对象定位Android程序的正确方法是什么？

I've watched many tutorials now about how to program for Android - I have even started to create some programs myself. However, I noticed my programs all look like procedural ones, while Java should be working with object orientation. I have been trying to fix this, but I've found a problem. The primary class of my program - the one that's executed at the start of the application (under com.testprogram.www for example) seems to be a mixture of screen and control layers at the same time.I've watched many tutorials now about how to pr