Android Question NoClassDefFoundError using the AHNavigationDrawer

** Activity (main) Create, isFirst = true **


main_activity_create (java line: 249)


java.lang.NoClassDefFoundError: Failed resolution of: Landroid/support/v4/widget/DrawerLayout$LayoutParams;
    at de.amberhome.navdrawer.NavigationDrawer.Initialize2(NavigationDrawer.java:82)
    at de.amberhome.navdrawer.NavigationDrawer.Initialize(NavigationDrawer.java:67)
    at de.amberhome.NavDrawer.main._activity_create(main.java:249)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:167)
    at de.amberhome.NavDrawer.main.afterFirstLayout(main.java:89)
    at de.amberhome.NavDrawer.main.access$100(main.java:16)
    at de.amberhome.NavDrawer.main$WaitForLayout.run(main.java:74)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:148)
    at android.app.ActivityThread.main(ActivityThread.java:5417)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
Caused by: java.lang.ClassNotFoundException: Didn't find class "android.support.v4.widget.DrawerLayout$LayoutParams" on path: DexPathList[[zip file "/data/app/de.amberhome.NavDrawer-1/base.apk"],nativeLibraryDirectories=[/data/app/de.amberhome.NavDrawer-1/lib/arm, /vendor/lib, /system/lib]]
    at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
    ... 15 more
    Suppressed: java.lang.ClassNotFoundException: android.support.v4.widget.DrawerLayout$LayoutParams
        at java.lang.Class.classForName(Native Method)
        at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
        at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
        ... 16 more
    Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack trace available
--------- beginning of crash