using common Layout and its event in all activities

Question

I have one common layout that has four button at top bar and i am using this layout in all activities by including that common layout in all activities layout by

Answer 1

1. Define a header layout with 4 buttons and define android:onClick attributes inside xml layout for e.g. android:onClick="btnHomeClick", android:onClick="btnSearchClick"....etc.

2. Define an Abstract class by extending Activity and implement all these click method:

   public void btnHomeClick(View v) {
   }
   
   public void btnSearchClick(View v)
   {
   }
   

3. include that header layout by tag in your xml layout files. Now extends the above activity class in your every activity class.

4. this way you just has to define a click event for once.