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
复制代码 代码如下:
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：
复制代码 代码如下:
@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
if (child instanceof RadioButton) {
final RadioButton button = (RadioButton) child;
if (button.isChecked()) {
mProtectFromCheckedChange = true;
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
mProtectFromCheckedChange = false;
setCheckedId(button.getId());
}
} else if (child instanceof ViewGroup) { //这里是我添加的代码
final RadioButton button = findRadioButton((ViewGroup) child);
if (button.isChecked()) {
mProtectFromCheckedChange = true;
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
mProtectFromCheckedChange = false;
setCheckedId(button.getId());
}
}
super.addView(child, index, params);
}
然后在自定义的PassThroughHierarchyChangeListener中修改：
复制代码 代码如下:
private class PassThroughHierarchyChangeListener implements
ViewGroup.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 missing
if (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 missing
if (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:
复制代码 代码如下:
android:layout_width="fill_parent"
android:layout_height="65dp"
android:layout_alignParentBottom="true"
android:background="@drawable/yst_i_bottom"
android:orientation="horizontal" >
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: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" />
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" />
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" />
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" />
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" />
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" />
所有实现代码都在这里，下面我就把自定义的radioGroup的代码，完整的贴出来
复制代码 代码如下:
package com.huaheng.wy.view;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CompoundButton;
import android.widget.LinearLayout;
import android.widget.RadioButton;
public class MyRadioGroup extends LinearLayout {
// holds the checked id; the selection is empty by default
private int mCheckedId = -1;
// tracks children radio buttons checked state
private CompoundButton.onCheckedChangeListener mChildOnCheckedChangeListener;
// when true, monCheckedChangeListener discards events
private boolean mProtectFromCheckedChange = false;
private onCheckedChangeListener mOnCheckedChangeListener;
private PassThroughHierarchyChangeListener mPassThroughListener;
public MyRadioGroup(Context context) {
super(context);
setOrientation(VERTICAL);
init();
}
public MyRadioGroup(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
mChildonCheckedChangeListener = new CheckedStateTracker();
mPassThroughListener = new PassThroughHierarchyChangeListener();
super.setonHierarchyChangeListener(mPassThroughListener);
}
@Override
public void setonHierarchyChangeListener(onHierarchyChangeListener listener) {
// the user listener is delegated to our pass-through listener
mPassThroughListener.monHierarchyChangeListener = listener;
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
// checks the appropriate radio button as requested in the XML file
if (mCheckedId != -1) {
mProtectFromCheckedChange = true;
setCheckedStateForView(mCheckedId, true);
mProtectFromCheckedChange = false;
setCheckedId(mCheckedId);
}
}
@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
if (child instanceof RadioButton) {
final RadioButton button = (RadioButton) child;
if (button.isChecked()) {
mProtectFromCheckedChange = true;
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
mProtectFromCheckedChange = false;
setCheckedId(button.getId());
}
} else if (child instanceof ViewGroup) {
final RadioButton button = findRadioButton((ViewGroup) child);
if (button.isChecked()) {
mProtectFromCheckedChange = true;
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
mProtectFromCheckedChange = false;
setCheckedId(button.getId());
}
}
super.addView(child, index, params);
}
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;
}
public void check(int id) {
// don't even bother
if (id != -1 && (id == mCheckedId)) {
return;
}
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
if (id != -1) {
setCheckedStateForView(id, true);
}
setCheckedId(id);
}
private void setCheckedId(int id) {
mCheckedId = id;
if (monCheckedChangeListener != null) {
mOnCheckedChangeListener.onCheckedChanged(this, mCheckedId);
}
}
private void setCheckedStateForView(int viewId, boolean checked) {
View checkedView = findViewById(viewId);
if (checkedView != null && checkedView instanceof RadioButton) {
((RadioButton) checkedView).setChecked(checked);
}
}
public int getCheckedRadioButtonId() {
return mCheckedId;
}
public void clearCheck() {
check(-1);
}
public void setonCheckedChangeListener(onCheckedChangeListener listener) {
monCheckedChangeListener = listener;
}
@Override
public LayoutParams generateLayoutParams(AttributeSet attrs) {
return new MyRadioGroup.LayoutParams(getContext(), attrs);
}
@Override
protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
return p instanceof MyRadioGroup.LayoutParams;
}
@Override
protected LinearLayout.LayoutParams generateDefaultLayoutParams() {
return new LayoutParams(LayoutParams.WRAP_CONTENT,
LayoutParams.WRAP_CONTENT);
}
public static class LayoutParams extends LinearLayout.LayoutParams {
public LayoutParams(Context c, AttributeSet attrs) {
super(c, attrs);
}
public LayoutParams(int w, int h) {
super(w, h);
}
public LayoutParams(int w, int h, float initWeight) {
super(w, h, initWeight);
}
public LayoutParams(ViewGroup.LayoutParams p) {
super(p);
}
public LayoutParams(MarginLayoutParams source) {
super(source);
}
@Override
protected void setbaseAttributes(TypedArray a, int widthAttr,
int heightAttr) {
if (a.hasValue(widthAttr)) {
width = a.getLayoutDimension(widthAttr, "layout_width");
} else {
width = WRAP_CONTENT;
}
if (a.hasValue(heightAttr)) {
height = a.getLayoutDimension(heightAttr, "layout_height");
} else {
height = WRAP_CONTENT;
}
}
}
public interface onCheckedChangeListener {
public void onCheckedChanged(MyRadioGroup group, int checkedId);
}
private class CheckedStateTracker implements
CompoundButton.onCheckedChangeListener {
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
// prevents from infinite recursion
if (mProtectFromCheckedChange) {
return;
}
mProtectFromCheckedChange = true;
if (mCheckedId != -1) {
setCheckedStateForView(mCheckedId, false);
}
mProtectFromCheckedChange = false;
int id = buttonView.getId();
setCheckedId(id);
}
}
private class PassThroughHierarchyChangeListener implements
ViewGroup.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 missing
if (id == View.NO_ID) {
id = child.hashCode();
child.setId(id);
}
((RadioButton) child)
.setonCheckedChangeListener(mChildOnCheckedChangeListener);
} else if (parent == MyRadioGroup.this
&& child instanceof ViewGroup) {
RadioButton btn = findRadioButton((ViewGroup) child);
int id = btn.getId();
// generates an id if it's missing
if (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);
}
}
}
}
