Android中索引关联联系人

今天，我将和大家分享如何在Android实现索引，并使用索引来关联电话联系人。

如果从头来说，可能需要很大的篇幅来讲解，我就长话短说，将原理告诉大家，并将核心代码贴出来，供大家参考。

一、实现索引

我们使用重写View的方式来实现索引。即继承View后，重写onDraw(Canvas canvas)方法将A-Z的字母使用Paint绘制出来，代码很简单，其中的核心点就是获取屏幕高度和宽度，并根据A-Z的字母长度来平均的画出来；实现onTouchEvent事件，并根据触摸的变化，来改变显示的状态。下面是实现代码：

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Paint;

import android.graphics.Rect;

import android.util.AttributeSet;

import android.view.MotionEvent;

import android.view.View;

/**

* 索引View

* @author 宋小亮

*

*/

public class IndexView extends View{

private int speration;//字母间距

private String[] word = new String[26];

private Paint paint;//画笔

private OnIndexListener onIndexListener;

public IndexView(Context context) {

super(context);

initViews();

}

public IndexView(Context context, AttributeSet attrs) {

super(context, attrs);

initViews();

}

public IndexView(Context context, AttributeSet attrs, int defStyleAttr) {

super(context, attrs, defStyleAttr);

initViews();

}

@Override

protected void onDraw(Canvas canvas) {

super.onDraw(canvas);

//求出字母间距

int screenHight = this.getHeight();

int screenWidth = this.getWidth();

//字母之间的间隙大小

speration = screenHight/word.length;

//绘制字母

for (int i = 0; i < word.length; i++) {

canvas.drawText(word[i], screenWidth - getFontWidth(word[i]) >> 1, speration * (i + 1), paint);

}

}

/**

* 触摸字母事件

*/

@Override

public boolean onTouchEvent(MotionEvent event) {

int action = event.getAction();

switch(action){

case MotionEvent.ACTION_DOWN:

case MotionEvent.ACTION_MOVE:

float y = event.getY();

int index = (int)(y/speration);

if(index >= word.length){

index = word.length - 1 ;

}

String text = word[index];

//调用回调事件,显示TextView

onIndexListener.show(text);

break;

case MotionEvent.ACTION_UP:

//调用回调事件,隐藏TextView

onIndexListener.hide();

default:

break;

}

return true;

}

/**

*初始化view

*/

private void initViews() {

//初始化字母

for (int i = 0; i < word.length; i++) {

word[i] = (char) (65+i) + "";

}

//初始化画笔,设置画笔属性

paint = new Paint();

paint.setTextSize(20.0f);

paint.setColor(0xff000000);

}

/**

*

* 得到字体的宽度

*

* @param str

* @return

*/

private int getFontWidth(String word) {

Rect rect = new Rect();

paint.getTextBounds(word, 0, word.length(), rect);

return rect.width();

}

/**

* 回调接口

* @author lenovo

*

*/

public interface OnIndexListener{

public void show(String word);

public void hide();

}

/**

* 设值回调

* @param onIndexListener

*/

public void setOnIndexListener(OnIndexListener onIndexListener){

this.onIndexListener = onIndexListener;

}

}

二、联系人

在Android中，我们都知道使用ContentResolver根据Contact Uri来查询系统联系人。返回的结果是一个Cursor结果集，通过该结果集，我们就可以获取联系人姓名，电话，头像，等等。

/** 得到手机通讯录联系人信息 **/

private void initDatas() {

//获取手机联系人

ContentResolver cr = this.getContentResolver();

Cursor cursor = cr.query(Phone.CONTENT_URI, PHONE_PROJECTION, null, null, null);

if(cursor != null){

while(cursor.moveToNext()){

/**手机号**/

String phoneNumber = cursor.getString(PHONES_NUMBER_INDEX);

/**得到联系人名称**/

String contactName = cursor.getString(PHONES_DISPLAY_NAME_INDEX);

/**联系人ID**/

Long contactId = cursor.getLong(PHONES_CONTACT_ID_INDEX);

/**联系人头像ID**/

Long contactPhotoId = cursor.getLong(PHONES_PHOTO_ID_INDEX);

Bitmap contactBm = null;

if(contactPhotoId > 0){

Uri uri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, contactPhotoId);

InputStream is = ContactsContract.Contacts

.openContactPhotoInputStream(cr, uri);

contactBm = BitmapFactory.decodeStream(is);

}else{

contactBm = BitmapFactory.decodeResource(getResources(),

R.drawable.ic_launcher);;

}

mContactsName.add(contactName);

mContactsNumber.add(phoneNumber);

mContactsPhonto.add(contactBm);

}

}

}

此时，在获取完结果后，我们需要对结果进行排序，此时，我们使用了第三方的一个Jar包，（pinyin4j-2.5.0.jar ）通过该jar包可以起送的实现中文转拼音，拼音转中文，两者之间的切换。

package com.example.t3;

import net.sourceforge.pinyin4j.PinyinHelper;

import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType;

import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat;

import net.sourceforge.pinyin4j.format.HanyuPinyinToneType;

import net.sourceforge.pinyin4j.format.HanyuPinyinVCharType;

import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination;

/**

*

* 中文拼音工具类

*

*

* @author 宋小亮

*

*/

public class PingYinUtil {

/**

* 将字符串中的中文转化为拼音,其他字符不变

*

* 张三--->zhangsan

*

* @param inputString

* @return

*/

public static String getPingYin(String inputString) {

HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();

format.setCaseType(HanyuPinyinCaseType.LOWERCASE);

format.setToneType(HanyuPinyinToneType.WITHOUT_TONE);

format.setVCharType(HanyuPinyinVCharType.WITH_V);

char[] input = inputString.trim().toCharArray();

String output = "";

try {

for (int i = 0; i < input.length; i++) {

if (java.lang.Character.toString(input[i]).matches(

"[\\u4E00-\\u9FA5]+")) {

String[] temp = PinyinHelper.toHanyuPinyinStringArray(

input[i], format);

output += temp[0];

} else

output += java.lang.Character.toString(input[i]);

}

} catch (BadHanyuPinyinOutputFormatCombination e) {

e.printStackTrace();

}

return output;

}

/**

* 汉字转换位汉语拼音首字母，英文字符不变

*

*

* 张三--->ZS

*

* @param chines

* 汉字

* @return 拼音

*/

public static String converterToFirstSpell(String chines) {

String pinyinName = "";

char[] nameChar = chines.toCharArray();

HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();

defaultFormat.setCaseType(HanyuPinyinCaseType.UPPERCASE);

defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);

for (int i = 0; i < nameChar.length; i++) {

if (nameChar[i] > 128) {

try {

pinyinName += PinyinHelper.toHanyuPinyinStringArray(

nameChar[i], defaultFormat)[0].charAt(0);

} catch (BadHanyuPinyinOutputFormatCombination e) {

e.printStackTrace();

}

} else {

pinyinName += nameChar[i];

}

}

return pinyinName;

}

}

在我们根据联系人名称获取到首字母进行排序，并得到排序后的结果，此时我们就完成了该功能，其中的难点是：将联系人名称转换为拼音，并根据首字母进行排序；下面是核心代码：

package com.example.t3;

import java.io.InputStream;

import java.util.ArrayList;

import android.app.Activity;

import android.content.ContentResolver;

import android.content.ContentUris;

import android.database.Cursor;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.net.Uri;

import android.os.Bundle;

import android.provider.ContactsContract;

import android.provider.ContactsContract.CommonDataKinds.Phone;

import android.provider.ContactsContract.CommonDataKinds.Photo;

import android.view.View;

import android.view.ViewGroup;

import android.widget.BaseAdapter;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

import com.example.t3.view.IndexView;

import com.example.t3.view.IndexView.OnIndexListener;

public class MainActivity extends Activity implements OnIndexListener{

private TextView tv_show;

private ListView lv_contact;

private IndexView indexView;

private String[] title;

private static final String[] PHONE_PROJECTION = new String[]{

Phone.DISPLAY_NAME,Phone.NUMBER,Photo.PHOTO_ID,Phone.CONTACT_ID

};

/** 联系人显示名称 **/

private static final int PHONES_DISPLAY_NAME_INDEX = 0;

/** 电话号码 **/

private static final int PHONES_NUMBER_INDEX = 1;

/** 头像ID **/

private static final int PHONES_PHOTO_ID_INDEX = 2;

/** 联系人的ID **/

private static final int PHONES_CONTACT_ID_INDEX = 3;

/** 联系人名称 **/

private ArrayList<String> mContactsName = new ArrayList<String>();

/** 联系人号码 **/

private ArrayList<String> mContactsNumber = new ArrayList<String>();

/** 联系人头像 **/

private ArrayList<Bitmap> mContactsPhonto = new ArrayList<Bitmap>();

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

initViews();

initDatas();

title = new String[mContactsName.size()];

DataInit();

MyAdapter adapter = new MyAdapter();

lv_contact.setAdapter(adapter);

}

/** 得到手机通讯录联系人信息 **/

private void initDatas() {

//获取手机联系人

ContentResolver cr = this.getContentResolver();

Cursor cursor = cr.query(Phone.CONTENT_URI, PHONE_PROJECTION, null, null, null);

if(cursor != null){

while(cursor.moveToNext()){

/**手机号**/

String phoneNumber = cursor.getString(PHONES_NUMBER_INDEX);

/**得到联系人名称**/

String contactName = cursor.getString(PHONES_DISPLAY_NAME_INDEX);

/**联系人ID**/

Long contactId = cursor.getLong(PHONES_CONTACT_ID_INDEX);

/**联系人头像ID**/

Long contactPhotoId = cursor.getLong(PHONES_PHOTO_ID_INDEX);

Bitmap contactBm = null;

if(contactPhotoId > 0){

Uri uri = ContentUris.withAppendedId(ContactsContract.Contacts.CONTENT_URI, contactPhotoId);

InputStream is = ContactsContract.Contacts

.openContactPhotoInputStream(cr, uri);

contactBm = BitmapFactory.decodeStream(is);

}else{

contactBm = BitmapFactory.decodeResource(getResources(),

R.drawable.ic_launcher);;

}

mContactsName.add(contactName);

mContactsNumber.add(phoneNumber);

mContactsPhonto.add(contactBm);

}

}

}

public void DataInit() {

// 中文排序

// Comparator cmp = Collator.getInstance(java.util.Locale.CHINA);

// Arrays.sort(name, cmp);

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

String str = PingYinUtil.converterToFirstSpell(mContactsName.get(i)

.substring(0, 1));

title[i] = str;

}

for (int i = 0; i < title.length; i++) {

for (int j = i + 1; j < title.length; j++) {

if (title[i].charAt(0) > title[j].charAt(0)) {

String str = title[i];

title[i] = title[j];

title[j] = str;

String str2 = mContactsName.get(i);

mContactsName.set(i, mContactsName.get(j));

mContactsName.set(j, str2);

String str3 = mContactsNumber.get(i);

mContactsNumber.set(i, mContactsNumber.get(j));

mContactsNumber.set(j, str3);

Bitmap temp = mContactsPhonto.get(i);

mContactsPhonto.set(i, mContactsPhonto.get(j));

mContactsPhonto.set(j, temp);

}

}

}

}

private void initViews() {

tv_show = (TextView)findViewById(R.id.tv1);

lv_contact = (ListView)findViewById(R.id.lv_contact);

indexView = (IndexView)findViewById(R.id.indexView);

indexView.setOnIndexListener(this);

}

@Override

public void show(String word) {

tv_show.setText(word);

tv_show.setVisibility(View.VISIBLE);

for (int i = 0; i < title.length; i++) {

if(title[i].equals(word)){

lv_contact.setSelection(i);

break;

}

}

}

@Override

public void hide() {

tv_show.setVisibility(View.GONE);

}

public class MyAdapter extends BaseAdapter{

@Override

public int getCount() {

// TODO Auto-generated method stub

return mContactsName.size();

}

@Override

public Object getItem(int position) {

// TODO Auto-generated method stub

return mContactsName.get(position);

}

@Override

public long getItemId(int position) {

// TODO Auto-generated method stub

return position;

}

@Override

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

ViewOptimize viewOptimize;

if (convertView == null) {

convertView = getLayoutInflater().inflate(R.layout.list_item,

null);

viewOptimize = new ViewOptimize();

viewOptimize.tv_name = (TextView) convertView

.findViewById(R.id.dianhua_name);

viewOptimize.tv_phonoNum = (TextView) convertView

.findViewById(R.id.dianhua_number);

viewOptimize.img_photo = (ImageView) convertView

.findViewById(R.id.dianhua_photo);

viewOptimize.tv_title = (TextView) convertView

.findViewById(R.id.title);

convertView.setTag(viewOptimize);

} else {

viewOptimize = (ViewOptimize) convertView.getTag();

}

String text = mContactsName.get(position);

viewOptimize.tv_name.setText(text);

viewOptimize.tv_phonoNum.setText(mContactsNumber.get(position));

// if (mContactsPhonto.get(position) == null) {

// Log.e(" ", " 2222222222222222");

// }

viewOptimize.img_photo

.setImageBitmap(mContactsPhonto.get(position));

String str2 = title[position];

if (position > 0) {

String str1 = title[position - 1];

if (str2.equals(str1)) {

viewOptimize.tv_title.setVisibility(View.GONE);

} else {

viewOptimize.tv_title.setVisibility(View.VISIBLE);

viewOptimize.tv_title.setText(str2);

}

} else {

viewOptimize.tv_title.setVisibility(View.VISIBLE);

viewOptimize.tv_title.setText(str2);

}

return convertView;

}

public class ViewOptimize {

TextView tv_title;

TextView tv_name;

/** 电话号码 */

TextView tv_phonoNum;

/** 头像 */

ImageView img_photo;

}

}

}

到此为止，我们就轻松实现了炫酷的功能！