ViewfinderView.java 文件源码

public void onDraw(Canvas canvas) {
    canvas.setDrawFilter(new PaintFlagsDrawFilter(0, 3));
    int W = canvas.getWidth();
    int H = canvas.getHeight();
    Rect frame = CameraManager.get().getFramingRect();
    if (frame != null) {
        drawCover(canvas, frame, W, H);
        if (this.resultBitmap != null) {
            canvas.drawBitmap(this.resultBitmap, (float) frame.left, (float) frame.top, this.paint);
            return;
        }
        drawScanningLine(canvas, frame);
        drawRectEdge(canvas, frame);
        this.paint.reset();
        postInvalidateDelayed(ANIMATION_DELAY);
    }
}