两个应用间的广播发送与接收

佚名 6年前 (2019-04-20) 随笔 1044人围观抢沙发百度已收录

有两个程序BroadcastTest1和BroadcastTest2，前者负责发送广播，后者负责接收广播

1.Broadcast2-----接受广播

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Broadcast2中的广播接收器MyReceiver的onReceive()

1 public void onReceive(Context context, Intent intent) { 2         // TODO: This method is called when the BroadcastReceiver is receiving 3         // an Intent broadcast.
4         Toast.makeText(context, "Received in Receiver", Toast.LENGTH_LONG).show(); 5     }

在Broadcast2的AndroidManifest.xml中注册广播，广播的action为 com.example.broadcasttest1.MY_BROADCAST

1  <receiver 2　　　　　　　 android:name=".MyReceiver"
3  android:enabled="true"
4  android:exported="true">
5             <intent-filter>
6                 <action android:name="com.example.broadcasttest1.MY_BROADCAST" />
7             </intent-filter>
8         </receiver>

2.Broadcast1-----发送广播

broadcast1的布局中有一个Button用于发送广播，代码省略掉

broadcast1的MainActivity的onCreate()部分

特别注意的是sendBroadcast(intent)的前面应加上intent.setComponent()，里面具体参数如下随笔所示

i.e.关于Android8及以上版本自定义广播无法接收问题

 1  @Override  2     protected void onCreate(Bundle savedInstanceState) {  3         super.onCreate(savedInstanceState);  4  setContentView(R.layout.activity_main);  5 
 6         Button button = (Button) findViewById(R.id.button);  7         button.setOnClickListener(new View.OnClickListener() {  8  @Override  9             public void onClick(View v) { 10                 Intent intent = new Intent("com.example.broadcasttest1.MY_BROADCAST"); 11                 intent.setComponent(new ComponentName("com.example.broadcasttest2", "com.example.broadcasttest2.MyReceiver")); 12                 sendBroadcast(intent); 13  } 14  }); 15     }