Resume my android app from Notification bar (and app icon still shows in bar)

Question

I want to resume my app, exactly at where I left from notification icon in bar. Then I used this code:

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

    resultIntent.setAction(Intent.ACTION_MAIN);
    resultIntent.addCategory(Intent.CATEGORY_LAUNCHER);
    resultIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    PendingIntent resultPendingIntent = PendingIntent.getActivity( this, 0, resultIntent, PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
            .setSmallIcon(R.drawable.ic_speed)
            .setContentTitle(getString(R.string.app_name))
            .setContentText(getString(R.string.txt_welcome))
            .setAutoCancel(true).setDefaults(Notification.DEFAULT_LIGHTS).setWhen(System.currentTimeMillis())
            .setOngoing(true);
    builder.setContentIntent(resultPendingIntent);
    NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    mNotificationManager.notify(0, builder.build());

It works well, the issue is when I press the icon in notification bar, it disappears, I need it to stay there.

Of course, if I delete these three lines:

resultIntent.setAction(Intent.ACTION_MAIN);
resultIntent.addCategory(Intent.CATEGORY_LAUNCHER);
resultIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

in manifest.xml

<activity android:name=".MainActivity"
          android:launchMode="singleInstance"
          android:screenOrientation="portrait"/>

the icon won't disappear after clicking on it, but I always redirect to MainActivity, not the same place I left (when app got into pause).

any idea?

Answer 1

Try setting :

setAutoCancel(false)

Reference : https://developer.android.com/reference/android/app/Notification.Builder.html#setAutoCancel(boolean)

Hope it helps !

Edit :

As per discussion, need to set in manifest :

android:launchMode="singleTop" 

This will deliver new intent to "onNewIntent" function which can be used to do further actions in case your activity was already running.