Question

我正在使用FCM，在onMessageReceived()中我正在使用PendingIntent.getBroadcast()调用同一服务中存在的BroadcastReceiver。在下面的代码中，如果从通知托盘中删除了通知，我将发送广播。

 @Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);

     ......

     Intent intent = new Intent(getApplicationContext(), MyBroadcastReceiver.class);
            intent.putExtra("id", NOTIFICATION_ID);
            PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
            builder.setDeleteIntent(pendingIntent);

     ......

}

此外，在通过其他活动发送广播时，我正在使用onCreate()方法注册BroadcastReceiver。

@Override
public void onCreate() {
    super.onCreate();
    Log.d(TAG, "onCreate: ");

    //  registering the broadcast receiver on action "broadcastReceiverAction"
    IntentFilter intentFilter = new IntentFilter("broadcastReceiverAction");
    LocalBroadcastManager.getInstance(this).registerReceiver(new MyBroadcastReceiver(), intentFilter);
}

我观察到，从清单中删除静态接收器时，尽管已将广播接收器注册在BrodcastReceiver中，但仍未调用onCreate()来删除通知。 PendingIntent.getBroadcast()方法。为什么会这样呢？这是否意味着public static class MyBroadcastReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { SharedPreferences sharedPreferences = context.getSharedPreferences("shared", MODE_PRIVATE); SharedPreferences.Editor editor = sharedPreferences.edit(); editor.remove(String.valueOf(intent.getExtras().getInt("id"))); editor.commit(); } }需要一个静态接收器？

MyBroadcastReceiver

<receiver android:name=".MyFirebaseMessagingService$MyBroadcastReceiver"  android:exported="true">
        <intent-filter>
            <action android:name="broadcastReceiverAction" />
        </intent-filter>
    </receiver>

编辑1 静态广播接收器

onDestroy()

在@Override public void onDestroy() { super.onDestroy(); Log.d(TAG, "onDestroy: "); // un-registering receiver LocalBroadcastManager.getInstance(this).unregisterReceiver(new MyBroadcastReceiver()); }上取消广播接收器的注册

google_services.json

Answer 1

因为您的代码使用动态广播（非静态）是不正确的。

首先，您以onCreate方法注册

//  registering the broadcast receiver on action "broadcastReceiverAction"
IntentFilter intentFilter = new IntentFilter("broadcastReceiverAction");
LocalBroadcastManager.getInstance(this).registerReceiver(new MyBroadcastReceiver(), intentFilter);

然后您发送广播

Intent intent = new Intent(getApplicationContext(), MyBroadcastReceiver.class);
intent.putExtra("id", NOTIFICATION_ID);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

您忘记将action添加到由PendingIntent包裹的意图中，该意图说明系统为何找不到并触发您的广播。

将代码更改为

Intent intent = new Intent(getApplicationContext(), MyBroadcastReceiver.class);
intent.setAction("broadcastReceiverAction"); // Add this line
intent.putExtra("id", NOTIFICATION_ID);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

更新：删除通知后，PendingIntent将执行广播，就像呼叫Context.sendBroadcast()一样。在您的代码中，您使用LocalBroadcastManager，该捕获的message/intent仅从应用程序的组件中广播。它无法从系统中捕获message/intent。

因此将代码更改为

private MyBroadcastReceiver myBroadcastReceiver;

@Override
public void onCreate() {
    super.onCreate();
    //  registering the broadcast receiver on action "broadcastReceiverAction"
    IntentFilter intentFilter = new IntentFilter("broadcastReceiverAction");
    myBroadcastReceiver = new MyBroadcastReceiver();
    registerReceiver(myBroadcastReceiver, intentFilter);
}

@Override
public void onDestroy() {
    super.onDestroy();
    unregisterReceiver(myBroadcastReceiver);
}

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    super.onMessageReceived(remoteMessage);

     ......

     Intent intent = new Intent("broadcastReceiverAction");
     intent.putExtra("id", NOTIFICATION_ID);
     PendingIntent pendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
     builder.setDeleteIntent(pendingIntent);

     ......

}

为什么PendingIntent.getBroadcast（）只被静态接收者识别？

1 个答案: