View转图片，View可以是显示在屏幕的也可在后台

public static Bitmap convertViewToBitmap(View view){
      view.measure(MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
      view.layout(0, 0, view.getMeasuredWidth(), view.getMeasuredHeight());
      view.buildDrawingCache();
      Bitmap bitmap = view.getDrawingCache();
      return bitmap;
}

这是从 http://www.eoeandroid.com/blog-767797-39566.html?_dsign=7a0934cd 转载来的，直接上代码了。