Caused by java.lang.NullPointerException
Attempt to invoke virtual method 'java.util.Iterator java.util.ArrayList.iterator()' on a null object reference
keyboard_arrow_up
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anywheresoftware.b4a.objects.preferenceactivity$PreferenceScreenWrapper.createPreference (preferenceactivity.java:221)
(preferenceactivity.java:65)
android.app.Activity.performCreate (Activity.java:6876)
android.app.Instrumentation.callActivityOnCreate (Instrumentation.java:1135)
android.app.ActivityThread.performLaunchActivity (ActivityThread.java:3206)
android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:3349)
android.app.ActivityThread.access$1100 (ActivityThread.java:221)
android.app.ActivityThread$H.handleMessage (ActivityThread.java:1794)
android.os.Handler.dispatchMessage (Handler.java:102)
android.os.Looper.loop (Looper.java:158)
android.app.ActivityThread.main (ActivityThread.java:7224)
java.lang.reflect.Method.invoke (Method.java)
com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run (ZygoteInit.java:1230)
com.android.internal.os.ZygoteInit.main (ZygoteInit.java:1120)