There are some issues, read
THIS thread.
I have a problem with displaying text in Kitkat
App work normally on Android OS v4.0 and older
If I change only Core.jar get an error message
Where is Core.xml
This happens to me with versions Basic4android v-4.0 and Basic4android v-4.3
B4A version 4:30
Parsing code. 12:01
Compiling code. 12:03
Compiling code layouts. 12:00
Generating R file. 00:04
Compiling generated Java code. error
javac 1.7.0_71
src \ pack \ nsrpengrecnik \ designerscripts \ LS_frmevent.java: 9: error: can not find symbol
public static void LS_general (java.util.LinkedHashMap <String, anywheresoftware.b4a.keywords.LayoutBuilder.ViewWrapperAndAnchor> views, int width, int height, int scale) {
^
symbol: class ViewWrapperAndAnchor
location: class LayoutBuilder
1 error