How to call an alert when the app is in the background?

Question

I have an app that use the gps in the background, and in some situations I want to show an alert when the app is in the background: https://github.com/Tapadoo/Alerter

and works fine in the foreground but doesnt work in the background, how can i show that in background? here is my code:

                    Alerter.create(MainActivity.this)
                        .setTitle("Alert Title")
                        .setText("Alert text...")
                        .show();

check this out https://stackoverflow.com/questions/3667022/checking-if-an-android-application-is-running-in-the-background — Achal Urankar, Mar 09 '22 at 15:23
@AchalUrankar what is the use of checking if my app is in foreground or backgroun? — Ricardo Casimiro, Mar 09 '22 at 15:37
if app goes in background you ll receive an event and then you can generate a notification telling user app wont work in background or maybe start a foreground service that will make your app run — Achal Urankar, Mar 09 '22 at 15:42

Darkman · Answer 1 · 2022-03-09T14:45:08.610

0

To deal with anything related to UIs, use Handler.

Option 1

new Handler(Looper.getMainLooper()).post(new Runnable() {
  public void run() {
    Alerter.create(MainActivity.this)
    .setTitle("Alert Title")
    .setText("Alert text...")
    .show();
  }
});

Option 2

new Handler(Looper.getMainLooper(), new Handler.Callback() {
  public boolean handleMessage(Message msg) {
   Alerter.create(MainActivity.this)
    .setTitle("Alert Title")
    .setText("Alert text...")
    .show();
    return true;
  }
}).sendEmptyMessage(0);

edited Mar 09 '22 at 14:45

answered Mar 09 '22 at 14:05

Darkman

2,941
2
9
14

doesn't work :c – Ricardo Casimiro Mar 09 '22 at 14:27
@RicardoCasimiro -- You might wanna try the other one. – Darkman Mar 09 '22 at 14:45
still doesn't work :c now i'm trying this https://developer.android.com/training/notify-user/time-sensitive – Ricardo Casimiro Mar 09 '22 at 15:06

score 0 · Answer 2 · answered Mar 09 '22 at 14:12

You need the app to be on the foreground to access the Main Thread to display an AlertDialog on the UI. When your app is in the background it cannot access the UI but you can use the Handler suggested above by @Darkman.

You can also launch a notification instead.

score 0 · Answer 3 · answered Mar 10 '22 at 06:53

0

You can use local notification instead of using alert dialog.Please try below link for more information related to notifications.

Local Notifications in Android?

answered Mar 10 '22 at 06:53

Sumit Kumar

263
1
6

How to call an alert when the app is in the background?

3 Answers3