Apps Android/Eclipse, connecting radio button selections to Checkbox selections

[notageekgirl]

I am coding an android application and i have 2 radio buttons (in a radiogroup) that i want to control the behavior selection for checkboxes...so when i select radio button 1 (which equals 9 choices) should allow the user to only check 9 Checkboxes (even if there are twenty checkboxes. This is my code so far, am stuck

public class Main extends Activity{ Button button; /** Called when the activity is first created. */  @Override public void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.main);     addListenerOnButton();      final RadioButton radio0 = (RadioButton) findViewById(R.id.radio0);     final RadioButton radio1 = (RadioButton) findViewById(R.id.radio1);     radio0.setOnClickListener(radio_listener);     radio1.setOnClickListener(radio_listener);  }  public OnClickListener radio_listener = new OnClickListener() {     public void onClick(View v) {         // Perform action on clicks         RadioButton rb = (RadioButton) v;         // allow user only to select 9 or 18 check box choices          }     });  }   }