Looper、Handler进一步学习

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package com.test.looper;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;public class MainActivity extends Activity {private LooperThread  looperThread;//自己实现的带有Looper的类private HandlerThread handerThread;//使用sdk方便类，带有Looperprivate Handler handler;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        looperThread = new LooperThread();        looperThread.start();looperThread.getHandler().sendEmptyMessage(1);looperThread.exit();handerThread = new HandlerThread("abc");handerThread.start();//Handler在构造时会关联一个Looper，如果空就会使用Looper.myLooper();详见源码handler = new Handler(handerThread.getLooper()){@Overridepublic void handleMessage(Message msg) {Log.d("CYQ", "--->" + msg);}};handler.sendEmptyMessage(100);    }            class LooperThread extends Thread {        private Handler mHandler;        private final Object mSync = new Object();        public void run() {            Looper.prepare();            synchronized (mSync) {                mHandler = new Handler(){                @Override                public void handleMessage(Message msg) {                Log.d("CYQ", "--->" + msg);                }                };                mSync.notifyAll();            }            Looper.loop();        }                public Handler getHandler() {            synchronized (mSync) {                if (mHandler == null) {                    try {                        mSync.wait();                    } catch (InterruptedException e) {                    }                }                return mHandler;            }        }        public void exit() {            getHandler().post(new Runnable(){                public void run() {                    Looper.myLooper().quit();                }});        }    }}

发现sdk中有方便类，可以有另外一种实现方法

HandlerThread的Looper对象可以用于创建一个Handler