HanlderThread继承自Thread，HandlerThread能够新建拥有Looper的线程,它的run()中通过Looper.prepare()创建了消息队列，并通过Looper.loop()开启了消息循环，这样我们就可以在HandlerThread中创建Handler
public class MainActivity extends AppCompatActivity {
/**
* 工作消息标志
*/
private final static int MSG_WORK = 0x01;
private Handler mHandler;
private HandlerThread mHandlerThread;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mHandlerThread = new HandlerThread("HandlerThread");
mHandlerThread.start(); //开始线程
mHandler = new Handler(mHandlerThread.getLooper()) {
@Override
public void handleMessage(Message msg) {
try {
Thread.sleep(3000); //模拟延时操作
Log.e(Thread.currentThread().getName(), (int) (Math.random() * 3000 + 1000) + "");
mHandler.sendEmptyMessageDelayed(MSG_WORK, 1000); //延时一秒发送工作消息
} catch (InterruptedException e) {
e.printStackTrace();
}
}
};
mHandler.sendEmptyMessage(MSG_WORK); //发送工作消息,触发消息Handler执行
}
@Override
protected void onDestroy() {
super.onDestroy();
mHandler.removeMessages(MSG_WORK); //移除队列中为执行的工作消息
mHandlerThread.quit(); //退出线程
}
}
