android 动态注册 广播

引用：http://hi.baidu.com/duanxzf/item/39061b0e7d6bd184a2df434c

在动态注册中，不需要再AndroidManifest.xml中配置receiver了。

在onResume函数中，通过registerReceiver（）注册，在onPause（）中，通过unregisterReceiver（）来取消注册。

package com.dxz.broadcasttest.dynamic;

import android.app.Activity;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class BroadcastTest extends Activity {

 public static final String NEW_LIFEFORM_DETECTED = "com.dxz.broadcasttest.NEW_LIFEFORM";
 
 protected  MyBroadcastReceiver receiver;

 @Override
 protected void onCreate(Bundle savedInstanceState) {

  // TODO Auto-generated method stub
  super.onCreate(savedInstanceState);
  setContentView(R.layout.main2);
  Button btn0 = (Button) findViewById(R.id.btn0);
  btn0.setOnClickListener(new OnClickListener() {
   public void onClick(View v) {
    Intent it = new Intent(NEW_LIFEFORM_DETECTED);
    sendBroadcast(it);
   }
  });
 }

 @Override
 protected void onResume() {
  // TODO Auto-generated method stub
  super.onResume();
  System.out.println("in dynamic onResume register");
  IntentFilter counterActionFilter = new IntentFilter(
    NEW_LIFEFORM_DETECTED);
  receiver = new MyBroadcastReceiver();
  registerReceiver(receiver, counterActionFilter);
 }
 
 @Override
 protected void onPause() {
  // TODO Auto-generated method stub
  super.onPause();
  System.out.println("in dynamic onPause unregister");
  unregisterReceiver(receiver);
 }
}

receiver代码：

package com.dxz.broadcasttest.dynamic;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;
import android.widget.Toast;

public class MyBroadcastReceiver extends BroadcastReceiver {

 public MyBroadcastReceiver () {        
  Log.v("BROADCAST_TAG", "myBroadCast");  
 } 
 @Override
 public void onReceive(Context context, Intent intent) {
  // TODO Auto-generated method stub
  System.out.println("dynamic");
  Toast.makeText(context, "成功接收广播dynamic：", Toast.LENGTH_LONG).show();
 }

}

AndroidManifest.xml文件：（没有receiver节点了）

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.dxz.broadcasttest.dynamic"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="4" />
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".BroadcastTest"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>