I am working on a blood donation app. All functions are working but close application function is not working. It is working while other screen are not opened but when i open another screen & came back and try to close app , it will close and opens again in previous screen. Blood_Camp.aia (57.2 KB) […

Your have not placed blocks properly. Try this… [IMG_20200309_200401] [IMG_20200309_200421] Place this both blocks in Screen 1. Note. Timer value : ‘5000’

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Taifun July 4, 2020, 6:56pm 18

How to switch screens correctly Guides

I see many issues done by users because they switched screens not correct. This below is now just one of many other solutions: [blocks] If you dont open/close screens correct your app will get possible runtime errors. Possible errors: (example) Unable to add window -- token android.os.BinderProxy@45d459c0 is not valid; is your activity running? Iam sure you don’t want that. Then please do it in the future and switch screens correct. General Tips and Tricks for App Inventor/Makeroid …

Taifun

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Close application not working