两个应用之间传递广播的规则 Broadcast

sendBroadcast(new Intent(Config.ACTION_PRINT),”com.qf.permission.print”);先判断应用有没有对应的权限 再去判断有没有对应的action两者都对应了才能进行接收      一个应用声明了权限 另一个应用使用了该权限并且action（频道相同）则可以接收广播

应用4发广播应用4里边对应频道的接受者都可以接受   应用5使用了应用4声明的权限并且接受者的action（频道）一直因此也可以接受4的广播   5发广播4也能接受 除非自己设置不接受其他应用的广播（见4的配置文件）  5也可以指定接受者的包名固定发给某个应用（见5的MainActivity.java）

配置文件里可以设置接受者的优先级越高先接受（见4配置文件）

 package com.qf.broadcastreceiver04;
 
 public class Config {
 
     //声明广播的Action
     public static final String ACTION_PRINT="com.qf.broadcast.print";
 }

4_Config.java

 package com.qf.broadcastreceiver04;
 
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
 
 public class MainActivity extends Activity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
     }
 
     public void send1(View v){
         //发送打印广播: 有序广播，且带接收此广播的权限(需要在manifest文件中声明和使用)
         //sendOrderedBroadcast(new Intent(Config.ACTION_PRINT),"com.qf.permission.print");
 
         //带有权限发送广播
         sendBroadcast(new Intent(Config.ACTION_PRINT), "com.qf.permission.print");
 
         //sendBroadcast(new Intent(Config.ACTION_PRINT));
     }
 
 }

4_MainActivity.java

 package com.qf.broadcastreceiver04;
 
 import java.util.Date;
 
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
 import android.util.Log;
 
 public class MyReceiver01 extends BroadcastReceiver {
 
     @Override
     public void onReceive(Context context, Intent intent) {
         // TODO Auto-generated method stub
         Log.i("debug", "--MyReceiver01---onReceive--"+new Date());
     }
 
 }

4_MyReceiver01.java

4的另外两个和01一样

4的配置文件

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.qf.broadcastreceiver04"
     android:versionCode="1"
     android:versionName="1.0" >
 
     <uses-sdk
         android:minSdkVersion="8"
         android:targetSdkVersion="17" />
 
     <!-- 定义权限 -->
     <permission android:name="com.qf.permission.print" />
 
     <!-- 使用权限 -->
     <uses-permission android:name="com.qf.permission.print" />
 
     <application
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme" >
         <activity
             android:name="com.qf.broadcastreceiver04.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>
 
         <!-- 注册广播接收器 -->
         <receiver
             android:name="com.qf.broadcastreceiver04.MyReceiver01"
             android:permission="com.qf.permission.print" >
             <intent-filter>
                 <action android:name="com.qf.broadcast.print" />
             </intent-filter>
         </receiver>
         <receiver
             android:name="com.qf.broadcastreceiver04.MyReceiver02"
             android:permission="com.qf.permission.print" >
             <intent-filter android:priority="80" >
                 <action android:name="com.qf.broadcast.print" />
             </intent-filter>
         </receiver>
 
         <!-- android:permission 设置接收的广播是带有权限的（发送广播端必须使用此权限）
              android:exported="false" 不接收外部应用发送的广播 -->
         <receiver
             android:name="com.qf.broadcastreceiver04.MyReceiver03"
             android:permission="com.qf.permission.print"
             android:exported="false" >
 
             <!-- 通过priority属性设置接收广播的优先级(范围： -1000~1000) -->
             <intent-filter android:priority="100" >
                 <action android:name="com.qf.broadcast.print" />
             </intent-filter>
         </receiver>
     </application>
 
 </manifest>

AndroidManifest.xml

 package com.qf.broadcastreceiver05;
 
 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
 
 /**
  * 接收04应用中发送的广播
  * @author apple
  *
  */
 public class MainActivity extends Activity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
     }
 
     public void sendBroadcast(View v){
         Intent intent=new Intent("com.qf.broadcast.print");
         intent.setPackage("com.qf.broadcastreceiver04"); //设置可以接收此广播的应用的包名
 
         sendBroadcast(intent);
     }
 
 }

5_MainActivity.java

5的recerver也是一样的

5的配置文件

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.qf.broadcastreceiver05"
     android:versionCode="1"
     android:versionName="1.0" >
 
     <uses-sdk
         android:minSdkVersion="8"
         android:targetSdkVersion="17" />
 
     <uses-permission android:name="com.qf.permission.print"/>
 
     <application
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme" >
         <activity
             android:name="com.qf.broadcastreceiver05.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>
 
        <receiver android:name="com.qf.broadcastreceiver05.MyReceiver01">
            <intent-filter>
                <action android:name="com.qf.broadcast.print"/>
            </intent-filter>
        </receiver>
 
     </application>
 
 </manifest>

5_AndroidManifest.xml