廣播機制 Broadcast 和BroadReceiver

2011-03-23 16:11:45|  分类： Android |  标签：android  intent  context  import  private   |字号 订阅
1、作用

异步操作、通知
2、两种注册方式
2.1 在AndroidManifest.xml中注册
<receiver android:name="EoeAndroidReceiver">
 <intent-filter>
  <action android:name="com.eoeandroid.action.NEW_BROADCAST" />
 </intent-filter>
</receiver>
2.2 在代码中直接注册
IntentFilter filter = new IntentFilter(NEW_BROADCAST);
EoeAndroidReceiver eoeandroidReceiver = new EoeAndroidReceiver();
registerReceiver(eoeandroidReceiver,filter);

3、注销
unregisterReceiver(eoeandroidReceiver);

4、发送广播

sendBroadcast(intent);

5、接收广播
onReceiver(Context context,Intent intent);

6、示例

6.1 MainActivity.Java

package com.browan.server;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
 private static final int ITEM0 = Menu.FIRST;
 private static final int ITEM1 = Menu.FIRST + 1;

 private static final String ACTION_1 = "com.eoeandroid.action.NEW_BROADCAST1";
 private static final String ACTION_2 = "com.eoeandroid.action.NEW_BROADCAST2";
 /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);//相关布局模板文件main.xml      
        setTitle("按menu菜单触发测试");
    }
   
    public boolean onCreateOptionsMenu(Menu menu)
    {
     super.onCreateOptionsMenu(menu);
     menu.add(0,ITEM0,0,"显示Notification");
     menu.add(0,ITEM1,0,"消除Notification");
     menu.findItem(ITEM1);
     return true;
    }
   
    public boolean onOptionsItemSelected(MenuItem item)
    {
     switch(item.getItemId())
     {
      case ITEM0:
      actionClickMenuItem1();
      break;
      case ITEM1:
      actionClickMenuItem2();
      break;
     }
     return true;
    }
   
    private void actionClickMenuItem1() {
  // TODO Auto-generated method stub
  Intent intent = new Intent(ACTION_1);
  sendBroadcast(intent);
 }

 private void actionClickMenuItem2() {
  // TODO Auto-generated method stub
  Intent intent = new Intent(ACTION_2);
  sendBroadcast(intent);
 }

}

6.2 EoeAndroidReceiver1.Java

package com.browan.server;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class EoeAndroidReceiver1 extends BroadcastReceiver{
 private static final int NOTIPICATION_ID = 21321;
 Context context;

 @Override
 public void onReceive(Context context, Intent intent) {
  // TODO Auto-generated method stub
  this.context = context;
  showNotification();
 }

 @SuppressWarnings("unused")
 private void showNotification() {
  // TODO Auto-generated method stub
  // 实例化通知管理器
  NotificationManager notificationManager = (NotificationManager) context.getSystemService(android.content.Context.NOTIFICATION_SERVICE);
  // 实例化一个通知，并指定其图标和标题（在提示栏上显示）
  Notification notification = new Notification(R.drawable.icon,"在EoeAndroidReceiver1里",System.currentTimeMillis());
 
  // 指定单击通知后所打开的详细的通知页面（单击通知后打开 NotificationView）
  PendingIntent contentIntent = PendingIntent.getActivity(context, 0, new Intent(context,MainActivity.class), 0);
  // 设置通知的发送人和通知的详细内容（打开提示栏后在通知列表中显示）
  notification.setLatestEventInfo(context, "通知发送人", "我是详细的通知信息我是详细的通知信息我是详细的通知信息", contentIntent);
  // 发出通知（其中第一个参数为通知标识符）
  notificationManager.notify(getNotipicationId(), notification);
 }

 public static int getNotipicationId() {
  return NOTIPICATION_ID;
 }
}

6.3 EoeAndroidReceiver2.Java

package com.browan.server;

import android.app.NotificationManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class EoeAndroidReceiver2 extends BroadcastReceiver{
 Context context;

 @Override
 public void onReceive(Context context, Intent intent) {
  // TODO Auto-generated method stub
  this.context = context;
  deleteNotification();
 }

 private void deleteNotification() {
  // TODO Auto-generated method stub
  NotificationManager notificationManager = (NotificationManager) context.getSystemService(android.content.Context.NOTIFICATION_SERVICE);
  notificationManager.cancel(EoeAndroidReceiver1.getNotipicationId());
 }
}
6.4 AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.browan.server"
      android:versionCode="1"
      android:versionName="1.0">

 <uses-permission android:name="android.permission.NEW_BROADCAST1" />
 <uses-permission android:name="android.permission.NEW_BROADCAST2" />
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
               
        <!--注册两个BroadcastReceiver -->
        <receiver android:name="EoeAndroidReceiver1">
   <intent-filter>
    <action android:name="com.eoeandroid.action.NEW_BROADCAST1" />
   </intent-filter>
  </receiver>
 
     <receiver android:name="EoeAndroidReceiver2">
   <intent-filter>
    <action android:name="com.eoeandroid.action.NEW_BROADCAST2" />
   </intent-filter>
  </receiver>
    </application>
</manifest>