package com.yidianling.common.view;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.widget.ImageView;
import java.util.Random;
/**
* 随机生成验证码，使用方法：
* <p>
* 拿到验证码图片ImageView
* mIvCode.setImageBitmap(RxCaptcha.getInstance().createBitmap());
* int code=RxCaptcha.getInstance().getCode();
* <p>
* 只需生成验证码值 String
*
* <p/>
* RxCaptcha
* 2015年2月10日 上午11:32:34
*
* @version 1.0.0
*/
public class RxCaptcha {
public static RxCaptcha build() {
if (rxCaptcha == null) {
rxCaptcha = new RxCaptcha();
}
return rxCaptcha;
}
private static final char[] CHARS_NUMBER = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
private static final char[] CHARS_LETTER = {'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', '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 static final char[] CHARS_ALL = {'0', '1', '2', '3', '4', '5', '6',
'7', '8', '9', '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', '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 static RxCaptcha rxCaptcha;
private TYPE type = TYPE.CHARS;
public enum TYPE{
NUMBER,LETTER,CHARS
}
private RxCaptcha() {
}
private RxCaptcha(TYPE types) {
this.type = types;
}
public static RxCaptcha getInstance(TYPE types) {
if (rxCaptcha == null) {
rxCaptcha = new RxCaptcha(types);
}
return rxCaptcha;
}
// default settings
private static final int DEFAULT_CODE_LENGTH = 4;// 验证码的长度 这里是4位
private static final int DEFAULT_FONT_SIZE = 60;// 字体大小
private static final int DEFAULT_LINE_NUMBER = 0;// 多少条干扰线
private static final int BASE_PADDING_LEFT = 20; // 左边距
private static final int RANGE_PADDING_LEFT = 20;// 左边距范围值
private static final int BASE_PADDING_TOP = 42;// 上边距
private static final int RANGE_PADDING_TOP = 15;// 上边距范围值
private static int DEFAULT_WIDTH = 200;// 默认宽度.图片的总宽
private static int DEFAULT_HEIGHT = 70;// 默认高度.图片的总高
private int DEFAULT_COLOR = 0xdf;// 默认背景颜色值
// settings decided by the layout xml
// canvas width and height
private int width = DEFAULT_WIDTH;
private int height = DEFAULT_HEIGHT;
// random word space and pading_top
private int base_padding_left = BASE_PADDING_LEFT;
private int range_padding_left = RANGE_PADDING_LEFT;
private int base_padding_top = BASE_PADDING_TOP;
private int range_padding_top = RANGE_PADDING_TOP;
// number of chars, lines; font size
private int codeLength = DEFAULT_CODE_LENGTH;
private int line_number = DEFAULT_LINE_NUMBER;
private int font_size = DEFAULT_FONT_SIZE;
// variables
private String code;// 保存生成的验证码
private int padding_left, padding_top;
private Random random = new Random();
/**
* @param length 验证码的长度
* @return
*/
public RxCaptcha codeLength(int length) {
codeLength = length;
return rxCaptcha;
}
/**
* @param size 字体大小
* @return
*/
public RxCaptcha fontSize(int size) {
font_size = size;
return rxCaptcha;
}
/**
* @param number 干扰线 数量
* @return
*/
public RxCaptcha lineNumber(int number) {
line_number = number;
return rxCaptcha;
}
/**
* @return 背景颜色值
*/
public RxCaptcha backColor(int colorInt) {
DEFAULT_COLOR = colorInt;
return rxCaptcha;
}
public RxCaptcha type(TYPE type) {
this.type = type;
return rxCaptcha;
}
public RxCaptcha size(int width, int height) {
this.width = width;
this.height = height;
return rxCaptcha;
}
private Bitmap makeBitmap() {
padding_left = 0;
Bitmap bp = Bitmap.createBitmap(width, height, Config.ARGB_8888);
Canvas c = new Canvas(bp);
code = makeCode();
c.drawColor(Color.rgb(DEFAULT_COLOR, DEFAULT_COLOR, DEFAULT_COLOR));
Paint paint = new Paint();
paint.setTextSize(font_size);
for (int i = 0; i < code.length(); i++) {
randomTextStyle(paint);
randomPadding();
c.drawText(code.charAt(i) + "", padding_left, padding_top, paint);
}
for (int i = 0; i < line_number; i++) {
drawLine(c, paint);
}
c.save();// 保存
c.restore();//
return bp;
}
public String getCode() {
return code.toLowerCase();
}
public Bitmap into(ImageView imageView){
Bitmap bitmap = createBitmap();
if (imageView != null) {
imageView.setImageBitmap(bitmap);
}
return bitmap;
}
public String createCode() {
return makeCode();
}
private Bitmap mBitmapCode;
public Bitmap createBitmap() {
mBitmapCode = makeBitmap();
return mBitmapCode;
}
private String makeCode() {
StringBuilder buffer = new StringBuilder();
switch (type) {
case NUMBER:
for (int i = 0; i < codeLength; i++) {
buffer.append(CHARS_NUMBER[random.nextInt(CHARS_NUMBER.length)]);
}
break;
case LETTER:
for (int i = 0; i < codeLength; i++) {
buffer.append(CHARS_LETTER[random.nextInt(CHARS_LETTER.length)]);
}
break;
case CHARS:
for (int i = 0; i < codeLength; i++) {
buffer.append(CHARS_ALL[random.nextInt(CHARS_ALL.length)]);
}
break;
default:
for (int i = 0; i < codeLength; i++) {
buffer.append(CHARS_ALL[random.nextInt(CHARS_ALL.length)]);
}
break;
}
return buffer.toString();
}
private void drawLine(Canvas canvas, Paint paint) {
int color = randomColor();
int startX = random.nextInt(width);
int startY = random.nextInt(height);
int stopX = random.nextInt(width);
int stopY = random.nextInt(height);
paint.setStrokeWidth(1);
paint.setColor(color);
canvas.drawLine(startX, startY, stopX, stopY, paint);
}
private int randomColor() {
return randomColor(1);
}
private int randomColor(int rate) {
int red = random.nextInt(256) / rate;
int green = random.nextInt(256) / rate;
int blue = random.nextInt(256) / rate;
return Color.rgb(red, green, blue);
}
private void randomTextStyle(Paint paint) {
int color = randomColor();
paint.setColor(color);
paint.setFakeBoldText(random.nextBoolean()); // true为粗体，false为非粗体
float skewX = random.nextInt(11) / 10;
skewX = random.nextBoolean() ? skewX : -skewX;
// paint.setTextSkewX(skewX); // float类型参数，负数表示右斜，整数左斜
// paint.setUnderlineText(true); //true为下划线，false为非下划线
// paint.setStrikeThruText(true); //true为删除线，false为非删除线
}
private void randomPadding() {
padding_left += base_padding_left + random.nextInt(range_padding_left);
padding_top = base_padding_top + random.nextInt(range_padding_top);
}
}