How to get the id of selected radio button in android?

Question

I am working on quiz application in android. We have created Select.java page which displays the questions and options(with radio buttons) from sqlite database. Also we created a header.java file for displaying buttons i.e back and next buttons for the Select.java page.

Here we need to get the selected radio button id and need to send that to Header class. Because header class consists of the next button onclick action. Once the next button is clicked the selected radio button value has to be stored in arraylist. We created radio buttons in Select.java class. So my question is how to get the selected radio button id into that next button click action. Please help me regarding this.

Thanks in Advance.

Answer 1

Your layout xml file should be like this

<LinearLayout
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent">

    <RadioGroup 
    android:orientation="vertical"
    android:id="@+id/radiogroup"
     android:layout_width="wrap_content"
  android:layout_height="wrap_content"
    >
    <RadioButton 
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:id="@+id/option1"
       android:text="Option1"
    />
    <RadioButton 
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:id="@+id/option2"
       android:text="Option2"
    />
    <RadioButton 
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:id="@+id/option3"
       android:text="Option3"
    />
    <RadioButton 
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:id="@+id/option4"
       android:text="Option4"
    />
    <RadioButton 
       android:layout_width="wrap_content"
       android:layout_height="wrap_content"
       android:id="@+id/option5"
       android:text="Option5"
    />
    </RadioGroup>
</LinearLayout>

Add the below ode in your Activity

RadioGroup radioGroup = (RadioGroup) findViewById(R.id.radiogroup);
        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) 
            {
                RadioButton checkedRadioButton = (RadioButton) findViewById(checkedId);
                String text = checkedRadioButton.getText().toString();
                Toast.makeText(getApplicationContext(), text, Toast.LENGTH_SHORT).show();
            }
        });

Answer 2

I know it's a old question but i don't see my answer in anywhere and i found it more simple than others..

so here we go:

int myRadioChecked;
if(radioGroup.getCheckedRadioButtonId() == findViewById(R.id.YOUR_RADIO_BUTTON).getId()) {
  /**Do Stuff*/
  //ex.: myRadioChecked = 1;
}