Android ขอรบกวนคำแนะนำหน่อยน่ะครับ เรื่อง RadioButton

String sumw = ("" + (a * m2));
					double sumz2 = Double.parseDouble(sumw);
					
					String sumh = ("" + (b * m3));
					double sumz3 = Double.parseDouble(sumh);
					
					String suma = ("" + (c * m4));
					double sumz4 = Double.parseDouble(suma);
					
					String sum1 = ("" + (m1 + sumz2 + sumz3 - sumz4));
					double sumb = Double.parseDouble(sum1);
					String totals = String.format("%.2f", sumb);
					
					if(r1.isChecked()){
						String sumzb1 = ("" + (sumb * b1));
						double sumbmr = Double.parseDouble(sumzb1);
						String total = String.format("%.2f", sumbmr);
						txtBmr.setText(" " + total + " kcal");
					}
					if(r2.isChecked()){
						String sumzb2 = ("" + (sumb * b2));
						double sumbmr = Double.parseDouble(sumzb2);
						String total = String.format("%.2f", sumbmr);						
						txtBmr.setText(" " + total + " kcal");
					}
					if(r3.isChecked()){
						String sumzb3 = ("" + (sumb * b3));
						double sumbmr = Double.parseDouble(sumzb3);
						String total = String.format("%.2f", sumbmr);
						txtBmr.setText("" + total + " kcal");
					}
					if(r4.isChecked()){
						String sumzb4 = ("" + (sumb * b4));
						double sumbmr = Double.parseDouble(sumzb4);
						String total = String.format("%.2f", sumbmr);
						txtBmr.setText(" " + total + " kcal");
					}