PinyinUtils.java


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 (char curchar : input) {
    if (java.lang.Character.toString(curchar).matches("[\\u4E00-\\u9FA5]+")) {
     String[] temp = PinyinHelper.toHanyuPinyinStringArray(curchar, format);
     output += temp[0];
    } else
     output += java.lang.Character.toString(curchar);
   }
  } catch (BadHanyuPinyinOutputFormatCombination e) {
   e.printStackTrace();
  }
  return output;
 }

private int sort(PersonBean lhs, PersonBean rhs) {
  // 获取ascii值
  int lhs_ascii = lhs.getFirstPinYin().toUpperCase().charAt(0);
  int rhs_ascii = rhs.getFirstPinYin().toUpperCase().charAt(0);
  // 判断若不是字母，则排在字母之后
  if (lhs_ascii < 65 || lhs_ascii > 90)
   return 1;
  else if (rhs_ascii < 65 || rhs_ascii > 90)
   return -1;
  else
   return lhs.getPinYin().compareTo(rhs.getPinYin());
 }

<?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" >
 <!-- 这个TextView就是显示字母的 -->
 <TextView
  android:id="@+id/tv_lv_item_tag"
  android:layout_width="match_parent"
  android:layout_height="20dp"
  android:background="#e6e6e6"
  android:gravity="center_vertical"
  android:paddingLeft="10dip"
  android:text="Z"
  android:visibility="visible" />
 <RelativeLayout
  android:layout_width="match_parent"
  android:layout_height="wrap_content" >
  <View 
   android:id="@+id/view_lv_item_line"
   android:layout_width="match_parent"
   android:layout_height="0.5dip"
   android:background="#174465"
   android:layout_marginLeft="10dip"
   android:layout_marginRight="20dip"
   />
  <ImageView
   android:id="@+id/iv_lv_item_head"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:src="@drawable/ic_launcher"
   android:layout_below="@id/view_lv_item_line"
   android:layout_marginLeft="5dp" />
  <TextView 
   android:id="@+id/tv_lv_item_name"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:layout_centerVertical="true"
   android:layout_toRightOf="@id/iv_lv_item_head"
   android:layout_marginLeft="5dip"
   android:text="周华健"/>
 </RelativeLayout>
</LinearLayout>

package com.suse.contact;
import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.Typeface; 
import android.graphics.drawable.ColorDrawable; 
import android.util.AttributeSet; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.TextView;
public class SideBar extends View {
 // 触摸事件 
 private OnTouchingLetterChangedListener onTouchingLetterChangedListener; 
 // 26个字母 
 public static String[] A_Z = { "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 int choose = -1;// 选中 
 private Paint paint = new Paint(); 
 private TextView mTextDialog; 
 /** 
  * 为SideBar设置显示字母的TextView 
  * @param mTextDialog 
  */ 
 public void setTextView(TextView mTextDialog) { 
  this.mTextDialog = mTextDialog; 
 } 
 public SideBar(Context context, AttributeSet attrs, int defStyle) { 
  super(context, attrs, defStyle); 
 } 
 public SideBar(Context context, AttributeSet attrs) { 
  super(context, attrs); 
 } 
 public SideBar(Context context) { 
  super(context); 
 } 
 /** 
  * 重写这个方法 
  */ 
 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 / A_Z.length-2;// 获取每一个字母的高度 (这里-2仅仅是为了好看而已)
  for (int i = 0; i < A_Z.length; i++) { 
   paint.setColor(Color.rgb(33, 65, 98)); //设置字体颜色 
   paint.setTypeface(Typeface.DEFAULT_BOLD); //设置字体
   paint.setAntiAlias(true); //设置抗锯齿
   paint.setTextSize(30); //设置字母字体大小
   // 选中的状态 
   if (i == choose) { 
    paint.setColor(Color.parseColor("#3399ff")); //选中的字母改变颜色
    paint.setFakeBoldText(true); //设置字体为粗体
   } 
   // x坐标等于中间-字符串宽度的一半. 
   float xPos = width / 2 - paint.measureText(A_Z[i]) / 2; 
   float yPos = singleHeight * i + singleHeight; 
   canvas.drawText(A_Z[i], xPos, yPos, paint); //绘制所有的字母
   paint.reset();// 重置画笔 
  } 
 } 
 @Override 
 public boolean dispatchTouchEvent(MotionEvent event) { 
  final int action = event.getAction(); 
  final float y = event.getY();// 点击y坐标 
  final int oldChoose = choose; 
  final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener; 
  final int c = (int) (y / getHeight() * A_Z.length);// 点击y坐标所占总高度的比例*b数组的长度就等于点击b中的个数. 
  switch (action) { 
  case MotionEvent.ACTION_UP: 
   setBackgroundDrawable(new ColorDrawable(0x00000000)); 
   choose = -1;// 
   invalidate(); 
   if (mTextDialog != null) { 
    mTextDialog.setVisibility(View.INVISIBLE); 
   } 
   break; 
  default: 
   setBackgroundResource(R.drawable.sidebar_background); 
   if (oldChoose != c) { //判断选中字母是否发生改变
    if (c >= 0 && c < A_Z.length) { 
     if (listener != null) { 
      listener.onTouchingLetterChanged(A_Z[c]); 
     } 
     if (mTextDialog != null) { 
      mTextDialog.setText(A_Z[c]); 
      mTextDialog.setVisibility(View.VISIBLE); 
     } 
     choose = c; 
     invalidate(); 
    } 
   } 
   break; 
  } 
  return true; 
 } 
 /** 
  * 向外公开的方法 
  * 
  * @param onTouchingLetterChangedListener 
  */ 
 public void setOnTouchingLetterChangedListener( 
   OnTouchingLetterChangedListener onTouchingLetterChangedListener) { 
  this.onTouchingLetterChangedListener = onTouchingLetterChangedListener; 
 } 
 /** 
  * 接口 
  * 
  * @author coder 
  * 
  */ 
 public interface OnTouchingLetterChangedListener { 
  public void onTouchingLetterChanged(String s); 
 }
}

MainActivity.java：
package com.suse.contact;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.TextView;
import com.suse.contact.SideBar.OnTouchingLetterChangedListener;
/**
 * 
* @ClassName: MainActivity 
* @Description: TODO(这里用一句话描述这个类的作用) 
* @author 银色的流星 欢迎批评、指导、交流 QQ:962455668
 */
public class MainActivity extends Activity {
 private ListView listView;
 private SortAdapter sortadapter;
 private List<PersonBean> data;
 private SideBar sidebar;
 private TextView dialog;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  init();
 }
 private List<PersonBean> getData(String[] data) {
  List<PersonBean> listarray = new ArrayList<PersonBean>();
  for (int i = 0; i < data.length; i++) {
   String pinyin = PinyinUtils.getPingYin(data[i]);
   String Fpinyin = pinyin.substring(0, 1).toUpperCase();
   PersonBean person = new PersonBean();
   person.setName(data[i]);
   person.setPinYin(pinyin);
   // 正则表达式，判断首字母是否是英文字母
   if (Fpinyin.matches("[A-Z]")) {
    person.setFirstPinYin(Fpinyin);
   } else {
    person.setFirstPinYin("#");
   }
   listarray.add(person);
  }
  return listarray;
 }
 private void init() {
  // TODO Auto-generated method stub
  sidebar = (SideBar) findViewById(R.id.sidebar);
  listView = (ListView) findViewById(R.id.listview);
  dialog = (TextView) findViewById(R.id.dialog);
  sidebar.setTextView(dialog);
  // 设置字母导航触摸监听
  sidebar.setOnTouchingLetterChangedListener(new OnTouchingLetterChangedListener() {
   @Override
   public void onTouchingLetterChanged(String s) {
    // TODO Auto-generated method stub
    // 该字母首次出现的位置
    int position = sortadapter.getPositionForSelection(s.charAt(0));
    if (position != -1) {
     listView.setSelection(position);
    }
   }
  });
  data = getData(getResources().getStringArray(R.array.listpersons));
  // 数据在放在adapter之前需要排序
  Collections.sort(data, new PinyinComparator());
  sortadapter = new SortAdapter(this, data);
  listView.setAdapter(sortadapter);
 }
}

package com.suse.contact;
import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
public class SortAdapter extends BaseAdapter {
 private Context context;
 private List<PersonBean> persons;
 private LayoutInflater inflater;
 public SortAdapter(Context context, List<PersonBean> persons) {
  this.context = context;
  this.persons = persons;
  this.inflater = LayoutInflater.from(context);
 }
 @Override
 public int getCount() {
  // TODO Auto-generated method stub
  return persons.size();
 }
 @Override
 public Object getItem(int position) {
  // TODO Auto-generated method stub
  return persons.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) {
  ViewHolder viewholder = null;
  PersonBean person = persons.get(position);
  if (convertView == null) {
   viewholder = new ViewHolder();
   convertView = inflater.inflate(R.layout.list_item, null);
   viewholder.tv_tag = (TextView) convertView
     .findViewById(R.id.tv_lv_item_tag);
   viewholder.tv_name = (TextView) convertView
     .findViewById(R.id.tv_lv_item_name);
   convertView.setTag(viewholder);
  } else {
   viewholder = (ViewHolder) convertView.getTag();
  }
  // 获取首字母的assii值
  int selection = person.getFirstPinYin().charAt(0);
  // 通过首字母的assii值来判断是否显示字母
  int positionForSelection = getPositionForSelection(selection);
  if (position == positionForSelection) {// 相等说明需要显示字母
   viewholder.tv_tag.setVisibility(View.VISIBLE);
   viewholder.tv_tag.setText(person.getFirstPinYin());
  } else {
   viewholder.tv_tag.setVisibility(View.GONE);
  }
  viewholder.tv_name.setText(person.getName());
  return convertView;
 }
 public int getPositionForSelection(int selection) {
  for (int i = 0; i < persons.size(); i++) {
   String Fpinyin = persons.get(i).getFirstPinYin();
   char first = Fpinyin.toUpperCase().charAt(0);
   if (first == selection) {
    return i;
   }
  }
  return -1;
 }
 class ViewHolder {
  TextView tv_tag;
  TextView tv_name;
 }
}