滑动字母定位listview的对应字母的item

效果图：

自定义右侧sideBar获取焦点改变背景颜色. 显示有焦点的字母；
主要代码：

    /**
     * 重写这个方法 
     */
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        // 获取焦点改变背景颜色.  
        int height = getHeight();//  获取对应高度  
        int width = getWidth(); // 获取对应宽度
        int singleHeight = height / b.length;// 获取每一个字母的高度

        for (int i = 0; i < b.length; i++) {
            paint.setColor(Color.rgb(33, 65, 98));
            // paint.setColor(Color.WHITE);
            paint.setTypeface(Typeface.DEFAULT_BOLD);
            paint.setAntiAlias(true);
            paint.setTextSize(20);
            //选中的状�? 
            if (i == choose) {
                paint.setColor(Color.parseColor("#3399ff"));
                paint.setFakeBoldText(true);
            }
            //x坐标等于中间-字符串宽度的�?�?.
            float xPos = width / 2 - paint.measureText(b[i]) / 2;
            float yPos = singleHeight * i + singleHeight;
            canvas.drawText(b[i], xPos, yPos, paint);
            paint.reset();// 重置画笔 
        }

    }

    @SuppressLint("NewApi")
    @Override
    public boolean dispatchTouchEvent(MotionEvent event) {
        final int action = event.getAction();
        final float y = event.getY();// 点击y坐标
        final int oldChoose = choose;
        final OnTouchingLetterChangedListener listener = onTouchingLetterChangedListener;
        final int c = (int) (y / getHeight() * b.length);// 点击y坐标�?占�?�高度的比例*b数组的长度就等于点击b中的个数. 

        switch (action) {
        case MotionEvent.ACTION_UP:
//          setBackgroundDrawable(new ColorDrawable(0x00000000));
            setBackground(new ColorDrawable(0x00000000));
            choose = -1;//
            invalidate();
            if (mTextDialog != null) {
                mTextDialog.setVisibility(View.INVISIBLE);
            }
            break;

        default:
            setBackgroundResource(R.drawable.sidebar_background);
            if (oldChoose != c) {
                if (c >= 0 && c < b.length) {
                    if (listener != null) {
                        listener.onTouchingLetterChanged(b[c]);
                    }
                    if (mTextDialog != null) {
                        mTextDialog.setText(b[c]);
                        mTextDialog.setVisibility(View.VISIBLE);
                    }

                    choose = c;
                    invalidate();
                }
            }

            break;
        }
        return true;
    }

汉子转拼音
* /* * 汉字转成ASCII码 * * @param chs * @return */
private int getChsAscii(String chs) {
int asc = 0;
try {
byte[] bytes = chs.getBytes(“gb2312”);
if (bytes == null || bytes.length > 2 || bytes.length <= 0) {
throw new RuntimeException(“illegal resource string”);
}
if (bytes.length == 1) {
asc = bytes[0];
}
if (bytes.length == 2) {
int hightByte = 256 + bytes[0];
int lowByte = 256 + bytes[1];
asc = (256 * hightByte + lowByte) - 256 * 256;
}
} catch (Exception e) {
System.out.println(“ERROR:ChineseSpelling.class-getChsAscii(String chs)” + e);
}
return asc;
}

 /** * 单字解析 * * @param str * @return */  
public String convert(String str) {
    String result = null;
    int ascii = getChsAscii(str);
    if (ascii > 0 && ascii < 160) {
        result = String.valueOf((char) ascii);
    } else {
        for (int i = (pyvalue.length - 1); i >= 0; i--) {
            if (pyvalue[i] <= ascii) {
                result = pystr[i];
                break;
            }
        }
    }
    return result;
}

/** * 词组解析 * * @param chs * @return */  
public String getSelling(String chs) {
    String key, value;
    buffer = new StringBuilder();
    for (int i = 0; i < chs.length(); i++) {
        key = chs.substring(i, i + 1);
        if (key.getBytes().length >= 2) {
            value = (String) convert(key);
            if (value == null) {
                value = "unknown";
            }
        } else {
            value = key;
        }
        buffer.append(value);
    }
    return buffer.toString();
}**

对ListView里面的数据根据ABCDEFG…来排序
**public int compare(SortModel o1, SortModel o2) {
//这里主要是用来对ListView里面的数据根据ABCDEFG…来排序
if (o1.getSortLetters().equals(“@”)
|| o2.getSortLetters().equals(“#”)) {
return -1;
} else if (o1.getSortLetters().equals(“#”)
|| o2.getSortLetters().equals(“@”)) {
return 1;
} else {
return o1.getSortLetters().compareTo(o2.getSortLetters());
}
}**

github下载地址：https://github.com/shenglintang/SlippingSearch
csdn下载地址：http://download.youkuaiyun.com/my