Xamarin Android - 从 MainActivity 切换 AlarmReceiver 中通知的开/关振动

本文关键字：通知 Android MainActivity AlarmReceiver 切换 Xamarin | 更新日期: 2023-09-27 17:55:20

GrayBark说："如果你的活动被杀死并且警报被触发，那么就不会有活动打开来停止铃声。如何？？？？

我已经做了一个简单的通知和切换按钮。

1.起初，我没有包括开关按钮，它工作正常。我的代码 就像这个

  • 主活动 

        private void MRemindMe_Click(object sender, EventArgs e)
{
    //StartReminder 1-6hrs
    intRemind = new Intent(this, typeof(AlarmReceiver));
    pendInt = PendingIntent.GetBroadcast(this, 0, intRemind, PendingIntentFlags.UpdateCurrent);
    alarmManager = (AlarmManager)GetSystemService(AlarmService);
    alarmManager.SetInexactRepeating(AlarmType.ElapsedRealtimeWakeup, SystemClock.ElapsedRealtime() + (1000 * mSeekBar.Progress), (1000 * mSeekBar.Progress), pendInt);
    mCancelNotif.Visibility = ViewStates.Visible;
}

  • 报警接收器 

    public override void OnReceive(Context context, Intent intent)
{
    Intent Intent = new Intent(context, typeof(MainActivity));
    PendingIntent BuildPendingIntent = PendingIntent.GetActivity(context, 0, Intent, PendingIntentFlags.CancelCurrent);
    manager = NotificationManager.FromContext(context);
    ISharedPreferences pref = Application.Context.GetSharedPreferences("MyApp", FileCreationMode.Private);
    ISharedPreferencesEditor editor = pref.Edit();
    builder = new NotificationCompat.Builder(context)
        .SetAutoCancel(true)
        .SetContentIntent(BuildPendingIntent)
        .SetContentTitle("Remind Me!")
        .SetTicker("Checklist: Remind Me!")
        .SetContentText("It's time to check your CheckList!")
        .SetSmallIcon(Resource.Drawable.Icon)
        .SetVisibility((int)NotificationVisibility.Public)
        .SetFullScreenIntent(BuildPendingIntent, true)
        .SetPriority((int)NotificationPriority.High)
        .SetDefaults((int)NotificationDefaults.All);
    manager.Notify(0, builder.Build());
}

阿拉伯数字。

然后我终于添加了一个开关切换按钮。当应用程序处于活动状态时，它运行良好，最小化。但是，当它被杀死时，通知会停止，应用程序会停止工作。代码是这样的：

报警接收器 

        public override void OnReceive(Context context, Intent intent)
    {
        Intent Intent = new Intent(context, typeof(MainActivity));
        PendingIntent BuildPendingIntent = PendingIntent.GetActivity(context, 0, Intent, PendingIntentFlags.CancelCurrent);
        manager = NotificationManager.FromContext(context);
        ISharedPreferences pref = Application.Context.GetSharedPreferences("MyApp", FileCreationMode.Private);
        ISharedPreferencesEditor editor = pref.Edit();
        builder = new NotificationCompat.Builder(context)
            .SetAutoCancel(true)
            .SetContentIntent(BuildPendingIntent)
            .SetContentTitle("Remind Me!")
            .SetTicker("Checklist: Remind Me!")
            .SetContentText("It's time to check your CheckList!")
            .SetSmallIcon(Resource.Drawable.Icon)
            .SetVisibility((int)NotificationVisibility.Public)
            .SetFullScreenIntent(BuildPendingIntent, true)
            .SetPriority((int)NotificationPriority.High);
      //added Switch Toggle
        if (MainActivity.mvibrateSW.Checked)
        {
            builder.SetDefaults((int)NotificationDefaults.Vibrate);
        }
        manager.Notify(0, builder.Build());
    }

我该如何解决这个问题？我能感觉到我的问题就在我眼皮底下。另外，我看到了与此类似的问题，但它太模糊了，我无法理解如何通过在切换按钮之间切换来停止播放声音？

Xamarin Android - 从 MainActivity 切换 AlarmReceiver 中通知的开/关振动

最后，我能够得到答案，感谢上帝。首先，要了解问题...我的BroadCastReceiver似乎依赖于MainActivity。如上所述：

如果切换振动被切换，则主活动被终止，但警报被触发，因此警报不会触发，因为 BroadCastReceiver 找不到

切换是否切换
To put it Simply
Switch is On (SetVibration = true)
   ↳ Click to Turn On alarm
     ↳ Alarm Service is fired
       ↳ You want to exit App? = Yes
         ↳ Alarm Still Firing (but Where is Toggle? is it On/Off?)
           ↳ Alarm Dies and "Unfortunately, App is not Working"

因此，我们应该使 MainActivity 依赖于 BroadCastReceiver。

解决方案是..让他们使用意图字符串进行通信。

  • 主活动

        private void MRemindMe_Click(object sender, EventArgs e)
{
    intRemind = new Intent(this, typeof(AlarmReceiver));
    //ToggleSwitch
    if (mvibrateSW.Checked)
    {
        intRemind.PutExtra("vChecked", "On");
    }
    //StartReminder 1-6hrs
    pendInt = PendingIntent.GetBroadcast(this, 0, intRemind, PendingIntentFlags.UpdateCurrent);
    alarmManager = (AlarmManager)GetSystemService(AlarmService);
    alarmManager.SetInexactRepeating(AlarmType.ElapsedRealtimeWakeup, SystemClock.ElapsedRealtime() + (1000 * mSeekBar.Progress), (1000 * mSeekBar.Progress), pendInt);
    mCancelNotif.Visibility = ViewStates.Visible;
}

  • 报警接收器

        public override void OnReceive(Context context, Intent intent)
{
    Intent Intent = new Intent(context, typeof(MainActivity));
    PendingIntent BuildPendingIntent = PendingIntent.GetActivity(context, 0, Intent, PendingIntentFlags.CancelCurrent);
    manager = NotificationManager.FromContext(context);
    ISharedPreferences pref = Application.Context.GetSharedPreferences("MyApp", FileCreationMode.Private);
    ISharedPreferencesEditor editor = pref.Edit();
    string VOn = intent.GetStringExtra("vChecked");
    builder = new NotificationCompat.Builder(context)
        .SetAutoCancel(true)
        .SetContentIntent(BuildPendingIntent)
        .SetContentTitle("Remind Me!")
        .SetTicker("Checklist: Remind Me!")
        .SetContentText("It's time to check your CheckList!")
        .SetSmallIcon(Resource.Drawable.Icon)
        .SetVisibility((int)NotificationVisibility.Public)
        .SetFullScreenIntent(BuildPendingIntent, true)
        .SetPriority((int)NotificationPriority.High);
    //Receive Command by String
    string OnVib = intent.GetStringExtra("vChecked");
    if (OnVib == "On")
    {
        builder.SetDefaults((int)NotificationDefaults.Vibrate);
    }
    else
    {
        builder.SetDefaults((int)NotificationDefaults.Lights);
    }
    manager.Notify(0, builder.Build());
}
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