List<String> files = (List<String>) getArguments().getSerializable("file");
assert files != null;
fileName = files.get(0);//String fileName
fileName = fileName.replace("[", "");
fileName = fileName.replace("]", "");
remotePDFViewPager = new RemotePDFViewPager(getActivity(),
APIClient.FILE_URL + fileName, this);
pdfViewLinearLayout.setBackgroundColor(Color.BLACK);
我需要获取数组的第一项:[[file-1519428262786.pdf,Leistungen.pdf]],即file-1519428262786.pdf
List<ArrayList<String>> filesArray =
(List<ArrayList<String>>) getArguments().getSerializable("file");
ArrayList<String> nestedFile = filesArray.get(0);