Xamarin安卓系統 - 開關切換開/關MainActivity中AlarmReceiver中通知的振動

Question

GrayBark說：「如果您的活動中斷並且警報被觸發，則不會打開任何活動來停止鈴聲。如何？

我做了一個簡單的通知和切換按鈕。

1.首先，我沒有包含開關按鈕，它工作正常。我的代碼 是這樣一個

• MainActivity

  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.

然後我終於添加了一個開關切換按鈕。當應用程序處於活動狀態時，它工作得很好，最小化。但是，當它被殺死時，通知停止並且應用程序停止工作。 代碼是這樣的：

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()); 

    } 

我該如何解決這個問題？我可以感覺到我的問題是在我的鼻子下。另外，我也看到類似的問題，但它對我來說太模糊了 How do I stop playing sound by switching between toggle button?

Answer 1

最後，我能夠得到答案，謝謝上帝.. 首先，要了解問題......我的BroadCastReceiver似乎她依賴於MainActivity。正如上面提到的：

如果切換振動切換然後MainActivity被殺死，但火警，報警therfore不會火，因爲廣播接收器無法找到切換是否開啓或不

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" 

因此我們應該讓MainActivity取決於BroadCastReceiver。

解決方案是..讓他們使用意圖字符串進行通信。

• MainActivity

  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()); 
  
  }