<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" > 
 
  <ListView 
    android:id="@+id/listview" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:cacheColorHint="@android:color/transparent" > 
  </ListView> 
 
  <com.wxcontacts.www.view.QuickIndexBar 
    android:id="@+id/quickindexbar" 
    android:layout_width="30dp" 
    android:layout_height="match_parent" 
    android:layout_alignParentRight="true" 
     /> 
   
  <!-- 默認(rèn)隱藏，當(dāng)點(diǎn)擊自定義view的時(shí)候顯示 --> 
  <TextView  
    android:visibility="gone" 
    android:id="@+id/tv_hint" 
    android:gravity="center" 
    android:layout_centerInParent="true" 
    android:layout_width="60dp" 
    android:layout_height="60dp" 
    android:background="@drawable/bg_text" 
    android:text="A" 
    android:textSize="24sp"/> 
 
</RelativeLayout> 

//自定義view 
public class QuickIndexBar extends View{ 
 
  //畫(huà)筆 
  private Paint paint; 
   
  String[] lettres={"↑","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","↓"}; 
 
  //自定義view的寬高 
  private int viewHight; 
  private int viewWidth; 
  //每個(gè)文本的高度；（文本高度等于view高度除以文本個(gè)數(shù)） 
  private int cellHeight; 
 
  //文本的高度 
  private float textHeight; 
 
  private int currentIndex=-1; 
 
  public OnLetterChangeListen onLetterChangeListen; 
   
  public OnLetterChangeListen getOnLetterChangeListen(){ 
    return onLetterChangeListen; 
  } 
   
   
  public void setOnLetterChangeListener(OnLetterChangeListen onLetterChangeListen){ 
    this.onLetterChangeListen=onLetterChangeListen; 
  } 
  //自定義一個(gè)字母改變的監(jiān)聽(tīng) 
  public interface OnLetterChangeListen{ 
    void onLetterChange(String letter); 
    void onResert(); 
  } 
   
  public QuickIndexBar(Context context) { 
    this(context,null); 
  } 
  public QuickIndexBar(Context context, AttributeSet attrs) { 
    this(context, attrs,0); 
  } 
 
  public QuickIndexBar(Context context, AttributeSet attrs, int defStyle) { 
    super(context, attrs, defStyle); 
    paint=new Paint(); 
    //設(shè)置字體顏色；默認(rèn)為黑色；我們這里使用黑色 
    //paint.setColor(Color.WHITE); 
    //設(shè)置字體大小 
    paint.setTextSize(20); 
    //抗鋸齒 
    paint.setAntiAlias(true); 
    //獲取字體寬高，因?yàn)槊總€(gè)字體寬度不一樣，所以獲得寬度必須放在循環(huán)中做 
    //首先獲取字體的屬性 
    FontMetrics fontMetrics = paint.getFontMetrics(); 
    //下邊界 - 上邊界 
    textHeight = (float) Math.ceil(fontMetrics.descent-fontMetrics.ascent); 
  } 
   
  @Override 
  protected void onDraw(Canvas canvas) { 
    super.onDraw(canvas); 
    //獲取文本的寬高 
//   getTextWH(); 
    //每個(gè)文本的高度； 
    cellHeight=viewHight/lettres.length; 
     
    //通過(guò)循環(huán)把字母畫(huà)出來(lái) 
    for(int x=0;x<lettres.length;x++){ 
      String text=lettres[x]; 
       
      //paint給我們提供了一個(gè)測(cè)量字體寬度的方法 
      float textWidth = paint.measureText(text); 
      if(currentIndex==x){ 
        //當(dāng)點(diǎn)擊某個(gè)字母的時(shí)候變色 
        paint.setColor(Color.GRAY); 
      }else{ 
        paint.setColor(Color.BLACK); 
      } 
       
      /* 
       * 參數(shù)1：要畫(huà)的內(nèi)容   參數(shù)23：要畫(huà)的位置   參數(shù)4：畫(huà)筆 
       * 參數(shù)23所畫(huà)的位置指的是字母左下角坐標(biāo) 
       */ 
      canvas.drawText(text,viewWidth/2-textWidth/2,cellHeight/2+textHeight/2+cellHeight*x,paint); 
    } 
     
  } 
   
  //測(cè)量view的寬高 
  @Override 
  protected void onSizeChanged(int w, int h, int oldw, int oldh) { 
    super.onSizeChanged(w, h, oldw, oldh); 
    viewHight =getMeasuredHeight(); 
    viewWidth =getMeasuredWidth(); 
  } 
   
  @Override 
  public boolean onTouchEvent(MotionEvent event) { 
    switch (event.getAction()) { 
     
    case MotionEvent.ACTION_DOWN: 
      //計(jì)算當(dāng)前點(diǎn)擊的字母，寬度不用考慮，因?yàn)閷挾榷际且粯拥?，?jì)算高度即可，根據(jù)你點(diǎn)擊或者移動(dòng)的高度計(jì)算你當(dāng)前所點(diǎn)擊的是哪個(gè)字母 
      float downY=event.getY(); 
      currentIndex = (int)downY/cellHeight; 
      if(currentIndex<0 || currentIndex>lettres.length-1){ 
      }else{ 
        if(onLetterChangeListen!=null){ 
          onLetterChangeListen.onLetterChange(lettres[currentIndex]); 
        } 
      } 
      //重新繪制;相當(dāng)于重新調(diào)用onDraw()方法 
      invalidate(); 
      break; 
    case MotionEvent.ACTION_MOVE: 
      float moveY=event.getY(); 
      currentIndex = (int)moveY/cellHeight; 
      if(currentIndex<0 || currentIndex>lettres.length-1){ 
      }else{ 
        if(onLetterChangeListen!=null){ 
          onLetterChangeListen.onLetterChange(lettres[currentIndex]); 
        } 
      } 
      //重新繪制 
      invalidate(); 
      break; 
    case MotionEvent.ACTION_UP: 
      currentIndex=-1; 
      if(onLetterChangeListen!=null){ 
        onLetterChangeListen.onResert(); 
      } 
      break; 
 
    default: 
      break; 
    } 
    return true; 
  } 
 
} 

public class MainActivity extends Activity { 
 
  private com.wxcontacts.www.view.QuickIndexBar quickIndexBar; 
  private ListView mListView; 
  //當(dāng)點(diǎn)擊自定義view的時(shí)候屏幕中間顯示一個(gè)方塊，顯示當(dāng)前點(diǎn)擊的字母，默認(rèn)是隱藏的，當(dāng)點(diǎn)擊的時(shí)候才顯示 
  private TextView tvHint; 
   
  private List<HaoHan> hhList=new ArrayList<HaoHan>(); 
  Context context; 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    requestWindowFeature(Window.FEATURE_NO_TITLE); 
    setContentView(R.layout.activity_main); 
    tvHint=(TextView) findViewById(R.id.tv_hint); 
    context=this; 
    //listview 和 自定義view 
    mListView=(ListView) findViewById(R.id.listview); 
    quickIndexBar=(QuickIndexBar) findViewById(R.id.quickindexbar); 
     
    initHHListData(); 
     
    mListView.setAdapter(new MainListViewAdapter(context,hhList)); 
     
    //給自定義view設(shè)置自定義監(jiān)聽(tīng)，當(dāng)點(diǎn)擊到某個(gè)字母的時(shí)候彈出吐司顯示這個(gè)字母； 
    //當(dāng)點(diǎn)擊字母的時(shí)候遍歷集合，找到首字母為點(diǎn)擊字母的HaoHan的下標(biāo)，讓listview跳轉(zhuǎn)到響應(yīng)位置 
    quickIndexBar.setOnLetterChangeListener(new QuickIndexBar.OnLetterChangeListen() { 
       
      @Override 
      public void onLetterChange(String letter) { 
         
        quickIndexBar.setBackgroundResource(R.drawable.bg_text); 
         
        tvHint.setVisibility(View.VISIBLE); 
        tvHint.setText(letter); 
         
        for(int x=0;x<hhList.size();x++){ 
          if((hhList.get(x).pinyin.charAt(0)+"").equals(letter)){ 
            mListView.setSelection(x); 
            //找到第一個(gè)字母相同的直接結(jié)束，不再向下找； 
            break; 
          } 
        } 
      } 
 
      @Override 
      //當(dāng)手指彈起的時(shí)候此方法執(zhí)行 
      public void onResert() { 
        tvHint.setVisibility(View.GONE); 
        quickIndexBar.setBackgroundResource(Color.TRANSPARENT); 
      } 
    }); 
  } 
   
  //初始化集合數(shù)據(jù) 
  private void initHHListData() { 
     
    HaoHan hh; 
    for(int x=0;x<Cheeses.NAMES.length;x++){ 
      hh=new HaoHan(Cheeses.NAMES[x]); 
      hhList.add(hh); 
    } 
     
    //給集合排序 
    Collections.sort(hhList); 
     
  } 
 
}