public class SideBar  extends View{
private static final String TAG = "SideBar";
private static String minue="A";
/**
 * 觸摸事件
 */
private ITouchingLetterChangedListener onTouchingLetterChangedListener;
/**
 * 側(cè)邊欄顯示字母
 */
private String[] words = { "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", "#" };
/**
 * 是否選中
 */
private int choose = -1;

private int chooseup=-1;
/**
 * 相應(yīng)的畫筆
 */
private Paint paint;

/**
 * 構(gòu)造函數(shù) 數(shù)據(jù)初始化
 * @param context 上下文對象
 * @param attrs   屬性列表
 * @param defStyleAttr 默認(rèn)樣式
 */
public SideBar(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    init();
}
/**
 * 初始化相應(yīng)的數(shù)據(jù)
 */
private void init() {
    paint = new Paint();
}
/**
 * 構(gòu)造函數(shù) 數(shù)據(jù)初始化
 * @param context 上下文對象
 * @param attrs  屬性列表
 */
public SideBar(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
}

/**
 * 構(gòu)造函數(shù) 數(shù)據(jù)初始化
 * @param context  上下文對象
 */
public SideBar(Context context) {
    this(context, null);
}

/**
 * 繪制列表控件的方法
 * 將要繪制的字母以從上到下的順序繪制在一個指定區(qū)域
 * 如果是進行選中的字母就進行高亮顯示
 */
@Override
protected void onDraw(Canvas canvas) {
    // TODO Auto-generated method stub
    super.onDraw(canvas);
    int height = getHeight();// 獲取對應(yīng)高度
    int width = getWidth(); // 獲取對應(yīng)寬度
    int singleWidth = width / words.length;// 獲取每一個字母的寬度

    for (int i = 0; i < words.length; i++) {
        paint.setColor(getResources().getColor(R.color.indexadc));
        // paint.setColor(Color.WHITE);
        paint.setTypeface(Typeface.DEFAULT_BOLD);

        paint.setTextSize(20f);
        // 選中的狀態(tài)
        if (i == choose) {
            chooseup=choose;
            paint.setColor(getResources().getColor(R.color.indexabc));
            paint.setFakeBoldText(true);
        }
        // x坐標(biāo)等于中間-字符串寬度的一半.
        //float yPos = height / 2.0f - paint.measureText(words[i]) / 2.0f;
        float yPos = height / 2.0f - paint.measureText(words[0]) / 2.0f;
        float xPos = singleWidth * i + singleWidth/2;
        if (words[i]=="I") {  //解決當(dāng)繪制字母I時會左右距離不同問題
            xPos = singleWidth * i + singleWidth/2+paint.measureText(words[0]) / 2.0f;
        }
        canvas.drawText(words[i], xPos, yPos, paint);
        paint.reset();// 重置畫筆
    }
}
boolean isup=false;

/**
 * 處理觸摸事件的方法
 * 用戶按下時候，整個控件背景變化
 * 根據(jù)按下x坐標(biāo) 判斷究竟用戶按下那個字母
 * 當(dāng)前字母高亮顯示 將其字母顯示屏幕中央
 */
@SuppressWarnings("deprecation")
@Override
public boolean dispatchTouchEvent(MotionEvent event) {
    int action = event.getAction();
    final float x = event.getX();// 點擊x坐標(biāo)
    final int oldChoose = choose;
    final ITouchingLetterChangedListener listener = onTouchingLetterChangedListener;
    final int c = (int) (x / getWidth() * words.length);// 點擊x坐標(biāo)所占總寬度的比例*b數(shù)組的長度就等于點擊b中的個數(shù).
    switch (action) {

    case MotionEvent.ACTION_UP:
        isup=true;
        FragmentContacts.hideADCtip();
        setBackgroundDrawable(new ColorDrawable(0x00000000));
        choose = -1;//
        invalidate();
        break;

    default:
        isup=false;
        //setBackgroundResource(R.drawable.sidebar_background);
        if (oldChoose != c) {
            if (c >= 0 && c < words.length) {
                if (listener != null) {
                    listener.OnTouchingLetterChanged(words[c]);
                }
                choose = c;
                invalidate();
            }
        }
        break;
    }
    return true;
}


//listView滑動可見第一個字母
public void setPosition(String position){
    Log.i(TAG, "position"+position);
    //isshow=true;
    minue=position;
}

/**
 * 接口
 */
public interface ITouchingLetterChangedListener {
    void OnTouchingLetterChanged(String cString);
}

/**
 * 字母改變的監(jiān)聽器
 * @return  獲取字母改變的監(jiān)聽器
 */
public ITouchingLetterChangedListener getOnTouchingLetterChangedListener() {
    return onTouchingLetterChangedListener;
}

/**
 * 設(shè)置改變的監(jiān)聽器
 * @param onTouchingLetterChangedListener 設(shè)置字母改變的監(jiān)聽器
 */
public void setOnTouchingLetterChangedListener(
        ITouchingLetterChangedListener onTouchingLetterChangedListener) {
    this.onTouchingLetterChangedListener = onTouchingLetterChangedListener;
}

}