Radio Button checking and unchecking programmatically in android

Question

My requirement is to be able to be able to check only 1 radio button from the no of options available.

My layout is simple

User should be able to select only one of p1, p2 and p3.

The IDs for for the buttons are rB1,rB2 and rB3.

PS: I know it is possible to achieve the same with RadioGroup , but in this particular instance I want to go with Radio Button hence the query

Answer 1

Try this..

r1.setOnCheckedChangeListener(this);
r2.setOnCheckedChangeListener(this);
r3.setOnCheckedChangeListener(this);

And CheckedChangeListener

@Override
  public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    if (isChecked) {
      if (buttonView.getId() == R.id.rB1) {
        r2.setChecked(false);
        r3.setChecked(false);
      }
      if (buttonView.getId() == R.id.rB2) {
        r1.setChecked(false);
        r3.setChecked(false);
      }
      if (buttonView.getId() == R.id.rB3) {
        r1.setChecked(false);
        r2.setChecked(false);
      }
    }
  }

and don't forget to implements OnCheckedChangeListener in your activity or fragment.

Answer 2

Use Radio group

XML:

 <RadioGroup
        android:id="@+id/radiogroup"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >

        <RadioButton
            android:id="@+id/rB1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="P1" 
            android:checked="true" />

        <RadioButton
            android:id="@+id/rB2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="P2" />
       <RadioButton
            android:id="@+id/rB3"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="P3" />

    </RadioGroup>