如何将 PDF 文件上传到 Parse 服务器？

Question

我需要帮助在 android Studio 中使用 JAVA 将 pdf 文件上传到解析服务器。

我尝试使用以下代码：

private ParseObject uploadPDFToParse(File PDFFile, ParseObject po, String columnName){

    if(PDFFile != null){

        Log.d("EB", "PDFFile is not NULL: " + PDFFile.toString());

        ByteArrayOutputStream out = new ByteArrayOutputStream();

        BufferedInputStream in = null;

        try {

            in = new BufferedInputStream(new FileInputStream(PDFFile));

        } catch (FileNotFoundException e) {

            e.printStackTrace();

        }

        int read;

        byte[] buff = new byte[1024];

        try {

            while ((read = in.read(buff)) > 0)

            {

                out.write(buff, 0, read);

            }

        } catch (IOException e) {

            e.printStackTrace();

        }

        try {

            out.flush();

        } catch (IOException e) {

            e.printStackTrace();

        }

        byte[] pdfBytes = out.toByteArray();

        // Create the ParseFile

        ParseFile file = new ParseFile(PDFFile.getName() , pdfBytes);

        po.put(columnName, file);

        // Upload the file into Parse Cloud

        file.saveInBackground();

        po.saveInBackground();

    }

    return po;

}

Answer 1

尝试以下代码并让我知道：private ParseObject uploadPDFToParse(File PDFFile, ParseObject po, String columnName){    if(PDFFile != null){        Log.d("EB", "PDFFile is not NULL: " + PDFFile.toString());        int size = (int) file.length();        byte[] pdfBytes = new byte[size];        try {            BufferedInputStream buf = new BufferedInputStream(new FileInputStream(file));            buf.read(pdfBytes, 0, pdfBytes.length);            buf.close();        } catch (FileNotFoundException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }        // Create the ParseFile        ParseFile file = new ParseFile(PDFFile.getName() , pdfBytes);        po.put(columnName, file);        // Upload the file into Parse Cloud        file.save();        po.saveInBackground();    }    return po;}