java广播接收器第二次不工作

Question

我正在尝试用AlarmManager来安排通知。当我安排一个通知时，效果非常好，但是当我安排两个通知时，第一个通知可以，但是第二个不起作用

我发现几分钟后打开应用程序会通知第二个通知。我想我的收音机出毛病了

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

AndroidManifest。xml

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

我不知道我的代码出了什么问题。有人能帮我吗

Answer 1

接收数据的广播接收器：

private BroadcastReceiver mReceiver = new BroadcastReceiver() {

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

        doNotificationAlertWorkHere(alertMessage);
    }
};

登记册及；注销广播以避免静态泄漏

通过Android清单文件。（静态）

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

通过上下文。registerReceiver（）和上下文。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);

知识提示：-广播接收器就像一门大炮，要获得命中，你必须确定发射什么（如msg），在哪里发射（如活动）。加载和加载；卸下大炮以获得另一次命中。（如注册和注销）

Answer 2

我已经试过了，它正在起作用。在onReceive中添加通知代码

广播接收机

class AlarmReceiver : BroadcastReceiver() {

override fun onReceive(context: Context, intent: Intent) {

 /*
  Your implementation

   */
 }
}

主要节日

    <receiver
        android:name=".AlarmReceiver"
        android:exported="true"
        android:enabled="true" />

创建挂起的意图

val alarmManager = activity.getSystemService(Activity.ALARM_SERVICE) as AlarmManager
        val alarmIntent = Intent(activity.applicationContext, AlarmReceiver::class.java) // AlarmReceiver1 = broadcast receiver

        val calendar = Calendar.getInstance()
        calendar.timeInMillis = timeInMilliSeconds

        val pendingIntent = PendingIntent.getBroadcast(activity, timeInMilliSeconds.toInt(), alarmIntent, PendingIntent.FLAG_CANCEL_CURRENT)
        alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.timeInMillis, pendingIntent)

Answer 3

首先，确保每次创建通知时通知Id都不同

其次，您错过了清单中标记接收中的标记意图过滤器。请检查这个https://developer.android.com/guide/components/broadcasts

希望这有帮助