Assume that we have 3 different activities. Each activity has its own XML file for drawing UI.
In each XML file we have a TextView (but style of each one is different with the others).
I want to know what will happen if i assign same id to each of them for example android:id = "@+id/textView" for all of them.
When you use setContentView(R.layout.yourlayout);
the findViewById() will get the textview from that particular layout only…so you can assign same ids in different activities..