Android BroadcastReceiver两种注册方式区别

/************ 动态注册 ************/

TextMain.java

package lxy.litsoft; 
 
import android.app.Activity; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.content.IntentFilter; 
import android.os.Bundle; 
import android.util.Log; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
 
public class TestMain extends Activity { 
     
    BroadcastReceiver bcr;  //声明一个广播接收器  
    Button btSendMessage;   //声明一个按钮  
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
         
        //实例化广播接收器对象  
        bcr = new BroadcastReceiver(){ 
            public void onReceive(Context context, Intent intent) { 
                Log.d("test", "^-^, Have received Massage!"); 
            } 
        }; 
         
        //实例化按键对象并为其添加监听器  
        btSendMessage = (Button)findViewById(R.id.button01); 
        btSendMessage.setOnClickListener(new ButtonListener()); 
    } 
     
    class ButtonListener implements OnClickListener{ 
        public void onClick(View v) { 
            //当点击按钮的时候，就发送广播  
            Intent intent = new Intent(); 
            intent.setAction("ABC"); 
            sendBroadcast(intent); 
        } 
    } 
     
    protected void onStart() { 
        super.onStart(); 
        //注册广播接收器（动态注册）  
        IntentFilter filter = new IntentFilter(); 
        filter.addAction("ABC"); 
        this.registerReceiver(bcr, filter); 
    } 
 
    protected void onStop() { 
        super.onStop(); 
        //取消注册广播接收器  
        this.unregisterReceiver(bcr); 
    }   
} 
main.xml

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    > 
<TextView   
    android:layout_width="fill_parent"  
    android:layout_height="wrap_content"  
    android:text="@string/hello" 
    /> 
<Button 
    android:id="@+id/button01" 
    android:text="SendMessage" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"></Button> 
</LinearLayout> 
/************ 静态注册 ************/

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?> 
<manifest xmlns:android="http://schemas.android.com/apk/res/android" 
      package="lxy.litsoft" 
      android:versionCode="1" 
      android:versionName="1.0"> 
    <uses-sdk android:minSdkVersion="8" /> 
 
    <application android:icon="@drawable/icon" android:label="@string/app_name"> 
        <activity android:name=".TestMain" 
                  android:label="@string/app_name"> 
            <intent-filter> 
                <action android:name="android.intent.action.MAIN" /> 
                <category android:name="android.intent.category.LAUNCHER" /> 
            </intent-filter> 
        </activity> 
 
        <receiver android:name="MyBroadcastReciever"> 
            <intent-filter> 
                <action android:name="ABC"></action> 
            </intent-filter> 
        </receiver> 
         
    </application> 
</manifest> 
TestMain.java

package lxy.litsoft; 
 
import android.app.Activity; 
import android.content.Intent; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
 
public class TestMain extends Activity { 
     
    Button btSendMessage;   //声明一个按钮  
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
 
        btSendMessage = (Button)findViewById(R.id.button01); 
        btSendMessage.setOnClickListener(new ButtonListener()); 
    } 
     
    class ButtonListener implements OnClickListener{ 
        public void onClick(View v) { 
            //当点击按钮的时候，就发送广播  
            Intent intent = new Intent(); 
            intent.setAction("ABC"); 
            sendBroadcast(intent); 
        } 
    } 
  
} 
MyBroadcastReciever.java

package lxy.litsoft; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
import android.util.Log; 
 
 
public class MyBroadcastReciever extends BroadcastReceiver{ 
    public void onReceive(Context context, Intent intent) { 
        Log.d("test", "^-^, Have received Massage!"); 
    } 
} 
动态注册和静态注册一个BroadcastReceiver的区别：

动态注册较静态注册灵活。实验证明：当静态注册一个BroadcastReceiver时，不论应用程序是启动与否。都可以接受对应的广播。

动态注册的时候，如果不执行unregisterReceiver();方法取消注册，跟静态是一样的。但是如果执行该方法，当执行过以后，就不能接受广播了。

评论

1 楼 a455642158 2012-05-31  

转的……？