Android Question how to make app with more than one function/page

Take a look this thread and test the samples

https://www.b4x.com/android/forum/threads/different-examples-with-2-layouts.8416/#post-47102

but if we use more than one activity , when using slidingmenuwrapper, page trantition will shown, but if we make in one activity for 3 or 4 page, it will make the code very long.

All my apps and games use just 1 activity and have (code generated) panels that are shown/hidden when needed.

For me this was the easiest to work with and also a way to get rid of activity side effects (slow creation, unwanted animations etc).

For your long code problem you can always use classes to seperate code parts.

thank's for your all answer