public class ContactsModel{/**昵称首汉字的拼音首字母。用于显示*/private String sortLetter;/**昵称首汉字的全拼音。用于排序*/private String sortPinyin;private String userId;private String name;private String gender;private Drawable photo;public Drawable getPhoto() {return photo;}public void setPhoto(Drawable photo) {this.photo = photo;}public void setPhoto(String photo) {this.photo = ViewUtils.StringToDrawable(photo);}//...
}

public class ViewUtils {    /*** 将照片存储为字符串形式(经过BASE64编码)*/public static String DrawableToString(Drawable drawable) {if(drawable == null){return "";}BitmapDrawable bd = (BitmapDrawable)drawable;Bitmap bmp = bd.getBitmap();if(bmp == null)return "";ByteArrayOutputStream stream = new ByteArrayOutputStream();//压缩图片bmp.compress(Bitmap.CompressFormat.PNG, 60, stream);byte[] b = stream.toByteArray();// Base64Coder编码，将图片流以字符串形式存储下来return Base64Coder.encodeLines(b);}/*** 将Base64Coder编码后的字符串转换为Drawable*/public static Drawable StringToDrawable(String encodeStr) {if(encodeStr==null || encodeStr.isEmpty()){return null;}//Base64Coder解码ByteArrayInputStream in = new ByteArrayInputStream(Base64Coder.decodeLines(encodeStr));Bitmap dBitmap = BitmapFactory.decodeStream(in);Drawable drawable = new BitmapDrawable(dBitmap);return drawable;}
}

其中，Base64Coder不是SDK库函数，可以在 http://www.source-code.biz/base64coder/java/ 获得。

public class SideBar extends View {/**触摸事件*/private OnTouchingLetterChangedListener mOnTouchingLetterChangedListener;/**26个字母*/public static String[] mLetters = { "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", "#" };/**是否按压状态*/private boolean mIsPress;/**选中字母位置*/private int mChoose = -1;private Paint mPaint = new Paint();private TextView mTextDialog;public SideBar(Context context, AttributeSet attrs, int defStyle) {super(context, attrs, defStyle);setBackgroundDrawable(new ColorDrawable(0xFFFFFFFF));}public SideBar(Context context, AttributeSet attrs) {super(context, attrs);setBackgroundDrawable(new ColorDrawable(0xFFFFFFFF));}public SideBar(Context context) {super(context);setBackgroundDrawable(new ColorDrawable(0xFFFFFFFF));}protected void onDraw(Canvas canvas) {super.onDraw(canvas);// 获取焦点改变背景颜色.int height = getHeight();// 获取对应高度int width = getWidth(); // 获取对应宽度int singleHeight = height / mLetters.length;// 获取每一个字母的高度if(mIsPress)//处于按压态{for (int i = 0; i < mLetters.length; i++) {//字体改为黑色粗体mPaint.setColor(Color.parseColor("#000000"));mPaint.setTypeface(Typeface.DEFAULT_BOLD);mPaint.setAntiAlias(true);mPaint.setTextSize(18);// 选中的状态if (i == mChoose) {mPaint.setColor(Color.parseColor("#FFFFFF"));mPaint.setFakeBoldText(true);}// x坐标等于中间-字符串宽度的一半.float xPos = width / 2 - mPaint.measureText(mLetters[i]) / 2;float yPos = singleHeight * i + singleHeight;canvas.drawText(mLetters[i], xPos, yPos, mPaint);mPaint.reset();// 重置画笔}}else//正常状态{for (int i = 0; i < mLetters.length; i++) {mPaint.setColor(Color.parseColor("#E0E0E0"));mPaint.setTypeface(Typeface.DEFAULT);mPaint.setAntiAlias(true);mPaint.setTextSize(16);// x坐标等于中间-字符串宽度的一半.float xPos = width / 2 - mPaint.measureText(mLetters[i]) / 2;float yPos = singleHeight * i + singleHeight;canvas.drawText(mLetters[i], xPos, yPos, mPaint);mPaint.reset();// 重置画笔}}}@Overridepublic boolean dispatchTouchEvent(MotionEvent event) {final int action = event.getAction();final float y = event.getY();// 点击y坐标final int oldChoose = mChoose;final OnTouchingLetterChangedListener listener = mOnTouchingLetterChangedListener;// 点击y坐标所占总高度的比例*mLetters数组的长度就等于点击mLetters中的个数.final int c = (int) (y / getHeight() * mLetters.length);switch (action) {case MotionEvent.ACTION_UP:setBackgroundDrawable(new ColorDrawable(0xFFFFFFFF));mChoose = -1;//mIsPress = false;invalidate();if (mTextDialog != null) {//隐藏字母mTextDialog.setVisibility(View.GONE);}break;default:setBackgroundResource(R.drawable.sidebar_background);if (oldChoose != c) {if (c >= 0 && c < mLetters.length) {if (listener != null) {listener.onTouchingLetterChanged(mLetters[c]);}if (mTextDialog != null) {//显示字母mTextDialog.setText(mLetters[c]);mTextDialog.setVisibility(View.VISIBLE);}mChoose = c;mIsPress = true;invalidate();}}break;}return true;}/**设置用于显示当前字母的TextView*/public void setTextView(TextView mTextDialog) {this.mTextDialog = mTextDialog;}/*** 设置按压监听*/public void setOnTouchingLetterChangedListener(OnTouchingLetterChangedListener onTouchingLetterChangedListener) {this.mOnTouchingLetterChangedListener = onTouchingLetterChangedListener;}public interface OnTouchingLetterChangedListener {public void onTouchingLetterChanged(String s);}}

3. CharacterParser：汉字转拼音类。需要先将汉字转换为ASCII码，然后得到对应的拼音。此处的拼音为无声调的拼音。

public class CharacterParser {private static int[] pyvalue = new int[] {-20319, -20317, -20304, -20295, -20292, -20283, -20265, -20257, -20242, -20230, -20051, -20036, -20032,-20026, -20002, -19990, -19986, -19982, -19976, -19805, -19784, -19775, -19774, -19763, -19756, -19751, -19746, -19741, -19739, -19728,-19725, -19715, -19540, -19531, -19525, -19515, -19500, -19484, -19479, -19467, -19289, -19288, -19281, -19275, -19270, -19263, -19261,-19249, -19243, -19242, -19238, -19235, -19227, -19224, -19218, -19212, -19038, -19023, -19018, -19006, -19003, -18996, -18977, -18961,-18952, -18783, -18774, -18773, -18763, -18756, -18741, -18735, -18731, -18722, -18710, -18697, -18696, -18526, -18518, -18501, -18490,-18478, -18463, -18448, -18447, -18446, -18239, -18237, -18231, -18220, -18211, -18201, -18184, -18183, -18181, -18012, -17997, -17988,-17970, -17964, -17961, -17950, -17947, -17931, -17928, -17922, -17759, -17752, -17733, -17730, -17721, -17703, -17701, -17697, -17692,-17683, -17676, -17496, -17487, -17482, -17468, -17454, -17433, -17427, -17417, -17202, -17185, -16983, -16970, -16942, -16915, -16733,-16708, -16706, -16689, -16664, -16657, -16647, -16474, -16470, -16465, -16459, -16452, -16448, -16433, -16429, -16427, -16423, -16419,-16412, -16407, -16403, -16401, -16393, -16220, -16216, -16212, -16205, -16202, -16187, -16180, -16171, -16169, -16158, -16155, -15959,-15958, -15944, -15933, -15920, -15915, -15903, -15889, -15878, -15707, -15701, -15681, -15667, -15661, -15659, -15652, -15640, -15631,-15625, -15454, -15448, -15436, -15435, -15419, -15416, -15408, -15394, -15385, -15377, -15375, -15369, -15363, -15362, -15183, -15180,-15165, -15158, -15153, -15150, -15149, -15144, -15143, -15141, -15140, -15139, -15128, -15121, -15119, -15117, -15110, -15109, -14941,-14937, -14933, -14930, -14929, -14928, -14926, -14922, -14921, -14914, -14908, -14902, -14894, -14889, -14882, -14873, -14871, -14857,-14678, -14674, -14670, -14668, -14663, -14654, -14645, -14630, -14594, -14429, -14407, -14399, -14384, -14379, -14368, -14355, -14353,-14345, -14170, -14159, -14151, -14149, -14145, -14140, -14137, -14135, -14125, -14123, -14122, -14112, -14109, -14099, -14097, -14094,-14092, -14090, -14087, -14083, -13917, -13914, -13910, -13907, -13906, -13905, -13896, -13894, -13878, -13870, -13859, -13847, -13831,-13658, -13611, -13601, -13406, -13404, -13400, -13398, -13395, -13391, -13387, -13383, -13367, -13359, -13356, -13343, -13340, -13329,-13326, -13318, -13147, -13138, -13120, -13107, -13096, -13095, -13091, -13076, -13068, -13063, -13060, -12888, -12875, -12871, -12860,-12858, -12852, -12849, -12838, -12831, -12829, -12812, -12802, -12607, -12597, -12594, -12585, -12556, -12359, -12346, -12320, -12300,-12120, -12099, -12089, -12074, -12067, -12058, -12039, -11867, -11861, -11847, -11831, -11798, -11781, -11604, -11589, -11536, -11358,-11340, -11339, -11324, -11303, -11097, -11077, -11067, -11055, -11052, -11045, -11041, -11038, -11024, -11020, -11019, -11018, -11014,-10838, -10832, -10815, -10800, -10790, -10780, -10764, -10587, -10544, -10533, -10519, -10331, -10329, -10328, -10322, -10315, -10309,-10307, -10296, -10281, -10274, -10270, -10262, -10260, -10256, -10254};public static String[] pystr = new String[] {"a", "ai", "an", "ang", "ao", "ba", "bai", "ban", "bang", "bao", "bei", "ben", "beng", "bi", "bian","biao", "bie", "bin", "bing", "bo", "bu", "ca", "cai", "can", "cang", "cao", "ce", "ceng", "cha", "chai", "chan", "chang", "chao", "che","chen", "cheng", "chi", "chong", "chou", "chu", "chuai", "chuan", "chuang", "chui", "chun", "chuo", "ci", "cong", "cou", "cu", "cuan","cui", "cun", "cuo", "da", "dai", "dan", "dang", "dao", "de", "deng", "di", "dian", "diao", "die", "ding", "diu", "dong", "dou", "du","duan", "dui", "dun", "duo", "e", "en", "er", "fa", "fan", "fang", "fei", "fen", "feng", "fo", "fou", "fu", "ga", "gai", "gan", "gang","gao", "ge", "gei", "gen", "geng", "gong", "gou", "gu", "gua", "guai", "guan", "guang", "gui", "gun", "guo", "ha", "hai", "han", "hang","hao", "he", "hei", "hen", "heng", "hong", "hou", "hu", "hua", "huai", "huan", "huang", "hui", "hun", "huo", "ji", "jia", "jian","jiang", "jiao", "jie", "jin", "jing", "jiong", "jiu", "ju", "juan", "jue", "jun", "ka", "kai", "kan", "kang", "kao", "ke", "ken","keng", "kong", "kou", "ku", "kua", "kuai", "kuan", "kuang", "kui", "kun", "kuo", "la", "lai", "lan", "lang", "lao", "le", "lei", "leng","li", "lia", "lian", "liang", "liao", "lie", "lin", "ling", "liu", "long", "lou", "lu", "lv", "luan", "lue", "lun", "luo", "ma", "mai","man", "mang", "mao", "me", "mei", "men", "meng", "mi", "mian", "miao", "mie", "min", "ming", "miu", "mo", "mou", "mu", "na", "nai","nan", "nang", "nao", "ne", "nei", "nen", "neng", "ni", "nian", "niang", "niao", "nie", "nin", "ning", "niu", "nong", "nu", "nv", "nuan","nue", "nuo", "o", "ou", "pa", "pai", "pan", "pang", "pao", "pei", "pen", "peng", "pi", "pian", "piao", "pie", "pin", "ping", "po", "pu","qi", "qia", "qian", "qiang", "qiao", "qie", "qin", "qing", "qiong", "qiu", "qu", "quan", "que", "qun", "ran", "rang", "rao", "re","ren", "reng", "ri", "rong", "rou", "ru", "ruan", "rui", "run", "ruo", "sa", "sai", "san", "sang", "sao", "se", "sen", "seng", "sha","shai", "shan", "shang", "shao", "she", "shen", "sheng", "shi", "shou", "shu", "shua", "shuai", "shuan", "shuang", "shui", "shun","shuo", "si", "song", "sou", "su", "suan", "sui", "sun", "suo", "ta", "tai", "tan", "tang", "tao", "te", "teng", "ti", "tian", "tiao","tie", "ting", "tong", "tou", "tu", "tuan", "tui", "tun", "tuo", "wa", "wai", "wan", "wang", "wei", "wen", "weng", "wo", "wu", "xi","xia", "xian", "xiang", "xiao", "xie", "xin", "xing", "xiong", "xiu", "xu", "xuan", "xue", "xun", "ya", "yan", "yang", "yao", "ye", "yi","yin", "ying", "yo", "yong", "you", "yu", "yuan", "yue", "yun", "za", "zai", "zan", "zang", "zao", "ze", "zei", "zen", "zeng", "zha","zhai", "zhan", "zhang", "zhao", "zhe", "zhen", "zheng", "zhi", "zhong", "zhou", "zhu", "zhua", "zhuai", "zhuan", "zhuang", "zhui","zhun", "zhuo", "zi", "zong", "zou", "zu", "zuan", "zui", "zun", "zuo"};private static CharacterParser characterParser = new CharacterParser();public static CharacterParser getInstance() {return characterParser;}/** * 汉字转成ASCII码 */private int getChsAscii(String chs) {int asc = 0;try {byte[] bytes = chs.getBytes("gb2312");if (bytes == null || bytes.length > 2 || bytes.length <= 0) {throw new RuntimeException("illegal resource string");}if (bytes.length == 1) { // 英文字符asc = bytes[0];}if (bytes.length == 2) {// 中文字符int hightByte = 256 + bytes[0];int lowByte = 256 + bytes[1];asc = (256 * hightByte + lowByte) - 256 * 256;}} catch (Exception e) {e.printStackTrace();}return asc;}/** * 单字解析  */public String convert(String str) {String result = null;int ascii = getChsAscii(str);if (ascii > 0 && ascii < 160) {result = String.valueOf((char) ascii);} else {for (int i = (pyvalue.length - 1); i >= 0; i--) {if (pyvalue[i] <= ascii) {result = pystr[i];break;}}}return result;}/** * 词组解析  */public String getSelling(String chs) {String key, value;StringBuilder sb = new StringBuilder();for (int i = 0; i < chs.length(); i++) {key = chs.substring(i, i + 1);if (key.getBytes().length >= 2) {value = (String) convert(key);if (value == null) {value = "unknown";}} else {value = key;}sb.append(value);}return sb.toString();}
}

4. ContactsAdapter：好友列表适配器。

public class ContactsAdapter extends BaseAdapter implements SectionIndexer{private List<ContactsModel> list = null;private Context mContext;public ContactsAdapter(Context mContext, List<ContactsModel> list) {this.mContext = mContext;this.list = list;}/*** 当ListView数据发生变化时,调用此方法来更新ListView*/public void updateListView(List<ContactsModel> list){this.list = list;notifyDataSetChanged();}public int getCount() {return this.list.size();}public Object getItem(int position) {return list.get(position);}public long getItemId(int position) {return position;}public View getView(final int position, View view, ViewGroup arg2) {ViewHolder viewHolder = null;final ContactsModel contactsModel = list.get(position);if (view == null) {viewHolder = new ViewHolder();view = LayoutInflater.from(mContext).inflate(R.layout.listview_item_contacts, null);viewHolder.tvTitleLayout = (LinearLayout) view.findViewById(R.id.contacts_catalogLayout);viewHolder.tvLetter = (TextView) view.findViewById(R.id.contacts_catalog);viewHolder.tvPhoto = (ImageView) view.findViewById(R.id.contacts_photo);viewHolder.tvName = (TextView) view.findViewById(R.id.contacts_friend);view.setTag(viewHolder);} else {viewHolder = (ViewHolder) view.getTag();}//根据position获取分类的首字母的Char ascii值int section = getSectionForPosition(position);//如果当前位置等于该分类首字母的Char的位置 ，则认为是第一次出现if(position == getPositionForSection(section)){viewHolder.tvTitleLayout.setVisibility(View.VISIBLE);viewHolder.tvLetter.setText(contactsModel.getSortLetter());}else{viewHolder.tvTitleLayout.setVisibility(View.GONE);}Drawable drawable = contactsModel.getPhoto();if(drawable != null){viewHolder.tvPhoto.setImageDrawable(drawable);}else{viewHolder.tvPhoto.setImageDrawable(mContext.getResources().getDrawable(R.drawable.photo_default));}viewHolder.tvName.setText(contactsModel.getName());return view;}final static class ViewHolder {LinearLayout tvTitleLayout;TextView tvLetter;ImageView tvPhoto;TextView tvName;}/*** 根据ListView的当前位置获取分类的首字母的Char ascii值*/@Overridepublic int getSectionForPosition(int position) {return list.get(position).getSortLetter().charAt(0);}/*** 根据分类的首字母的Char ascii值获取其第一次出现该首字母的位置*/@Overridepublic int getPositionForSection(int section) {for (int i = 0; i < getCount(); i++) {String sortStr = list.get(i).getSortLetter();char firstChar = sortStr.toUpperCase().charAt(0);if (firstChar == section) {return i;}}return -1;}@Overridepublic Object[] getSections() {return null;}
}

5. ContactsFragment：通讯录主类。这里只是将好友列表的排序和显示的代码贴出来。filledData将好友列表数据填充到ContactsModel列表中，并且根据sortPinyin进行排序。

public class ContactsFragment extends ListFragment implements HttpCallBackListener{private SideBar mSideBar;private TextView mLetter;private ContactsAdapter mAdapter;private FriendList mFriendList;private String mFriendId;/*** 汉字转换成拼音的类*/private CharacterParser mCharacterParser;private List<ContactsModel> mSourceDateList;/*** 根据拼音来排列ListView里面的数据类*/private PinyinComparator mPinyinComparator;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);mSourceDateList = new ArrayList<ContactsModel>();// 实例化汉字转拼音类mCharacterParser = CharacterParser.getInstance();mPinyinComparator = new PinyinComparator();}@Overridepublic void onActivityCreated(Bundle savedInstanceState) {super.onActivityCreated(savedInstanceState);setListener();// 获取好友列表mFriendList = DataUtils.GetFriendList();// 设置好友列表数据mSourceDateList = filledData(mFriendList);mAdapter = new ContactsAdapter(mContext, mSourceDateList);setListAdapter(mAdapter);}private void setListener(){//设置显示字母的TextViewmSideBar.setTextView(mLetter);// 设置右侧触摸监听mSideBar.setOnTouchingLetterChangedListener(new OnTouchingLetterChangedListener() {@Overridepublic void onTouchingLetterChanged(String s) {// 该字母首次出现的位置int position = mAdapter.getPositionForSection(s.charAt(0));if (position != -1) {mFriendListView.setSelection(position);}}});}/*** 为ListView填充数据<BR/>* 已经根据首字母排序*/private List<ContactsModel> filledData(FriendList friendList){List<ContactsModel> mSortList = new ArrayList<ContactsModel>();List<User> friends = friendList.getFriends();if(friends == null)return mSortList;for(int i=0; i<friends.size(); i++){ContactsModel contactsModel = new ContactsModel();User user = friends.get(i);contactsModel.setPhoto(user.getPhoto());contactsModel.setName(user.getName());contactsModel.setGender(user.getGender());contactsModel.setUserId(user.getUserId());//将昵称首字转换成拼音String pinyin = mCharacterParser.getSelling(user.getName().substring(0, 1));String sortLetter = pinyin.substring(0, 1).toUpperCase();//拼音首字母，用于显示String sortPinyin = pinyin.toUpperCase();//拼音，用于排序// 正则表达式，判断首字母是否是英文字母if(sortLetter.matches("[A-Z]")){contactsModel.setSortLetter(sortLetter);contactsModel.setSortPinyin(sortPinyin);}else{contactsModel.setSortLetter("#");contactsModel.setSortPinyin("#");}mSortList.add(contactsModel);}// 根据a-z进行排序源数据Collections.sort(mSortList, mPinyinComparator);return mSortList;}
}

参考网址：http://blog.csdn.net/xiaanming/article/details/12684155

public class ShowPhotoActivity extends Activity {private ImageView mShowPhoto;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.layout_show_photo);mShowPhoto = (ImageView) findViewById(R.id.showPhotoImage);Intent intent = getIntent();Bitmap bmp = (Bitmap) intent.getParcelableExtra(Constants.Flags.SHOW_PHOTO);if(bmp != null){mShowPhoto.setImageDrawable(new BitmapDrawable(bmp));}}@Overridepublic boolean onTouchEvent(MotionEvent event) {finish();return true;}
}

layout_show_photo.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="fill_parent"android:layout_height="fill_parent"android:background="#000000"android:gravity="center" ><ImageViewandroid:id="@+id/showPhotoImage"android:layout_width="fill_parent"android:layout_height="fill_parent"android:src="@drawable/photo_default"android:scaleType="fitCenter"/></LinearLayout>

<activityandroid:name=".view.ShowPhotoActivity"android:theme="@style/ShowPhotoStyle" android:screenOrientation="portrait">
</activity>

<!-- 头像放大显示的样式 -->
<style name="ShowPhotoStyle" parent="android:Theme.Black.NoTitleBar"><item name="android:windowAnimationStyle">@style/AnimShowPhoto</item><!-- 无标题 --><item name="android:windowNoTitle">true</item><!-- 设置全屏显示 --><item name="android:windowFullscreen">true</item><!-- 边框 --><item name="android:windowFrame">@null</item><!-- 是否浮现在activity之上 --><item name="android:windowIsFloating">false</item><!-- 半透明 --><item name="android:windowIsTranslucent">true</item><item name="android:windowBackground">@android:color/black</item><!-- 模糊 --><item name="android:backgroundDimEnabled">false</item>
</style><style name="AnimShowPhoto" parent="@android:style/Animation"><item name="android:windowEnterAnimation">@anim/show_photo_in</item><item name="android:windowExitAnimation">@anim/show_photo_out</item>
</style>

<?xml version="1.0" encoding="utf-8"?>
<!-- 左上角扩大--><scale   xmlns:android="http://schemas.android.com/apk/res/android"android:interpolator="@android:anim/accelerate_decelerate_interpolator"  android:fromXScale="0.001" android:toXScale="1.0"   android:fromYScale="0.001"   android:toYScale="1.0"   android:pivotX="15%"  android:pivotY="25%"  android:duration="200" />

<?xml version="1.0" encoding="utf-8"?>
<!-- 左上角缩小 --><scale   xmlns:android="http://schemas.android.com/apk/res/android"android:interpolator="@android:anim/accelerate_decelerate_interpolator"  android:fromXScale="1.0"   android:toXScale="0.001"   android:fromYScale="1.0"   android:toYScale="0.001"   android:pivotX="15%"  android:pivotY="25%"  android:duration="200" /> 

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