android仿微信联系人索引列表功能

public class SlideBar extends Button{ 

 public interface OnTouchAssortListener{ 
 public void onTouchAssortListener(String s); 
 } 

 // 分类 
 private static final String[] ASSORT_TEXT = {"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 Paint mPaint = new Paint(); 
 private int mSelectIndex = -1; 
 private OnTouchAssortListener mListener = null;
 private Activity mAttachActivity;
 PopupWindow mPopupWindow = null;
 View layoutView;
 TextView text;

 public SlideBar(Context context){ 
 this(context,null); 
 } 

 public SlideBar(Context context, AttributeSet attrs) { 
 this(context, attrs,0); 
 } 

 public SlideBar(Context context, AttributeSet attrs, int defStyle){ 
 super(context, attrs, defStyle);
 mAttachActivity = (Activity)context;
 init(context);
 } 
 private void init(Context context) {
 layoutView = LayoutInflater.from(context).inflate(R.layout.alert_dialog_menu_layout, null);
 text = (TextView) layoutView.findViewById(R.id.content);
 }

 public void setOnTouchAssortListener(OnTouchAssortListener listener) {
 this.mListener = listener;
 }

 @Override 
 protected void onDraw(Canvas canvas){ 
 super.onDraw(canvas);
 int nHeight = getHeight(); 
 int hWidth = getWidth(); 
 int nAssortCount = ASSORT_TEXT.length;
 int nInterval = nHeight / nAssortCount;

 for (int i = 0; i = 0 && nIndex 

public class DataBean {

 public static final int TYPE_CHARACTER = 0;
 public static final int TYPE_DATA = 1;
 private int item_type;
 private String item_en;
 private String name;
 private String phone;
 /*其他成员*/

 public DataBean(String name,String phone,int type){
 CharacterParser parser = CharacterParser.getInstance();
 this.name = name;
 this.phOne= phone;
 this.item_type = type;
 this.item_en = parser.getSelling(name).toUpperCase().trim();
 if(!item_en.matches("[A-Z]+")){
 item_en = "#"+item_en;
 }
 }

 /*
 *省略geter和seter方法 
 */
}

public class PinyinComparator implements Comparator{
 public int compare(DataBean o1, DataBean o2){
 if (o1.getItem_en().equals("@")
 || o2.getItem_en().equals("#")){
 return -1;
 } else if (o1.getItem_en().equals("#")
 || o2.getItem_en().equals("@")) {
 return 1;
 } else {
 return o1.getItem_en().compareTo(o2.getItem_en());
 }
 }
}

public class ListUtil {
 public static void sortList(List list){
 List _List = new ArrayList();
 Collections.sort(list, new PinyinComparator());
 DataBean dataBean = new DataBean(getFirstCharacter(list.get(0).getItem_en()), "",DataBean.TYPE_CHARACTER);
 String currentCharacter = getFirstCharacter(list.get(0).getItem_en());
 _List.add(dataBean);
 _List.add(list.get(0));
 for(int i=1;i