Xamarin安卓 - 开关切换开/关振动来自MainActivity的AlarmReceiver中的通知

Question

GrayBark说： “如果你的活动被扼杀并且警报被触发，那么就没有任何活动可以停止铃声。” 如何？？？？

我做了一个简单的通知和切换按钮。

1.首先，我没有包含开关按钮，它工作正常。 我的代码就像这个

• 主要活动

    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; } 

• AlarmReceiver

   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()); } 

2。

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，它可以很好地工作，最小化。但是，当它被杀死时，通知会停止，应用程序将停止工作。 代码是这样的：

AlarmReceiver

        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());

    }

我怎样才能解决这个问题？ 我可以感觉到我的问题在我的鼻子底下..而且，我已经看到了类似的问题，但是我太模糊了解如何通过在切换按钮之间切换来停止播放声音？

Answer 1

最后，我得到了答案，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MainActivity被杀死但是警报触发，因此，由于BroadCastReceiver无法找到Toggle是否已切换，因此警报不会触发

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取决于BroadCastReceiver。

解决方案是..让他们使用Intent Strings进行通信。

• 主要活动

    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; } 

• AlarmReceiver

    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()); }