Android Question TabStripView Error

[mik21]

Hi all,
I have downloaded TabStripViewPager demo (https://www.b4x.com/android/forum/threads/tabstripviewpager-better-viewpager.63975/) When the application started the log got me error:
** Activity (main) Create, isFirst = true **
java.lang.NoClassDefFoundError: Failed resolution of: Landroidx/viewpager/widget/ViewPager$OnPageChangeListener;
at anywheresoftware.b4a.objects.TabStripViewPager.DesignerCreateView(TabStripViewPager.java:59)
at anywheresoftware.b4a.objects.CustomViewWrapper.AfterDesignerScript(CustomViewWrapper.java:70)
at anywheresoftware.b4a.keywords.LayoutBuilder.loadLayout(LayoutBuilder.java:162)
at anywheresoftware.b4a.objects.ActivityWrapper.LoadLayout(ActivityWrapper.java:209)
at b4a.example.main._activity_create(main.java:392)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:732)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:351)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:255)
at java.lang.reflect.Method.invoke(Native Method)
at anywheresoftware.b4a.ShellBA.raiseEvent2(ShellBA.java:144)
at b4a.example.main.afterFirstLayout(main.java:105)
at b4a.example.main.access$000(main.java:17)
at b4a.example.main$WaitForLayout.run(main.java:83)
at android.os.Handler.handleCallback(Handler.java:883)
at android.os.Handler.dispatchMessage(Handler.java:100)
at android.os.Looper.loop(Looper.java:221)
at android.app.ActivityThread.main(ActivityThread.java:7520)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
Caused by: java.lang.ClassNotFoundException: androidx.viewpager.widget.ViewPager$OnPageChangeListener
... 21 more

Here is my configurtion path

and the Android SDK Manager for Android 10

I try copy the android-support-v4.jar to library folder but without success. Could you point me to right direction ?

 

[Erel]

Could you point me to right direction ?

Yes. Follow the installation instructions: https://www.b4x.com/b4a.html

 

[mik21]

Thank you very much, it's running like swiss clock