How to check if a radiobutton is checked in a radiogroup in Android?

Question

I need to set validation that user must fill / select all details in a page. If any fields are empty wanna show Toast message to fill. Now I need set validation for RadioButton in the RadioGroup. I tried this code but didn't work properly. Suggest me correct way. Thankyou.

// get selected radio button from radioGroup int selectedId = gender.getCheckedRadioButtonId(); // find the radiobutton by returned id selectedRadioButton = (RadioButton)findViewById(selectedId); // do what you want with radioButtonText (save it to database in your case) radioButtonText = selectedRadioButton.getText().toString();  if(radioButtonText.matches("")) {     Toast.makeText(getApplicationContext(), "Please select Gender", Toast.LENGTH_SHORT).show();     Log.d("QAOD", "Gender is Null"); } else {     Log.d("QAOD", "Gender is Selected"); } 

Answer 1

If you want to check on just one RadioButton you can use the isChecked function

if(radioButton.isChecked()) {   // is checked     } else {   // not checked } 

and if you have a RadioGroup you can use

if (radioGroup.getCheckedRadioButtonId() == -1) {   // no radio buttons are checked } else {   // one of the radio buttons is checked }