Android RadioButton单选框的使用方法

public class mainactivity extends activity {

 public radiogroup mradiogroup1;
 public radiobutton mradio1, mradio2;

 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);

  mradiogroup1 = (radiogroup) findviewbyid(r.id.gendergroup);
  mradio1 = (radiobutton) findviewbyid(r.id.girl);
  mradio2 = (radiobutton) findviewbyid(r.id.boy);
  mradiogroup1.setoncheckedchangelistener(radiogpchange);

 }

 private radiogroup.oncheckedchangelistener radiogpchange = new radiogroup.oncheckedchangelistener() {
  @override
  public void oncheckedchanged(radiogroup group, int checkedid) {
   if (checkedid == mradio1.getid()) {
    toast.maketext(getapplicationcontext(), "女孩", 1).show();
   } else if (checkedid == mradio2.getid()) {
    toast.maketext(getapplicationcontext(), "男孩", 1).show();
   }
  }
 };
}

radiobutton:就像是c#中的radio控件，可以为控件设置group，每个group中的项只能选择一项；

    <radiogroup

        android:id="@+id/gendergroup"

        android:layout_width="fill_parent"

        android:layout_height="wrap_content"

        android:orientation="vertical" >

        <radiobutton

            android:id="@+id/girl"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:text="@string/girl" />

        <radiobutton

            android:id="@+id/boy"

            android:layout_width="fill_parent"

            android:layout_height="wrap_content"

            android:text="@string/boy" />

    </radiogroup>