立即顯示活動而不是顯示通知

Question

我試圖使用AlarmManager在當天晚些時候向用戶發送通知，無論他是否正在使用該應用程序。 我基本上粘貼了我在這裏看到的：http://developer.android.com/guide/topics/ui/notifiers/notifications.html，但顯然出現了一些問題，因爲不是顯示通知，而是顯示AndroidLauncher活動。

這裏是我的代碼：

public void planNotification() { 
     AlarmManager am = (AlarmManager)this.getSystemService(Context.ALARM_SERVICE); 

     NotificationCompat.Builder mBuilder = 
       new NotificationCompat.Builder(this) 
       .setSmallIcon(R.drawable.icon) 
       .setContentTitle("My notification") 
       .setContentText("Hello World!"); 

     Intent resultIntent = new Intent(this, AndroidLauncher.class); 

     TaskStackBuilder stackBuilder = TaskStackBuilder.create(this); 
     stackBuilder.addParentStack(AndroidLauncher.class); 
     stackBuilder.addNextIntent(resultIntent); 
     PendingIntent resultPendingIntent = 
       stackBuilder.getPendingIntent(
        0, 
        PendingIntent.FLAG_UPDATE_CURRENT 
       ); 
     mBuilder.setContentIntent(resultPendingIntent); 

     int currentApiVersion = android.os.Build.VERSION.SDK_INT; 

     if (currentApiVersion >= 19) 
      am.setWindow(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, 5000, resultPendingIntent); 
     else 
      am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 86400000, resultPendingIntent); 
    } 

我還是新來的意圖和PendingIntents，所以它可能是一個愚蠢的錯誤。

~~~ ~~~編輯：謝謝你的幫助！現在我知道我需要一個BroadcastReceiver，但我無法使它工作。它看起來像onReceive()永遠不會被稱爲。

這是我的主要活動：

@Override 
    public void planNotification() { 
     AlarmManager am = (AlarmManager)this.getSystemService(Context.ALARM_SERVICE); 

     Intent intent = new Intent(this, AlarmReceiver.class); 
     PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT); 

     int currentApiVersion = android.os.Build.VERSION.SDK_INT; 

     if (currentApiVersion >= 19) 
      am.setWindow(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, 5000, alarmIntent); 
     else 
      am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, alarmIntent); 
    } 

我的廣播接收器：

public class AlarmReceiver extends BroadcastReceiver { 

    @Override 
    public void onReceive(Context context, Intent intent) { 
     System.out.println("ON RECEIVE"); 

     NotificationCompat.Builder mBuilder = 
      new NotificationCompat.Builder(context) 
      .setSmallIcon(R.drawable.icon) 
      .setContentTitle("My notification") 
      .setContentText("Hello World!"); 

     Intent resultIntent = new Intent(context, AndroidLauncher.class); 

     TaskStackBuilder stackBuilder = TaskStackBuilder.create(context); 
     stackBuilder.addParentStack(AndroidLauncher.class); 
     stackBuilder.addNextIntent(resultIntent); 
     PendingIntent resultPendingIntent = 
      stackBuilder.getPendingIntent(
       0, 
       PendingIntent.FLAG_UPDATE_CURRENT 
      ); 
     mBuilder.setContentIntent(resultPendingIntent); 
     NotificationManager mNotificationManager = 
      (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); 
     mNotificationManager.notify(AndroidLauncher.notifId, mBuilder.build()); 
    } 
} 

Answer 1

你有它的方式，報警管理器直接使用resultIntent。

你應該將你的通知創建代碼爲BroadcastReceiver：

public class AlarmReceiver extends BroadcastReceiver{ 
    @Override 
    public void onReceive(Context context, Intent intent) { 
     NotificationCompat.Builder mBuilder = 
      new NotificationCompat.Builder(this) 
      .setSmallIcon(R.drawable.icon) 
      .setContentTitle("My notification") 
      .setContentText("Hello World!"); 

     Intent resultIntent = new Intent(this, AndroidLauncher.class); 

     TaskStackBuilder stackBuilder = TaskStackBuilder.create(this); 
     stackBuilder.addParentStack(AndroidLauncher.class); 
     stackBuilder.addNextIntent(resultIntent); 
     PendingIntent resultPendingIntent = 
      stackBuilder.getPendingIntent(
       0, 
       PendingIntent.FLAG_UPDATE_CURRENT 
      ); 
     mBuilder.setContentIntent(resultPendingIntent); 
     NotificationManager mNotificationManager = 
      (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 
     mNotificationManager.notify(mId, mBuilder.build()); 
    } 
} 

，並使用AlarmManager調用BroadcastReceiver：

Intent intent = new Intent(this, AlarmReceiver.class); 
PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0); 
if (currentApiVersion >= 19) 
    am.setWindow(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 5000, 5000, alarmIntent); 
else 
    am.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis() + 86400000, alarmIntent);