Android HandlerThread的用法

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：
 
 
   
 
   
 
 
1. import android.app.Activity;  
2. import android.os.Bundle;  
3. import android.os.Handler;  
4. import android.os.Handler.Callback;  
5. import android.os.HandlerThread;  
6. import android.os.Message;  
7.   
8.   
9. public class MainActivity extends Activity {  
10. new HandlerThread("test");  
11.     Handler handler;  
12.       
13. @Override  
14. protected void onCreate(Bundle savedInstanceState) {  
15. super.onCreate(savedInstanceState);  
16.         setContentView(R.layout.activity_main);  
17. "cur_id="+Thread.currentThread().getId());  
18.           
19.         handlerThread.start();  
20. "handlerThread.id=" + handlerThread.getId());  
21. //post(runnable)，只是直接运行了run()，run()内ThreadId与UIThread是一样的  
22. //      handler = new Handler();   
23. //post(runnable)，将runnable运行在handlerThread中，这是非UIThread的  
24. new Handler(handlerThread.getLooper(), new Callback() {  
25.               
26. @Override  
27. public boolean handleMessage(Message msg) {  
28. "receive message.whatA=" + msg.what);  
29. if (msg.what == 1) {  
30. return true;//不再向外层传递  
31. else {  
32. return false; //外层的handleMessage() 继续执行  
33.                 }  
34.                   
35.             }  
36.         }) {  
37. @Override  
38. public void handleMessage(Message msg) {  
39. // TODO Auto-generated method stub  
40. super.handleMessage(msg);  
41. "receive message.whatB=" + msg.what);  
42.             }  
43.         };  
44. new Runnable() {  
45.               
46. @Override  
47. public void run() {  
48. "handler_post_cur_id="+Thread.currentThread().getId());  
49. 1);  
50. 2);  
51.             }  
52.         });  
53.           
54.     }  
55.   
56. }  
 
运行结果： 
 
   
 
   
 
 
1. 01-23 07:12:31.590: I/System.out(12386): cur_id=1  
2. 01-23 07:12:31.590: I/System.out(12386): handlerThread.id=1866  
3. 01-23 07:12:31.590: I/System.out(12386): handler_post_cur_id=1866  
4. 01-23 07:12:31.600: I/System.out(12386): receive message.whatA=1  
5. 01-23 07:12:31.600: I/System.out(12386): receive message.whatA=2  
6. 01-23 07:12:31.600: I/System.out(12386): receive message.whatB=2