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

User · Answer

try to use this   lt RadioGroup     android layout width  wrap content      android layout height  wrap content             android orientation  horizontal   gt           lt RadioButton         android id    id standard delivery          android layout width  wrap content          android layout height  wrap content          android text   string Standard delivery          android checked  true          android layout marginTop  4dp          android layout marginLeft  15dp          android textSize  12dp          android onClick  onRadioButtonClicked           gt        lt RadioButton         android layout width  wrap content          android layout height  wrap content          android text   string Midnight delivery          android checked  false          android layout marginRight  15dp          android layout marginTop  4dp          android textSize  12dp          android onClick  onRadioButtonClicked          android id    id midnight delivery        gt       lt  RadioGroup gt    this is java class  public void onRadioButtonClicked View view               Is the button now checked          boolean checked     RadioButton  view  isChecked                Check which radio button was clicked         switch view getId                  case R id standard delivery                  if  checked                      Toast makeText DishActivity this   standard delivery  Toast LENGTH LONG  show                        break              case R id midnight delivery                  if  checked                      Toast makeText DishActivity this   midnight delivery  Toast LENGTH LONG  show                        break

User · Answer

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

User · Answer

mRadioGroup setOnCheckedChangeListener new RadioGroup OnCheckedChangeListener              Override         public void onCheckedChanged RadioGroup radioGroup  int i                if  mRadioButtonMale isChecked                      text    quot male quot                 else                   text    quot female quot                                    OR  mRadioGroup setOnCheckedChangeListener new RadioGroup OnCheckedChangeListener              Override         public void onCheckedChanged RadioGroup radioGroup  int i                if  mRadioButtonMale isChecked      text    quot male quot                 if mRadioButtonFemale isChecked      text    quot female quot

User · Answer

I used the id s of my radiobuttons to compare with the id of the checkedRadioButton that I got using mRadioGroup getCheckedRadioButtonId    Here is my code   mRadioButton1  RadioButton findViewById R id first   mRadioButton2  RadioButton findViewById R id second   mRadioButton3  RadioButton findViewById R id third   mRadioButton4  RadioButton findViewById R id fourth    mNextButton  Button findViewById R id next button    mNextButton setOnClickListener new View OnClickListener          Override     public void onClick View v            int selectedId mRadioGroup getCheckedRadioButtonId             int n 0          if selectedId  R id first  n 1            else if selectedId  R id second  n 2            else if selectedId  R id third  n 3            else if selectedId  R id fourth  n 4

User · Answer

All you need to do is use getCheckedRadioButtonId   and isChecked   method   if gender getCheckedRadioButtonId    -1        Toast makeText getApplicationContext     Please select Gender   Toast LENGTH SHORT  show      else          get selected radio button from radioGroup     int selectedId   gender getCheckedRadioButtonId           find the radiobutton by returned id     selectedRadioButton    RadioButton findViewById selectedId       Toast makeText getApplicationContext    selectedRadioButton getText   toString     is selected   Toast LENGTH SHORT  show        https   developer android com guide topics ui controls radiobutton html

User · Answer

My answer is according to the documentation  which works fine   1  In xml file include android onClick  onRadioButtonClicked  as shown below    lt RadioGroup android id    id rg1  android layout width  match parent  android layout height  wrap content  android orientation  vertical  android gravity  center  gt   lt RadioButton     android id    id b1      android layout width  match parent      android layout height  wrap content      android text  onCreateOptionsMenu        android onClick  onRadioButtonClicked                gt   lt RadioButton     android id    id b2      android layout width  match parent      android layout height  wrap content      android text  onCreateMenu        android onClick  onRadioButtonClicked                gt   lt  RadioGroup gt    2  In Java file implement onRadioButtonClicked method outside onCreate   method as shown below   public void onRadioButtonClicked View view           Is the button now checked      boolean checked     RadioButton  view  isChecked            Check which radio button was clicked     switch view getId              case R id b1              if  checked                                Log e  b1    b1                     break                        case R id b2              if  checked                  break

User · Answer

I used the following and it worked for me  I used a boolean validation function where if any Radio Button in a Radio Group is checked  the validation function returns true and a submission is made  if returned false  no submission is made and a toast to  Select Gender  is shown    MainActivity java  public class MainActivity extends AppCompatActivity       private RadioGroup genderRadioGroup        Override     protected void onCreate Bundle savedInstanceState        super onCreate savedInstanceState       setContentView R layout activity main          Initialize Radio Group And Submit Button     genderRadioGroup findViewById R id gender radiogroup       AppCompatButton submit   findViewById R id btnSubmit          Submit Radio Group using Submit Button     submit setOnClickListener new View OnClickListener              Override         public void onClick View v                  Check Gender radio Group For Selected Radio Button             if genderRadioGroup getCheckedRadioButtonId    -1    No Radio Button Is Checked                 Toast makeText getApplicationContext     Please Select Gender   Toast LENGTH LONG  show                 else   Radio Button Is Checked                 RadioButton selectedRadioButton   findViewById genderRadioGroup getCheckedRadioButtonId                     gender   selectedRadioButton    null        selectedRadioButton getText   toString   trim                                Validate             if  validateInputs                        code to proceed when Radio button is checked                                     Validation - No process is initialized if no Radio button is checked     private boolean validateInputs             if  genderRadioGroup getCheckedRadioButtonId    -1                return false                    return true           In activity main xml    lt LinearLayout         android layout width  match parent          android layout height  wrap content          android orientation  horizontal  gt        lt TextView             android layout width  wrap content              android layout height  wrap content              android text   string gender   gt        lt RadioGroup             android id    id gender radiogroup              android layout width  wrap content              android layout height  wrap content              android orientation  horizontal  gt            lt RadioButton                 android id    id male                  android layout width  wrap content                  android layout height  wrap content                  android text   string male   gt            lt RadioButton                 android id    id female                  android layout width  wrap content                  android layout height  wrap content                  android text   string female    gt        lt  RadioGroup gt        lt android support v7 widget AppCompatButton         android id    id btnSubmit          android layout width  match parent          android layout height  wrap content          android text   string submit   gt    lt  LinearLayout gt     If no gender radio button is selected  then the code to proceed will not run   I hope this helps

User · Answer

Try to use the method isChecked     Like      selectedRadioButton isChecked   -  returns boolean    Refere here for more details on Radio Button

User · Answer

Use the isChecked   function for every radioButton you have to check   RadioButton maleRadioButton  femaleRadioButton   maleRadioButton    RadioButton  findViewById R id maleRadioButton   femaleRadioButton    RadioButton  findViewById R id femaleRadioButton     Then use the result for your if else case consideration   if  maleRadioButton isChecked      femaleRadioButton isChecked           Log d  QAOD    Gender is Selected      else       Toast makeText getApplicationContext     Please select Gender   Toast LENGTH SHORT  show        Log d  QAOD    Gender is Null

User · Answer

rgrp setOnCheckedChangeListener new RadioGroup OnCheckedChangeListener              Override         public void onCheckedChanged RadioGroup radioGroup  int i                switch i                    case R id type car                      num 1                      Toast makeText getApplicationContext     Car  Toast LENGTH LONG  show                        break                  case R id type bike                      num 2                      Toast makeText getApplicationContext     Bike  Toast LENGTH LONG  show                        break

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

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