How to get the selected index of a RadioGroup in Android

Question

Is there an easy way to get the selected index of a RadioGroup in Android or do I have to use OnCheckedChangeListener to listen for changes and have something that holds the last index selected   example xml    lt RadioGroup android id    id group1  android layout width  fill parent  android layout height  wrap content  android orientation  vertical  gt       lt RadioButton android id    id radio1  android text  option 1  android layout width  wrap content  android layout height  wrap content    gt       lt RadioButton android id    id radio2  android text  option 2  android layout width  wrap content  android layout height  wrap content    gt       lt RadioButton android id    id radio3  android text  option 3  android layout width  wrap content  android layout height  wrap content    gt       lt RadioButton android id    id radio4  android text  option 4  android layout width  wrap content  android layout height  wrap content    gt       lt RadioButton android id    id radio5  android text  option 5  android layout width  wrap content  android layout height  wrap content    gt   lt  RadioGroup gt    if a user selects option 3 I want to get the index  2

User · Answer

Kotlin    val selectedIndex   radioButtonGroup  indexOfChild    radioButtonGroup  findViewById      radioButtonGroup getCheckedRadioButtonId

User · Answer

You could have a reference to the radio group and use getCheckedRadioButtonId    to get the checked radio button id  Take a look here  RadioGroup radioGroup    RadioGroup findViewById R id radio group     Then when you need to get the selected radio option   int checkedRadioButtonId   radioGroup getCheckedRadioButtonId    if  checkedRadioButtonId    -1           No item selected   else      if  checkedRadioButtonId    R id radio button1               Do something with the button

User · Answer

just use this        int index   2      boolean option3Checked   radioGroup getCheckedRadioButtonId      radioGroup getChildAt 2  getId

User · Answer

try this          RadioGroup  group   RadioGroup  getView   findViewById R id radioGroup           group setOnCheckedChangeListener new RadioGroup OnCheckedChangeListener                  Override             public void onCheckedChanged RadioGroup radioGroup  int i                    View radioButton   radioGroup findViewById i                   int index   radioGroup indexOfChild radioButton

User · Answer

This should work   int index   myRadioGroup indexOfChild findViewById myRadioGroup getCheckedRadioButtonId

User · Answer

you can do   findViewById   from the radio group    Here it is sample      RadioButton my radio group findViewById R id radiobtn veg   setChecked true

User · Answer

Late to the party  but here is a simplification of  Tarek360 s Kotlin answer that caters for RadioGroups that might contain non-RadioButtons      val RadioGroup checkedIndex  Int         get     children              filter   it is RadioButton                indexOfFirst   it id    checkedRadioButtonId    If you re RadioFroup definitely only has RadioButtons then this can be a simple as      private val RadioGroup checkedIndex            children indexOfFirst   it id    checkedRadioButtonId    Then you don t have the overhead of findViewById

User · Answer

You can simply   -declare the radio group and a radio button out of onCreate method  private RadioGroup GrupName  private RadioButton NameButton    -set the view id in the onCreate method  GrupName    RadioGroup  findViewById R id radioGroupid     -take the radiobutton id selected using  int id   GroupName getCheckedRadioButtonId      -use the id to match the buttonselected view  NameButton    RadioButton  findViewById id     -finally get the value of the radio button  String valueExpected   NameButton getText   toString      --- PS  IF YOU WANT AN INT VALUE  THEN YOU CAN CAST IT  int valueExpectedIn   Integer parseInt valueExpected

User · Answer

radioSexGroup    RadioGroup  findViewById R id radioSex   btnDisplay    Button  findViewById R id btnDisplay   btnDisplay setOnClickListener new OnClickListener              Override         public void onClick View v                   get selected radio button from radioGroup             int selectedId   radioSexGroup getCheckedRadioButtonId                   find the radiobutton by returned id             radioSexButton    RadioButton  findViewById selectedId   Toast makeText MainActivity this radioSexButton getText   Toast LENGTH SHORT  show

User · Answer

It worked perfectly for me in this way       RadioGroup radioGroup    RadioGroup  findViewById R id radio group       int radioButtonID   radioGroup getCheckedRadioButtonId        RadioButton radioButton    RadioButton  radioGroup findViewById radioButtonID       String selectedtext    String  radioButton getText

User · Answer

radioSexGroup  RadioGroup findViewById R id radioGroup      btnDisplay  Button findViewById R id button      btnDisplay setOnClickListener new View OnClickListener           Override      public void onClick View v            int selectedId radioSexGroup getCheckedRadioButtonId            radioSexButton  RadioButton findViewById selectedId           Toast makeText MainActivity this radioSexButton getText   Toast LENGTH SHORT  show

User · Answer

use to get the id of selected item  int selectedID   myRadioGroup getCheckedRadioButtonId        get the view of the selected item   View selectedView    View findViewById  selectedID

User · Answer

Here is a Kotlin extension to get the correct position even if your group contains a TextView or any non-RadioButton   fun RadioGroup getCheckedRadioButtonPosition    Int       val radioButtonId   checkedRadioButtonId     return children filter   it is RadioButton            mapIndexed   index  Int  view  View - gt              index to view           firstOrNull               it second id    radioButtonId            first    -1

User · Answer

You can either use OnCheckedChangeListener or can use getCheckedRadioButtonId

User · Answer

All you need is to set values first to your RadioButton  for example   RadioButton radioButton    RadioButton findViewById R id radioButton         radioButton setId 1            some int value   and then whenever this spacific radioButton will be chosen you can pull its value by the Id you gave it with  RadioGroup radioGroup    RadioGroup findViewById R id radioGroup                        int whichIndex   radioGroup getCheckedRadioButtonId      of course the radioButton                                                          should be inside the  radioGroup                                                           in the XML   Cheers

User · Answer

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   r getText   toString

User · Answer

int index selected   radio grp indexOfChild radio grp                  findViewById radio grp getCheckedRadioButtonId

User · Answer

You can use   RadioButton rb    RadioButton  findViewById rg getCheckedRadioButtonId

[java] How to get the selected index of a RadioGroup in Android

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