Android RadioButton IsSelected is not working

Question

I have a radio group defined with two buttons for black and color. When I try to do a calculation based on the selection nothing happens. Any idea why my radio buttons arent' working? Thanks

                public void onClick(View v) {
                // TODO Auto-generated method stub
                EditText startingAmt = (EditText) findViewById(R.id.editText1);
                RadioButton black = (RadioButton) findViewById(R.id.radio0);
                RadioButton color = (RadioButton) findViewById(R.id.radio1);
                if(!TextUtils.isEmpty(startingAmt.getText().toString().trim())){


                TextView ***** = (TextView)findViewById(R.id.textView1);
                double  temp1 = 0.0,
                        endAmt = 0.0,
                        startAmt = 0.0;
                String answer;
                Editable editableValue1 = startingAmt.getText();
                startAmt = Double.parseDouble(editableValue1.toString());
                if(color.isSelected()){
                    temp1 = startAmt * 1.15;
                    endAmt = temp1 * .15;
                    endAmt = (double)Math.round(endAmt*10)/10;
                }
                if(black.isSelected()){
                    temp1 = startAmt * 1.10;
                    endAmt = temp1 * .10;
                    endAmt = (double)Math.round(endAmt*10)/10;
                }

Answer 1

Instead using isSelected() go for isChecked().

Answer 2

Use the method isChecked instead of isSelected. Or you can use the getCheckedRadioButtonId on your RadioGroup that contains the two RadioButtons.