android RadioButton

Introduction
Assign RadioListenser to each RadioButton

rbPurple.setOnClickListener(listener);
rbYellow.setOnClickListener(listener);
rbBlack.setOnClickListener(listener);
rbWhite.setOnClickListener(listener);
Introduction
Identify each components or elements

background = (TextView)
findViewById(R.id.background);
RadioButton rbPurple = (RadioButton)
findViewById(R.id.radio_purple);
RadioButton rbYellow = (RadioButton)
findViewById(R.id.radio_yellow);
RadioButton rbBlack = (RadioButton)
findViewById(R.id.radio_black);
RadioButton rbWhite = (RadioButton)
findViewById(R.id.radio_white);
Introduction
 Create RadioListener

listener = new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
RadioButton rb = (RadioButton) v;
switch (rb.getId()) {
case R.id.radio_purple:
background.setBackgroundColor(Color.parseColor("#ff00ff"));
break;
case R.id.radio_yellow:
background.setBackgroundColor(Color.parseColor("#ffff00"));
break;
case R.id.radio_black:
background.setBackgroundColor(Color.parseColor("#000000"));
break;
case R.id.radio_white:
background.setBackgroundColor(Color.parseColor("#ffffff"));
break;
}

}

};
Introduction
Assign Variables

 OnClickListener listener;
 TextView background;
Introduction
Radio Button

<RadioGroup
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:background="#333333"
        android:orientation="horizontal" >

        <RadioButton
            android:id="@+id/radio_purple"
            android:layout_width="fill_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="24dp"
            android:layout_weight="1" />
</RadioGroup>
Introduction
TextView

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

        <TextView
            android:layout_width="fill_parent"
            android:layout_height="20dp"
            android:layout_weight="1"
            android:background="#ff00ff"/>
</LinearLayout>
Introduction
 TextView

<TextView
        android:id="@+id/background"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:layout_weight="1"
        android:background="#ffffff" >
</TextView>
Introduction
 Background changing radio button
TextView
TextView
RadioButton
Introduction
<RadioGroup
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        >
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/yes"
            android:checked="true"
            android:text="YES"/>
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:id="@+id/no"
            android:text="NO"/>
       
</RadioGroup>
Introduction
 In graphical user interfaces, groups of buttons, of which
only one can be on at a time. When you select one
button, all the others are automatically deselected.

 YES/NO