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最新推荐文章于 2019-04-30 14:22:12 发布

原创最新推荐文章于 2019-04-30 14:22:12 发布 · 378 阅读

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#thread #class

本文介绍了一个自定义的Android应用程序，该程序通过创建一个新的线程并使用Handler机制来发送和接收消息。文章展示了如何在一个单独的线程中初始化Looper，并通过Handler发送不同类型的Message，同时还演示了如何使用IdleHandler进行空闲处理。

package com.android.HandleMessage;

import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.MessageQueue;
import android.util.Log;

public class HandleMessageActivity extends Activity {
	
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		
		Thread threadA = new Thread() {
			
			
			@Override
			public void run() {
			Looper.prepare();
			Looper.myQueue().addIdleHandler(new threadAIdler());
				Handler handlerA = new Handler() {
					
					@Override
					public void handleMessage(Message msg) {
						switch (msg.what) {
						case 0:
							Log.i("threadA", this.getLooper().myLooper().myQueue().toString());
							Log.i("threadA", "ThreadA reveived a message0000000000!");
							Log.i("threadA", Looper.myLooper().getThread().getName());
							break;
						case 1:
							Log.i("threadA", "ThreadA reveived a message1111111111!");
							break;
						default:
							break;
						}
					}
					
				};
				Message msg = Message.obtain();
				msg.what = 0;
				handlerA.sendMessage(msg);
				msg = Message.obtain();
				msg.what = 1;
				handlerA.sendMessage(msg);
				Looper.loop();
		};
		threadA.start();
	
	private class threadAIdler implements MessageQueue.IdleHandler {

		@Override
		public boolean queueIdle() {
			Log.i("threadA", "ThreadA Idler run");
			return false;
		}
		
	}
}