HandlerThread 继承自Thread,内部封装了Looper。
首先Handler和HandlerThread的主要区别是：Handler与Activity在同一个线程中，HandlerThread与Activity不在同一个线程，而是别外新的线程中(Handler中不能做耗时的操作)。
用法：
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import android.app.Activity;
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import android.os.Bundle;
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import android.os.Handler;
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import android.os.Handler.Callback;
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import android.os.HandlerThread;
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import android.os.Message;
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public class MainActivity extends Activity {
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HandlerThread handlerThread = new HandlerThread("test");
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Handler handler;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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System.out.println("cur_id="+Thread.currentThread().getId());
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handlerThread.start();
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System.out.println("handlerThread.id=" + handlerThread.getId());
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handler = new Handler(handlerThread.getLooper(), new Callback() {
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@Override
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public boolean handleMessage(Message msg) {
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System.out.println("receive message.whatA=" + msg.what);
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if (msg.what == 1) {
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return true;
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} else {
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return false;
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}
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}
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}) {
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@Override
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public void handleMessage(Message msg) {
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super.handleMessage(msg);
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System.out.println("receive message.whatB=" + msg.what);
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}
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};
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handler.post(new Runnable() {
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@Override
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public void run() {
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System.out.println("handler_post_cur_id="+Thread.currentThread().getId());
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handler.sendEmptyMessage(1);
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handler.sendEmptyMessage(2);
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}
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});
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}
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}
运行结果：
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01-23 07:12:31.590: I/System.out(12386): cur_id=1
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01-23 07:12:31.590: I/System.out(12386): handlerThread.id=1866
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01-23 07:12:31.590: I/System.out(12386): handler_post_cur_id=1866
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01-23 07:12:31.600: I/System.out(12386): receive message.whatA=1
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01-23 07:12:31.600: I/System.out(12386): receive message.whatA=2
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01-23 07:12:31.600: I/System.out(12386): receive message.whatB=2
Android HandlerThread的用法
原文：http://blog.csdn.net/shineflowers/article/details/41677891
