-thread-then-send-it-a-message-immediately

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