By this we can make multiple calculation function and many more thing.
For example- To find simple interest and compound interest with the help of CheckBox.
Program is-
public class MainActivity extends AppCompatActivity {
EditText e1, e2, e3, e4;
private CheckBox cb1, cb2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
e1= (EditText) findViewById(R.id.e1);
e2= (EditText) findViewById(R.id.e2);
e3= (EditText) findViewById(R.id.e3);
e4= (EditText) findViewById(R.id.e4);
cb1= (CheckBox) findViewById(R.id.cb1);
cb2= (CheckBox) findViewById(R.id.cb2);
}
public void Perform(View view) {
try {
double result = 0.0;
int p = Integer.parseInt("" + e1.getText());
int r = Integer.parseInt("" + e2.getText());
int t = Integer.parseInt("" + e3.getText());
if (cb1.isChecked()) {
result = (p * r * t) / 100.0;
}
if (cb2.isChecked()) {
double A = p * Math.pow((1 + r / 100.0), t);
result = A - p;
}
if (cb1.isChecked()&cb2.isChecked()) {
double result1 = (p * r * t) / 100.0;
double A = p * Math.pow((1 + r / 100.0), t);
double result2 = A - p;
result= result1+result2;
}
e4.setText("" + result);
} catch (Exception ex) {
System.out.println(ex);
e4.setText(ex.getMessage());
}
}
}
REsult-
