Android手机联系人快速索引(手机通讯录)

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;
/**
 * 这里是主布局
 * @author lxd
 *
 */
public class MainActivity extends Activity {
 private ListView lv_main;
 private FriendAdapter adapter;
 private List<Friend> data = new ArrayList<Friend>();
 private QuickIndexView qiv_main;
 private TextView tv_main_word;
 private Handler handler = new Handler(){
  public void handleMessage(android.os.Message msg) {
   //隐藏word
   tv_main_word.setVisibility(View.GONE);
  }
 };
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  lv_main = (ListView) findViewById(R.id.lv_main);
  qiv_main = (QuickIndexView) findViewById(R.id.qiv_main);
  tv_main_word = (TextView) findViewById(R.id.tv_main_word);
  //设置监听
  qiv_main.setOnIndexChangedListener(new QuickIndexView.OnIndexChangedListener() {
   @Override
   public void onIndexChanged(String word) {
    tv_main_word.setText(word);
    tv_main_word.setVisibility(View.VISIBLE);
    //handler.removeMessages(1);
    //移除未处理的消息
    handler.removeCallbacksAndMessages(null);
    //发延迟消息
    handler.sendEmptyMessageDelayed(1, 2000);
    //滑动listview
    //查找对应的item
    for(int i=0;i<data.size();i++) {
     String fWord = data.get(i).getPinyin().substring(0, 1);
     if(word.equals(fWord)) {
      lv_main.setSelection(i);
      return;
     }
    }
   }
   @Override
   public void onUp() {
    //tv_main_word.setVisibility(View.GONE);
   }
  });
  //显示列表
  adapter = new FriendAdapter();
  initData();
  lv_main.setAdapter(adapter);
  //lv_main.setSelection(5);
 }
 private void initData() {
  data.add(new Friend("张三"));
  data.add(new Friend("杨九"));
  data.add(new Friend("胡继群"));
  data.add(new Friend("刘畅"));
  data.add(new Friend("钟泽兴"));
  data.add(new Friend("尹革新"));
  data.add(new Friend("安传鑫"));
  data.add(new Friend("张骞壬"));
  data.add(new Friend("温松"));
  data.add(new Friend("李凤秋"));
  data.add(new Friend("刘甫"));
  data.add(new Friend("娄全超"));
  data.add(new Friend("张猛"));
  data.add(new Friend("王英杰"));
  data.add(new Friend("李振南"));
  data.add(new Friend("孙仁政"));
  data.add(new Friend("唐春雷"));
  data.add(new Friend("牛鹏伟"));
  data.add(new Friend("姜宇航"));
  data.add(new Friend("刘挺"));
  data.add(new Friend("张洪瑞"));
  data.add(new Friend("张建忠"));
  data.add(new Friend("侯亚帅"));
  data.add(new Friend("刘帅"));
  data.add(new Friend("乔竞飞"));
  data.add(new Friend("徐雨健"));
  data.add(new Friend("吴亮"));
  data.add(new Friend("王兆霖"));
  data.add(new Friend("阿三"));
  Collections.sort(data);
 }
 class FriendAdapter extends BaseAdapter {
  @Override
  public int getCount() {
   return data.size();
  }
  @Override
  public Object getItem(int position) {
   return data.get(position);
  }
  @Override
  public long getItemId(int position) {
   return 0;
  }
  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
   ViewHolder holder = null;
   if(convertView==null) {
    holder = new ViewHolder();
    convertView = View.inflate(MainActivity.this, R.layout.item_main, null);
    holder.wordTV = (TextView) convertView.findViewById(R.id.tv_item_word);
    holder.nameTV = (TextView) convertView.findViewById(R.id.tv_item_name);
    convertView.setTag(holder);//***********?
   } else {
    holder = (ViewHolder) convertView.getTag();
   }
   Friend friend = data.get(position);
   String word = friend.getPinyin().substring(0, 1);
   holder.wordTV.setText(word);
   holder.nameTV.setText(friend.getName());
   //下标为0的显示
   if(position==0) {
    holder.wordTV.setVisibility(View.VISIBLE);
   } else {
    //取出上一个friend, 并得到的第一个word
    String preWord = data.get(position-1).getPinyin().substring(0, 1);
    //判断是否于当前行的word是否相同
     //如果相同, 隐藏
    if(word.equals(preWord)) {
     holder.wordTV.setVisibility(View.GONE);
    } else {
     //如果不同, 显示
     holder.wordTV.setVisibility(View.VISIBLE);
    }
   }
   return convertView;
  }
  class ViewHolder {
   public TextView wordTV;
   public TextView nameTV;
  }
 }
}

<RelativeLayout 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"
 tools:context="${relativePackage}.${activityClass}" >
 <ListView
  android:id="@+id/lv_main"
  android:layout_width="match_parent"
  android:layout_height="match_parent" >
 </ListView>
 <!-- com.atguigu.quickindex.QuickIndexView -->
 <com.atguigu.quickindex.QuickIndexView
  android:id="@+id/qiv_main"
  android:layout_width="40dp"
  android:layout_height="match_parent"
  android:layout_alignParentRight="true"
  android:background="#ffffff" >
 </com.atguigu.quickindex.QuickIndexView>
 <TextView
  android:id="@+id/tv_main_word"
  android:layout_width="100dp"
  android:layout_height="100dp"
  android:layout_centerHorizontal="true"
  android:layout_centerVertical="true"
  android:background="#66666666"
  android:text="A" 
  android:textSize="40sp"
  android:gravity="center"
  android:visibility="gone"/>
</RelativeLayout>

<?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="wrap_content"
 android:orientation="vertical" >
 <TextView
  android:id="@+id/tv_item_word"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="A" 
  android:background="#66666666"
  android:textSize="18sp"
  android:padding="5dp"/>
 <TextView
  android:id="@+id/tv_item_name"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content"
  android:text="某人" 
  android:textSize="18sp"
  android:padding="5dp"/>
</LinearLayout>

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
/**
 * 这里是自定义View
 * @author lxd
 *
 */
public class QuickIndexView extends View {
 private float itemWidth;
 private float itemHeight;
 // private float wordWidth;
 // private float wordHeight;
 private String[] indexArr = { "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 Paint paint;
 public QuickIndexView(Context context, AttributeSet attrs) {
  super(context, attrs);
  paint = new Paint();
  paint.setColor(Color.WHITE);
  paint.setTextSize(16);
  paint.setAntiAlias(true);
 }
 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);
  itemWidth = this.getMeasuredWidth();
  itemHeight = this.getMeasuredHeight() / 26f;
 }
 @Override
 protected void onDraw(Canvas canvas) {
  //当每次触发重绘的时候，就把26个字母循环一遍
  for (int i = 0; i < indexArr.length; i++) {
   String word = indexArr[i];
   // 设置文字的颜色
   if (i == touchIndex) {
    //这里设置被点击的字母变化：颜色变灰色、字体变25sp
    paint.setColor(Color.GRAY);
    paint.setTextSize(25);
   } else {
    //其他没被点击的字母，保持原有状态：设置颜色、字体大小为18sp
    paint.setColor(Color.BLACK);
    paint.setTextSize(18);
   }
   // 得到word的宽高
   Rect bounds = new Rect();
   paint.getTextBounds(word, 0, word.length(), bounds);
   //得到字体的宽
   int wordWidth = bounds.width();
   //得到字体的高
   int wordHeight = bounds.height();
   // 计算word的左上角的坐标：字母所在的X坐标、Y坐标
   float x = itemWidth / 2 - wordWidth / 2;
   float y = itemHeight / 2 + wordHeight / 2 + i * itemHeight;
   // 绘制word
   canvas.drawText(word, x, y, paint);
  }
 }
 // ///////////////////////////////////////////////////////////////////////
 private int touchIndex = -1;// 触摸的字母的下标
 @Override
 public boolean onTouchEvent(MotionEvent event) {
  // 得到事件坐标
  float eventY = event.getY();
  switch (event.getAction()) {
  case MotionEvent.ACTION_DOWN:
  case MotionEvent.ACTION_MOVE:
   // 计算下标
   int index = (int) (eventY / itemHeight);
   if (index > 25) {
    index = 25;
   }
   if (index < 0) {
    index = 0;
   }
   // 如果下标有改变, 强制重绘
   if (index != touchIndex) {
    // 更新touchIndex
    touchIndex = index;
    // 强制重绘
    invalidate();
    // 通知Activity更新TextView
    if (onIndexChangedListener != null) {
     onIndexChangedListener.onIndexChanged(indexArr[index]);
    }
   }
   break;
  case MotionEvent.ACTION_UP:
   touchIndex = -1;
   // 强制重绘
   invalidate();
   // 通知Activity更新TextView
   if (onIndexChangedListener != null) {
    onIndexChangedListener.onUp();
   }
   break;
  default:
   break;
  }
  return true;// 所有的事件都由当前视图消费
 }
 private OnIndexChangedListener onIndexChangedListener;
 /*
  * 设置监听对象的方法 这个方法一般是Activity调用
  */
 public void setOnIndexChangedListener(
   OnIndexChangedListener onIndexChangedListener) {
  this.onIndexChangedListener = onIndexChangedListener;
 }
 interface OnIndexChangedListener {
  // 当操作的下标改变时自动调用
  public void onIndexChanged(String word);
  // 当up时调用
  public void onUp();
 }
}

/**
 * 联系人类
 * @author lxd
 *
 */
public class Friend implements Comparable<Friend> {
 private String name;
 private String pinyin;
 public Friend(String name) {
  super();
  this.name = name;
  pinyin = PinYinUtils.getPinYin(name);
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public String getPinyin() {
  return pinyin;
 }
 public void setPinyin(String pinyin) {
  this.pinyin = pinyin;
 }
 @Override
 public String toString() {
  return "Friend [name=" + name + ", pinyin=" + pinyin + "]";
 }
 @Override
 public int compareTo(Friend another) {
  return this.pinyin.compareTo(another.getPinyin());
 }
}

/**
 * 将汉字转换为拼音
 * @author lxd
 *
 */
public class PinYinUtils {
 /**
  * 得到指定汉字的拼音
  * 注意:不应该被频繁调用，它消耗一定内存
  * @param hanzi
  * @return
  */
 public static String getPinYin(String hanzi){
  String pinyin = "";
  HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();//控制转换是否大小写，是否带音标
  format.setCaseType(HanyuPinyinCaseType.UPPERCASE);//大写
  format.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
  //由于不能直接对多个汉字转换，只能对单个汉字转换
  char[] arr = hanzi.toCharArray();
  for (int i = 0; i < arr.length; i++) {
   if(Character.isWhitespace(arr[i]))continue;//如果是空格，则不处理，进行下次遍历
   //汉字是2个字节存储，肯定大于127，所以大于127就可以当为汉字转换
   if(arr[i]>127){
    try {
     //由于多音字的存在，单 dan shan
     String[] pinyinArr = PinyinHelper.toHanyuPinyinStringArray(arr[i], format);
     if(pinyinArr!=null){
      pinyin += pinyinArr[0];
     }else {
      pinyin += arr[i];
     }
    } catch (BadHanyuPinyinOutputFormatCombination e) {
     e.printStackTrace();
     //不是正确的汉字
     pinyin += arr[i];
    }
   }else {
    //不是汉字，
    pinyin += arr[i];
   }
  }
  return pinyin;
 }
}