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 >