RadioGroup
RadioButton的集合，提供多选一的机制
属性：
android:orientation="horizontal/vertical"
vertical 垂直排布
horizontal 水平排布 决定当前RadioGroup中RadioButton以什么形式排列
private RadioGroup rg ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
rg=(RadioGroup) findViewById(R.id. radioGroup1);
//实现RadioGroup的监听事件
rg.setOnCheckedChangeListener( new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
// TODO Auto-generated method stub
switch (checkedId) {
case R.id.radio :
System. out.println();
break;
case R.id.radio0 :
System. out.println();
break;
case R.id.radio1 :
System. out.println();
break;
default:
break;
}
}
});
}
<RadioGroup
android:id="@+id/radioGroup1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>
<RadioButton
android:id="@+id/radio0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="0" />
<RadioButton
android:id="@+id/radio1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="1" />
</RadioGroup >