passing value return on else selector

@Override
        public void onActivityCreated(Bundle savedInstanceState) {
            // TODO Auto-generated method stub
            super.onActivityCreated(savedInstanceState);

            Intent i = getActivity().getIntent();
            String fa = i.getStringExtra("faktorAktifitas");
            String kelamin = i.getStringExtra("kelamin");
            String id = i.getStringExtra("id");

            showBahan(fa, id, kelamin);
        }

private void showBahan(String fa, String id, String kelamin) {
            // TODO Auto-generated method stub
            double preAmb;

            lanjutBtn
                = (Button)getView().findViewById(R.id.lanjutBtn);



            if((fa == "Rendah") && (kelamin == "P"))preAmb = 1.56;
            else if((fa == "Rendah") && (kelamin == "P"))preAmb = 1.55;
            else if((fa == "Sedang") && (kelamin == "L"))preAmb = 1.76;
            else if((fa == "Sedang") && (kelamin == "P"))preAmb = 1.7;
            else if((fa == "Berat") && (kelamin == "L"))preAmb = 2.1;
            else preAmb = 2.0;

            lanjut(preAmb, id, kelamin);
        }

private void lanjut(final double preAmb, final String id, final String kelamin) {

            lanjutBtn.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    Toast.makeText(getActivity(), ""+preAmb+" "+id+" "+kelamin, Toast.LENGTH_SHORT).show();
                }
            });
        }