Android实现仿通讯录侧边栏滑动SiderBar效果代码

package com.freesonfish.listview_index; 
import android.content.Context; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.util.AttributeSet; 
import android.view.MotionEvent; 
import android.view.View; 
public class MySideBar extends View { 
  private OnTouchingLetterChangedListener touchListener; 
  // 26个字母 
  public static String[] b = { "#", "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 boolean showBkg = false; 
  int choose = -1; 
  int scrollChoose = -1; 
  Paint paint = new Paint(); 
  Paint rectPaint = new Paint(); 
  float rectWidth = 0f; 
  public MySideBar(Context context, AttributeSet attrs, int defStyle) { 
    super(context, attrs, defStyle); 
    init(); 
  } 
  public MySideBar(Context context, AttributeSet attrs) { 
    super(context, attrs); 
    init(); 
  } 
  public MySideBar(Context context) { 
    super(context); 
    init(); 
  } 
  private void init() { 
    rectPaint.setColor(Color.parseColor("#CCCCCC")); 
    rectWidth = paint.measureText("#"); 
  } 
  /** 
   * 重写这个方法 
   */ 
  protected void onDraw(Canvas canvas) { 
    super.onDraw(canvas); 
    if (showBkg) { 
      canvas.drawColor(Color.parseColor("#CCCCCC")); 
    } 
    final int height = getHeight(); 
    final int width = getWidth(); 
    final int singleHeight = height / b.length; 
    final float xRectPos = ((float) width - paint.measureText("#")) / 2.0f - rectWidth; 
    final float xRectPos2 = xRectPos + 3.0f * rectWidth; 
    for (int i = 0; i  0 && c 

package com.freesonfish.listview_index; 
import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 
public class ListContantsUtil { 
  static final List indexPositiOnList= new ArrayList(); 
  static final List AbcList = new ArrayList(); 
  static final HashMap indexPositiOnMap= new HashMap(); 
  static void putNameIndexToMap(List list, HashMap nameAndPinyin) { 
    int lenght = list.size(); 
    for (int i = 0; i = 65 && ascii <= 90) { 
        if (!indexPositionMap.containsKey(name)) { 
          indexPositionMap.put(name, i); 
          AbcList.add(name); 
          indexPositionList.add(i); 
        } 
      } else { 
        if (!indexPositionMap.containsKey("#")) { 
          indexPositionMap.put("#", i); 
          AbcList.add("#"); 
          indexPositionList.add(i); 
        } 
      } 
    } 
  } 
}