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java - 通过向广播接收器发送唯一 id 来取消多个通知

问题描述

我使用创建多个通知AlarmManager。每个通知都会正确弹出，我想分别取消每个通知。我有一个AlarmReceiver创建通知并为其设置唯一 ID 的程序。我正在发送意图中的唯一 ID（通过putExtra）。这样，我可以在 中检索它NotificationReceiver并取消通知。但是，它不起作用。

你知道为什么我在使用时总是得到默认值intent.getIntExtra("UNIQUE_ID_NAME",0)吗？这是实现取消这些通知目标的正确方法吗？这是我的代码：

MainActivity 类：

@Override
public void onClick(View v) {
    Intent intent = new Intent(MainActivity.this, ReminderBroadcast.class);
    PendingIntent pendingIntent = PendingIntent.getBroadcast(MainActivity.this, 0, intent, 0);

    AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

    long ctime = System.currentTimeMillis();
    long tensec = 1000 * 5;

    alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, ctime+tensec, 1000*10 , pendingIntent);
}

警报接收器类：

@Override
public void onReceive(Context context, Intent intent) {
    int notification_id = generateRandom();

    Intent activityIntent = new Intent(context, MainActivity.class);
    activityIntent.putExtra(NotificationReceiver.UNIQUE_ID_NAME, notification_id);
    PendingIntent contentIntent = PendingIntent.getActivity(context, 0, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    Intent bYesIntent = new Intent(context, NotifReceiver.class);
    bYesIntent.putExtra(NotificationReceiver.YES_ACTION_ID, "yesID");
    PendingIntent actionYesIntent = PendingIntent.getBroadcast(context, 0, bYesIntent, 0);

    Intent bNoIntent = new Intent(context, NotifReceiver.class);
    bNoIntent.putExtra(NotificationReceiver.NO_ACTION_ID, "noID");
    PendingIntent actionNoIntent = PendingIntent.getBroadcast(context, 0, bNoIntent, 0);

    NotificationCompat.Builder builder = new NotificationCompat.Builder(context, "channel1")
            .setSmallIcon(R.drawable.ic_launcher_background)
            .setContentTitle("Notif")
            .setContentText("Text")
            .setPriority(NotificationCompat.PRIORITY_DEFAULT)
            .setContentIntent(contentIntent)
            .addAction(R.mipmap.ic_launcher, "YES", actionYesIntent)
            .addAction(R.mipmap.ic_launcher, "NO", actionNoIntent)
            .setAutoCancel(true);

    NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
    notificationManager.notify(notification_id, builder.build());
}

public int generateRandom(){
    Random random = new Random();
    return random.nextInt(9999 - 1000) + 1000;
}

通知接收器类：

public class NotificationReceiver extends BroadcastReceiver {
    public static String YES_ACTION_ID = "YesID";
    public static String NO_ACTION_ID = "NoID";
    public static String UNIQUE_ID_NAME = "notification_id";

    @Override
    public void onReceive(Context context, Intent intent) {
        int notification_id= intent.getIntExtra(UNIQUE_ID_NAME,0);

        System.out.println("Notif ID: " + notification_id); // here always is 0;

            String actionYes = intent.getStringExtra(YES_ACTION_ID);
            String actionNo = intent.getStringExtra(NO_ACTION_ID);

            if(actionYes!=null){
                Toast.makeText(context, "YES", Toast.LENGTH_SHORT).show();
            }

            if(actionNo!=null){
                Toast.makeText(context, "NO", Toast.LENGTH_SHORT).show();
            }

        NotificationManager manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        manager.cancel(notification_id);
    }
}

标签： javaandroid

解决方案

我通过更新当前意图和请求代码解决了这个问题。通知正在重用相同的 Intent，因此FLAG_UPDATE_CURRENT应该使用添加来单独取消所有通知。

对于内容意图：

    PendingIntent contentIntent = PendingIntent.getActivity(context, notification_id, activityIntent, PendingIntent.FLAG_UPDATE_CURRENT);

对于行动是意图

    PendingIntent actionYesIntent = PendingIntent.getBroadcast(context, notification_id, bYesIntent, PendingIntent.FLAG_UPDATE_CURRENT);

对于 actionNoIntent：

    PendingIntent actionNoIntent = PendingIntent.getBroadcast(context, notification_id, bNoIntent, PendingIntent.FLAG_UPDATE_CURRENT);

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