Hi This simple app works well in companion and when built and installed in one of my devices with Android11. But when built in other device with Android 4 it gives a runtime error (If somebody wants to try, please remember that It's necessary to edit the build link to delete the "s" from https://) …

[image] Martin_Herraiz: It seems that (as Tim said) the runtime error happens (at old Android versions only) when File .Exists block is called and the ASD path is still not created. No. It doesn't matter whether the ASD exists or not. Try this one: Arranque2b.aia (2.6 KB) build the APK and …

File .Exists gives runtime error in Android<4.4, if the File component doesn't requests read/write permissions

MIT App Inventor Help

Anke February 27, 2024, 9:27pm 45

Did you enable the "developer options" on you test device?

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Verbindung via USB zum Tablet für App-Tests (statt QR Code und AI Companion)