Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.util.ArrayList.get(int)' on a null object reference

[osman-teamswork]

This 7bd675b changes already applied in the project, but still getting below exception.

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object java.util.ArrayList.get(int)' on a null object reference
at com.yanzhenjie.album.app.album.GalleryActivity.onCheckedChanged(GalleryActivity.java:107)
at com.yanzhenjie.album.app.gallery.GalleryView.onClick(GalleryView.java:178)
at android.view.View.performClick(View.java:6256)
at android.widget.CompoundButton.performClick(CompoundButton.java:134)
at android.view.View$PerformClick.run(View.java:24697)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Method.java)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)