Android BroadcastReceiver

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<receiver             android:name=".MyReceiver"             android:enabled="true"             android:exported="true">             <!--<intent-filter android:priority="11">-->             <intent-filter >                 <action android:name="com.grandkai.learnbroadcastreceiver.intent.action.MyReceiver" />             </intent-filter>           </receiver>           <receiver             android:name=".MyReceiver2"             android:enabled="true"             android:exported="true">             <!--<intent-filter android:priority="10">-->             <intent-filter >                 <action android:name="com.grandkai.learnbroadcastreceiver.intent.action.MyReceiver" />             </intent-filter>         </receiver>   不指定优先级的情况下，先注册的BroadcastReceiver先执行，不想继续向下执行其他BroadcastReceiver需要在onReceive中执行abortBroadcast()；同时启动广播时需要发送有序广播sendOrderedBroadcast(..);    @Override     public void onClick(View view) {         switch (view.getId()) {             case R.id.button:                 Intent intent = new Intent(ACTION); //                Intent intent = new Intent(MainActivity.this, MyReceiver.class);                 intent.putExtra("data","111");                 sendOrderedBroadcast(intent, null);                 break;             case R.id.btnReg:                 if (myReceiver == null) {                     System.out.println("注册服务");                     myReceiver = new MyReceiver();                     registerReceiver(myReceiver , new IntentFilter(ACTION));                 }                 break;             case R.id.btnUnreg:                 if (myReceiver != null) {                     System.out.println("注销服务");                     unregisterReceiver(myReceiver);                 }                 break;           }     }     private MyReceiver myReceiver = null;

　　

BroadcastReceiver所对应的广播分两类：普通广播和有序广播。

（1）普通广播所有的receivers接收器的执行顺序不确定。    因此，所有的receivers接收器接收broadcast的顺序不确定。

（2）有序广播通过在intent-filter中设置android:priority属性来设置receiver的优先级。优先级相同的receiver其执行顺序不确定。代码中注册的话，且其intent-filter拥有相同android:priority属性的话，先注册的将先收到广播。