Android back button not working in fragment

Question

I am new to android, I am called fragment_1 from my MianActivity then I am called fragment_2 from fragment_1. That is working fine. When I Press back button from fragment_2 it's not working (I want to go back to fragment_1)

   Fragment someFragment = new Fragment2();
   FragmentTransaction transaction = getFragmentManager().beginTransaction();
   transaction.replace(R.id.relative_layout_to_replace, someFragment );
   transaction.addToBackStack(null);
   transaction.commit();

Answer 1

This code worked for me

@Override
public void onBackPressed(){
  if (getSupportFragmentManager().getBackStackEntryCount() == 1){
    finish();
  }
  else {
    super.onBackPressed();
  }
}