Android 实现系统联系人软件的分组和字母表导航效果（优化版）

以下代码经过测试，可以通过，无需下载，只要照着执行就可以run

注意：

androidmanifest.xml文件中添加以下权限

<uses-permission android:name="android.permission.READ_CONTACTS" />

注意正则表达式的那块代码，很多转载的文章那里代码直接ctrl+c是错误的

解惑：

当你电话本中没有数据的时候，应该没有数据；当电话本中没有P打头的，你现在点击P导航，也是无法切的P的位置，其他字母类似。

1.FastContactSearchDemoActivity.java

[java] view
plaincopy





package com.zhf.FastContactSearchWithAlphabeticBarDemo;

import java.util.ArrayList;

import java.util.Collections;

import java.util.HashMap;

import java.util.List;

import java.util.Set;

import java.util.regex.Pattern;

import com.zhf.FastContactSearchDemo.R;

import android.app.Activity;

import android.content.AsyncQueryHandler;

import android.content.ContentResolver;

import android.content.ContentValues;

import android.content.Context;

import android.database.Cursor;

import android.net.Uri;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ListView;

import android.widget.TextView;

/**

* 联系人分章节显示、ListView快速滑动显示联系人首字母、附带字母表快速查找的例子

* 查阅网络资源，实现方式都是比较复杂，尤其有些还实现了SectionIndex接口，很多人不怎么能理解，研究后发现此种类型的例子没必要也不应该那么实现

* @author hiphonezhu@sina.com

*

*/

public class FastContactSearchDemoActivity extends Activity {

private BaseAdapter adapter;

private ListView personList;

private List<ContentValues> list;

private AsyncQueryHandler asyncQuery;

private QuickAlphabeticBar alpha;

private static final String NAME = "name", NUMBER = "number",

SORT_KEY = "sort_key";

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

personList = (ListView) findViewById(R.id.listView);

alpha = (QuickAlphabeticBar) findViewById(R.id.fast_scroller);

asyncQuery = new MyAsyncQueryHandler(getContentResolver());

}

@Override

protected void onResume() {

super.onResume();

Uri uri = Uri.parse("content://com.android.contacts/data/phones"); // 联系人的Uri

String[] projection = { "_id", "display_name", "data1", "sort_key" }; // 查询的列

asyncQuery.startQuery(0, null, uri, projection, null, null,

"sort_key COLLATE LOCALIZED asc"); // 按照sort_key升序查询

}

/**

* 数据库异步查询类AsyncQueryHandler

*

* @author administrator

*

*/

private class MyAsyncQueryHandler extends AsyncQueryHandler {

public MyAsyncQueryHandler(ContentResolver cr) {

super(cr);

}

/**

* 查询结束的回调函数

*/

@Override

protected void onQueryComplete(int token, Object cookie, Cursor cursor) {

if (cursor != null && cursor.getCount() > 0) {

list = new ArrayList<ContentValues>();

cursor.moveToFirst();

for (int i = 0; i < cursor.getCount(); i++) {

ContentValues cv = new ContentValues();

cursor.moveToPosition(i);

String name = cursor.getString(1);

String number = cursor.getString(2);

String sortKey = cursor.getString(3);

if (number.startsWith("+86")) {// 去除多余的中国地区号码标志，对这个程序没有影响。

cv.put(NAME, name);

cv.put(NUMBER, number.substring(3));

cv.put(SORT_KEY, sortKey);

} else {

cv.put(NAME, name);

cv.put(NUMBER, number);

cv.put(SORT_KEY, sortKey);

}

list.add(cv);

}

if (list.size() > 0) {

setAdapter(list);

}

}

}

}

private void setAdapter(List<ContentValues> list) {

adapter = new ListAdapter(this, list);

personList.setAdapter(adapter);

alpha.init(FastContactSearchDemoActivity.this);

alpha.setListView(personList);

alpha.setHight(alpha.getHeight());

alpha.setVisibility(View.VISIBLE);

}

private static class ViewHolder {

TextView alpha;

TextView name;

TextView number;

}

/*

* 移植时只需要提供一个已排序的集合list即可

*/

private class ListAdapter extends BaseAdapter{

private LayoutInflater inflater;

private List<ContentValues> list;

private HashMap<String, Integer> alphaIndexer;//保存每个索引在list中的位置【#-0，A-4，B-10】

private String[] sections;//每个分组的索引表【A,B,C,F...】

public ListAdapter(Context context, List<ContentValues> list) {

this.inflater = LayoutInflater.from(context);

this.list = list; // 该list是已经排序过的集合，有些项目中的数据必须要自己进行排序。

this.alphaIndexer = new HashMap<String, Integer>();

this.sections = new String[list.size()];

for (int i =0; i <list.size(); i++) {

String name = getAlpha(list.get(i).getAsString(SORT_KEY));

if(!alphaIndexer.containsKey(name)){//只记录在list中首次出现的位置

alphaIndexer.put(name, i);

}

}

Set<String> sectionLetters = alphaIndexer.keySet();

ArrayList<String> sectionList = new ArrayList<String>(

sectionLetters);

Collections.sort(sectionList);

sections = new String[sectionList.size()];

sectionList.toArray(sections);

alpha.setAlphaIndexer(alphaIndexer);

}

@Override

public int getCount() {

return list.size();

}

@Override

public Object getItem(int position) {

return list.get(position);

}

@Override

public long getItemId(int position) {

return position;

}

@Override

public View getView(int position, View convertView, ViewGroup parent) {

ViewHolder holder;

if (convertView == null) {

convertView = inflater.inflate(R.layout.list_item, null);

holder = new ViewHolder();

holder.alpha = (TextView) convertView.findViewById(R.id.alpha);

holder.name = (TextView) convertView.findViewById(R.id.name);

holder.number = (TextView) convertView

.findViewById(R.id.number);

convertView.setTag(holder);

} else {

holder = (ViewHolder) convertView.getTag();

}

ContentValues cv = list.get(position);

String name = cv.getAsString(NAME);

String number = cv.getAsString(NUMBER);

holder.name.setText(name);

holder.number.setText(number);

// 当前联系人的sortKey

String currentStr = getAlpha(list.get(position).getAsString(

SORT_KEY));

// 上一个联系人的sortKey

String previewStr = (position - 1) >= 0 ? getAlpha(list.get(

position - 1).getAsString(SORT_KEY)) : " ";

/**

* 判断显示#、A-Z的TextView隐藏与可见

*/

if (!previewStr.equals(currentStr)) { // 当前联系人的sortKey！=上一个联系人的sortKey，说明当前联系人是新组。

holder.alpha.setVisibility(View.VISIBLE);

holder.alpha.setText(currentStr);

} else {

holder.alpha.setVisibility(View.GONE);

}

return convertView;

}

}

/**

* 提取英文的首字母，非英文字母用#代替。

*

* @param str

* @return

*/

private String getAlpha(String str) {

if (str == null) {

return "#";

}

if (str.trim().length() == 0) {

return "#";

}

char c = str.trim().substring(0, 1).charAt(0);

// 正则表达式，判断首字母是否是英文字母

Pattern pattern = Pattern.compile("^[A-Za-z]+$");

if (pattern.matcher(c + "").matches()) {

return (c + "").toUpperCase(); // 大写输出

} else {

return "#";

}

}

}

2.QuickAlphabeticBar.java

[java] view
plaincopy





package com.zhf.FastContactSearchWithAlphabeticBarDemo;

import java.util.HashMap;

import com.zhf.FastContactSearchDemo.R;

import android.app.Activity;

import android.content.Context;

import android.os.Handler;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.view.View;

import android.widget.ImageButton;

import android.widget.ListView;

import android.widget.TextView;

/**

* 字母表

* @author hiphonezhu@sina.com

*

*/

public class QuickAlphabeticBar extends ImageButton {

private TextView mDialogText;

private Handler mHandler;

private ListView mList;

private float mHight;

private String[] letters = new String[] { "#", "A", "B", "C", "D", "E",

"F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R",

"S", "T", "U", "V", "W", "X", "Y", "Z" };

private HashMap<String, Integer> alphaIndexer;

public QuickAlphabeticBar(Context context) {

super(context);

}

public QuickAlphabeticBar(Context context, AttributeSet attrs) {

super(context, attrs);

}

public QuickAlphabeticBar(Context context, AttributeSet attrs, int defStyle) {

super(context, attrs, defStyle);

}

public void init(Activity ctx) {

mDialogText = (TextView) ctx.findViewById(R.id.fast_position);

mDialogText.setVisibility(View.INVISIBLE);

mHandler = new Handler();

}

public void setListView(ListView mList) {

this.mList = mList;

}

public void setAlphaIndexer(HashMap<String, Integer> alphaIndexer) {

this.alphaIndexer = alphaIndexer;

}

public void setHight(float mHight) {

this.mHight = mHight;

}

@Override

public boolean onTouchEvent(MotionEvent event) {

int act = event.getAction();

float y = event.getY();

// 计算手指位置，找到对应的段，让mList移动段开头的位置上

int selectIndex = (int) (y / (mHight / 27));

if (selectIndex < 27) {// 防止越界

String key = letters[selectIndex];

if (alphaIndexer.containsKey(key)) {

int pos = alphaIndexer.get(key);

if (mList.getHeaderViewsCount() > 0) {// 防止ListView有标题栏，本例中没有。

this.mList.setSelectionFromTop(

pos + mList.getHeaderViewsCount(), 0);

} else {

this.mList.setSelectionFromTop(pos, 0);

}

mDialogText.setText(letters[selectIndex]);

}

}

if (act == MotionEvent.ACTION_DOWN) {

if (mHandler != null) {

mHandler.post(new Runnable() {

@Override

public void run() {

if (mDialogText != null

&& mDialogText.getVisibility() == View.INVISIBLE) {

mDialogText.setVisibility(VISIBLE);

}

}

});

}

} else if (act == MotionEvent.ACTION_UP) {

if (mHandler != null) {

mHandler.post(new Runnable() {

@Override

public void run() {

if (mDialogText != null

&& mDialogText.getVisibility() == View.VISIBLE) {

mDialogText.setVisibility(INVISIBLE);

}

}

});

}

}

return super.onTouchEvent(event);

}

}

3.布局文件

3.1.main.xml

[java] view
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<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout android:layout_width="fill_parent"

xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_height="fill_parent" android:layout_weight="1.0">

<ListView android:id="@+id/listView"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:scrollbars="none"

android:layout_weight="1.0"

android:scrollingCache="true"

>

</ListView>

<com.zhf.FastContactSearchWithAlphabeticBarDemo.QuickAlphabeticBar

android:layout_alignRight="@id/listView"

android:layout_gravity="top|right|center"

android:layout_marginTop="10dip"

android:id="@+id/fast_scroller" android:background="@null"

android:layout_width="wrap_content" android:layout_height="wrap_content"

android:scaleType="centerInside"

android:src="@drawable/dic_background" />

<TextView

android:layout_centerInParent="true"

android:id="@+id/fast_position" android:textSize="48dip" android:visibility="invisible"

android:textColor="#404040" android:background="@drawable/sort_icon_bg_click"

android:layout_gravity="center_horizontal|top" android:padding="2dip"

android:layout_margin="34dip" android:layout_width="70dip"

android:layout_height="70dip" android:gravity="center" />

</RelativeLayout>

3.2.list_item.xml

[java] view
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<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent" >

<!-- 首字母 -->

<TextView

android:id="@+id/alpha"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:background="#333333"

android:paddingLeft="10dip"

android:textColor="#FFFFFF"

android:visibility="gone" />

<!-- 联系人信息 -->

<ImageView

android:id="@+id/imageView"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignParentLeft="true"

android:layout_below="@id/alpha"

android:src="@drawable/ic_launcher" />

<TextView

android:id="@+id/name"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignTop="@id/imageView"

android:layout_marginLeft="2.0dip"

android:layout_marginRight="5.0dip"

android:layout_marginTop="6.0dip"

android:layout_toRightOf="@id/imageView"

android:singleLine="true"

android:textAppearance="?android:textAppearanceMedium" />

<TextView

android:id="@+id/number"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_alignLeft="@id/name"

android:layout_alignWithParentIfMissing="true"

android:layout_below="@id/name"

android:ellipsize="marquee"

android:singleLine="true"

android:textAppearance="?android:textAppearanceSmall" />

</RelativeLayout>

dic_background.xml

<?xml version="1.0" encoding="UTF-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">

<item android:state_pressed="true" android:drawable="@drawable/a_z_click" />

<item android:state_focused="true" android:state_enabled="true"

android:drawable="@drawable/a_z_click" />

<item android:state_enabled="true" android:drawable="@drawable/a_z" />

</selector>

4.效果图



源码地址：http://download.csdn.net/detail/zhf198909/4485281