Android : Return to previous fragment on back press

Question

I have implemented Navigation Drawer which is a subclass of Activity. I have many fragments in my application. My question goes here

Imagine there are 3 fragments :

Answer 1

Use this code on tab change in your main activity to clear the stack.

int count = getFragmentManager().getBackStackEntryCount();
        if(count>0){
            for (int i = 0; i 

Then on Back pressed of your main activity do this

 int count = getFragmentManager().getBackStackEntryCount();

     if (count == 0) {
         super.onbackpressed();
        }
else {
        getFragmentManager().popBackStack();
    }
 }