喜欢另辟蹊径的我，在这里废话不多说了，直接上代码和图片了。
效果图如下：
第一步：MainActivity的代码如下：
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("马伊琍"); 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); } }
此Activity的布局文件如下：
<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>
第二步：自定义了一个Adapter，代码如下：
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; } }
第三步：用到的ListView中的子布局文件如下：
1、index.xml布局文件代码如下：
<?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>
2、item.xml布局文件代码如下：
<?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>
第四步：用到的实体类及工具类如下：
1、Person.java代码如下：
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; } }
2、工具类代码如下：
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(); } }
到这里就完事，非常简单吧！