Android HandlerThread使用方法详解

android handlerthread使用方法详解

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：

import android.app.activity;  
import android.os.bundle;  
import android.os.handler;  
import android.os.handler.callback;  
import android.os.handlerthread;  
import android.os.message;  
  
  
public class mainactivity extends activity {  
  handlerthread handlerthread = new handlerthread("test");  
  handler handler;  
    
  @override  
  protected void oncreate(bundle savedinstancestate) {  
    super.oncreate(savedinstancestate);  
    setcontentview(r.layout.activity_main);  
    system.out.println("cur_id="+thread.currentthread().getid());  
      
    handlerthread.start();  
    system.out.println("handlerthread.id=" + handlerthread.getid());  
    //post(runnable)，只是直接运行了run()，run()内threadid与uithread是一样的  
//   handler = new handler();   
    //post(runnable)，将runnable运行在handlerthread中，这是非uithread的  
    handler = new handler(handlerthread.getlooper(), new callback() {  
        
      @override  
      public boolean handlemessage(message msg) {  
        system.out.println("receive message.whata=" + msg.what);  
        if (msg.what == 1) {  
          return true;//不再向外层传递  
        } else {  
          return false; //外层的handlemessage() 继续执行  
        }  
          
      }  
    }) {  
      @override  
      public void handlemessage(message msg) {  
        // todo auto-generated method stub  
        super.handlemessage(msg);  
        system.out.println("receive message.whatb=" + msg.what);  
      }  
    };  
    handler.post(new runnable() {  
        
      @override  
      public void run() {  
        system.out.println("handler_post_cur_id="+thread.currentthread().getid());  
        handler.sendemptymessage(1);  
        handler.sendemptymessage(2);  
      }  
    });  
      
  }  
  
}  

运行结果：

01-23 07:12:31.590: i/system.out(12386): cur_id=1  
01-23 07:12:31.590: i/system.out(12386): handlerthread.id=1866  
01-23 07:12:31.590: i/system.out(12386): handler_post_cur_id=1866  
01-23 07:12:31.600: i/system.out(12386): receive message.whata=1  
01-23 07:12:31.600: i/system.out(12386): receive message.whata=2  
01-23 07:12:31.600: i/system.out(12386): receive message.whatb=2  

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