Android Question Error using Preferences - Material Design Preferences by Corwin42

[ernschd]

Hi,

I would like to test the Example of the Material Design Preferences Library, but I'm getting an error message when compiling the app:

...
Generating R file. (0.00s)
Compiling generated Java code. Error
src\de\amberhome\preferenceexample\prefs1.java:17: error: cannot access PreferenceFragmentCompat
public class prefs1 extends de.amberhome.preferences.AppCompatPreferenceActivity implements B4AActivity{
^
class file for androidx.preference.PreferenceFragmentCompat not found
1 error

javac 11.0.1

 

[Erel]

I recommend you to use B4XPreferencesDialog: https://www.b4x.com/android/forum/t...esdialog-cross-platform-forms.103842/#content

but I'm getting an error message when compiling the app

Try to add:

#AdditionalJar: androidx.preference:preference

 

[Peter Simpson]

I think that is also in the SDK manager @ernschd

 

[ernschd]

This delivers:

Compiling layouts code. (0.01s)
Organizing libraries. Error
Maven artifact not found: androidx.preference/preference

In the SDK manager, android:preference:preference (Google Maven) Version 1.1.0, is installed.

 

[ernschd]

In the meantime, I look at the B4XPreferencesDialog.

 

[DonManfred]

In the SDK manager, android:preference:preference (Google Maven) Version 1.1.0, is installed.

You did realized that you have
android.preference:reference installed, but missing is
androidx.preference/preference

These are two different Artifacts. The one installed is from the support library, the missing one is a AndroidX Artifact.

 

[ernschd]

Sorry, that was a typo: androidx preference is installed.
The error Maven artifact not found: androidx.preference/preference is still displayed.

 

[ernschd]

Good news: after reinstalling the development environment including the SDK manager, everything now works as desired.
Many thanks to all for the help.