我为那些需要它的人共享一个代码,用于为相机绘制SurfaceView的代码,由透明背景上的透明矩形和可选的alpha组成。
欢迎大家有更好的贡献:)
@Override
protected void onDraw(Canvas canvas) {
mAGPLog.e(this.getClass().getName() + ” – onDraw”);
canvas.drawColor(Color.argb(128, 224, 224, 224));
int margin = (int) getResources().getDimension(R.dimen.margin_camera);
int width = getWidth();
int height = getHeight();
mAGPLog.e(“width – ” + width + ” * height – ” + height);
int distance = width < height ? width – margin : height – margin;
paint.setColor(Color.CYAN);
paint.setStrokeWidth(strokerWidth);
paint.setStyle(Paint.Style.STROKE);
canvas.drawRect(
(width – distance) / 2, (height – distance) / 2, (width + distance) / 2, (height + distance) / 2, paint);
paint.setStyle(Paint.Style.FILL);
paint.setColor(Color.argb(0, 255, 255, 255));
paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
canvas.drawRect(
(width – distance) / 2 + strokerWidth, (height – distance) / 2 + strokerWidth, (width + distance) / 2 – strokerWidth, (height + distance) / 2 – strokerWidth, paint);
super.onDraw(canvas);
}