How to set OnClickListener on a RadioButton in Android

Question

I have two RadioButtons inside a RadioGroup  I want to set OnClickListener on those RadioButtons  Depending on which RadioButton is clicked  I want to change the text of an EditText  How can I achieve this

User · Answer

The question was about Detecting which radio button is clicked  this is how you can get which button is clicked  final RadioGroup radio    RadioGroup  dialog findViewById R id radioGroup1           radio setOnCheckedChangeListener new OnCheckedChangeListener                   Override             public void onCheckedChanged RadioGroup group  int checkedId                     View radioButton   radio findViewById checkedId                   int index   radio indexOfChild radioButton                       Add logic here                  switch  index                    case 0     first button                      Toast makeText getApplicationContext     Selected button number     index  500  show                        break                  case 1     secondbutton                      Toast makeText getApplicationContext     Selected button number     index  500  show                        break

User · Answer

Hope this will help you     RadioButton rb    RadioButton  findViewById R id yourFirstRadioButton   rb setOnClickListener first radio listener     and  OnClickListener first radio listener   new OnClickListener      public void onClick View v         Your Implementaions

User · Answer

For Kotlin Here is added the lambda expression and Optimized the Code       radioGroup setOnCheckedChangeListener   radioGroup  optionId - gt          run               when  optionId                    R id radioButton1 - gt                           do something when radio button 1 is selected                                   R id radioButton2 - gt                           do something when radio button 2 is selected                                      add more cases here to handle other buttons in the your RadioGroup                                 Hope this will help you  Thanks

User · Answer

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

User · Answer

You could also add listener from XML layout  android onClick  onRadioButtonClicked  in your  lt RadioButton  gt  tag    lt RadioButton android id    id radio pirates      android layout width  wrap content      android layout height  wrap content      android text   string pirates      android onClick  onRadioButtonClicked   gt    See Android developer SDK- Radio Buttons for details

User · Answer

Just in case someone else was struggeling with the accepted answer   There are different OnCheckedChangeListener-Interfaces  I added to first one to see if a CheckBox was changed   import android widget CompoundButton OnCheckedChangeListener    vs  import android widget RadioGroup OnCheckedChangeListener    When adding the snippet from Ricky I had errors       The method setOnCheckedChangeListener RadioGroup OnCheckedChangeListener  in the type RadioGroup is not applicable for the arguments  new CompoundButton OnCheckedChangeListener        Can be fixed with answer from Ali    new RadioGroup OnCheckedChangeListener

User · Answer

RadioGroup radioGroup    RadioGroup  findViewById R id yourRadioGroup            radioGroup setOnClickListener v - gt                               get selected radio button from radioGroup                         int selectedId   radioGroup getCheckedRadioButtonId                               find the radiobutton by returned id                         radioButton    findViewById selectedId                           String slectedValue radioButton getText

User · Answer

radioGroup setOnCheckedChangeListener new RadioGroup OnCheckedChangeListener                 public void onCheckedChanged RadioGroup group  int checkedId                   checkedId is the RadioButton selected             RadioButton rb  RadioButton findViewById checkedId               textViewChoice setText  You Selected     rb getText                   Toast makeText getApplicationContext    rb getText    Toast LENGTH SHORT  show

User · Answer

Since this question isn t specific to Java  I would like to add how you can do it in Kotlin   radio group id setOnCheckedChangeListener   radioGroup  optionId - gt            when  optionId                R id radio button 1 - gt                       do something when radio button 1 is selected                              add more cases here to handle other buttons in the RadioGroup                      Here radio group id is the assigned android id of the concerned RadioGroup  To use it this way you would need to import kotlinx android synthetic main your layout name   in your activity s Kotlin file  Also note that in case the radioGroup lambda parameter is unused  it can be replaced with    an underscore  since Kotlin 1 1

[android] How to set OnClickListener on a RadioButton in Android?

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