Android Question Problem with the APK signer

[Юра]

Hello everyone.
I tried to compile some program and got this error message from the compiler:

Signing package file (debug key). Error
java.lang.UnsupportedClassVersionError: com/android/apksigner/ApkSignerTool has been
compiled by a more recent version of the Java Runtime (class file version 53.0), this version
of the Java Runtime only recognizes class file versions up to 52.0​

Having read similar topics on this forum I learnd that it needs to update SDKs.
But trying to do so I learned that my SDK manager doesn’t sees any versions of SDK higher then 29. And B4A says that it needs SDK of version 30 or 31.
I have installed on my system (Windows 7 32bit):
Installed SDK platforms: android-14, android-27, android-29
Installed JDKs: jdk-8u201, jdk.80_311
Can anyone help me with this problem?

 

[Erel]

Delete your Android SDK and carefully follow the installation instructions: https://www.b4x.com/b4a.html

 

[agraham]

Installed SDK platforms: android-14, android-27, android-29

The SDK for B4A is slightly differently structured to that required by Android Studio, it has a few additional items. Download the one on Erel's link, unzip with 7-Zip, not Windoows File Explorer, to its own folder and don't run SDK Manager unless you really understand why you might need to.

 

[Юра]

Delete your Android SDK and carefully follow the installation instructions: https://www.b4x.com/b4a.html

But the same program compiles without any problems on lower version of B4A (v8.3) with the same Java and SDK.

 

[Erel]

But the same program compiles without any problems on lower version of B4A (v8.3) with the same Java and SDK.

And???

Delete your Android SDK and carefully follow the installation instructions: https://www.b4x.com/b4a.html