Android 修改zxing二维码样式

主要修改onDraw方法里面的属性……

/*** This view is overlaid on top of the camera preview. It adds the viewfinder rectangle and partial* transparency outside it, as well as the laser scanner animation and result points.*/
public final class ViewfinderView extends View {private static final int[] SCANNER_ALPHA = {0, 64, 128, 192, 255, 192, 128, 64};private static final long ANIMATION_DELAY = 100L;private static final int OPAQUE = 0xFF;private final Paint paint;private Bitmap resultBitmap;private final int maskColor;private final int resultColor;private final int frameColor;private final int laserColor;private final int resultPointColor;private int scannerAlpha;private Collection<ResultPoint> possibleResultPoints;private Collection<ResultPoint> lastPossibleResultPoints;// This constructor is used when the class is built from an XML resource.public ViewfinderView(Context context, AttributeSet attrs) {super(context, attrs);// Initialize these once for performance rather than calling them every time in onDraw().paint = new Paint();Resources resources = getResources();maskColor = resources.getColor(R.color.viewfinder_mask);resultColor = resources.getColor(R.color.result_view);frameColor = resources.getColor(R.color.viewfinder_frame);laserColor = resources.getColor(R.color.viewfinder_laser);resultPointColor = resources.getColor(R.color.possible_result_points);scannerAlpha = 0;possibleResultPoints = new HashSet<ResultPoint>(5);}/*** 中间那条线每次刷新移动的距离*/private static final int SPEEN_DISTANCE = 20;/*** 中间滑动线的最顶端位置*/private int slideTop;/*** 中间滑动线的最底端位置*/private int slideBottom;/*** 扫描框中的中间线的宽度*/private static final int MIDDLE_LINE_WIDTH = 6;/*** 扫描框中的中间线的与扫描框左右的间隙*/private static final int MIDDLE_LINE_PADDING = 10;boolean isFirst;@Overridepublic void onDraw(Canvas canvas) {Rect frame = CameraManager.get().getFramingRect();if (frame == null) {return;}//初始化中间线滑动的最上边和最下边if (!isFirst) {isFirst = true;slideTop = frame.top;slideBottom = frame.bottom;}//获取屏幕的宽和高int width = canvas.getWidth();int height = canvas.getHeight();// Draw the exterior (i.e. outside the framing rect) darkened//画出扫描框外面的阴影部分paint.setColor(resultBitmap != null ? resultColor : maskColor);canvas.drawRect(0, 0, width, frame.top, paint);canvas.drawRect(0, frame.top, frame.left, frame.bottom + 1, paint);canvas.drawRect(frame.right + 1, frame.top, width, frame.bottom + 1, paint);canvas.drawRect(0, frame.bottom + 1, width, height, paint);if (resultBitmap != null) {// Draw the opaque result bitmap over the scanning rectanglepaint.setAlpha(OPAQUE);canvas.drawBitmap(resultBitmap, frame.left, frame.top, paint);} else {//绘制中间的线,每次刷新界面，中间的线往下移动SPEEN_DISTANCEpaint.setColor(laserColor);slideTop += SPEEN_DISTANCE;if (slideTop >= frame.bottom) {slideTop = frame.top;}canvas.drawRect(frame.left + 2, slideTop - 1, frame.right - 1, slideTop + 2, paint);// 画出四个角// Draw four cornerspaint.setColor(getResources().getColor(R.color.colorBillStatus1));// 左上角(top left corner)canvas.drawRect(frame.left, frame.top, frame.left + 35, frame.top + 8, paint);canvas.drawRect(frame.left, frame.top, frame.left + 8, frame.top + 35, paint);// 右上角(top right corner)canvas.drawRect(frame.right - 35, frame.top, frame.right, frame.top + 8, paint);canvas.drawRect(frame.right - 8, frame.top, frame.right, frame.top + 35, paint);// 左下角(Bottom left corner)canvas.drawRect(frame.left, frame.bottom - 8, frame.left + 35, frame.bottom, paint);canvas.drawRect(frame.left, frame.bottom - 35, frame.left + 8, frame.bottom, paint);// 右下角(Bottom right corner)canvas.drawRect(frame.right - 35, frame.bottom - 8, frame.right, frame.bottom, paint);canvas.drawRect(frame.right - 8, frame.bottom - 35, frame.right, frame.bottom, paint);Collection<ResultPoint> currentPossible = possibleResultPoints;Collection<ResultPoint> currentLast = lastPossibleResultPoints;if (currentPossible.isEmpty()) {lastPossibleResultPoints = null;} else {possibleResultPoints = new HashSet<ResultPoint>(5);lastPossibleResultPoints = currentPossible;paint.setAlpha(OPAQUE);paint.setColor(resultPointColor);for (ResultPoint point : currentPossible) {canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 6.0f, paint);}}if (currentLast != null) {paint.setAlpha(OPAQUE / 2);paint.setColor(resultPointColor);for (ResultPoint point : currentLast) {canvas.drawCircle(frame.left + point.getX(), frame.top + point.getY(), 3.0f, paint);}}// Request another update at the animation interval, but only repaint the laser line,// not the entire viewfinder mask.//只刷新扫描框的内容，其他地方不刷新postInvalidateDelayed(ANIMATION_DELAY, frame.left, frame.top, frame.right, frame.bottom);}}public void drawViewfinder() {resultBitmap = null;invalidate();}/*** Draw a bitmap with the result points highlighted instead of the live scanning display.** @param barcode An image of the decoded barcode.*/public void drawResultBitmap(Bitmap barcode) {resultBitmap = barcode;invalidate();}public void addPossibleResultPoint(ResultPoint point) {possibleResultPoints.add(point);}}

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