Implementing proper back navigation and home button handling using Toolbar in Android

Question

I am using a single activity and multiple fragments(screenshot attached) within the same activity to provide a seamless navigation. But after implementing the latest toolbar and

Answer 1

Add this in your MainActivity where you are calling Fragments. getBackStackEntryCount() Return number of fragments in the back stack. where the fragment on the bottom of the stack has index 0. popBackStack() Pop the top Fragment off the back stack

 @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();

        if (id == android.R.id.home) {
            if (getSupportFragmentManager().getBackStackEntryCount() == 1) {
                getSupportFragmentManager().popBackStack();
            } else {
                super.onBackPressed();
            }
        }
        return true;
    }

And in your Fragment where you want to go back use this function

  @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == android.R.id.home) {
            getActivity().onBackPressed();
        }
        return true;
    }