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

AndroidRadio ButtonRadio Group

Android Problem Overview

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");
}

Android Solutions

Solution 1 - Android

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
}

Solution 2 - Android

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

Solution 3 - Android

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");
}

Solution 4 - Android

  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;
            }
        }
    });

Solution 5 - Android

Try to use the method isChecked();

Like,

> selectedRadioButton.isChecked() -> returns boolean.

Refere here for more details on Radio Button

Solution 6 - Android

try to use this

<RadioGroup
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"	   
	android:orientation="horizontal"
>    
	<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"   
	/>

	<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"
	/>    
</RadioGroup>

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;
        }
    }

Solution 7 - Android

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:

  1. 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;
     }
 }

  2. In activity_main.xml:

     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="horizontal">

     <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="@string/gender"/>

     <RadioGroup
             android:id="@+id/gender_radiogroup"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:orientation="horizontal">

         <RadioButton
                 android:id="@+id/male"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@string/male"/>

         <RadioButton
                 android:id="@+id/female"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:text="@string/female""/>

     </RadioGroup>

     <android.support.v7.widget.AppCompatButton
         android:id="@+id/btnSubmit"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:text="@string/submit"/>

 </LinearLayout>

If no gender radio button is selected, then the code to proceed will not run.

I hope this helps.

Solution 8 - Android

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;}
        //. . . .
    }

Solution 9 - Android

My answer is according to the documentation, which works fine.

  1. In xml file include android:onClick="onRadioButtonClicked" as shown below:

  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;
 }

    }

Solution 10 - Android

mRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup radioGroup, int i) {
            if (mRadioButtonMale.isChecked()) {
                text = "male";
            } else {
                text = "female";
            }
        }
    });

OR

 mRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(RadioGroup radioGroup, int i) {
            if (mRadioButtonMale.isChecked()) { text = "male"; }
            if(mRadioButtonFemale.isChecked()) { text = "female"; }
        }
    });

Solution 11 - Android

radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup radioGroup, int checkedId) {
                checkedId = radioGroup.getCheckedRadioButtonId();

                switch (checkedId) {
                    case R.id.expert_rb:
                        // do something
                        break;
                    case R.id.no_expert_rb:
                        // do something else
                        break;
                   
                }
            }
        });
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