import java.util.Random;import android.content.Context;import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Matrix;import android.graphics.Paint;import android.graphics.Bitmap.Config;import android.util.AttributeSet;import android.util.Log;import android.view.View;public class ValidateImageView extends View {private String TAG = "ValidateImageView";private Paint paint = new Paint();/* * 验证码内容 */private String[] content = null;/* * 验证码图片 */private Bitmap bitmap = null;public ValidateImageView(Context context, AttributeSet attrs) {super(context, attrs);}@Overridepublic void draw(Canvas canvas) {// TODO Auto-generated method stubif (bitmap != null) {canvas.drawBitmap(bitmap, 0, 0, paint);} else {paint.setColor(Color.GRAY);paint.setTextSize(20);canvas.drawText("点击换一换", 10, 30, paint);}super.draw(canvas);}/** * 得到验证码；设置图片 * @param strContent 验证码的字符串数组 * @return */public String[] getValidataAndSetImage(String[] strContent) {content = strContent;//产生随机数，并返回String [] strRes = generageRadom(strContent);Log.i(TAG, "generate validate code: " + strRes[0] + strRes[1] + strRes[2] + strRes[3]);//String strRes = generageRadomStr(strContent);//传随机串和随机数bitmap = generateValidate(content,strRes);invalidate();return strRes;}private Bitmap generateValidate(String[] strContent,String [] strRes) {int width = 120,height = 50;int isRes = isStrContent(strContent);if (isRes == 0) {return null;}Bitmap sourceBitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888);Canvas canvas = new Canvas(sourceBitmap);Paint p = new Paint();p.setTextSize(height / 2);p.setFakeBoldText(true);p.setColor(getRandColor(200, 230, 170));canvas.drawText(strRes[0], 10, height / 2, p);Matrix m1 = new Matrix();m1.setRotate(15);canvas.setMatrix(m1);p.setColor(getRandColor(200, 230, 170));canvas.drawText(strRes[1], 40, height / 2, p);m1.setRotate(10);canvas.setMatrix(m1);p.setColor(getRandColor(200, 230, 170));canvas.drawText(strRes[2], 70, height / 2 - 10, p);m1.setRotate(15);canvas.setMatrix(m1);p.setColor(getRandColor(200, 230, 170));canvas.drawText(strRes[3], 100, height / 2 - 15, p);m1.setRotate(20);canvas.setMatrix(m1);//障碍设置int startX = 0,startY = 0,stopX = 0,stopY = 0;for (int i = 0; i < 55; i++) {startX = pointRadom(width);startY = pointRadom(height);stopX = pointRadom(15);stopY = pointRadom(15);p.setColor(getRandColor(200, 230, 220));canvas.drawLine(startX, startY - 20, startX + stopX, startY + stopY - 20, p);}canvas.save();return sourceBitmap;}private int isStrContent(String[] strContent) {if (strContent == null || strContent.length <= 0) {return 0;} else {return 1;}}/** * 从指定数组中随机取出4个字符(数组) * @param strContent * @return */private String[] generageRadom(String[] strContent){String[] str = new String[4];// 随机串的个数int count = strContent.length;// 生成4个随机数Random random = new Random();int randomResFirst = random.nextInt(count);int randomResSecond = random.nextInt(count);int randomResThird = random.nextInt(count);int randomResFourth = random.nextInt(count);str[0] = strContent[randomResFirst].toString().trim();str[1] = strContent[randomResSecond].toString().trim();str[2] = strContent[randomResThird].toString().trim();str[3] = strContent[randomResFourth].toString().trim();return str;}/** * 从指定数组中随机取出4个字符(字符串) * @param strContent * @return */private String generageRadomStr(String[] strContent){StringBuilder str = new StringBuilder();// 随机串的个数int count = strContent.length;// 生成4个随机数Random random = new Random();int randomResFirst = random.nextInt(count);int randomResSecond = random.nextInt(count);int randomResThird = random.nextInt(count);int randomResFourth = random.nextInt(count);str.append(strContent[randomResFirst].toString().trim());str.append(strContent[randomResSecond].toString().trim());str.append(strContent[randomResThird].toString().trim());str.append(strContent[randomResFourth].toString().trim());return str.toString();}private int pointRadom(int n){Random r = new Random();return r.nextInt(n);}/** * 给定范围获得随机颜色 * * @param rc * 0-255 * @param gc * 0-255 * @param bc * 0-255 * @return colorValue 颜色值，使用setColor(colorValue) */public int getRandColor(int rc, int gc, int bc) {Random random = new Random();if (rc > 255)rc = 255;if (gc > 255)gc = 255;if (bc > 255)bc = 255;int r = rc + random.nextInt(rc);int g = gc + random.nextInt(gc);int b = bc + random.nextInt(bc);return Color.rgb(r, g, b);}}
