how to go back to previous fragment on pressing manually back button of individual fragment?

Question

I have only one activity and multiple fragments in my application.

Two main fragment A(left) and B(right).

Answer 1

If you press back image you have to create method first like this

private void Backpresses() {
    getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.contant_main, new Home()).commit();
}

then you have to call like this when you press back image..

 back.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                   Backpresses();

                }
            });

It work fine for me.