Android Question Bringing old project back to life

[uorhun54]

I have an old B4A project from 2017 I am getting back to and want to compile & run it with the latest B4A/Android. So I've started clean with all the latest of everything Java, Android, B4A and read the instructions. After finally getting the project to compile and run on my phone, I get the message "This app was built for an older version of Android and may not work properly. Try checking for updates, or contact the developer." message. What else do I have to upgrade to not to get this message? I have warnings like "DoEvents is deprecated..." etc. which I plan to address but will that do it?

 

[Addo]

Hard to say if we don't see the actual project. But related to Doevents as the warning shows to you it is deprecated use sleep instead.. Also check your manifest for the recommended targetsdk version

 

[cheveguerra]

Did you changed the target targetSdkVersion in the manifest? it should be 28 or grater!

 

[DonManfred]

it should be 28 or grater!

For Playstore ist must be 30

 

[Brian Dean]

You do not specifically mention updating your manifest. Does it begin with this line ...

<uses-sdk android:minSdkVersion="14" android:targetSdkVersion="30"/>

 

[agraham]

"This app was built for an older version of Android and may not work properly. Try checking for updates, or contact the developer."

This is a standard message from Android meaning that the target SDK of the app is not that of the API level of the Android device. It is meaningless and only appears once. If the app works OK then ignore it.

 

[agraham]

Erel's tutorials on Resumable Subs

[B4X] Resumable Subs - Sleep / Wait For

New video tutorial: Resumable subs is a new feature added in B4J v5.50 / B4i v4.00 / B4A v7.00. It dramatically simplifies the handling of asynchronous tasks. (This feature is a variant of stackless coroutines.) The special feature of resumable subs is that they can be paused, without...

www.b4x.com

[B4X] Resumable subs that return values (ResumableSub)

Remember that that a call to Sleep or Wait For in a resumable sub causes the code flow to return to the parent. Example: Sub Button1_Click Sum(1, 2) Log("after sum") End Sub Sub Sum(a As Int, b As Int) Sleep(100) 'this will cause the code flow to return to the parent Log(a + b) End Sub...

www.b4x.com

My explanation about what's happening

[B4X] How Resumable Subs work

This document is intended to add a little understanding as to how Resumable Subs actually work under the bonnet and is intended as a complement to how they are used as Erel explains in his tutorials. Note that the following applies equally to B4A, B4I and B4J. At the heart of the main thread of...

www.b4x.com