Android Notification open currently running app instead of creating a new process?

Question

Im receiving a push notification with a custom Uri scheme: myapp://main

In my onReceive i create a notification:

public void createNotification(Context context, String title, String message, String summary, Uri uri) {
    Notification.Builder notification = new Notification.Builder(context)
            .setContentTitle(title)
            .setContentText(message)
            .setSmallIcon(R.drawable.ic_launcher)
            .setDefaults(Notification.DEFAULT_LIGHTS)
            .setAutoCancel(true);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN && summary != null)
        notification.setSubText(summary);


    Intent intent = new Intent("android.intent.action.VIEW", uri);
    PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, 0);
    notification.setContentIntent(pendingIntent);

    Notification noti;
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)
        noti = notification.build();
    else
        noti = notification.getNotification();

    NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
    notificationManager.notify(0, noti);
}

When I then tap on that notification it opens a new Activity which is my MainActivity. But it seems like it creates a whole new process aswell instead of just opening my currently running app.

Are there some flags Im missing?

is your app in the background then it should open the same instance. If it is somehow killed by the system then it will create a new process — Murtaza Khursheed Hussain, Oct 30 '15 at 11:28
you can also set activity mode to `single_task` in your manifest so it will always work like a singleton — Murtaza Khursheed Hussain, Oct 30 '15 at 11:29
@MurtazaKhursheedHussain How do I do that? Sorry Im new to Android. — Arbitur, Oct 30 '15 at 11:30
in your `` tag in manifest. `android:launchMode=["multiple" | "singleTop" |"singleTask" | "singleInstance"]` http://developer.android.com/guide/topics/manifest/activity-element.html — Murtaza Khursheed Hussain, Oct 30 '15 at 11:31
@MurtazaKhursheedHussain This works! Now Im just wondering how I can get the parameters from the Uri? Because onCreate wont get called anymore. — Arbitur, Oct 30 '15 at 12:20

ruike · Answer 1 · 2015-10-30T11:48:51.280

1

You can set Intent as follow，the Intent action and category match with you specify in AndroidManifest.xml

 Intent intent = new Intent()  
            .setAction(Intent.ACTION_VIEW)  
            .addCategory(Intent.CATEGORY_DEFAULT)  
            .addCategory(Intent.CATEGORY_BROWSABLE)
            .setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |
                    Intent.FLAG_ACTIVITY_SINGLE_TOP) 
            .setPackage(getPackageName())
            .setData(uri);

edited Oct 30 '15 at 11:48

answered Oct 30 '15 at 11:25

ruike

11
4

This works! Now Im just wondering how I can get the parameters from the Uri? Because onCreate wont get called anymore. – Arbitur Oct 30 '15 at 12:03
If this activity instance is exist, The android system call onNewIntent(), Otherwise it call onCreate() – ruike Nov 02 '15 at 02:18

score 1 · Accepted Answer · answered Oct 30 '15 at 12:32

1

There are LaunchModes for Activity

android:launchMode=["multiple" | "singleTop" |"singleTask" | "singleInstance"]

Android Notification open currently running app instead of creating a new process?

2 Answers2