安卓自定义view转换成bitmap

private Bitmap loadBitmapFromView(DotTagView view) {

int w = view.getTotalWidth();

int h = view.getTotalHeight();

Bitmap bmp =Bitmap.createBitmap(w,h,Bitmap.Config.ARGB_8888);

Canvas canvas =new Canvas(bmp);

view.layout(0,0,w,h);

view.draw(canvas);

return bmp;

}