Android Question How can i solve this error

[Makumbi]

The error belows comes when i try to run my project

B4A Version: 9.00
Parsing code.    (0.26s)
Building folders structure.    (0.09s)
Compiling code.    (2.28s)
Compiling layouts code.    (0.03s)
Organizing libraries.    (0.00s)
Generating R file.    Error
d:\b4a\android-sdk-windows\tools\..\extras\b4a_remote\com\android\support\support-compat\28.0.0\unpacked-support-compat-28.0.0\res\values\values.xml:36: error: Attribute "fontProviderFetchStrategy" already defined with incompatible format.
d:\b4a\android-sdk-windows\tools\..\extras\b4a_remote\androidx\core\core\1.1.0\unpacked-core-1.1.0\res\values\values.xml:127: Original attribute defined here.
d:\b4a\android-sdk-windows\tools\..\extras\b4a_remote\com\android\support\support-compat\28.0.0\unpacked-support-compat-28.0.0\res\values\values.xml:51: error: Attribute "fontProviderFetchTimeout" already defined with incompatible format.
d:\b4a\android-sdk-windows\tools\..\extras\b4a_remote\androidx\core\core\1.1.0\unpacked-core-1.1.0\res\values\values.xml:139: Original attribute defined here.
d:\b4a\android-sdk-windows\tools\..\extras\b4a_remote\com\android\support\support-compat\28.0.0\unpacked-support-compat-28.0.0\res\values\values.xml:61: error: Attribute "fontStyle" already defined with incompatible format.
d:\b4a\android-sdk-windows\tools\..\extras\b4a_remote\androidx\core\core\1.1.0\unpacked-core-1.1.0\res\values\values.xml:147: Original attribute defined here.

 

[Sagenut]

It looks like some problem with your SDK folder.
Try to make a new installation, to a new folder, of the Android SDK and then correct the B4A Paths to point to the new one.
Do not delete this one, just in case.

 

[Erel]

B4A v9.00 doesn't support AndroidX SDK. Support was added in v9.30. You need to use the older SDK.

It is available: https://www.b4x.com/android/forum/threads/99780/#content

 

[Sagenut]

To switch to AndroidX it's needed to Jetify, right?
How is it possible that he Jetified with B4A 9.00 that does not contain the tool?

 

[Erel]

Jetifier is not related to this error.