Android ApiDemos示例解析(186):Views->Radio Group
RadioGroup 用来管理一组Radio Button，RadioButton 为单选钮，同一组中的RadioButton只能有一个选中。前面的例子有Android ApiDemos示例解析(107):Views->Controls->1. Light Theme。
使用RadioGroup非常简单，在XML中，将RadioGroup作为RadioButton的Container即可：
<RadioGroup
android:layout_width=”match_parent”
android:layout_height=”wrap_content”
android:orientation=”vertical”
android:checkedButton=”@+id/lunch”
android:id=”@+id/menu”>
<RadioButton
android:text=”@string/radio_group_1_breakfast”
android:id=”@+id/breakfast”
/>
<RadioButton
android:text=”@string/radio_group_1_lunch”
android:id=”@id/lunch” />
<RadioButton
android:text=”@string/radio_group_1_dinner”
android:id=”@+id/dinner” />
<RadioButton
android:text=”@string/radio_group_1_all”
android:id=”@+id/all” />
<TextView
android:text=”@string/radio_group_1_selection”
android:id=”@+id/choice” />
</RadioGroup>
在代码中也可以动态将一个View （如RadioButton）动态添加到一个RadioGroup中：
[java]
// test adding a radio button programmatically
RadioButton newRadioButton = new RadioButton(this);
newRadioButton.setText(R.string.radio_group_snack);
newRadioButton.setId(R.id.snack);
LinearLayout.LayoutParams layoutParams
= new RadioGroup.LayoutParams(
RadioGroup.LayoutParams.WRAP_CONTENT,
RadioGroup.LayoutParams.WRAP_CONTENT);
mRadioGroup.addView(newRadioButton, 0, layoutParams);
// test adding a radio button programmatically
RadioButton newRadioButton = new RadioButton(this);
newRadioButton.setText(R.string.radio_group_snack);
newRadioButton.setId(R.id.snack);
LinearLayout.LayoutParams layoutParams
= new RadioGroup.LayoutParams(
RadioGroup.LayoutParams.WRAP_CONTENT,
RadioGroup.LayoutParams.WRAP_CONTENT);
mRadioGroup.addView(newRadioButton, 0, layoutParams);
补充：移动开发 , Android ,
