Android Question Prevent running more than one instance of the same APP

Pendrush said:

I don't think it is possible to run more then one instance of any app.
There is option on some devices as Xiaomi "second space" that allow two different installation of same app on same device, but you cannot see "other" space from your app, so you cannot prevent two different installation.

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Pedro Caldeira said:

I need to prevent my app to run more than one time.
Is there a way to check if the App is running and prevent from being launched again, by clicking its icon ?

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artsoft said:

I know this is an old thread - but please allow my to answer here!

@Pendrush This is not correct completely!

When I start my app with a foreground service (together with a notification icon and message in the message bar), I can go back to my app by clicking the notification.

But when I remove my app from task list and click to the normal app icon which is located on my home screen, I can start a second instance of my app.

And I guess this is exactly what @Pedro Caldeira means.

I also have a XIAOMI Redmi Note 10Pro smartphone. And this fact (the starting of a second instance of my app) is really stupid in the OS!

best regards
ARTsoft

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edgar_ortiz said:

Did you find a solution to this problem?

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artsoft said:

But when I remove my app from task list and click to the normal app icon which is located on my home screen, I can start a second instance of my app.

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Pendrush said:

I don't think it is possible to run more then one instance of any app.

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Serge Bertet said:

When I was developping app for Windows using Delphi the solution was to write a key in Windows register at the begining and then remove it at the end.
A launched app reading that key stops immediately when reading this key.

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Magma said:

@emexes
0 - When App starting
1 - When is in sub....
2 - sub 2...
3 - When app closing

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emexes said:

How did you handle situations where your app didn't finish normally (eg power failure) and thus didn't remove the registry key at the end?

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Erel said:

This happens when Android creates a new instance of the activity instead of reusing the previous one.

You can try to set the task mode to singleTask:

B4X:

SetApplicationAttribute(android:launchMode,  singleTask)

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