Android手机联系人带字母索引的快速查找

package net.loonggg.test;  import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.List; import java.util.TreeSet;  import android.os.Bundle; import android.app.Activity; import android.graphics.Color; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.view.Window; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import android.widget.LinearLayout.LayoutParams;  public class MainActivity extends Activity {   private HashMap<String, Integer> selector;// 存放含有索引字母的位置   private LinearLayout layoutIndex;   private ListView listView;   private TextView tv_show;   private ListViewAdapter adapter;   private String[] indexStr = { "#", "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 List<Person> persons = null;   private List<Person> newPersons = new ArrayList<Person>();   private int height;// 字体高度   private boolean flag = false;    @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     // 去标题栏     requestWindowFeature(Window.FEATURE_NO_TITLE);     setContentView(R.layout.activity_main);     layoutIndex = (LinearLayout) this.findViewById(R.id.layout);     layoutIndex.setBackgroundColor(Color.parseColor("#00ffffff"));     listView = (ListView) findViewById(R.id.listView);     tv_show = (TextView) findViewById(R.id.tv);     tv_show.setVisibility(View.GONE);     setData();     String[] allNames = sortIndex(persons);     sortList(allNames);      selector = new HashMap<String, Integer>();     for (int j = 0; j < indexStr.length; j++) {// 循环字母表，找出newPersons中对应字母的位置       for (int i = 0; i < newPersons.size(); i++) {         if (newPersons.get(i).getName().equals(indexStr[j])) {           selector.put(indexStr[j], i);         }       }      }     adapter = new ListViewAdapter(this, newPersons);     listView.setAdapter(adapter);   }    /**    * 重新排序获得一个新的List集合    *    * @param allNames    */   private void sortList(String[] allNames) {     for (int i = 0; i < allNames.length; i++) {       if (allNames[i].length() != 1) {         for (int j = 0; j < persons.size(); j++) {           if (allNames[i].equals(persons.get(j).getPinYinName())) {             Person p = new Person(persons.get(j).getName(), persons                 .get(j).getPinYinName());             newPersons.add(p);           }         }       } else {         newPersons.add(new Person(allNames[i]));       }     }   }    @Override   public void onWindowFocusChanged(boolean hasFocus) {     // 在oncreate里面执行下面的代码没反应，因为oncreate里面得到的getHeight=0     if (!flag) {// 这里为什么要设置个flag进行标记，我这里不先告诉你们，请读者研究，因为这对你们以后的开发有好处       height = layoutIndex.getMeasuredHeight() / indexStr.length;       getIndexView();       flag = true;     }   }    /**    * 获取排序后的新数据    *    * @param persons    * @return    */   public String[] sortIndex(List<Person> persons) {     TreeSet<String> set = new TreeSet<String>();     // 获取初始化数据源中的首字母，添加到set中     for (Person person : persons) {       set.add(StringHelper.getPinYinHeadChar(person.getName()).substring(           0, 1));     }     // 新数组的长度为原数据加上set的大小     String[] names = new String[persons.size() + set.size()];     int i = 0;     for (String string : set) {       names[i] = string;       i++;     }     String[] pinYinNames = new String[persons.size()];     for (int j = 0; j < persons.size(); j++) {       persons.get(j).setPinYinName(           StringHelper               .getPingYin(persons.get(j).getName().toString()));       pinYinNames[j] = StringHelper.getPingYin(persons.get(j).getName()           .toString());     }     // 将原数据拷贝到新数据中     System.arraycopy(pinYinNames, 0, names, set.size(), pinYinNames.length);     // 自动按照首字母排序     Arrays.sort(names, String.CASE_INSENSITIVE_ORDER);     return names;   }    /**    * 绘制索引列表    */   public void getIndexView() {     LinearLayout.LayoutParams params = new LayoutParams(         LayoutParams.WRAP_CONTENT, height);     for (int i = 0; i < indexStr.length; i++) {       final TextView tv = new TextView(this);       tv.setLayoutParams(params);       tv.setText(indexStr[i]);       tv.setPadding(10, 0, 10, 0);       layoutIndex.addView(tv);       layoutIndex.setOnTouchListener(new OnTouchListener() {          @Override         public boolean onTouch(View v, MotionEvent event)          {           float y = event.getY();           int index = (int) (y / height);           if (index > -1 && index < indexStr.length) {// 防止越界             String key = indexStr[index];             if (selector.containsKey(key)) {               int pos = selector.get(key);               if (listView.getHeaderViewsCount() > 0) {// 防止ListView有标题栏，本例中没有。                 listView.setSelectionFromTop(                     pos + listView.getHeaderViewsCount(), 0);               } else {                 listView.setSelectionFromTop(pos, 0);// 滑动到第一项               }               tv_show.setVisibility(View.VISIBLE);               tv_show.setText(indexStr[index]);             }           }           switch (event.getAction()) {           case MotionEvent.ACTION_DOWN:             layoutIndex.setBackgroundColor(Color                 .parseColor("#606060"));             break;            case MotionEvent.ACTION_MOVE:              break;           case MotionEvent.ACTION_UP:             layoutIndex.setBackgroundColor(Color                 .parseColor("#00ffffff"));             tv_show.setVisibility(View.GONE);             break;           }           return true;         }       });     }   }    /**    * 设置模拟数据    */   private void setData() {     persons = new ArrayList<Person>();     Person p1 = new Person("耿琦");     persons.add(p1);     Person p2 = new Person("王宝强");     persons.add(p2);     Person p3 = new Person("柳岩");     persons.add(p3);     Person p4 = new Person("文章");     persons.add(p4);     Person p5 = new Person("马伊");     persons.add(p5);     Person p6 = new Person("李晨");     persons.add(p6);     Person p7 = new Person("张馨予");     persons.add(p7);     Person p8 = new Person("韩红");     persons.add(p8);     Person p9 = new Person("韩寒");     persons.add(p9);     Person p10 = new Person("丹丹");     persons.add(p10);     Person p11 = new Person("丹凤眼");     persons.add(p11);     Person p12 = new Person("哈哈");     persons.add(p12);     Person p13 = new Person("萌萌");     persons.add(p13);     Person p14 = new Person("蒙混");     persons.add(p14);     Person p15 = new Person("烟花");     persons.add(p15);     Person p16 = new Person("眼黑");     persons.add(p16);     Person p17 = new Person("许三多");     persons.add(p17);     Person p18 = new Person("程咬金");     persons.add(p18);     Person p19 = new Person("程哈哈");     persons.add(p19);     Person p20 = new Person("爱死你");     persons.add(p20);     Person p21 = new Person("阿莱");     persons.add(p21);    }  }

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:layout_width="fill_parent"   android:layout_height="match_parent"   android:background="#ffffff"   android:orientation="vertical" >    <TextView     android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:padding="10dp"     android:text="列表显示"     android:textColor="#000000"     android:textSize="16sp" />    <FrameLayout     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="#ffffff" >      <ListView       android:id="@+id/listView"       android:layout_width="match_parent"       android:layout_height="wrap_content"       android:cacheColorHint="#00000000"       android:fadingEdge="none"       android:scrollbars="none" >     </ListView>      <TextView       android:id="@+id/tv"       android:layout_width="60dp"       android:layout_height="60dp"       android:layout_gravity="center"       android:background="#f0606060"       android:gravity="center"       android:text="A"       android:textColor="#ffffff"       android:textSize="30sp" />      <LinearLayout       android:id="@+id/layout"       android:layout_width="wrap_content"       android:layout_height="fill_parent"       android:layout_gravity="right"       android:background="#d7d7d7"       android:gravity="center"       android:orientation="vertical" >     </LinearLayout>   </FrameLayout>  </LinearLayout> 

package net.loonggg.test;  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 ListViewAdapter extends BaseAdapter {   private Context context;   private List<Person> list;   private ViewHolder viewHolder;    public ListViewAdapter(Context context, List<Person> list) {     this.context = context;     this.list = list;   }    @Override   public int getCount() {     return list.size();   }    @Override   public Object getItem(int position) {     return list.get(position);   }    @Override   public long getItemId(int position) {     return position;   }    @Override   public boolean isEnabled(int position) {     // TODO Auto-generated method stub     if (list.get(position).getName().length() == 1)// 如果是字母索引       return false;// 表示不能点击     return super.isEnabled(position);   }    @Override   public View getView(int position, View convertView, ViewGroup parent) {     String item = list.get(position).getName();     viewHolder = new ViewHolder();     if (item.length() == 1) {       convertView = LayoutInflater.from(context).inflate(R.layout.index,           null);       viewHolder.indexTv = (TextView) convertView           .findViewById(R.id.indexTv);     } else {       convertView = LayoutInflater.from(context).inflate(R.layout.item,           null);       viewHolder.itemTv = (TextView) convertView           .findViewById(R.id.itemTv);     }     if (item.length() == 1) {       viewHolder.indexTv.setText(list.get(position).getName());     } else {       viewHolder.itemTv.setText(list.get(position).getName());     }     return convertView;   }    private class ViewHolder {     private TextView indexTv;     private TextView itemTv;   }  } 

<?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="wrap_content"   android:background="#9c9c9c"   android:orientation="vertical"   android:paddingBottom="5dp"   android:paddingLeft="10dp"   android:paddingTop="5dp" >    <TextView     android:id="@+id/indexTv"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:textColor="#0f0f0f" />  </LinearLayout> 

<?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="wrap_content"   android:background="#ffffff"   android:orientation="vertical"   android:paddingBottom="5dp"   android:paddingLeft="20dp"   android:paddingTop="5dp" >    <TextView     android:id="@+id/itemTv"     android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:textColor="#000000"     android:textSize="20sp" />  </LinearLayout> 

package net.loonggg.test;  public class Person {   private String name;   private String pinYinName;    public Person(String name) {     super();     this.name = name;   }    public Person(String name, String pinYinName) {     super();     this.name = name;     this.pinYinName = pinYinName;   }    public String getName() {     return name;   }    public void setName(String name) {     this.name = name;   }    public String getPinYinName() {     return pinYinName;   }    public void setPinYinName(String pinYinName) {     this.pinYinName = pinYinName;   }  } 

package net.loonggg.test;  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;  public class StringHelper {   /**    * 得到 全拼    *    * @param src    * @return    */   public static String getPingYin(String src) {     char[] t1 = null;     t1 = src.toCharArray();     String[] t2 = new String[t1.length];     HanyuPinyinOutputFormat t3 = new HanyuPinyinOutputFormat();     t3.setCaseType(HanyuPinyinCaseType.LOWERCASE);     t3.setToneType(HanyuPinyinToneType.WITHOUT_TONE);     t3.setVCharType(HanyuPinyinVCharType.WITH_V);     String t4 = "";     int t0 = t1.length;     try {       for (int i = 0; i < t0; i++) {         // 判断是否为汉字字符         if (java.lang.Character.toString(t1[i]).matches(             "[//u4E00-//u9FA5]+")) {           t2 = PinyinHelper.toHanyuPinyinStringArray(t1[i], t3);           t4 += t2[0];         } else {           t4 += java.lang.Character.toString(t1[i]);         }       }       return t4;     } catch (BadHanyuPinyinOutputFormatCombination e1) {       e1.printStackTrace();     }     return t4;   }    /**    * 得到首字母    *    * @param str    * @return    */   public static String getHeadChar(String str) {      String convert = "";     char word = str.charAt(0);     String[] pinyinArray = PinyinHelper.toHanyuPinyinStringArray(word);     if (pinyinArray != null) {       convert += pinyinArray[0].charAt(0);     } else {       convert += word;     }     return convert.toUpperCase();   }      /**    * 得到中文首字母缩写    *    * @param str    * @return    */   public static String getPinYinHeadChar(String str) {      String convert = "";     for (int j = 0; j < str.length(); j++) {       char word = str.charAt(j);       String[] pinyinArray = PinyinHelper.toHanyuPinyinStringArray(word);       if (pinyinArray != null) {         convert += pinyinArray[0].charAt(0);       } else {         convert += word;       }     }     return convert.toUpperCase();   } }