Only one radio button selected at a time

I have two radio button in a radio group. I also have 2 androd:button checkbox- for when the radio button is deselected and checkbox_v for when he user selects the checkbox. I also implemnted that a method `onRadioButtonClick` in order to make sure that only one radio button had drawable:checkbox and the other has checkbox_v . How can I implemnt onRadioClick to do this? any idea? ``` public void onRadioButtonClick(View v) { RadioButton button = (RadioButton) v; boolean checkBox1Selected; boolean checkBox2Selected = false; Toast.makeText(MainActivity.this, button.getId()+ " was chosen."+R.id.wificheckBox, Toast.LENGTH_SHORT).show(); if ( button.getId() ==R.id.wificheckBox) { // Toggle status of checkbox selection checkBox1Selected = radiowifiButton.isChecked(); // Ensure that other checkboxes are not selected if (checkBox2Selected) { radiomobileButton.setChecked(false); checkBox2Selected = false; } else if (button.getId() ==R.id.wifimobilecheckBox) { // Toggle status of checkbox selection checkBox2Selected = radiomobileButton.isChecked(); // Ensure that other checkboxes are not selected if (checkBox1Selected) { radiowifiButton.setChecked(false); checkBox1Selected = false; } } } ``` main xml ``` <RadioGroup android:id="@+id/radioGroup" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/ll_1" android:layout_marginLeft="20dp"> <LinearLayout android:id="@+id/ll_2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/ll_1" android:layout_marginLeft="20dp" android:orientation="horizontal" > <RadioButton android:id="@+id/wifimobilecheckBox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:button="@drawable/button_radio" android:checked="true" android:onClick="onRadioButtonClick" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/wificheckBox" android:layout_toRightOf="@+id/wificheckBox" android:paddingLeft="15dp" android:text="WiFi or mobile network" android:textColor="#333333" android:textSize="20dp" /> </LinearLayout> <LinearLayout android:id="@+id/ll_3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentLeft="true" android:layout_below="@+id/ll_2" android:paddingTop="20dp" android:layout_marginLeft="20dp" android:orientation="horizontal" > <RadioButton android:id="@+id/wificheckBox" android:layout_width="wrap_content" android:layout_height="wrap_content" android:button="@drawable/button_radio" android:onClick="onRadioButtonClick" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/wificheckBox" android:layout_toRightOf="@+id/wificheckBox" android:paddingLeft="15dp" android:text="WiFi " android:textColor="#333333" android:textSize="20dp" /> </LinearLayout> </RadioGroup> ``` Drawabe- button_radio ``` <item android:state_checked="true"android:state_pressed="false" android:drawable="@drawable/checkbox_v"/><item android:state_checked="false"android:state_pressed="false"'android:drawable="@drawable/checkbox"/> ```