java.lang.NoClassDefFoundError: com.wdullaer.materialdatetimepicker.R$string

[egemendurmus]

hi ; i try this libs works lolipop but in in kitkat not works it gives this error what is the cause this ;

java.lang.NoClassDefFoundError: com.wdullaer.materialdatetimepicker.R$string
at com.wdullaer.materialdatetimepicker.date.DatePickerDialog.(DatePickerDialog.java:137)
at com.wdullaer.materialdatetimepicker.date.DatePickerDialog.newInstance(DatePickerDialog.java:189)
at com.example.egemendurmus.deneme.current_order.ViewPagerAdapter.instantiateItem(ViewPagerAdapter.java:237)
at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:943)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1091)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1025)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1545)
at android.view.View.measure(View.java:16497)

[wdullaer]

Try a build clean

[egemendurmus]

I found cause it is crashed with com.facebook.android:facebook-android-sdk:4.15.0 why give this error ?

[wdullaer]

This is pretty clearly an issue with your code / build chain, rather than this library.
Java stacktraces and build time errors are notoriously vague.