首页 > 代码库 > Android 利用ExpandableListView显示和查询仿QQ分组列表用户信息
Android 利用ExpandableListView显示和查询仿QQ分组列表用户信息
在我们的项目开发过程中，经常会对用户的信息进行分组，即通过组来显示用户的信息，同时通过一定的查询条件来显示查询后的相关用户信息，并且通过颜色选择器来设置列表信息的背景颜色。
其中借鉴xiaanming:http://blog.csdn.net/xiaanming/article/details/12684155
下面来看看项目运行后的效果图以及代码结构图：
下面通过代码来实现整个效果。
1.主界面布局activity_main.xml
<span style="font-size:18px;"><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin" >
<Button
android:id="@+id/my_btn"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="生成部门列表" />
<com.example.myexpandabledemo.ClearEditText
android:id="@+id/filter_edit"
android:layout_width="fill_parent"
android:layout_height="60dp"
android:layout_marginTop="10dip"
android:background="@drawable/search_bar_edit_selector"
android:drawableLeft="@drawable/search_bar_icon_normal"
android:hint="搜索"
android:singleLine="true"
android:textSize="15.0dip" />
<TextView
android:id="@+id/no_search_result_tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="未搜索到结果"
android:visibility="gone"
/>
<ExpandableListView
android:id="@+id/my_expand_lv"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout></span>分析：主界面主要有一个Button,一个自定义搜索的ClearEditText，一个无查询结果的TextView,一个列表信息显示ExpandableListView。其中Button主要用来生成列表信息。2.自定义的ClearEditText的搜索框CliearEditText.java
<span style="font-size:18px;">package com.example.myexpandabledemo;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnFocusChangeListener;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.EditText;
public class ClearEditText extends EditText implements
OnFocusChangeListener, TextWatcher {
/**
* 删除按钮的引用
*/
private Drawable mClearDrawable;
public ClearEditText(Context context) {
this(context, null);
}
public ClearEditText(Context context, AttributeSet attrs) {
//这里构造方法也很重要，不加这个很多属性不能再XML里面定义
this(context, attrs, android.R.attr.editTextStyle);
}
public ClearEditText(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
//获取EditText的DrawableRight,假如没有设置我们就使用默认的图片
mClearDrawable = getCompoundDrawables()[2];
if (mClearDrawable == null) {
mClearDrawable = getResources()
.getDrawable(R.drawable.emotionstore_progresscancelbtn);
}
mClearDrawable.setBounds(0, 0, mClearDrawable.getIntrinsicWidth(), mClearDrawable.getIntrinsicHeight());
setClearIconVisible(false);
setOnFocusChangeListener(this);
addTextChangedListener(this);
}
/**
* 因为我们不能直接给EditText设置点击事件，所以我们用记住我们按下的位置来模拟点击事件
* 当我们按下的位置 在 EditText的宽度 - 图标到控件右边的间距 - 图标的宽度 和
* EditText的宽度 - 图标到控件右边的间距之间我们就算点击了图标，竖直方向没有考虑
*/
@Override
public boolean onTouchEvent(MotionEvent event) {
if (getCompoundDrawables()[2] != null) {
if (event.getAction() == MotionEvent.ACTION_UP) {
boolean touchable = event.getX() > (getWidth()
- getPaddingRight() - mClearDrawable.getIntrinsicWidth())
&& (event.getX() < ((getWidth() - getPaddingRight())));
if (touchable) {
this.setText("");
}
}
}
return super.onTouchEvent(event);
}
/**
* 当ClearEditText焦点发生变化的时候，判断里面字符串长度设置清除图标的显示与隐藏
*/
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (hasFocus) {
setClearIconVisible(getText().length() > 0);
} else {
setClearIconVisible(false);
}
}
/**
* 设置清除图标的显示与隐藏，调用setCompoundDrawables为EditText绘制上去
* @param visible
*/
protected void setClearIconVisible(boolean visible) {
Drawable right = visible ? mClearDrawable : null;
setCompoundDrawables(getCompoundDrawables()[0],
getCompoundDrawables()[1], right, getCompoundDrawables()[3]);
}
/**
* 当输入框里面内容发生变化的时候回调的方法
*/
@Override
public void onTextChanged(CharSequence s, int start, int count,
int after) {
setClearIconVisible(s.length() > 0);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
/**
* 设置晃动动画
*/
public void setShakeAnimation(){
this.setAnimation(shakeAnimation(5));
}
/**
* 晃动动画
* @param counts 1秒钟晃动多少下
* @return
*/
public static Animation shakeAnimation(int counts){
Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
translateAnimation.setInterpolator(new CycleInterpolator(counts));
translateAnimation.setDuration(1000);
return translateAnimation;
}
}</span>搜索框颜色选择器：
<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:drawable="@drawable/search_bar_edit_pressed"></item>
<item android:state_pressed="true" android:drawable="@drawable/search_bar_edit_pressed"></item>
<item android:drawable="@drawable/search_bar_edit_normal"></item>
</selector></span>3.汉字拼音排序所需要的汉字转拼音：CharacterParser.java
<span style="font-size:18px;">package com.example.myexpandabledemo;
/**
* Java汉字转换为拼音
*
*/
public class CharacterParser {
private static int[] pyvalue = http://www.mamicode.com/new int[] {-20319, -20317, -20304, -20295, -20292, -20283, -20265, -20257, -20242, -20230, -20051, -20036, -20032,>4. 拼音比较类：PinyinComparator.java<span style="font-size:18px;">package com.example.myexpandabledemo;
import java.util.Comparator;
public class PinyinComparator implements Comparator<GroupMemberBean> {
public int compare(GroupMemberBean o1, GroupMemberBean o2) {
if (o1.getSortLetters().equals("@")
|| o2.getSortLetters().equals("#")) {
return -1;
} else if (o1.getSortLetters().equals("#")
|| o2.getSortLetters().equals("@")) {
return 1;
} else {
return o1.getSortLetters().compareTo(o2.getSortLetters());
}
}
}
</span>5. 显示列表信息的名字以及其拼音首字母 GrouMemberBean.java
<span style="font-size:18px;">package com.example.myexpandabledemo;
public class GroupMemberBean {
private String name; //显示的数据
private String sortLetters; //显示数据拼音的首字母
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSortLetters() {
return sortLetters;
}
public void setSortLetters(String sortLetters) {
this.sortLetters = sortLetters;
}
}
</span>6.ExpandaleListView 适配器MyExpandableAdapter.java
<span style="font-size:18px;">package com.example.myexpandabledemo;
import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
public class MyExpandableAdapter extends BaseExpandableListAdapter {
private Context mContext;
private List<GroupMemberBean> mGroup;
private List<List<GroupMemberBean>> mChild;
private LayoutInflater mInflater;
public MyExpandableAdapter(Context mContext,List<GroupMemberBean> mGroup,List<List<GroupMemberBean>> mChild){
this.mContext = mContext;
this.mGroup = mGroup;
this.mChild = mChild;
this.mInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
/**
* 当ListView数据发生变化时,调用此方法来更新ListView
*
* @param list
*/
public void updateListView(List<GroupMemberBean> mGroup,List<List<GroupMemberBean>> mChild) {
this.mGroup = mGroup;
this.mChild = mChild;
notifyDataSetChanged();
}
@Override
public int getGroupCount() {
// TODO Auto-generated method stub
return mGroup.size();
}
@Override
public int getChildrenCount(int groupPosition) {
// TODO Auto-generated method stub
return mChild.get(groupPosition).size();
}
@Override
public Object getGroup(int groupPosition) {
// TODO Auto-generated method stub
return mGroup.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return mChild.get(groupPosition).get(childPosition);
}
@Override
public long getGroupId(int groupPosition) {
// TODO Auto-generated method stub
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return childPosition;
}
@Override
public boolean hasStableIds() {
// TODO Auto-generated method stub
return false;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
GroupHolderView groupHolderView;
if(convertView == null){
groupHolderView = new GroupHolderView();
convertView = (View) mInflater.inflate(R.layout.activity_group, null);
groupHolderView.groupTv = (TextView) convertView.findViewById(R.id.my_group_tv);
convertView.setTag(groupHolderView);
}else{
groupHolderView = (GroupHolderView) convertView.getTag();
}
groupHolderView.groupTv.setText(mGroup.get(groupPosition).getName());
return convertView;
}
@Override
public View getChildView(final int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ChildHolderView childHolderView;
if(convertView == null){
childHolderView = new ChildHolderView();
convertView = (View) mInflater.inflate(R.layout.activity_child, null);
childHolderView.childIv = (ImageView) convertView.findViewById(R.id.my_child_iv);
childHolderView.childTv = (TextView) convertView.findViewById(R.id.my_child_tv);
childHolderView.childLl = (LinearLayout) convertView.findViewById(R.id.my_child_ll);
convertView.setTag(childHolderView);
}else{
childHolderView = (ChildHolderView) convertView.getTag();
}
childHolderView.childTv.setText(mChild.get(groupPosition).get(childPosition).getName());
childHolderView.childLl.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(mContext, "group:" + mGroup.get(groupPosition).getName() + "->child:" + mChild.get(groupPosition).get(childPosition).getName(), Toast.LENGTH_SHORT).show();
}
});
return convertView;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
// TODO Auto-generated method stub
return false;
}
class GroupHolderView{
TextView groupTv;
}
class ChildHolderView{
ImageView childIv;
TextView childTv;
LinearLayout childLl;
}
}</span>分析：
GroupHolderView:用于显示组信息
ChildHolderView:用于显示组下成员信息。包括一个LinearLayout,一个ImageView,一个TextVIew
private List<GroupMemberBean> mGroup; 包含组的所有List信息
private List<List<GroupMemberBean>> mChild;包含所有的组下成员信息
<span style="font-size:18px;"> public void updateListView(List<GroupMemberBean> mGroup,List<List<GroupMemberBean>> mChild) {
this.mGroup = mGroup;
this.mChild = mChild;
notifyDataSetChanged();
}</span>根据传入的mGroup，mChild来更新列表信息。7.GroupHolderView类所对应的activity_group.xml
<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/my_group_tv"
android:layout_width="wrap_content"
android:layout_height="50dp"
android:paddingLeft="50dp"
android:gravity="center_vertical"
/>
</LinearLayout></span>
8.ChildHolderView类所对应的activity_child.xml<span style="font-size:18px;"><?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/my_child_ll"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@drawable/my_child_selector"
android:orientation="horizontal" >
<ImageView
android:id="@+id/my_child_iv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/ic_launcher" />
<TextView
android:id="@+id/my_child_tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout></span>分析：根据android:background="@drawable/my_child_selector" 颜色选择器来设置每个列表行(选中或正常)的背景色。9.颜色选择器my_child_selector.xml
<span style="font-size:18px;"><?xml version="1.0" encoding="UTF-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_focused="true" android:drawable="@color/press_color"></item>
<item android:state_pressed="true" android:drawable="@color/press_color"></item>
<item android:drawable="@color/normal_color"></item>
</selector></span>
10.主界面实现代码：MainActivity.java<span style="font-size:18px;">package com.example.myexpandabledemo;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextUtils;
import android.text.TextWatcher;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ExpandableListView;
import android.widget.TextView;
public class MainActivity extends Activity {
private Button myBtn;
private ExpandableListView myExpandLv;
private ClearEditText myClearEt;
private TextView noSearchResultTv;
private MyExpandableAdapter myAdapter;
private List<GroupMemberBean> groupBeanList;
private List<List<GroupMemberBean>> childBeanList = new ArrayList<List<GroupMemberBean>>();
/**
* 汉字转换成拼音的类
*/
private CharacterParser characterParser;
/**
* 根据拼音来排列ListView里面的数据类
*/
private PinyinComparator pinyinComparator;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
private void init() {
noSearchResultTv = (TextView)this.findViewById(R.id.no_search_result_tv);
myExpandLv = (ExpandableListView) this.findViewById(R.id.my_expand_lv);
// 实例化汉字转拼音类
characterParser = CharacterParser.getInstance();
pinyinComparator = new PinyinComparator();
groupBeanList = filledData(this.getResources().getStringArray(
R.array.depart));
List<GroupMemberBean> tempOne = filledData(this.getResources()
.getStringArray(R.array.child_one));
List<GroupMemberBean> tempTwo = filledData(this.getResources()
.getStringArray(R.array.child_two));
// 根据a-z进行排序源数据
Collections.sort(groupBeanList, pinyinComparator);
Collections.sort(tempOne, pinyinComparator);
Collections.sort(tempTwo, pinyinComparator);
for (int i = 0; i < groupBeanList.size(); i++) {
if (i % 2 == 0) {
childBeanList.add(tempOne);
} else {
childBeanList.add(tempTwo);
}
}
//用于生成列表信息
myBtn = (Button) this.findViewById(R.id.my_btn);
myBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myAdapter = new MyExpandableAdapter(MainActivity.this,
groupBeanList, childBeanList);
myExpandLv.setAdapter(myAdapter);
myExpandLv.expandGroup(0);
}
});
myClearEt = (ClearEditText) this.findViewById(R.id.filter_edit);
myClearEt.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
// TODO Auto-generated method stub
filterData(s.toString());
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
/**
* 为ListView填充数据
*
* @param date
* @return
*/
private List<GroupMemberBean> filledData(String[] date) {
List<GroupMemberBean> mSortList = new ArrayList<GroupMemberBean>();
for (int i = 0; i < date.length; i++) {
GroupMemberBean sortModel = new GroupMemberBean();
sortModel.setName(date[i]);
// 汉字转换成拼音
String pinyin = characterParser.getSelling(date[i]);
String sortString = pinyin.substring(0, 1).toUpperCase();
// 正则表达式，判断首字母是否是英文字母
if (sortString.matches("[A-Z]")) {
sortModel.setSortLetters(sortString.toUpperCase());
} else {
sortModel.setSortLetters("#");
}
mSortList.add(sortModel);
}
return mSortList;
}
/**
* 根据输入框中的值来过滤数据并更新ListView
*
* @param filterStr
*/
private void filterData(String filterStr) {
List<GroupMemberBean> groupFilterList = new ArrayList<GroupMemberBean>();
List<GroupMemberBean> tempFilterList;
List<List<GroupMemberBean>> childFilterList = new ArrayList<List<GroupMemberBean>>();
if (TextUtils.isEmpty(filterStr)) {
groupFilterList = groupBeanList;
childFilterList = childBeanList;
noSearchResultTv.setVisibility(View.GONE);
} else {
groupFilterList.clear();
childFilterList.clear();
for (int i = 0; i < groupBeanList.size(); i++) {
//标记departGroup是否加入元素
boolean isAddGroup = false;
tempFilterList = new ArrayList<GroupMemberBean>();
GroupMemberBean sortModel = groupBeanList.get(i);
String name = sortModel.getName();
// depart有字符直接加入
if (name.indexOf(filterStr.toString()) != -1
|| characterParser.getSelling(name).startsWith(
filterStr.toString())) {
if (!groupFilterList.contains(sortModel)) {
groupFilterList.add(sortModel);
isAddGroup = true;
}
}
for (int j = 0; j < childBeanList.get(i).size(); j++) {
GroupMemberBean sortChildModel = childBeanList.get(i)
.get(j);
String childName = sortChildModel.getName();
// child有字符直接加入，其父也加入
if (childName.indexOf(filterStr.toString()) != -1
|| characterParser.getSelling(childName)
.startsWith(filterStr.toString())) {
tempFilterList.add(sortChildModel);
if (!groupFilterList.contains(groupBeanList.get(i))) {
groupFilterList.add(groupBeanList.get(i));
isAddGroup = true;
}
}
}
Collections.sort(tempFilterList, pinyinComparator);
if (isAddGroup) {
childFilterList.add(tempFilterList);
}
}
// 根据a-z进行排序
Collections.sort(groupBeanList, pinyinComparator);
}
if (myAdapter != null) {
myAdapter.updateListView(groupFilterList, childFilterList);
if (TextUtils.isEmpty(filterStr)) {
for (int i = 0; i < groupFilterList.size(); i++) {
if (i == 0) {
myExpandLv.expandGroup(i);
continue;
}
myExpandLv.collapseGroup(i);
}
} else {
//搜索的结果全部展开
for (int i = 0; i < groupFilterList.size(); i++) {
myExpandLv.expandGroup(i);
}
}
}
//如果查询的结果为0时，显示为搜索到结果的提示
if(groupFilterList.size() == 0){
noSearchResultTv.setVisibility(View.VISIBLE);
}else{
noSearchResultTv.setVisibility(View.GONE);
}
}
}
</span>
分析：<span style="font-size:18px;"> myBtn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
myAdapter = new MyExpandableAdapter(MainActivity.this,
groupBeanList, childBeanList);
myExpandLv.setAdapter(myAdapter);
myExpandLv.expandGroup(0);
}
});</span>用于生成列表信息<span style="font-size:18px;">private List<GroupMemberBean> filledData(String[] date) </span>
根据 res->array定义的字符数组，转化为List<GroupMemberBean><span style="font-size:18px;">private void filterData(String filterStr) {</span>根据查询条件更新列表信息，
重点：1.如果查询的条件为空,直接更新列表初始状态；假如：filterStr = “g”;
2.如果查询的结果为空，直接给出“未搜索到结果”提示；
3.如果Group中包含filterStr,GroupMemberBean sortModel 直接加入groupFilterList，并标记已加入isAddGroup = true;
如果Child中包含filterStr,定义临时的tempFilterList,GroupMemberBean sortChildModel加入到childFilterList，如果groupFilterList不包含其父组，并将其父加入到groupFilterList，并标记已加入isAddGroup=true;
最后如果isAddGroup=true，将tempFilterList加入到childFilterList。
4.通过myAdapter.updateListView(groupFilterList, childFilterList)，更新列表信息。
其上为本博文的所有内容。
源代码下载：
http://download.csdn.net/detail/a123demi/7623975
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