In your layout you can add android:checked=”true” to CheckBox you want to be selected. Or programmatically, you can use the setChecked method defined in the checkable interface: RadioButton b = (RadioButton) findViewById(R.id.option1); b.setChecked(true);
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 … Read more
It seems that the good people at Google/Android assume that when you use RadioButtons, you don’t need the flexibility that comes with every other aspect of the Android UI/layout system. To put it simply: they don’t want you to nest layouts and radio buttons. Sigh. So you gotta work around the problem. That means you … Read more
I’d think a better way is to use RadioGroup and set the listener on this to change and update the View accordingly (saves you having 2 or 3 or 4 etc listeners). RadioGroup radioGroup = (RadioGroup) findViewById(R.id.yourRadioGroup); radioGroup.setOnCheckedChangeListener(new OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup group, int checkedId) { // checkedId is the RadioButton selected } … Read more
you should check the radiobutton in the radiogroup like this: radiogroup.check(IdOfYourButton) Of course you first have to set an Id to your radiobuttons EDIT: i forgot, radioButton.getId() works as well, thx Ramesh EDIT2: android:checkedButton=”@+id/my_radiobtn” works in radiogroup xml
Set equal name attributes to create a group; <form> <fieldset id=”group1″> <input type=”radio” value=”value1″ name=”group1″> <input type=”radio” value=”value2″ name=”group1″> </fieldset> <fieldset id=”group2″> <input type=”radio” value=”value1″ name=”group2″> <input type=”radio” value=”value2″ name=”group2″> <input type=”radio” value=”value3″ name=”group2″> </fieldset> </form>
You should be able to do something like this: int radioButtonID = radioButtonGroup.getCheckedRadioButtonId(); View radioButton = radioButtonGroup.findViewById(radioButtonID); int idx = radioButtonGroup.indexOfChild(radioButton); If the RadioGroup contains other Views (like a TextView) then the indexOfChild() method will return wrong index. To get the selected RadioButton text on the RadioGroup: RadioButton r = (RadioButton) radioButtonGroup.getChildAt(idx); String selectedtext = … Read more