java - Excelシートに画像を挿入できません

Question

こんにちは、次のコードを使用してAndroidのExcelに画像を挿入しようとしていますが、できません。助けてください!!

// オブジェクトのリストを外部ストレージに配置するパスを作成します //

               File file = new File(context.getExternalFilesDir(null), "abc.xls");
    FileOutputStream fileOS = null;
    //add picture data to this workbook.
    InputStream is = text.getResources().getAssets().open("images.jpg");
    byte[] bytes = IOUtils.toByteArray(is);
    int pictureIdx = wb.addPicture(bytes, Workbook.PICTURE_TYPE_JPEG);
    is.close();

    CreationHelper helper = wb.getCreationHelper();

    //create sheet
    Sheet sheet = wb.createSheet();

    // Create the drawing patriarch. This is the top level container for all shapes. 
    Drawing drawing = sheet.createDrawingPatriarch();

    //add a picture shape
    ClientAnchor anchor = helper.createClientAnchor();
    //set top-left corner of the picture,
    //subsequent call of Picture#resize() will operate relative to it
    anchor.setCol1(0);
    anchor.setRow1(0);
    Picture pict = drawing.createPicture(anchor, pictureIdx);

    //auto-size picture relative to its top-left corner
//  pict.resize();


//  if(wb instanceof XSSFWorkbook) file += "x";
    fileOS= new FileOutputStream(file);
    wb.write(fileOS);