自定义验证码图片view

public class CheckView extends View {Context mContext;String mCheckCode = null;Paint mTempPaint = new Paint();private final int mPointNum;private final int mLineNum;private  int mTextLength;private final float mTextSize;
//    private final int mTextColor;private final int mBgColor;// 验证码public CheckView(Context context, AttributeSet attrs) {super(context, attrs);mContext = context;TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.CheckView);// 获取随机点的个数mPointNum = a.getInteger(R.styleable.CheckView_point_num, 0);// 获取随机线的条数mLineNum = a.getInteger(R.styleable.CheckView_line_num, 0);// 获取验证码长度
//        mTextLength = a.getInteger(R.styleable.CheckView_text_length, 2);
//        mTextLength = mCheckCode.length();// 获取验证码字体大小mTextSize = a.getDimension(R.styleable.CheckView_text_size, 30);// 获取验证码字体颜色
//        mTextColor = a.getColor(R.styleable.CheckView_text_color, 0XFFFFFFFF);// 获取背景颜色mBgColor = a.getColor(R.styleable.CheckView_bg_color, 0XFFFFFFFF);a.recycle();mTempPaint.setAntiAlias(true);mTempPaint.setTextSize(mTextSize);mTempPaint.setStrokeWidth(3);
//        Log.d("CheckView", "point_num = " + mPointNum);
//        Log.d("CheckView", "line_num = " + mLineNum);
//        Log.d("CheckView", "text_length = " + mTextLength);
//        Log.d("CheckView", "text_color = " + mTextColor);
//        Log.d("CheckView", "text_size = " + mTextSize);
//        Log.d("CheckView", "bg_color = " + mBgColor);}public void onDraw(Canvas canvas) {// 生成验证码
//        mCheckCode = makeCheckCode();// 设置二维码背景色canvas.drawColor(mBgColor);final int height = getHeight();// 获得CheckView控件的高度final int width = getWidth();// 获得CheckView控件的宽度if (mTextLength==0){return;}int dx = width / mTextLength / 2;char[] checkNum = mCheckCode.toCharArray();for (int i = 0; i < mTextLength; i++) {// 绘制验证控件上的文本canvas.drawText("" + checkNum[i], dx, getPositon(height), mTempPaint);dx += width / (mTextLength + 1);}int[] line;for (int i = 0; i < mLineNum; i++) {// 划线line = getLine(height, width);canvas.drawLine(line[0], line[1], line[2], line[3], mTempPaint);}// 绘制小圆点int[] point;for (int i = 0; i < mPointNum; i++) {// 画点point = getPoint(height, width);canvas.drawCircle(point[0], point[1], 1, mTempPaint);}}/*** 生成新的验证码*/public void invaliChenkCode(String sss) {mCheckCode = sss;mTextLength = sss.length();invalidate();}public String getCheckCode() {return mCheckCode;}/*** 产生随机验证码** @return*/public String makeCheckCode() {StringBuffer sb = new StringBuffer();for (int i = 0; i < mTextLength; i++) {int temp = (int) (Math.random() * 10);sb.append(temp);}return sb.toString();}/*** 计算验证码的绘制y点位置** @param height 传入CheckView的高度值* @return*/public int getPositon(int height) {int tempPositoin = (int) (Math.random() * height);if (tempPositoin < 50) {tempPositoin += 50;}return tempPositoin;}/*** 随机产生划线的起始点坐标和结束点坐标** @param height 传入CheckView的高度值* @param width  传入CheckView的宽度值* @return 起始点坐标和结束点坐标*/public static int[] getLine(int height, int width) {int[] tempCheckNum = {0, 0, 0, 0};for (int i = 0; i < 4; i += 2) {tempCheckNum[i] = (int) (Math.random() * width);tempCheckNum[i + 1] = (int) (Math.random() * height);}return tempCheckNum;}/*** 随机产生点的圆心点坐标** @param height 传入CheckView的高度值* @param width  传入CheckView的宽度值* @return*/public static int[] getPoint(int height, int width) {int[] tempCheckNum = {0, 0, 0, 0};tempCheckNum[0] = (int) (Math.random() * width);tempCheckNum[1] = (int) (Math.random() * height);return tempCheckNum;}
}

 

<com.tianxinyw.mapclient.views.CheckViewandroid:id="@+id/mycheckview"android:layout_width="100dp"android:layout_height="35dp"android:layout_marginRight="6dp"kongqw:text_size="20dp"kongqw:line_num="7"kongqw:point_num="100"kongqw:bg_color="#3B88DA"/>

 

mycheckview.invaliChenkCode(7+"—"+2+"="+"？");