Question

在我的应用程序中，用户必须添加多个通知，但我的问题是当用户添加新通知时旧的通知被删除或取消。我认为它来自pendingIntent，应该是什么相应的标志用吗？

这是我的一些代码：

Calendar calendar = Calendar.getInstance();
    Intent intent;
    PendingIntent pendingIntent;
    AlarmManager alarmManager;
    long futureInMillis;
    switch (type) {
        case SCHEDULE_BY_DAYS:
            intent = new Intent(this, NotificationReceiver.class);
            intent.putExtra(NotificationReceiver.NOTIFICATION_ID, 1);
            intent.putExtra(NotificationReceiver.NOTIFICATION, getNotification("WAKEP UP days !!"));
            pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
            alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
            alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
            break;
        case SCHEDULE_BY_HOURS:

            futureInMillis = SystemClock.elapsedRealtime() + (value * 600000);
            intent = new Intent(this, NotificationReceiver.class);
            intent.putExtra(NotificationReceiver.NOTIFICATION_ID, 1);
            intent.putExtra(NotificationReceiver.NOTIFICATION, getNotification("WAKEP UP hours"));
            pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

            alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
            alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, futureInMillis, pendingIntent);
            break;

Answer 1

如果为每个PendingIntent通知指定不同的requestCode，则通知不会互相取消。

PendingIntent.getBroadcast(this, unique_code , intent, PendingIntent.FLAG_UPDATE_CURRENT);

修改

int uniqueCode = sharedPreferences.getInt("unique_code",0) + 1; sharedPreferences.edit().putInt("unique_code",uniqueCode).apply()

Answer 2

您需要在应用程序build.gradle文件中添加如下所示的依赖项：

Java：实现“ androidx.preference：preference：1.1.1”

Kotlin：实现“ androidx.preference：preference-ktx：1.1.1”

然后在您的片段中执行类似的操作。如果您在活动中，则不需要requireActivity（）。

`
 val sharedPreferences = requireActivity().getSharedPreferences("Notification_data", Context.MODE_PRIVATE)
    val customRequestCode = sharedPreferences.getInt("customRequestCode", 0) + 1
    sharedPreferences.edit().putInt("customRequestCode", customRequestCode).apply()
`

新通知取消旧通知

2 个答案: