Android Question java.lang.RuntimeException: java.lang.UnsupportedOperationException: Failed to resolve attribute at index 6: TypedValue{t=0x2/d=0x101009b a=1}

Hard to say. Start with this example: AppCompat with ToolBar - minimal example

Does it work?

I tried to run the example you recommended.
This example also raises an error:
java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/view/ViewConfigurationCompat;

I've been trying to fix this error for a long time, followed all your advice from this thread: https://www.b4x.com/android/forum/t...pport-v4-view-viewconfigurationcompat.117655/

What will you advice me ?

Volodya1000 said:

What will you advice me ?

Click to expand...

Carefully follow the installation instructions and everything will work: https://www.b4x.com/b4a.html