BrocastReceiver在code与在xml里面注册的区别

lsupper

在code里面注册，只有你的Activity或service处于当前运行的状态才能接受到消息，当Activity或service不处于活的状态，则是接不到消息的。而在xml里面注册的话，那样不管是否处于活的状态都可以接收到消息的.
code:
适用于更新UI，内部使用

1. public class Android_TestReceiver_registerInCodeActivity extends Activity implements OnClickListener{
   
2.     private Button registerBtn = null;
   
3.     private Button unRegisterBtn = null;
   
4.     private MySMSReceiver myreceiver = null;
   
5.     private IntentFilter ifilter = null;
   
6.     /** Called when the activity is first created. */
   
7.     @Override
   
8.     public void onCreate(Bundle savedInstanceState) {
   
9.         super.onCreate(savedInstanceState);
   
10.         setContentView(R.layout.main);
    
11.         
    
12.         registerBtn = (Button)findViewById(R.id.registerBtn);
    
13.         unRegisterBtn = (Button)findViewById(R.id.unRegisterBtn);
    
14.         
    
15.         registerBtn.setOnClickListener(this);
    
16.         unRegisterBtn.setOnClickListener(this);
    
17.         
    
18.         myreceiver = new MySMSReceiver();
    
19.         ifilter = new IntentFilter();
    
20.         ifilter.addAction("android.provider.Telephony.SMS_RECEIVED");
    
21.         
    
22.         
    
23.     }
    
24.     @Override
    
25.     public void onClick(View v) {
    
26.         //register
    
27.         if(v.getId() == R.id.registerBtn){
    
28.             registerReceiver(myreceiver, ifilter);
    
29.         }
    
30.         
    
31.         //unRegister
    
32.         if(v.getId() == R.id.unRegisterBtn){
    
33.             unregisterReceiver(myreceiver);
    
34.         }
    
35.         
    
36.     }
    
37. 
    
38. }

XML：
全局的，服务，监听其他应用

1.         <receiver android:name=".MyReceiver">
   
2.             <intent-filter>
   
3.                 <action android:name="android.intent.action.EDIT"/>
   
4.             </intent-filter>
   
5.         </receiver>