IndexOutOfBoundsException: Invalid index 3, size is 3

[ghost]

Fatal Exception: java.lang.IndexOutOfBoundsException: Invalid index 3, size is 3
at java.util.ArrayList.throwIndexOutOfBoundsException(ArrayList.java:255)
at java.util.ArrayList.get(ArrayList.java:308)
at com.heinrichreimersoftware.materialintro.slide.SlideAdapter.getSlide(SlideAdapter.java:69)
at com.heinrichreimersoftware.materialintro.app.IntroActivity.getSlide(IntroActivity.java:897)
at com.heinrichreimersoftware.materialintro.app.IntroActivity.canGoForward(IntroActivity.java:298)
at com.heinrichreimersoftware.materialintro.app.IntroActivity.nextSlide(IntroActivity.java:257)
at com.heinrichreimersoftware.materialintro.app.IntroActivity$2.onClick(IntroActivity.java:240)
at android.view.View.performClick(View.java:4438)
at android.view.View$PerformClick.run(View.java:18431)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:149)
at android.app.ActivityThread.main(ActivityThread.java:5061)
at java.lang.reflect.Method.invokeNative(Method.java)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:609)
at dalvik.system.NativeStart.main(NativeStart.java)

I have 3 "addSlide" with SimpleSlide.Builder into my IntroActivity

[heinrichreimer]

In theory this could not happen because IntroActivity.nextSlide()already filters out all indices that are out of range. Maybe you should check your NavigationPolicy or overriden canGoForward() methods or update the library to the latest version.
Please keep me updated if that helps.