Starting app only if its not currently running

Question

I am sending push notification to users which when clicking on it opens the app.

My problem is that when the app is already open, clicking on the notification start

Answer 1

For those who use Xamarin.Android. The Xamarin version of David Wasser's answer is below:

        //Create notification
        var notificationManager = GetSystemService(Context.NotificationService) as NotificationManager;
        Intent uiIntent = PackageManager.GetLaunchIntentForPackage("com.company.app");

        //Create the notification
        var notification = new Notification(Android.Resource.Drawable.SymActionEmail, title);

        //Auto-cancel will remove the notification once the user touches it
        notification.Flags = NotificationFlags.AutoCancel;

        //Set the notification info
        //we use the pending intent, passing our ui intent over, which will get called
        //when the notification is tapped.
        notification.SetLatestEventInfo(this, title, desc, PendingIntent.GetActivity(this, 0, uiIntent, PendingIntentFlags.OneShot));

        //Show the notification
        notificationManager.Notify(0, notification);

Answer 2

try adding this to your intent to bring activity to front if it is running in the background

Intent intent = new Intent(this, Splash.class); intent.setFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT); PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent, 0);

Answer 3

when notification clicked and your code that redirect to your desire screen just replace that code by calling this method and redirect to particular screen on "true/false" result basis.

    private boolean isAppOnForeground(Context context) {
    ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    List<RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
    if (appProcesses == null) {
      return false;
    }
    final String packageName = context.getPackageName();
    for (RunningAppProcessInfo appProcess : appProcesses) {
      if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_FOREGROUND && appProcess.processName.equals(packageName)) {
        return true;
      }
    }
    return false;
  }

Answer 4

Use Splash as Fragment instead of Activity. Keep Splash fragment(7 seconds), replace the same with the desired one(landing page).

Add launchMode="singleTask" to the manifest.

As already stated by Rahul, onNewIntent() get called if application is already running else onCreate()

@Override
protected void onNewIntent(Intent intent) 
{   
    super.onNewIntent(intent);
}

OR

Go with David's answer, seems promising.

Answer 5

Use a "launch Intent" for your app, like this:

PackageManager pm = getPackageManager();
Intent launchIntent = pm.getLaunchIntentForPackage("your.package.name");
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, launchIntent, 0);

Replace "your.package.name" with the name of your package from the Android manifest.

Also, you should remove the special launchMode="singleTask" from your manifest. Standard Android behaviour will do what you want.