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; }}