// 获取ScrollView 实际高度
 h = 0;
 for (int i = 0; i < scrollView.getChildCount(); i++) {
  h += scrollView.getChildAt(i).getHeight();
  scrollView.getChildAt(i).setBackgroundResource(android.R.color.white);
 }
 // 创建对应大小的bitmap
 Bitmap bitmap = Bitmap.createBitmap(scrollView.getWidth(), h, Bitmap.Config.ARGB_8888);
 Canvas canvas = new Canvas(bitmap);
 scrollView.draw(canvas);

// BitmapFactory.decodeResource函数直接转换资源文件为Bitmap 

 Bitmap head = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.share_term_table_header);
 Bitmap foot = BitmapFactory.decodeResource(mContext.getResources(), R.drawable.share_term_table_footer);

if (head == null) {
  return null;
 }
 int headWidth = head.getWidth();
 int kebianwidth = kebiao.getWidth();
 int fotwid = san.getWidth();

 int headHeight = head.getHeight();
 int kebiaoheight = kebiao.getHeight();
 int footerheight = san.getHeight();
 //生成三个图片合并大小的Bitmap
 Bitmap newbmp = Bitmap.createBitmap(kebianwidth, headHeight + kebiaoheight + footerheight, Bitmap.Config.ARGB_8888);
 Canvas cv = new Canvas(newbmp);
 cv.drawBitmap(head, 0, 0, null);// 在 0，0坐标开始画入headBitmap

 //因为手机不同图片的大小的可能小了 就绘制白色的界面填充剩下的界面
 if (headWidth < kebianwidth) {
  System.out.println("绘制头");
  Bitmap ne = Bitmap.createBitmap(kebianwidth - headWidth, headHeight, Bitmap.Config.ARGB_8888);
  Canvas canvas = new Canvas(ne);
  canvas.drawColor(Color.WHITE);
  cv.drawBitmap(ne, headWidth, 0, null);
 }
 cv.drawBitmap(kebiao, 0, headHeight, null);// 在 0，headHeight坐标开始填充课表的Bitmap
 cv.drawBitmap(san, 0, headHeight + kebiaoheight, null);// 在 0，headHeight + kebiaoheight坐标开始填充课表的Bitmap
 //因为手机不同图片的大小的可能小了 就绘制白色的界面填充剩下的界面
 if (fotwid < kebianwidth) {
  System.out.println("绘制");
  Bitmap ne = Bitmap.createBitmap(kebianwidth - fotwid, footerheight, Bitmap.Config.ARGB_8888);
  Canvas canvas = new Canvas(ne);
  canvas.drawColor(Color.WHITE);
  cv.drawBitmap(ne, fotwid, headHeight + kebiaoheight, null);
 }
 cv.save(Canvas.ALL_SAVE_FLAG);// 保存
 cv.restore();// 存储
 //回收
 head.recycle();
 kebiao.recycle();
 san.recycle();