How to set radio button checked as default in radiogroup

Question

I have created  RadioGroup and RadioButton dynamically as following   RadioGroup radioGroup   new RadioGroup context                       RadioButton radioBtn1   new RadioButton context                       RadioButton radioBtn2   new RadioButton context                       RadioButton radioBtn3   new RadioButton context                        radioBtn1 setText  Less                        radioBtn2 setText  Normal                        radioBtn3 setText  More                         radioBtn2 setChecked true                        radioGroup addView radioBtn1                       radioGroup addView radioBtn2                       radioGroup addView radioBtn3     Here step radioBtn2 setChecked true   causes radioBtn2 always checked  That means I cannot uncheck radioBtn2 by checking other two radio buttons  radioBtn1 radioBtn3   I want to make that RadioGroup can check only one radio button at a time  Now it can check two radiobutton at a time    How can I solve this problem

User · Answer

There was same problem in my Colleague s code  This sounds as your Radio Group is not properly set with your Radio Buttons  This is the reason you can multi-select the radio buttons  I tried many things  finally i did a trick which is wrong actually  but works fine    for   int i   0   i  lt  myCount   i           if   i    k                 System out println    i       i            radio1 i  setChecked false             Here I set one for loop  which checks for the available radio buttons and de-selects every one except the new clicked one  try it

User · Answer

In the XML file set the android checkedButton field in your RadioGroup  with the id of your default RadioButton     lt RadioGroup              android checkedButton    id button 1  gt        lt RadioButton         android id    id button 1                 gt        lt RadioButton         android id    id button 2                 gt        lt RadioButton         android id    id button 3                 gt   lt  RadioGroup gt

User · Answer

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

User · Answer

RadioGroup radioGroup   new RadioGroup WvActivity this       RadioButton radioBtn1   new RadioButton this       RadioButton radioBtn2   new RadioButton this       RadioButton radioBtn3   new RadioButton this        radioBtn1 setText  Less        radioBtn2 setText  Normal        radioBtn3 setText  More          radioGroup addView radioBtn1       radioGroup addView radioBtn2       radioGroup addView radioBtn3        radioGroup check radioBtn2 getId

User · Answer

It s a bug of RadioGroup  RadioButton radioBtn2   new RadioButton context     radioBtn2 without viewId  and generateViewId is in onChildViewAdded    public void onChildViewAdded View parent  View child        if  parent    RadioGroup this  amp  amp  child instanceof RadioButton            int id   child getId               generates an id if it s missing         if  id    View NO ID                id   View generateViewId                child setId id                       RadioButton  child  setOnCheckedChangeWidgetListener                  mChildOnCheckedChangeListener              if  mOnHierarchyChangeListener    null            mOnHierarchyChangeListener onChildViewAdded parent  child             so  first radioGroup addView radioBtn2   then radioBtn2 setChecked true      Like this   RadioGroup radioGroup   new RadioGroup context   RadioButton radioBtn1   new RadioButton context   RadioButton radioBtn2   new RadioButton context   RadioButton radioBtn3   new RadioButton context    radioBtn1 setText  Less    radioBtn2 setText  Normal    radioBtn3 setText  More     radioGroup addView radioBtn1   radioGroup addView radioBtn2   radioGroup addView radioBtn3    radioBtn2 setChecked true

User · Answer

Add android checked    true  in your activity xml

User · Answer

In case for xml attribute its android checkedButton which takes the id of the RadioButton to be checked    lt RadioGroup         android checkedButton    id IdOfTheRadioButtonInsideThatTobeChecked       gt      lt  RadioGroup gt

User · Answer

RadioGroup radioGroup   new RadioGroup context   RadioButton radioBtn1   new RadioButton context   RadioButton radioBtn2   new RadioButton context   RadioButton radioBtn3   new RadioButton context    radioBtn1 setText  Less    radioBtn2 setText  Normal    radioBtn3 setText  More     radioGroup addView radioBtn1   radioGroup addView radioBtn2   radioGroup addView radioBtn3   radioBtn2 setChecked true

[android] How to set radio button checked as default in radiogroup?

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