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android自带的RadioGroup是继承自LinearLayout，如果布局的时候不是直接写radiobutton,即radiobutton外面还包了一层容器，这时分组是不成功的，因为查找不到radiobutton,如果要实现这种效果呢，于是看了RadioGroup的源码，发现问题在于addView方法和自定义的PassThroughHierarchyChangeListener；
下面就这两个地方动手脚，先拷贝源码，然后去掉RadioGroup(Context context, AttributeSet attrs) 中的方法，我新增了一个方法，查找viewGroup控件中的radioButton,
/** 查找radioButton控件 */public RadioButton findRadioButton(ViewGroup group) {RadioButton resBtn = null;int len = group.getChildCount();for (int i = 0; i < len; i++) {if (group.getChildAt(i) instanceof RadioButton) {resBtn = (RadioButton) group.getChildAt(i);} else if (group.getChildAt(i) instanceof ViewGroup) {findRadioButton((ViewGroup) group.getChildAt(i));}}return resBtn;}
addView的实现如下：
1 @Override 2 public void addView(View child, int index, ViewGroup.LayoutParams params) { 3 if (child instanceof RadioButton) { 4 final RadioButton button = (RadioButton) child; 5 if (button.isChecked()) { 6 mProtectFromCheckedChange = true; 7 if (mCheckedId != -1) { 8 setCheckedStateForView(mCheckedId, false); 9 } 10 mProtectFromCheckedChange = false; 11 setCheckedId(button.getId()); 12 } 13 } else if (child instanceof ViewGroup) { //这里是我添加的代码 14 final RadioButton button = findRadioButton((ViewGroup) child); 15 if (button.isChecked()) { 16 mProtectFromCheckedChange = true; 17 if (mCheckedId != -1) { 18 setCheckedStateForView(mCheckedId, false); 19 } 20 mProtectFromCheckedChange = false; 21 setCheckedId(button.getId()); 22 } 23 } 24 25 super.addView(child, index, params); 26 }
然后在自定义的PassThroughHierarchyChangeListener中修改：
private class PassThroughHierarchyChangeListener implementsViewGroup.OnHierarchyChangeListener {private ViewGroup.OnHierarchyChangeListener mOnHierarchyChangeListener;public void onChildViewAdded(View parent, View child) {if (parent == MyRadioGroup.this && child instanceof RadioButton) {int id = child.getId();// generates an id if it's missingif (id == View.NO_ID) {id = child.hashCode();child.setId(id);}((RadioButton) child).setOnCheckedChangeListener(mChildOnCheckedChangeListener);} else if (parent == MyRadioGroup.this //这里是我添加的代码&& child instanceof ViewGroup) {RadioButton btn = findRadioButton((ViewGroup) child);int id = btn.getId();// generates an id if it's missingif (id == View.NO_ID) {id = btn.hashCode();btn.setId(id);}btn.setOnCheckedChangeListener(mChildOnCheckedChangeListener);}if (mOnHierarchyChangeListener != null) {mOnHierarchyChangeListener.onChildViewAdded(parent, child);}}public void onChildViewRemoved(View parent, View child) {if (parent == MyRadioGroup.this && child instanceof RadioButton) {((RadioButton) child).setOnCheckedChangeListener(null);} else if (parent == MyRadioGroup.this&& child instanceof ViewGroup) {findRadioButton((ViewGroup) child).setOnCheckedChangeListener(null);}if (mOnHierarchyChangeListener != null) {mOnHierarchyChangeListener.onChildViewRemoved(parent, child);}}}
做好了上面的步骤，下面布局就可以按照自己的意思来了，并且分组效果也不会影响
下面我的布局文件demo:
<com.huaheng.wy.view.MyRadioGroupandroid:id="@+id/rg"android:layout_width="fill_parent"android:layout_height="65dp"android:layout_alignParentBottom="true"android:background="@drawable/yst_i_bottom"android:orientation="horizontal" ><!-- 首页 --><FrameLayoutandroid:id="@+id/left"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:layout_marginBottom="2dp"android:layout_marginTop="3dp"android:layout_weight="1" ><RadioButtonandroid:id="@+id/rbtn_home"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center"android:background="@null"android:button="@null"android:drawableTop="@drawable/yst_i_bottomhome_selector"android:gravity="center_horizontal"android:text="首页"android:textColor="@color/white"android:textSize="@dimen/font_5" /><Buttonandroid:id="@+id/btn_home_point"android:layout_width="21dp"android:layout_height="20dp"android:layout_gravity="top|right"android:layout_marginRight="10dp"android:layout_marginTop="0dp"android:background="@drawable/notice_bg"android:text="1"android:textColor="@color/white"android:textSize="@dimen/font_6"android:visibility="gone" /></FrameLayout><!-- 历史 --><RadioButtonandroid:id="@+id/rbtn_his"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:layout_marginBottom="2dp"android:layout_marginTop="3dp"android:layout_weight="1"android:background="@null"android:button="@null"android:drawableTop="@drawable/yst_i_bottomhis_selector"android:gravity="center_horizontal"android:text="历史"android:textColor="@color/white"android:textSize="@dimen/font_5" /><!-- 扫描 --><Buttonandroid:id="@+id/rbtn_scan"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:background="@drawable/scan_selector"android:button="@null"android:gravity="center_horizontal|bottom"android:paddingBottom="7dp"android:text="扫描"android:textColor="@color/white"android:textSize="@dimen/font_5" /><RadioButtonandroid:id="@+id/rbtn_seek"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:layout_marginBottom="2dp"android:layout_marginTop="3dp"android:layout_weight="1"android:background="@null"android:button="@null"android:drawableTop="@drawable/yst_i_bottomseek_selector"android:gravity="center_horizontal"android:text="搜索"android:textColor="@color/white"android:textSize="@dimen/font_5" /><RadioButtonandroid:id="@+id/rbtn_more"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_gravity="center_vertical"android:layout_marginBottom="2dp"android:layout_marginTop="3dp"android:layout_weight="1"android:background="@null"android:button="@null"android:drawableTop="@drawable/yst_i_bottommore_selector"android:gravity="center_horizontal"android:text="更多"android:textColor="@color/white"android:textSize="@dimen/font_5" /></com.huaheng.wy.view.MyRadioGroup>
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