E/AndroidRuntime: FATAL EXCEPTION: main
Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.
Solucionado
E/AndroidRuntime: FATAL EXCEPTION: main
Caused by: java.lang.IllegalStateException: You need to use a Theme.AppCompat theme (or descendant) with this activity.Troque (em AndroidManifest.xml):
android:theme="@android:style/Theme.NoTitleBar.Fullscreen"Por:
android:theme="@style/Theme.AppCompat.NoActionBar"