Android之有序广播

布局代码

<?xml version="1.0" encoding="utf-8"?>  
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    xmlns:tools="http://schemas.android.com/tools"  
    android:id="@+id/activity_main"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    android:paddingBottom="@dimen/activity_vertical_margin"  
    android:paddingLeft="@dimen/activity_horizontal_margin"  
    android:paddingRight="@dimen/activity_horizontal_margin"  
    android:paddingTop="@dimen/activity_vertical_margin"  
    android:background="@drawable/stitch_one"  
    tools:context="com.example.bz0209.myapplication.MainActivity">  
  
  
    <Button  
        android:text="发送有序广播"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_marginTop="58dp"  
        android:id="@+id/button"  
        android:onClick="click"  
        android:layout_alignParentTop="true"  
        android:layout_centerHorizontal="true" />  
</RelativeLayout>  

代码如下：

public class MyReceiver01 extends BroadcastReceiver {  
    public MyReceiver01() {  
    }  
  
    @Override  
    public void onReceive(Context context, Intent intent) {  
        Log.i("MyReceiver01","自定义广播接收者1，接收到了广播");  
    }  
}  

广播 01 ，02,03与上类同设置优先级代码如下

<receiver  
            android:name=".MyReceiver01">  
            <intent-filter android:priority="100">  
                <action android:name="intercept_Stitch"/>  
            </intent-filter>  
        </receiver>  
  
        <receiver  
            android:name=".MyReceiver02">  
            <intent-filter android:priority="400">  
                <action android:name="intercept_Stitch"/>  
            </intent-filter>  
        </receiver>  
  
  
  
        <receiver  
            android:name=".MyReceiver03">  
            <intent-filter android:priority="600">  
                <action android:name="intercept_Stitch"/>  
            </intent-filter>  
        </receiver>  
    </application>  

修改广播3代码：

public class MyReceiver03 extends BroadcastReceiver {  
    public MyReceiver03() {  
    }  
  
    @Override  
    public void onReceive(Context context, Intent intent) {  
        Log.i("MyReceiver03","自定义广播接收者3，接收到了广播");  
        abortBroadcast();  
        Log.i("MyReceiver03","自定义广播接收者3,终结广播");  
    }  
} 

修改优先级代码

<receiver  
           android:name=".MyReceiver01">  
           <intent-filter android:priority="1000">  
               <action android:name="intercept_Stitch"/>  
           </intent-filter>  
       </receiver>  
  
       <receiver  
           android:name=".MyReceiver02">  
           <intent-filter android:priority="1000">  
               <action android:name="intercept_Stitch"/>  
           </intent-filter>  
       </receiver>  
  
  
  
       <receiver  
           android:name=".MyReceiver03">  
           <intent-filter android:priority="600">  
               <action android:name="intercept_Stitch"/>  
           </intent-filter>  
       </receiver>  
   </application>  

实验结果图：

有序广播，即从优先级别最高的广播接收器开始接收，接收完了如果没有丢弃，就下传给下一个次高优先级别的广播接收器进行处理，依次类推，直到最后。如果多个应用程序设置的优先级别相同，则谁先注册的广播，谁就可以优先接收到广播。这里接收短信的广播是有序广播，因此可以设置你自己的广播接收器的级别高于系统原来的级别，就可以拦截短信，并且不存收件箱，也不会有来信提示音。里面的android:priority="100"就是设定广播接收器的级别，这个值从1000～-1000，数值越大，优先级别就越高。
实现方法是：
<receiverAndroid:name=".SmsReceiver">
   <intent-filterAndroid:priority="100">
    <actionandroid:name="android.provider.Telephony.SMS_RECEIVED"/>                  
   </intent-filter>
</receiver>