packagenet.yt.yuncare.widgets;importandroid.graphics.Bitmap;importandroid.graphics.Canvas;importandroid.graphics.Color;importandroid.graphics.Paint;import java.lang.*;importjava.util.Random;/*** Created by lenovo on 2018/5/14.*/

public classCode {//隨機數(shù)數(shù)組

private static final char[] CHARS ={'2', '3', '4', '5', '6', '7', '8', '9','a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'j', 'k', 'm','n', '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', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z'};private staticCode bmpCode;public static Code getInstance() { //單例模式

if(bmpCode == null)

bmpCode= newCode();returnbmpCode;

}//default settings//驗證碼默認(rèn)隨機數(shù)的個數(shù)

private static final int DEFAULT_CODE_LENGTH = 4;//默認(rèn)字體大小

private static final int DEFAULT_FONT_SIZE = 35;//默認(rèn)線條的條數(shù)

private static final int DEFAULT_LINE_NUMBER = 2;//padding值

private static final int BASE_PADDING_LEFT = 10, RANGE_PADDING_LEFT = 15, BASE_PADDING_TOP = 15, RANGE_PADDING_TOP = 20;//驗證碼的默認(rèn)寬高

private static final int DEFAULT_WIDTH = 100, DEFAULT_HEIGHT = 40;//settings decided by the layout xml//canvas width and height

private int width = DEFAULT_WIDTH, height =DEFAULT_HEIGHT;//random word space and pading_top

private int base_padding_left = BASE_PADDING_LEFT, range_padding_left =RANGE_PADDING_LEFT,

base_padding_top= BASE_PADDING_TOP, range_padding_top =RANGE_PADDING_TOP;//number of chars, lines; font size

private int codeLength = DEFAULT_CODE_LENGTH, line_number = DEFAULT_LINE_NUMBER, font_size =DEFAULT_FONT_SIZE;//variables

privateString code;private intpadding_left, padding_top;private Random random = newRandom();//生成驗證碼圖片 在外部Image調(diào)用，用setImageBitmap添加圖片到ImageView控件中

publicBitmap createBitmap() {

padding_left= 0;//重點：創(chuàng)建Bt圖片

Bitmap bp = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); // Canvas c = new Canvas(bp);//創(chuàng)建畫板導(dǎo)入bt圖片

code=createCode();

c.drawColor(Color.WHITE);//添加畫板背景色為白色

Paint paint = new Paint();//創(chuàng)建畫筆

paint.setAntiAlias(true);

paint.setTextSize(font_size);//設(shè)置畫筆大小//畫驗證碼

for (int i = 0; i < code.length(); i++) {

randomTextStyle(paint);//畫筆傳入生成隨機樣式

randomPadding();

c.drawText(code.charAt(i)+ "", padding_left, padding_top, paint);

}//畫線條

for (int i = 0; i < line_number; i++) {

drawLine(c, paint);

}

c.save( Canvas.ALL_SAVE_FLAG );//保存

c.restore();// returnbp;

}publicString getCode() {returncode;

}//生成驗證碼

privateString createCode() {

StringBuilder buffer= newStringBuilder();for (int i = 0; i < codeLength; i++) {

buffer.append(CHARS[random.nextInt(CHARS.length)]);

}returnbuffer.toString();

}//畫干擾線

private voiddrawLine(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);

}//生成隨機顏色

private intrandomColor() {return randomColor(1);

}private int randomColor(intrate) {int red = random.nextInt(256) /rate;int green = random.nextInt(256) /rate;int blue = random.nextInt(256) /rate;returnColor.rgb(red, green, blue);

}//隨機生成文字樣式，顏色，粗細(xì)，傾斜度

private voidrandomTextStyle(Paint paint) {int color =randomColor();

paint.setColor(color);

paint.setFakeBoldText(random.nextBoolean());//true為粗體，false為非粗體//float skewX = random.nextInt(11) / 10;//skewX = random.nextBoolean() ? skewX : -skewX;//paint.setTextSkewX(skewX);//float類型參數(shù)，負(fù)數(shù)表示右斜，整數(shù)左斜//paint.setUnderlineText(true);//true為下劃線，false為非下劃線//paint.setStrikeThruText(true);//true為刪除線，false為非刪除線

}//隨機生成padding值

private voidrandomPadding() {

padding_left+= base_padding_left +random.nextInt(range_padding_left);

padding_top= base_padding_top +random.nextInt(range_padding_top);

}

}

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