java - BroadcastReceiver 第二次不起作用

Question

我正在尝试使用 AlarmManager 安排通知当我安排一个通知时它工作得很好，但是当我安排两个通知时，第一个通知没问题，但第二个通知不起作用。

我发现几分钟后打开应用程序会通知第二个通知。我认为我的 BroadcastReceiver 有问题

MainActivity.java

Intent intent = new Intent(context,NotificationClass.class);
intent.putExtra("notification_id", id);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context,id,intent,PendingIntent.FLAG_UPDATE_CURRENT);
alarmManager.setExactAndAllowWhileIdle(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),pendingIntent);

通知.java

public class NotificationClass extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        int id = intent.getIntExtra("notification_id",0);
        NotificationCompat.Builder builder = new NotificationCompat.Builder(context,"1")
            .setContentTitle("Notification")
            .setContentText("Content")
            .setSmallIcon(R.drawable.notif_ic);

        Notification notification = builder.build();
        NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);

        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
            NotificationChannel channel = new NotificationChannel("1","test", NotificationManager.IMPORTANCE_HIGH);
            notificationManager.createNotificationChannel(channel);
        }
        notificationManager.notify(id,notification);
}

AndroidManifest.xml

<receiver android:name=".NotificationClass" ></receiver> 

我不知道我的代码有什么问题。有人可以帮我解决这个问题吗？

Answer 1

广播接收器接收数据:

private BroadcastReceiver mReceiver = new BroadcastReceiver() {

    @Override
    public void onReceive(Context context, Intent intent) {
        String alertMessage = intent.getStringExtra("type");

        doNotificationAlertWorkHere(alertMessage);
    }
};

注册和取消注册您的广播以避免静态泄漏。

通过 Android list 文件。 (静态)

<receiver android:name="YourBroadcastReceiverName"> </receiver>

通过 Context.registerReceiver() 和 Context.unregisterReceiver() 方法。 (动态)

 @Override
    protected void onPause() {
        super.onPause();
        // unregister broadcast
        LocalBroadcastManager.getInstance(this).unregisterReceiver(mReceiver);
    }

    @Override
    protected void onResume() {
        super.onResume();

        // register broadcast
        IntentFilter filter = new IntentFilter(Constants.ACTION);
        LocalBroadcastManager.getInstance(this).registerReceiver(mReceiver, filter);
    }

发送广播，如:

// public static final String ACTION = "ALERT";

Intent intent = new Intent(Constants.ACTION);
intent.putExtra("type", "SUP BRO. Stay Inside");
LocalBroadcastManager.getInstance(this).sendBroadcast(intent);

知识说明:- 广播接收器就像一门大炮来击中目标，您必须确定要发射什么(例如消息)，在哪里发射(例如， Activity )。装载和卸载大炮以获得另一次命中。 (例如。注册和注销)