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 datab

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();
            }
        });