您好，欢迎来到尔游网。
科技 教育 生活 旅游 时尚 美容 美食 健康 体育 游戏 汽车 家电
搜索
您的当前位置：首页android Handler与Message（多线程间传递消息）

android Handler与Message（多线程间传递消息）

来源：尔游网
public class MainActivity extends Activity {
02      
03     private final static int CHANGE = 1;
04  
05     private static TextView textView;
06      
07     private static Handler handler = new Handler(){
08  
09         @Override
10         public void handleMessage(Message msg) {
11             switch(msg.what) {
12             case CHANGE :
13                 textView.setText(msg.obj + "");
14             }
15         }
16          
17     };
18      
19     @Override
20     public void onCreate(Bundle savedInstanceState) {
21         super.onCreate(savedInstanceState);
22         setContentView(R.layout.activity_main);
23         textView = (TextView) findViewById(R.id.hello);
24          
25          
26         new Thread() {
27              
28             public void run() {
29                 for(int i=0;i<100;i++) {
30                     try {
31                         Thread.sleep(1000);
32                     } catch (InterruptedException e) {
33                         e.printStackTrace();
34                     }
35                     Message msg = new Message();
36                     msg.what = MainActivity.CHANGE;
37                     msg.obj = i;
38                     MainActivity.handler.sendMessage(msg);
39                 }
40             }
41         }.start();
42     }   
43 }

2. [代码]用activity控制dialog显示值的变化     

01 public class MainActivity extends Activity {
02      
03     private final static int CHANGE = 1;
04  
05     private static TextView text2;
06  
07     private static TextView text5;
08      
09     private static Handler handler = new Handler(){
10  
11         @Override
12         public void handleMessage(Message msg) {
13             switch(msg.what) {
14             case CHANGE :
15                 text2.setText(msg.obj + "");
16                 text5.setText(msg.obj + "");
17             }
18         }
19          
20     };
21      
22     @Override
23     public void onCreate(Bundle savedInstanceState) {
24         super.onCreate(savedInstanceState);
25         setContentView(R.layout.activity_main);
26  
27         Dialog dialog = new Dialog(this);
28         dialog.setContentView(R.layout.custom_dialog);
29         dialog.setTitle("test");
30         text2 = (TextView) dialog.findViewById(R.id.text2);
31         text5 = (TextView) dialog.findViewById(R.id.text5);
32         dialog.show();
33          
34         new Thread() {
35              
36             public void run() {
37                 for(int i=0;i<100;i++) {
38                     try {
39                         Thread.sleep(1000);
40                     } catch (InterruptedException e) {
41                         e.printStackTrace();
42                     }
43                     Message msg = new Message();
44                     msg.what = MainActivity.CHANGE;
45                     msg.obj = i;
46                     MainActivity.handler.sendMessage(msg);
47                 }
48             }
49         }.start();
50     }   
51 }

因篇幅问题不能全部显示，请点此查看更多更全内容

查看全文

Copyright © 2019- axer.cn 版权所有 湘ICP备2023022495号-12

违法及侵权请联系：TEL:199 18 7713 E-MAIL:2724546146@qq.com

本站由北京市万商天勤律师事务所王兴未律师提供法律服务