滑动字母定位listview的对应字母的item

来源：互联网发布：与连接网络相关的单词编辑：程序博客网时间：2024/05/29 17:54

效果图：

这里写图片描述

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.csdn.net/my

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