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");
}

if(radioGroup.getCheckedRadioButtonId()==radioGroup.getChildAt(radio1).getId()) { radio 1 is checked; } else if(..... == radioGroup.getChildAt(radio2)) { radio 2 is checked; } ... using this, you can get selected radio value. :) — Ripal Tamboli, Jul 28 '14 at 10:11
Hi @RipalTamboli Thanks for commenting but i can able to get value and text of radio button. I need to validate if user doesn't check the Gender(Radio Group), will show error message on button click. — Srihari, Jul 28 '14 at 10:14
ok. can you please check that if not selected any option then what getCheckedRadioButtonID() returns? if it returns null / -1 then your work is done by checking either it is null / -1 or not. :) nwys in gender group, always one option by default need to be selected. This is the standard way to design it :) .. let me know if any query. — Ripal Tamboli, Jul 28 '14 at 10:24

score 250 · Accepted Answer · edited Nov 07 '16 at 07:23

250

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
}

edited Nov 07 '16 at 07:23

Shihab Uddin

6,699
2
59
74

answered Jul 28 '14 at 10:15

Apoorv

13,470
4
27
33

Very helpful. Thanks for answer. – Pooja Jun 09 '20 at 16:22

score 28 · Answer 2 · edited Sep 19 '17 at 07:51

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

Robin Ellerkmann · Answer 3 · 2014-07-28T10:17:56.277

8

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");
}

edited Jul 28 '14 at 10:17

answered Jul 28 '14 at 10:12

Robin Ellerkmann

2,083
4
29
34

Hi, Thank you for answering, I need check for whole Radio Group not single Radio Button. – Srihari Jul 28 '14 at 10:20

score 6 · Answer 4 · answered Aug 02 '19 at 10:09

  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;
            }
        }
    });

profjack · Answer 5 · 2018-10-01T14:38:24.873

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:

<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.

Could you add some comments on what this does and why it solves the problem? — Matt C, Sep 29 '18 at 17:07
I have added comments to the post above. I hope the comments show what the code does and why it solves the problem. — profjack, Oct 01 '18 at 14:28

score 4 · Answer 6 · answered Jul 28 '14 at 10:13

4

Try to use the method isChecked();

Like,

selectedRadioButton.isChecked() -> returns boolean.

Refere here for more details on Radio Button

answered Jul 28 '14 at 10:13

balachandarkm

855
2
9
11

Thank you for answering i need check for whole Radio Group not single Radio Button. – Srihari Jul 28 '14 at 10:15
1

[here](http://developer.android.com/reference/android/widget/RadioGroup.html#getCheckedRadioButtonId()) you go. Use getCheckedRadioButtonId() method on your RadioGroup to find out. It returns -1 when no RadioButton in the group is selected. You are already doing this. So If selectedId is -1 then it means no gender is selected. Otherwise something is selected in the group. – balachandarkm Jul 28 '14 at 10:19

score 4 · Answer 7 · edited Feb 24 '17 at 21:55

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;}
        //. . . .
    }

score 4 · Answer 8 · edited Sep 27 '16 at 13:06

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;
        }
    }

score 1 · Answer 9 · edited Jul 13 '18 at 10:51

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

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

<RadioGroup
android:id="@+id/rg1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center">
<RadioButton
    android:id="@+id/b1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="onCreateOptionsMenu()"
    android:onClick="onRadioButtonClicked"
            />
<RadioButton
    android:id="@+id/b2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:text="onCreateMenu()"
    android:onClick="onRadioButtonClicked"
            />
</RadioGroup>

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;
    }
}

score 1 · Answer 10 · answered Oct 11 '20 at 20:54

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"; }
        }
    });

MGLabs · Answer 11 · 2021-06-01T08:36:56.450

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;
                   
                }
            }
        });

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

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