public Bitmap convertViewToBitmap(View view){
    Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(),
        Bitmap.Config.ARGB_8888);
    //利用bitmap生成画布
    Canvas canvas = new Canvas(bitmap);
    //把view中的内容绘制在画布上
    view.draw(canvas);
  return bitmap;
}

/**
* save view as a bitmap
*/
private Bitmap saveViewBitmap(View view) {
// get current view bitmap
  view.setDrawingCacheEnabled(true);
  view.buildDrawingCache(true);
  Bitmap bitmap = view.getDrawingCache(true);
  Bitmap bmp = duplicateBitmap(bitmap);
  if (bitmap != null && !bitmap.isRecycled()) { bitmap.recycle(); bitmap = null; }
  // clear the cache
  view.setDrawingCacheEnabled(false);
  return bmp;
}
public static Bitmap duplicateBitmap(Bitmap bmpSrc)
{
  if (null == bmpSrc)
    { return null; }
  int bmpSrcWidth = bmpSrc.getWidth();
  int bmpSrcHeight = bmpSrc.getHeight();
  Bitmap bmpDest = Bitmap.createBitmap(bmpSrcWidth, bmpSrcHeight, Config.ARGB_8888); if (null != bmpDest) { Canvas canvas = new Canvas(bmpDest); final Rect rect = new Rect(0, 0, bmpSrcWidth, bmpSrcHeight);
  canvas.drawBitmap(bmpSrc, rect, rect, null); }
  return bmpDest;
}