本文介绍了一种自定义RadioGroup的实现方法，该方法能够更好地复用布局并简化代码维护。通过对RadioGroup源码的学习，文章详细展示了如何利用层次结构监听实现子项的自动注册与监听设置。
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上面就是需求设计，4个类似的布局控件，每次只能选择一个，然后得到上面对应的钱数。（上面只是效果图，实际数据是从服务器获取，然后付到控件上）
看到这种，我们就回想到，几种实现方法。
1.把这个整体写一个布局，在xml布局中，复制粘贴，代码，凑够4个。非常不建议这样，因为4个的布局样式是一样的，只是数据可能不相同，所以我们应该写一个组合控件然后重复利用。
2.就是写一个
3.还有一种就是使用GridView，我们看多多个相同的布局，就会相到使用listView和GridView。这种方法是可以使用的，不过在有个问题是，如果没有数据的前提下，它将会是一个空布局，不太好看，对于后期修改或去掉这一部分布局的话，相对来说好算比较好修改，去电一个GridView和他相对应的adapter就好了。
下面我们在针对第二种来说一下，解决一下他的不好修改的特点，因为，我们一般写完程序之后就会懒得修改，所以我们在第一次编写的时候，要为以后的修改做好准备，一切为了方便修改。因为程序员都知道，产品的需求是一直在变化，。。。。。你们懂就好，假如，产品想把这个东西换一个样式，或是直接其用掉这一部分布局，那我们就尽量做到，删除几行代码搞定它。那么就需要我们在2方式的基础上再封装一层。
把四个弄成一个控件，然后再整体加进去。
你们仔细看，上面的是不是一个单选按钮组?就和androd的radiobutton控件相似，然后用一个radioGroup包含。
所以我们可以针对这个写一个类似RadioGroup和RadioButton那样类似的东西。
首先先解决RadioButton类似的控件，先写一个布局，
布局为，
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center"
android:orientation="vertical" >
<LinearLayout
android:id="@+id/llbg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_marginTop="16dp"
android:background="@drawable/btn_recharge"
android:orientation="vertical" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginRight="5dp"
android:orientation="horizontal" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="￥"
android:textColor="@color/white" />
<TextView
android:id="@+id/tvMoney"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="0"
android:textColor="@color/white"
android:textSize="18sp" />
</LinearLayout>
<TextView
android:id="@+id/tvcords"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:layout_marginRight="5dp"
android:text="0币"
android:textColor="@color/yellow"
android:textSize="12sp" />
</LinearLayout>
<TextView
android:id="@+id/tvZengs"
android:visibility="visible"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:background="@drawable/icon_recharge_discount"
android:gravity="center_horizontal"
android:text="送0"
android:textColor="@color/white"
android:textSize="10sp" />
</RelativeLayout>
就这么简单写一下。
然后把其整体封装为一个组合控件，编写方法什么的。
public class RechargeValueLayout extends FrameLayout{
private View view;
private TextView mZengs;
private TextView mMoney;
private TextView mCords;
private String money;
private LinearLayout mllbg;
private Boolean isChecked;
public RechargeValueLayout(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public RechargeValueLayout(Context context, AttributeSet attrs) {
super(context, attrs);
view = View.inflate(context, R.layout.recharge_value_item, this);
mllbg = (LinearLayout)view.findViewById(R.id.llbg);
mZengs = (TextView)view.findViewById(R.id.tvZengs);
mMoney = (TextView)view.findViewById(R.id.tvMoney);
mCords = (TextView)view.findViewById(R.id.tvcords);
}
public RechargeValueLayout(Context context) {
super(context);
}
public void setChecked(Boolean isChecked){
Log.i("TAG2", "isSelected===>>>>"+isChecked);
if(isChecked==this.isChecked){
return;
}
if(isChecked){
mllbg.setBackgroundResource(R.drawable.btn_recharge_active);
}else{
mllbg.setBackgroundResource(R.drawable.btn_recharge);
}
this.isChecked = isChecked;
}
public boolean isChecked(){
return this.isChecked;
}
public void setZengsValue(int value){
if(value>0){
mZengs.setVisibility(View.VISIBLE);
mZengs.setText("送"+value+"");
}else{
mZengs.setVisibility(View.GONE);
}
}
public String getMoneyValue(){
return this.money;
}
public void setMoneyValue(int value){
if(value>0){
mMoney.setText(value+"");
this.money = value+"";
}else{
mMoney.setText("0币");
}
}
public void setCordsValue(int value){
if(value>0){
mCords.setText(value+"币");
}else{
mCords.setText("0币");
}
}
}这样，你就直接可以引用其路径，直接使用这个组合控件。其实到这里，就实现了2方式所说的。但是仅用这个，那么我们只是实现了布局重用，但是不好进行替换修改，你可以想想，这么一个控件里有3个textView，并且我们要对其textView进行赋值，也就是说我们要对12TextView经行操作，如果这12TextView放在我们activity里，一是代码过于臃肿，二是你想想，如果以后去掉的话，我们就得对这所有涉及到这12个TextView的代码都得进行删除。
所以我们现在要把这四个控件再给他们一个类似RadioGroup的容器，在RadioGroup里有一个点击事件，只要对RadioCroup设置上监听，那么在RadioGroup的控件就自动设置上了监听，所以，咱activity里面我们只需要这个RadioGroup的控件代码，1个对12个，你们想想到知道后续修改操作那种方便。
开始是想的定义的布局控件，这个布局控件得到自己里面的孩子数，然后再遍历循环给孩子设置上监听，可是失败了。
具体的说说失败的代码。
<com.song.components.RechargeValueGroup
android:id="@+id/rechargeGroup"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<com.song.components.RechargeValueLayout
android:id="@+id/tab1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" >
</com.song.components.RechargeValueLayout>
<com.song.components.RechargeValueLayout
android:id="@+id/tab2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" >
</com.song.components.RechargeValueLayout>
<com.song.components.RechargeValueLayout
android:id="@+id/tab3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" >
</com.song.components.RechargeValueLayout>
<!--
<com.song.components.RechargeValueLayout
android:id="@+id/tab4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" >
</com.song.components.RechargeValueLayout>
-->
</com.song.components.RechargeValueGroup>
这是布局，首先把RechargeValueLayout放到RechargeValueGroup里面，然后RechargeValueGroup里面得到自己的孩子数，
public class RechargeValueGroup extends FrameLayout {
private OnItemTabClickListener listener;
public RechargeValueGroup(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public RechargeValueGroup(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public RechargeValueGroup(Context context) {
super(context);
// TODO Auto-generated constructor stub
}
private void init() {
int count = getChildCount();
for (int i = 0; i < count; i++) {
getChildAt(i).setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
if(listener!=null){
listener.onItemClick(RechargeValueGroup.this,v.getId());
}
}
});
}
}
/**
* 定义Group的监听，点击每一个子按钮就会返回相对应子按钮的信息，以方便操作
*/
public interface OnItemTabClickListener {
public void onItemClick(RechargeValueGroup view, int checkedId);
}
}
可是这样有个问题，在构造函数执行的时候是获得不到孩子数的，这样就没法给孩子设置上监听了。
然后我就想记得以前是在onMeasure里面可以得到孩子数，把init的部分放到onMeasure或onLayout方法里，孩子数是得到了，可是这两个方法是，只要布局有变化，其都会走一遍，也就是说只要你布局有变化，他们就会执行，所以出现了一些问题，所以在这两个方法中设置监听是不太好的。
那怎么样技能自动获得孩子数，又能给对应的孩子设置上监听呢？
于是我就去看了一下RadioGroup的源码。
/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.widget;
import com.android.internal.R;
import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.view.accessibility.AccessibilityEvent;
import android.view.accessibility.AccessibilityNodeInfo;
/**
* <p>This class is used to create a multiple-exclusion scope for a set of radio
* buttons. Checking one radio button that belongs to a radio group unchecks
* any previously checked radio button within the same group.</p>
*
* <p>Intially, all of the radio buttons are unchecked. While it is not possible
* to uncheck a particular radio button, the radio group can be cleared to
* remove the checked state.</p>
*
* <p>The selection is identified by the unique id of the radio button as defined
* in the XML layout file.</p>
*
* <p><strong>XML Attributes</strong></p>
* <p>See {@link android.R.styleable#RadioGroup RadioGroup Attributes},
* {@link android.R.styleable#LinearLayout LinearLayout Attributes},
* {@link android.R.styleable#ViewGroup ViewGroup Attributes},
* {@link android.R.styleable#View View Attributes}</p>
* <p>Also see
* {@link android.widget.LinearLayout.LayoutParams LinearLayout.LayoutParams}
* for layout attributes.</p>
*
* @see RadioButton
*
*/
public class RadioGroup 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;
/**
* {@inheritDoc}
*/
public RadioGroup(Context context) {
super(context);
setOrientation(VERTICAL);
init();
}
/**
* {@inheritDoc}
*/
public RadioGroup(Context context, AttributeSet attrs) {
super(context, attrs);
// retrieve selected radio button as requested by the user in the
// XML layout file
TypedArray attributes = context.obtainStyledAttributes(
attrs, com.android.internal.R.styleable.RadioGroup, com.android.internal.R.attr.radioButtonStyle, 0);
int value = attributes.getResourceId(R.styleable.RadioGroup_checkedButton, View.NO_ID);
if (value != View.NO_ID) {
mCheckedId = value;
}
final int index = attributes.getInt(com.android.internal.R.styleable.RadioGroup_orientation, VERTICAL);
setOrientation(index);
attributes.recycle();
init();
}
private void init() {
mChildOnCheckedChangeListener = new CheckedStateTracker();
mPassThroughListener = new PassThroughHierarchyChangeListener();
super.setOnHierarchyChangeListener(mPassThroughListener);
}
/**
* {@inheritDoc}
*/
@Override
public void setOnHierarchyChangeListener(OnHierarchyChangeListener listener) {
// the user listener is delegated to our pass-through listener
mPassThroughListener.mOnHierarchyChangeListener = listener;
}
/**
* {@inheritDoc}
*/
@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());
}
}
super.addView(child, index, params);
}
/**
* <p>Sets the selection to the radio button whose identifier is passed in
* parameter. Using -1 as the selection identifier clears the selection;
* such an operation is equivalent to invoking {@link #clearCheck()}.</p>
*
* @param id the unique id of the radio button to select in this group
*
* @see #getCheckedRadioButtonId()
* @see #clearCheck()
*/
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);
}
}
/**
* <p>Returns the identifier of the selected radio button in this group.
* Upon empty selection, the returned value is -1.</p>
*
* @return the unique id of the selected radio button in this group
*
* @see #check(int)
* @see #clearCheck()
*
* @attr ref android.R.styleable#RadioGroup_checkedButton
*/
public int getCheckedRadioButtonId() {
return mCheckedId;
}
/**
* <p>Clears the selection. When the selection is cleared, no radio button
* in this group is selected and {@link #getCheckedRadioButtonId()} returns
* null.</p>
*
* @see #check(int)
* @see #getCheckedRadioButtonId()
*/
public void clearCheck() {
check(-1);
}
/**
* <p>Register a callback to be invoked when the checked radio button
* changes in this group.</p>
*
* @param listener the callback to call on checked state change
*/
public void setOnCheckedChangeListener(OnCheckedChangeListener listener) {
mOnCheckedChangeListener = listener;
}
/**
* {@inheritDoc}
*/
@Override
public LayoutParams generateLayoutParams(AttributeSet attrs) {
return new RadioGroup.LayoutParams(getContext(), attrs);
}
/**
* {@inheritDoc}
*/
@Override
protected boolean checkLayoutParams(ViewGroup.LayoutParams p) {
return p instanceof RadioGroup.LayoutParams;
}
@Override
protected LinearLayout.LayoutParams generateDefaultLayoutParams() {
return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
}
@Override
public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
super.onInitializeAccessibilityEvent(event);
event.setClassName(RadioGroup.class.getName());
}
@Override
public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) {
super.onInitializeAccessibilityNodeInfo(info);
info.setClassName(RadioGroup.class.getName());
}
/**
* <p>This set of layout parameters defaults the width and the height of
* the children to {@link #WRAP_CONTENT} when they are not specified in the
* XML file. Otherwise, this class ussed the value read from the XML file.</p>
*
* <p>See
* {@link android.R.styleable#LinearLayout_Layout LinearLayout Attributes}
* for a list of all child view attributes that this class supports.</p>
*
*/
public static class LayoutParams extends LinearLayout.LayoutParams {
/**
* {@inheritDoc}
*/
public LayoutParams(Context c, AttributeSet attrs) {
super(c, attrs);
}
/**
* {@inheritDoc}
*/
public LayoutParams(int w, int h) {
super(w, h);
}
/**
* {@inheritDoc}
*/
public LayoutParams(int w, int h, float initWeight) {
super(w, h, initWeight);
}
/**
* {@inheritDoc}
*/
public LayoutParams(ViewGroup.LayoutParams p) {
super(p);
}
/**
* {@inheritDoc}
*/
public LayoutParams(MarginLayoutParams source) {
super(source);
}
/**
* <p>Fixes the child's width to
* {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT} and the child's
* height to {@link android.view.ViewGroup.LayoutParams#WRAP_CONTENT}
* when not specified in the XML file.</p>
*
* @param a the styled attributes set
* @param widthAttr the width attribute to fetch
* @param heightAttr the height attribute to fetch
*/
@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;
}
}
}
/**
* <p>Interface definition for a callback to be invoked when the checked
* radio button changed in this group.</p>
*/
public interface OnCheckedChangeListener {
/**
* <p>Called when the checked radio button has changed. When the
* selection is cleared, checkedId is -1.</p>
*
* @param group the group in which the checked radio button has changed
* @param checkedId the unique identifier of the newly checked radio button
*/
public void onCheckedChanged(RadioGroup 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);
}
}
/**
* <p>A pass-through listener acts upon the events and dispatches them
* to another listener. This allows the table layout to set its own internal
* hierarchy change listener without preventing the user to setup his.</p>
*/
private class PassThroughHierarchyChangeListener implements
ViewGroup.OnHierarchyChangeListener {
private ViewGroup.OnHierarchyChangeListener mOnHierarchyChangeListener;
/**
* {@inheritDoc}
*/
public void onChildViewAdded(View parent, View child) {
if (parent == RadioGroup.this && child instanceof RadioButton) {
int id = child.getId();
// generates an id if it's missing
if (id == View.NO_ID) {
id = View.generateViewId();
child.setId(id);
}
((RadioButton) child).setOnCheckedChangeWidgetListener(
mChildOnCheckedChangeListener);
}
if (mOnHierarchyChangeListener != null) {
mOnHierarchyChangeListener.onChildViewAdded(parent, child);
}
}
/**
* {@inheritDoc}
*/
public void onChildViewRemoved(View parent, View child) {
if (parent == RadioGroup.this && child instanceof RadioButton) {
((RadioButton) child).setOnCheckedChangeWidgetListener(null);
}
if (mOnHierarchyChangeListener != null) {
mOnHierarchyChangeListener.onChildViewRemoved(parent, child);
}
}
}
}
这就是RadioGroup的源码，加上注释什么的一共400来行代码，所以不是很多，然后就开始看源码。其中一开始在init（）中，有这么一个监听，
mPassThroughListener = new PassThroughHierarchyChangeListener();
super.setOnHierarchyChangeListener(mPassThroughListener);然后找到其对应的监听，
private class PassThroughHierarchyChangeListener implements
ViewGroup.OnHierarchyChangeListener {
private ViewGroup.OnHierarchyChangeListener mOnHierarchyChangeListener;
/**
* {@inheritDoc}
*/
public void onChildViewAdded(View parent, View child) {
if (parent == RadioGroup.this && child instanceof RadioButton) {
int id = child.getId();
// generates an id if it's missing
if (id == View.NO_ID) {
id = View.generateViewId();
child.setId(id);
}
((RadioButton) child).setOnCheckedChangeWidgetListener(
mChildOnCheckedChangeListener);
}
if (mOnHierarchyChangeListener != null) {
mOnHierarchyChangeListener.onChildViewAdded(parent, child);
}
}
/**
* {@inheritDoc}
*/
public void onChildViewRemoved(View parent, View child) {
if (parent == RadioGroup.this && child instanceof RadioButton) {
((RadioButton) child).setOnCheckedChangeWidgetListener(null);
}
if (mOnHierarchyChangeListener != null) {
mOnHierarchyChangeListener.onChildViewRemoved(parent, child);
}
}
}
这个监听继承了ViewGroup.OnHierarchyChangeListener接口，你通过查资料你就会发现，这个监听接口是对其 层次结构的监听，不像
onMeasure或onLayout，他只有在层次结构发生变化时，也就是说在添加view和移除view的时候才会调用，所以他有两个回调方法。onChildViewAdded和onChildViewRemoved。在初始化的时候，子布局是一个一个的被添加到RadioGroup，所以调用onChildViewAdded，可以得带其对应的孩子，就可以对其设置监听了。
这样设置就不会出现重复执行等问题。
然后这一步解决了就好说了。下一把就是我们触发监听后，要这几个控件协调控制，因为只有一个是能被选中。所以在监听的时候我们应该去改变子控件的状态等。
这一步就不细说了，应该都会顺着理清楚，就是只保持一个被选中就可以。附上代码，就是根据需求稍微改动了一下RadioGroup
public class RechargeValueGroup extends LinearLayout {
private ArrayList<Integer> tabChildsId = new ArrayList<Integer>();
private OnItemTabClickListener listener;
private PassThroughHierarchyChangeListener mPassThroughListener;
private CheckedStateTracker mChildOnCheckedChangeListener;
/**
* 记录当前id，默认id为-1
*/
private int mCheckedId = -1;
public RechargeValueGroup(Context context, AttributeSet attrs,
int defStyle) {
super(context, attrs, defStyle);
}
public RechargeValueGroup(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public RechargeValueGroup(Context context) {
super(context);
}
private void init() {
// radiobutton的监听
mChildOnCheckedChangeListener = new CheckedStateTracker();
// 层次结构的监听
mPassThroughListener = new PassThroughHierarchyChangeListener();
// 设置监听
super.setOnHierarchyChangeListener(mPassThroughListener);
}
/**
* 设置tab数据
*
* @param datas
*/
public void setDataOfTabs(List<RechargeNumInfo> datas) {
Log.i("TAG2","getChildCount()===>>>"+getChildCount());
Log.i("TAG2","datas()===>>>"+datas.size());
int count = 0;
if (datas.size() >= getChildCount()) {
count = getChildCount();
// return;
}else{
count = datas.size();
}
for (int i = 0; i < count; i++) {
Log.i("TAG2","data=1111==>>>");
RechargeValueLayout view = (RechargeValueLayout) findViewById(tabChildsId.get(i));
RechargeNumInfo data = datas.get(i);
Log.i("TAG2","data===>>>"+data);
view.setMoneyValue(data.chargeNum);
view.setCordsValue(data.gzyNum);
view.setZengsValue(data.giftNum);
}
}
/**
* {@inheritDoc}
*/
@Override
protected void onFinishInflate() {
super.onFinishInflate();
Log.i("TAG2", "onFinishInflate=111==>>>>");
check(mCheckedId);
}
/**
* 改变item的选择状态
*
* @param viewId
* @param checked
* true 为选择，false 为不选择
*/
private void setCheckedStateForView(int viewId, boolean checked) {
Log.i("TAG2", "setCheckedStateForView====>>>");
View checkedView = findViewById(viewId);
Log.i("TAG2", "setCheckedStateForView===checkedView=>>>" + checkedView);
if (checkedView != null && checkedView instanceof RechargeValueLayout) {
((RechargeValueLayout) checkedView).setChecked(checked);
Log.i("TAG2", "setCheckedStateForView===checkedView=111>>>"
+ checkedView);
}
}
public void check(int id) {
// don't even bother
Log.i("TAG2", "check=000======>>>" + id);
Log.i("TAG2", "check=000=11=====>>>" + mCheckedId);
if (id != -1 && (id == mCheckedId)) {
Log.i("TAG2", "check=111======>>>" + id);
return;
}
if (mCheckedId != -1) {
Log.i("TAG2", "check=222======>>>" + id);
setCheckedStateForView(mCheckedId, false);
}
if (id != -1) {
Log.i("TAG2", "check=333======>>>" + id);
setCheckedStateForView(id, true);
}
setCheckedId(id);
}
/**
* 选择Item后要执行的操作
*
* @param id
*/
private void setCheckedId(int id) {
// 更新当前选择的Item的id
mCheckedId = id;
if (listener != null) {
RechargeValueLayout view = (RechargeValueLayout)findViewById(id);
listener.onItemClick(this, id,view.getMoneyValue());
}
}
/**
* 设置点击item的监听
*
* @param l
*/
public void setOnItemTabClickListener(OnItemTabClickListener l) {
this.listener = l;
}
/**
* item选择监听 Title: RechargeValueGroup.java Description:
*
* @author Liusong
* @date 2015-6-26
* @version V1.0
*/
public interface OnItemTabClickListener {
public void onItemClick(RechargeValueGroupview, int checkedId,String money);
}
/**
* 图层变换监听 Title: RechargeValueGroup.java Description:
*
* @author Liusong
* @date 2015-6-26
* @version V1.0
*/
private class PassThroughHierarchyChangeListener implements
ViewGroup.OnHierarchyChangeListener {
private ViewGroup.OnHierarchyChangeListener mOnHierarchyChangeListener;
/**
* {@inheritDoc}
*/
public void onChildViewAdded(View parent, View child) {
if (parent == RechargeValueTabHost.this
&& child instanceof RechargeValueLayout) {
int id = child.getId();
// Log.i("TAG2", "onChildViewAdded=111==>>>>" + id);
// generates an id if it's missing
if (id == View.NO_ID) {
id = View.generateViewId();
child.setId(id);
}
tabChildsId.add(id);
((RechargeValueLayout) child)
.setOnClickListener(mChildOnCheckedChangeListener);
}
if (mOnHierarchyChangeListener != null) {
mOnHierarchyChangeListener.onChildViewAdded(parent, child);
}
}
/**
* {@inheritDoc}
*/
public void onChildViewRemoved(View parent, View child) {
if (parent == RechargeValueTabHost.this
&& child instanceof RechargeValueLayout) {
((RechargeValueLayout) child).setOnClickListener(null);
tabChildsId.remove(child.getId());
}
// Log.i("TAG2", "onChildViewRemoved=111==>>>>" + child.getId());
if (mOnHierarchyChangeListener != null) {
mOnHierarchyChangeListener.onChildViewRemoved(parent, child);
}
}
}
/**
* 每一项Item的点击事件 Title: RechargeValueGroup.java Description:
*
* @author Liusong
* @date 2015-6-26
* @version V1.0
*/
class CheckedStateTracker implements OnClickListener {
@Override
public void onClick(View v) {
// setCheckedId(v.getId());
check(v.getId());
}
};
// /**
// * Item的具体数据值 Title: <strong>RechargeValueGroup</strong>.java Description:
// *
// * @author Liusong
// * @date 2015-6-26
// * @version V1.0
// */
// class RechargeValueBean {
// public int zengs;
// public int money;
// public int cords;
// }
}
就上上面的代码，由于我是使用的在Xml里面添加子控件，所以就没写addView方法，有兴趣的可以自己写一下addview方法。
然后，我有加了一个public void setDataOfTabs(List<RechargeNumInfo> datas)这个方法，就是把得到的数据直接付给这个控件，这样，就会自动把所有子控件附上值。
这样比较方便，因为数据是从服务器拿到的，使用Gson工具类，直接把数据封装成了集合，只要把集合传入就可实现自动赋值。非常方便，自己不需要一个一个的去赋值了。
根据RadioCroup修改的，只要根据不同的情况稍作修改就可以满足很多情况，例如，我们常见的底部导航，tab选择等等，只要我们稍把不同的item子控件改动一下，我们就会很快的实现一个单选样式的按钮组。
使用方法也很简单，在代码中
mRechargeGroup= (RechargeValueGroup) findViewById(R.id.rechargeGroup);
mRechargeGroup.setOnItemTabClickListener(new OnItemTabClickListener() {
@Override
public void onItemClick(RechargeValueGroupview, int checkedId,String money) {
// TODO Auto-generated method stub
Log.i("TAG2", "checkedId===>>>"+checkedId);
realPrice = money;
}
});
找到控件设置监听，然后回掉回来各种参数，id等，我们也可以根据自己的需求去修改OnItemTabClickListener监听接口中的onItemClick传递的参数来满足自己的需求，
然后我们在适当的地方调用setDataOfTabs(List<RechargeNumInfo> datas)这个方法来设置数据就好了。
xml里面，就是上面的那段代码
<com.song.components.RechargeValueGroup
android:id="@+id/rechargeGroup"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
<com.song.components.RechargeValueLayout
android:id="@+id/tab1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" >
</com.song.components.RechargeValueLayout>
<com.song.components.RechargeValueLayout
android:id="@+id/tab2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" >
</com.song.components.RechargeValueLayout>
<com.song.components.RechargeValueLayout
android:id="@+id/tab3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" >
</com.song.components.RechargeValueLayout>
<!--
<com.song.components.RechargeValueLayout
android:id="@+id/tab4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="1" >
</com.song.components.RechargeValueLayout>
-->
</com.song.components.RechargeValueGroup>
就这么简单，大家可以在这个基础上来进行其他扩展什么的。
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