RadioGroup的一些操作总结

一、子RadioButton里涉及到android:state_focused 与 android:state_checked时注意两个状态的处理顺序，否则会出现Group里的控件背景状态错乱。以下为个人实验可行selector:

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/index_djzx_pressed" android:state_focused="false" android:state_checked="true"/>
<item android:drawable="@drawable/index_djzx_focusedc" android:state_focused="true" android:state_checked="true"/>
<item android:drawable="@drawable/index_djzx_focused" android:state_focused="true" android:state_checked="false"/>
<item android:drawable="@drawable/index_djzx"/>
</selector>

二、在代码中控制RadioGroup的选择其中的某个子RadioButton:利用check(资源id)方式

mrbtngroup_Navigation = (RadioGroup)findViewById(R.id.rbtngroup_Navigation);

mrbtngroup_Navigation.check(R.id.index_djzx_btn);

三、取消RadioGroup内的所有RadioButton的选中状态：处理方式为利用RadioGroup的check(id)的方法，将RadioGroup的check状态指向一个非RadioGroup内子控件的id:

方法如下：

mrbtngroup_Navigation.check(R.id.index_setting_btn);

另外附上页面Xml的RadioGroup部分布局的布局：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="75px"
android:paddingTop="15px"
android:gravity="center_vertical"
android:layout_gravity="center_vertical"
android:orientation="horizontal">
<RadioGroup
android:id="@+id/rbtngroup_Navigation"
android:layout_width="wrap_content"
android:layout_height="75px"
android:layout_marginLeft="45px"
android:layout_marginRight="75px"
android:orientation="horizontal"
android:gravity="center_vertical"
android:layout_gravity="center_vertical">

<RadioButton
android:id="@+id/index_djzx_btn"
android:layout_width="120px"
android:tag="topmenu1"
android:layout_height="38px"
android:layout_marginLeft="50px"
android:button="@null"
android:background="@drawable/index_djzx_select"
android:nextFocusRight="@+id/index_dwgl_btn"
android:nextFocusLeft="@+id/index_search_btn"
android:onClick="switchColumn"/>

<RadioButton
android:id="@+id/index_dwgl_btn"
android:layout_width="120px"
android:tag="topmenu2"
android:layout_height="38px"
android:layout_marginLeft="50px"
android:button="@null"
android:background="@drawable/index_dwgl_select"
android:nextFocusLeft="@+id/index_djzx_btn"
android:nextFocusRight="@+id/index_dyjy_btn"
android:onClick="switchColumn"/>

<RadioButton
android:id="@+id/index_dyjy_btn"
android:tag="topmenu3"
android:layout_width="120px"
android:layout_height="38px"
android:layout_marginLeft="50px"
android:button="@null"
android:checked="true"
android:background="@drawable/index_dyjy_select"
android:nextFocusLeft="@+id/index_dwgl_btn"
android:nextFocusRight="@+id/index_zwfw_btn"
android:onClick="switchColumn"/>

<RadioButton
android:id="@+id/index_zwfw_btn"
android:layout_width="120px"
android:tag="topmenu4"
android:layout_height="38px"
android:layout_marginLeft="50px"
android:button="@null"
android:background="@drawable/index_zwfw_select"
android:nextFocusLeft="@+id/index_dyjy_btn"
android:nextFocusRight="@+id/index_bmfw_btn"
android:onClick="switchColumn"/>

<RadioButton
android:id="@+id/index_bmfw_btn"
android:layout_width="120px"
android:tag="topmenu5"
android:layout_height="38px"
android:layout_marginLeft="50px"
android:button="@null"
android:background="@drawable/index_bmfw_select"
android:nextFocusLeft="@+id/index_zwfw_btn"
android:nextFocusRight="@+id/index_setting_btn"
android:onClick="switchColumn"/>
</RadioGroup>

<!-- 设置 -->

<Button
android:id="@+id/index_setting_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginRight="184px"
android:visibility="gone"
android:background="@drawable/index_setting_select"
android:nextFocusLeft="@+id/index_bmfw_btn"
android:nextFocusRight="@+id/index_search_btn"
android:onClick="switchColumn"
android:tag="topmenu6" />

<!-- 搜索 -->

<Button
android:id="@+id/index_search_btn"
android:layout_width="35px"
android:layout_height="38px"
android:layout_marginLeft="30px"
android:visibility="gone"
android:background="@drawable/index_search_select"
android:nextFocusLeft="@+id/index_setting_btn"
android:nextFocusRight="@+id/index_djzx_btn"
android:onClick="startColumnActivity"
android:tag="topmenu6" />

</LinearLayout>