Android刮奖控件，需要的直接拿去用

直接上效果图
功能特色：
1、可以设置刮开后显示文字或图片
2、可以统计已刮开区域所占百分比
Demo下载地址：
RubberDemo.rar
下面是源码：
@SuppressLint("HandlerLeak")public class RubberView extends TextView {private static final int W = 480;private static final int H = 800;private static final int MV = 1;private static final int SW = 50;private static final int MC = 0xFFD6D6D6;private int mWidth;private int mHeight;private int mMaskColor;private int mStrokeWidth;private float mX;private float mY;private boolean mRun;private boolean caculate;private Path mPath;private Paint mPaint;private Paint mBitmapPaint;private Canvas mCanvas;private Bitmap mBitmap;private int[] mPixels;private Thread mThread;private onWipeListener mWipeListener;public RubberView(Context context) {super(context);init(context);}public RubberView(Context context, AttributeSet attrs) {super(context, attrs);init(context);}private final void init(Context context) {mMaskColor = MC;mStrokeWidth = SW;mPath = new Path();mBitmapPaint = new Paint();mPaint = new Paint();mPaint.setAntiAlias(true);// 抗锯齿mPaint.setDither(true);// 递色mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));mPaint.setStyle(Paint.Style.STROKE);mPaint.setStrokeJoin(Paint.Join.ROUND); // 前圆角mPaint.setStrokeCap(Paint.Cap.ROUND); // 后圆角mPaint.setStrokeWidth(mStrokeWidth); // 笔宽mBitmap = Bitmap.createBitmap(W, H, Config.ARGB_8888);mCanvas = new Canvas(mBitmap);mCanvas.drawColor(mMaskColor);mRun = true;mThread = new Thread(mRunnable);mThread.start();setGravity(Gravity.CENTER);}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);mCanvas.drawPath(mPath, mPaint);canvas.drawBitmap(mBitmap, 0, 0, mBitmapPaint);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {super.onMeasure(widthMeasureSpec, heightMeasureSpec);int w = MeasureSpec.getSize(widthMeasureSpec);int h = MeasureSpec.getSize(heightMeasureSpec);if (w > 0 && h > 0) {mWidth = w;mHeight = h;}}public void reset() {mPath.reset();mCanvas.drawPaint(mPaint);mCanvas.drawColor(mMaskColor);invalidate();}public void setOnWipeListener(onWipeListener listerer) {this.mWipeListener = listerer;}public void setStrokeWidth(int width) {this.mStrokeWidth = width;mPaint.setStrokeWidth(width);}public void setMaskColor(int color) {this.mMaskColor = color;reset();}@Overridepublic boolean onTouchEvent(MotionEvent event) {boolean invalidate = false;boolean consume = false;int action = event.getAction();switch (action) {case MotionEvent.ACTION_DOWN:consume = true;touchDown(event);break;case MotionEvent.ACTION_MOVE:consume = true;invalidate = touchMove(event);break;case MotionEvent.ACTION_UP:consume = true;touchUp(event);break;}if (invalidate) {invalidate();}if (consume) {return true;}return super.onTouchEvent(event);}// 手指点下屏幕时调用private void touchDown(MotionEvent event) {caculate = false;// 重置绘制路线，即隐藏之前绘制的轨迹mPath.reset();float x = event.getX();float y = event.getY();mX = x;mY = y;// mPath绘制的绘制起点mPath.moveTo(x, y);}// 手指在屏幕上滑动时调用private boolean touchMove(MotionEvent event) {caculate = false;final float x = event.getX();final float y = event.getY();final float previousX = mX;final float previousY = mY;// 设置贝塞尔曲线的操作点为起点和终点的一半float cX = (x + previousX) / 2;float cY = (y + previousY) / 2;final float dx = Math.abs(x - previousX);final float dy = Math.abs(y - previousY);boolean move = false;if (dx >= MV || dy >= MV) {// 二次贝塞尔，实现平滑曲线；cX, cY为操作点 x,y为终点mPath.quadTo(cX, cY, x, y);// 第二次执行时，第一次结束调用的坐标值将作为第二次调用的初始坐标值mX = x;mY = y;move = true;}return move;}private void touchUp(MotionEvent event) {caculate = true;mRun = true;}private Runnable mRunnable = new Runnable() {@Overridepublic void run() {while (mRun) {SystemClock.sleep(100);// 收到计算命令，立即开始计算if (caculate) {caculate = false;int w = mWidth;int h = mHeight;float wipeArea = 0;float totalArea = w * h;// 计算耗时100毫秒左右Bitmap bitmap = mBitmap;if (mPixels == null) {mPixels = new int[w * h];}bitmap.getPixels(mPixels, 0, w, 0, 0, w, h);for (int i = 0; i < w; i++) {for (int j = 0; j < h; j++) {int index = i + j * w;if (mPixels[index] == 0) {wipeArea++;}}}if (wipeArea > 0 && totalArea > 0) {int percent = (int) (wipeArea * 100 / totalArea);Message msg = mHandler.obtainMessage();msg.what = 0x1;msg.arg1 = percent;mHandler.sendMessage(msg);}}}}};private Handler mHandler = new Handler() {public void handleMessage(Message msg) {if (mWipeListener != null) {int percent = msg.arg1;mWipeListener.onWipe(percent);}};};public interface onWipeListener {public void onWipe(int percent);}@Overrideprotected void onDetachedFromWindow() {super.onDetachedFromWindow();mRun = false;}}
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