喜歡另辟蹊徑的我，在這里廢話不多說了，直接上代碼和圖片了。
效果圖如下：
第一步：MainActivity的代碼如下：
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;// 字體高度 private boolean flag = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // 去標題欄 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++) {// 循環字母表，找出newPersons中對應字母的位置 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); } /** * 重新排序獲得一個新的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里面執行下面的代碼沒反應，因為oncreate里面得到的getHeight=0 if (!flag) {// 這里為什么要設置個flag進行標記，我這里不先告訴你們，請讀者研究，因為這對你們以后的開發有好處 height = layoutIndex.getMeasuredHeight() / indexStr.length; getIndexView(); flag = true; } } /** * 獲取排序后的新數據 * * @param persons * @return */ public String[] sortIndex(List<Person> persons) { TreeSet<String> set = new TreeSet<String>(); // 獲取初始化數據源中的首字母，添加到set中 for (Person person : persons) { set.add(StringHelper.getPinYinHeadChar(person.getName()).substring( 0, 1)); } // 新數組的長度為原數據加上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()); } // 將原數據拷貝到新數據中 System.arraycopy(pinYinNames, 0, names, set.size(), pinYinNames.length); // 自動按照首字母排序 Arrays.sort(names, String.CASE_INSENSITIVE_ORDER); return names; } /** * 繪制索引列表 */ 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有標題欄，本例中沒有。 listView.setSelectionFromTop( pos + listView.getHeaderViewsCount(), 0); } else { listView.setSelectionFromTop(pos, 0);// 滑動到第一項 } 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; } }); } } /** * 設置模擬數據 */ private void setData() { persons = new ArrayList<Person>(); Person p1 = new Person("耿琦"); persons.add(p1); Person p2 = new Person("王寶強"); persons.add(p2); Person p3 = new Person("柳巖"); persons.add(p3); Person p4 = new Person("文章"); persons.add(p4); Person p5 = new Person("馬伊
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