ok, My next app will use B4XPages. (But this one I need portrait in activity 1 and landscape in activity 2, It's maybe complex.)
I still want to know why this happened. I found something new. When I use designer modify anything, even if a Text, next time when I deploy the app to my phone, it must crash when goto activity 2, I need to clear app data (always 4.1KB). I use xCustomListView and load 72 small BMP Item, is that take too long the time, that Android kill it? I now set the loadlayout animation to 500ms, It seems better (most cases goto activity 2 don't crash) but I don't know why. (Still when I use designer to modify anything, even if a Text, next time when I deploy the app to my phone, it must crash.)