BlackBerry中设置EditFiled的边框

对于Rom版本在4.6及以上时, 使用下面的方法, 参考Blackberry JDE API:

BasicEditField roundedBorderEdit = new BasicEditField();
XYEdges padding = new XYEdges(15, 15, 15, 15);
int color = Color.CRIMSON;
int lineStyle = Border.STYLE_DOTTED;
Border roundedBorder = BorderFactory.createRoundedBorder(padding, color, lineStyle);
roundedBorderEdit.setBorder(roundedBorder);

BasicEditField bevelBorderEdit = new BasicEditField();
XYEdges edges = new XYEdges(10, 10, 10, 10);
XYEdges outerColors = new XYEdges(Color.BLACK, Color.WHITE, Color.BLACK, Color.WHITE);
XYEdges innerColors = new XYEdges(Color.WHITE, Color.BLACK, Color.WHITE, Color.BLACK);
Border bevelBorder = BorderFactory.createBevelBorder(edges, outerColors, innerColors);
bevelBorderEdit.setBorder(bevelBorder);

对于Rom版本在4.5及以下时, 就只能通过draw bitmap的方法去实现了:

class BorderedEdit extends BasicEditField {
    Bitmap mBorder = null;

    public BorderedEdit(Bitmap borderBitmap) {
        mBorder = borderBitmap;
    }

    protected void paint(Graphics graphics) {
        graphics.drawBitmap(0, 0, mBorder.getWidth(), mBorder.getHeight(), mBorder, 0, 0);
        super.paint(graphics);
    }
}
BlackBerry中设置LabelFiled字体

可以直接使用LabelField.setFont, 下面提供两种例子去设置font.

第一种是使用已有的字体:

LabelField labelField = new LabelField("Hello World");
Font myFont = Font.getDefault().derive(Font.BOLD, 9, Ui.UNITS_pt);
labelField.setFont(myFont);

另一种是通过FontFamily获取font:

LabelField labelField = new LabelField("Hello World");
FontFamily fontFamily = FontFamily.forName("BBCasual");
Font myFont = fontFamily.derive(Font.ITALIC, 12, Ui.UNITS_pt);
labelField.setFont(myFont);

两个例子中有个地方注意一下: 我使用了UNITS_pt(points)而不是UNITS_px(pixels). 确实应该这么用, 因为黑莓通常屏幕尺寸和分辨率(DPI)都很小, 使用UNITS_pt可以带来更一致性的体验.

在第二个例子中, forName可能抛出ClassCastException, 你需要catch一下, 这个在文档中虽然没写, 但如果你使用了一个未知的name, 就可能出错.

官方还提供了一个例子:

LabelField displayLabel = new LabelField("Test", LabelField.FOCUSABLE) {
    protected void paintBackground(net.rim.device.api.ui.Graphics g) {
        g.clear();
        g.getColor();
        g.setColor(Color.CYAN);
        g.fillRect(0, 0, Display.getWidth(), Display.getHeight());
        g.setColor(Color.BLUE);               
    }
};  

FontFamily fontFamily[] = FontFamily.getFontFamilies();
Font font = fontFamily[1].getFont(FontFamily.CBTF_FONT, 8);
displayLabel.setFont(font);

参考: Dynamic LabelField Change Font

用于j2me环境的md5实现类

原生实现MD5算法的类, 主要用于一些特定的环境, 比如基于j2me的开发.

提供一个静态的函数toMD5()供调用.

还提供一个getMD5ofStr()函数生成一个MD5加密串.

package com.shanhh.md5tools;
import java.io.UnsupportedEncodingException;

//实现MD5算法的类,提供一个静态的函数toMD5()供调用;
//还提供一个getMD5ofStr()函数生成一个MD5加密串;
public class MD5Digest {
    static final int S11 = 7;
    static final int S12 = 12;
    static final int S13 = 17;
    static final int S14 = 22;
    static final int S21 = 5;
    static final int S22 = 9;
    static final int S23 = 14;
    static final int S24 = 20;
    static final int S31 = 4;
    static final int S32 = 11;
    static final int S33 = 16;
    static final int S34 = 23;
    static final int S41 = 6;
    static final int S42 = 10;
    static final int S43 = 15;
    static final int S44 = 21;
    static final byte PADDING[] = { -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
            0, 0, 0, 0, 0, 0, 0 };
    private long state[];
    private long count[];
    private byte buffer[];
    public String digestHexStr;
    private byte digest[];

    public String getMD5ofStr(String s) throws UnsupportedEncodingException {// 返回MD5串;
        int i;
        md5Init();
        md5Update(s.getBytes(), s.length());
        md5Final();
        digestHexStr = "";
        for (i = 0; i < 16; i++)
            digestHexStr = digestHexStr + byteHEX(digest[i]);
        return digestHexStr;
    }

    public MD5Digest() {
        state = new long[4];
        count = new long[2];
        buffer = new byte[64];
        digest = new byte[16];
        md5Init();
    }

    private void md5Init() {// 初始化部分变量;
        count[0] = 0L;
        count[1] = 0L;
        state[0] = 0x67452301L;
        state[1] = 0xefcdab89L;
        state[2] = 0x98badcfeL;
        state[3] = 0x10325476L;
    }

    private long F(long l, long l1, long l2) {
        return l & l1 | ~l & l2;
    }

    private long G(long l, long l1, long l2) {
        return l & l2 | l1 & ~l2;
    }

    private long H(long l, long l1, long l2) {
        return l ^ l1 ^ l2;
    }

    private long I(long l, long l1, long l2) {
        return l1 ^ (l | ~l2);
    }

    private long FF(long l, long l1, long l2, long l3, long l4, long l5, long l6) {
        l += F(l1, l2, l3) + l4 + l6;
        l = (int) l << (int) l5 | (int) l >>> (int) (32L - l5);
        l += l1;
        return l;
    }

    private long GG(long l, long l1, long l2, long l3, long l4, long l5, long l6) {
        l += G(l1, l2, l3) + l4 + l6;
        l = (int) l << (int) l5 | (int) l >>> (int) (32L - l5);
        l += l1;
        return l;
    }

    private long HH(long l, long l1, long l2, long l3, long l4, long l5, long l6) {
        l += H(l1, l2, l3) + l4 + l6;
        l = (int) l << (int) l5 | (int) l >>> (int) (32L - l5);
        l += l1;
        return l;
    }

    private long II(long l, long l1, long l2, long l3, long l4, long l5, long l6) {
        l += I(l1, l2, l3) + l4 + l6;
        l = (int) l << (int) l5 | (int) l >>> (int) (32L - l5);
        l += l1;
        return l;
    }

    private void md5Update(byte abyte0[], int i) {// 补位操作,abyte0为需要进行MD5加密的字符串,i为字符串长度;
        byte abyte1[] = new byte[64];
        int k = (int) (count[0] >>> 3) & 0x3f;
        if ((count[0] += i << 3) < (long) (i << 3))
            count[1]++;
        count[1] += i >>> 29;
        int l = 64 - k;
        int j;
        if (i >= l) {
            md5Memcpy(buffer, abyte0, k, 0, l);
            md5Transform(buffer);
            for (j = l; j + 63 < i; j += 64) {
                md5Memcpy(abyte1, abyte0, 0, j, 64);
                md5Transform(abyte1);
            }
            k = 0;
        } else {
            j = 0;
        }
        md5Memcpy(buffer, abyte0, k, j, i - j);
    }

    private void md5Final() {// 最终处理,将得到的128位(16字节)MD5码存放在digest数组中
        byte abyte0[] = new byte[8];
        encode(abyte0, count, 8);
        int i = (int) (count[0] >>> 3) & 0x3f;
        int j = i >= 56 ? 120 - i : 56 - i;
        md5Update(PADDING, j);
        md5Update(abyte0, 8);
        encode(digest, state, 16);
    }

    private void md5Memcpy(byte abyte0[], byte abyte1[], int i, int j, int k) {
        for (int l = 0; l < k; l++)
            abyte0[i + l] = abyte1[j + l];
    }

    private void md5Transform(byte abyte0[]) {
        long l = state[0];
        long l1 = state[1];
        long l2 = state[2];
        long l3 = state[3];
        long al[] = new long[16];
        decode(al, abyte0, 64);
        l = FF(l, l1, l2, l3, al[0], 7L, 0xd76aa478L);
        l3 = FF(l3, l, l1, l2, al[1], 12L, 0xe8c7b756L);
        l2 = FF(l2, l3, l, l1, al[2], 17L, 0x242070dbL);
        l1 = FF(l1, l2, l3, l, al[3], 22L, 0xc1bdceeeL);
        l = FF(l, l1, l2, l3, al[4], 7L, 0xf57c0fafL);
        l3 = FF(l3, l, l1, l2, al[5], 12L, 0x4787c62aL);
        l2 = FF(l2, l3, l, l1, al[6], 17L, 0xa8304613L);
        l1 = FF(l1, l2, l3, l, al[7], 22L, 0xfd469501L);
        l = FF(l, l1, l2, l3, al[8], 7L, 0x698098d8L);
        l3 = FF(l3, l, l1, l2, al[9], 12L, 0x8b44f7afL);
        l2 = FF(l2, l3, l, l1, al[10], 17L, 0xffff5bb1L);
        l1 = FF(l1, l2, l3, l, al[11], 22L, 0x895cd7beL);
        l = FF(l, l1, l2, l3, al[12], 7L, 0x6b901122L);
        l3 = FF(l3, l, l1, l2, al[13], 12L, 0xfd987193L);
        l2 = FF(l2, l3, l, l1, al[14], 17L, 0xa679438eL);
        l1 = FF(l1, l2, l3, l, al[15], 22L, 0x49b40821L);
        l = GG(l, l1, l2, l3, al[1], 5L, 0xf61e2562L);
        l3 = GG(l3, l, l1, l2, al[6], 9L, 0xc040b340L);
        l2 = GG(l2, l3, l, l1, al[11], 14L, 0x265e5a51L);
        l1 = GG(l1, l2, l3, l, al[0], 20L, 0xe9b6c7aaL);
        l = GG(l, l1, l2, l3, al[5], 5L, 0xd62f105dL);
        l3 = GG(l3, l, l1, l2, al[10], 9L, 0x2441453L);
        l2 = GG(l2, l3, l, l1, al[15], 14L, 0xd8a1e681L);
        l1 = GG(l1, l2, l3, l, al[4], 20L, 0xe7d3fbc8L);
        l = GG(l, l1, l2, l3, al[9], 5L, 0x21e1cde6L);
        l3 = GG(l3, l, l1, l2, al[14], 9L, 0xc33707d6L);
        l2 = GG(l2, l3, l, l1, al[3], 14L, 0xf4d50d87L);
        l1 = GG(l1, l2, l3, l, al[8], 20L, 0x455a14edL);
        l = GG(l, l1, l2, l3, al[13], 5L, 0xa9e3e905L);
        l3 = GG(l3, l, l1, l2, al[2], 9L, 0xfcefa3f8L);
        l2 = GG(l2, l3, l, l1, al[7], 14L, 0x676f02d9L);
        l1 = GG(l1, l2, l3, l, al[12], 20L, 0x8d2a4c8aL);
        l = HH(l, l1, l2, l3, al[5], 4L, 0xfffa3942L);
        l3 = HH(l3, l, l1, l2, al[8], 11L, 0x8771f681L);
        l2 = HH(l2, l3, l, l1, al[11], 16L, 0x6d9d6122L);
        l1 = HH(l1, l2, l3, l, al[14], 23L, 0xfde5380cL);
        l = HH(l, l1, l2, l3, al[1], 4L, 0xa4beea44L);
        l3 = HH(l3, l, l1, l2, al[4], 11L, 0x4bdecfa9L);
        l2 = HH(l2, l3, l, l1, al[7], 16L, 0xf6bb4b60L);
        l1 = HH(l1, l2, l3, l, al[10], 23L, 0xbebfbc70L);
        l = HH(l, l1, l2, l3, al[13], 4L, 0x289b7ec6L);
        l3 = HH(l3, l, l1, l2, al[0], 11L, 0xeaa127faL);
        l2 = HH(l2, l3, l, l1, al[3], 16L, 0xd4ef3085L);
        l1 = HH(l1, l2, l3, l, al[6], 23L, 0x4881d05L);
        l = HH(l, l1, l2, l3, al[9], 4L, 0xd9d4d039L);
        l3 = HH(l3, l, l1, l2, al[12], 11L, 0xe6db99e5L);
        l2 = HH(l2, l3, l, l1, al[15], 16L, 0x1fa27cf8L);
        l1 = HH(l1, l2, l3, l, al[2], 23L, 0xc4ac5665L);
        l = II(l, l1, l2, l3, al[0], 6L, 0xf4292244L);
        l3 = II(l3, l, l1, l2, al[7], 10L, 0x432aff97L);
        l2 = II(l2, l3, l, l1, al[14], 15L, 0xab9423a7L);
        l1 = II(l1, l2, l3, l, al[5], 21L, 0xfc93a039L);
        l = II(l, l1, l2, l3, al[12], 6L, 0x655b59c3L);
        l3 = II(l3, l, l1, l2, al[3], 10L, 0x8f0ccc92L);
        l2 = II(l2, l3, l, l1, al[10], 15L, 0xffeff47dL);
        l1 = II(l1, l2, l3, l, al[1], 21L, 0x85845dd1L);
        l = II(l, l1, l2, l3, al[8], 6L, 0x6fa87e4fL);
        l3 = II(l3, l, l1, l2, al[15], 10L, 0xfe2ce6e0L);
        l2 = II(l2, l3, l, l1, al[6], 15L, 0xa3014314L);
        l1 = II(l1, l2, l3, l, al[13], 21L, 0x4e0811a1L);
        l = II(l, l1, l2, l3, al[4], 6L, 0xf7537e82L);
        l3 = II(l3, l, l1, l2, al[11], 10L, 0xbd3af235L);
        l2 = II(l2, l3, l, l1, al[2], 15L, 0x2ad7d2bbL);
        l1 = II(l1, l2, l3, l, al[9], 21L, 0xeb86d391L);
        state[0] += l;
        state[1] += l1;
        state[2] += l2;
        state[3] += l3;
    }

    private void encode(byte abyte0[], long al[], int i) {
        // 转换函数,将al中long型的变量输出到byte型的数组abyte0中,
        // 低位字节在前,高位字节在后;
        int j = 0;
        for (int k = 0; k < i; k += 4) {
            abyte0[k] = (byte) (int) (al[j] & 255L);
            abyte0[k + 1] = (byte) (int) (al[j] >>> 8 & 255L);
            abyte0[k + 2] = (byte) (int) (al[j] >>> 16 & 255L);
            abyte0[k + 3] = (byte) (int) (al[j] >>> 24 & 255L);
            j++;
        }
    }

    private void decode(long al[], byte abyte0[], int i) {
        int j = 0;
        for (int k = 0; k < i; k += 4) {
            al[j] = b2iu(abyte0[k]) | b2iu(abyte0[k + 1]) << 8
                    | b2iu(abyte0[k + 2]) << 16 | b2iu(abyte0[k + 3]) << 24;
            j++;
        }
    }

    public static long b2iu(byte byte0) {
        return byte0 >= 0 ? byte0 : byte0 & 0xff;
    }

    public static String byteHEX(byte byte0) {// 字节到十六进制的ASCII码转换
        char ac[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A',
                'B', 'C', 'D', 'E', 'F' };
        char ac1[] = new char[2];
        ac1[0] = ac[byte0 >>> 4 & 0xf];
        ac1[1] = ac[byte0 & 0xf];
        String s = new String(ac1);
        return s;
    }

    public static String toMD5(String s) throws UnsupportedEncodingException {
        MD5Digest md5 = new MD5Digest();
        return md5.getMD5ofStr(s);
    }

}

Download MD5Digest.java

为 git 实现 'svn info' 的功能

git没有类似svn中的’svn info’功能, 自己写一个脚本来实现这样的功能:

#!/bin/sh

# Find base of git directory
while [ ! -d .git ] && [ ! `pwd` = "/" ]; do cd ..; done

# Show various information about this git directory
if [ -d .git ]; then
    echo "== Remote URL: `git remote -v`"

    echo "== Remote Branches: "
    git branch -r
    echo
    echo "== Local Branches:"
    git branch
    echo
    echo "== Configuration (.git/config)"
    cat .git/config
    echo
    echo "== Most Recent Commit"
    git --no-pager log --max-count=1
    echo
    echo "Type 'git log&' for more commits, or 'git show' for full commit details."
else
    echo "Not a git repository."
fi

运行效果如下:

== Remote URL: origin https://danshan@bitbucket.org/danshan/haidaofm.git (fetch)
origin https://danshan@bitbucket.org/danshan/haidaofm.git (push)
== Remote Branches:
origin/HEAD -> origin/master
origin/master

== Local Branches:
* master

== Configuration (.git/config)
[core]
repositoryformatversion = 0
filemode = true
bare = false
logallrefupdates = true
[remote "origin"]
fetch = +refs/heads/*:refs/remotes/origin/*
url = https://danshan@bitbucket.org/danshan/haidaofm.git
[branch "master"]
remote = origin
merge = refs/heads/master

== Most Recent Commit
commit 843423895f429aa6d78be1b2d26fb93472c64548
Author: Dan Shan
Date: Mon Oct 15 07:12:33 2012 +0400

webapi
[bugfix]
1. fix some import error of java

Type 'git log' for more commits, or 'git show' for full commit details.

Download gitinfo.zip

Java判断字符串是否含有中文字符

有时候需要验证一个字符串中是否含有中文这样的特殊的需求, 一般会采用两种方案, 一种就是最常见的正则表达式, 另一种效率较高, 但是不够严谨, 适用于不是非常精确的场合.

String str = "测试中文";
System.out.println(str.getBytes().length == str.length); // 为false是则包含中文

getBytes

public byte[] **getBytes**(Charset charset)

使用给定的charset将此String编码到byte序列, 并将结果存储到新的byte数组.

此方法总是使用此字符集的默认代替byte数组替代错误输入和不可映射字符序列. 如果需要对编码过程进行更多控制, 则应该使用CharsetEncoder类.

参数:

charset – 用于编码String的Charset

返回:

所得byte数组

从以下版本开始:

1.6