将pdf从下载移动到外部存储文件夹

Question

我需要移动并重命名pdf文件。

我正在使用文件选择器来选择似乎有效的pdf：

File selected = new File(fileList.get(position));    
String myFileString = selected.toString();

这为我提供了一个现有文件的字符串，例如：＆＃34; /storage/emulated/0/Download/myPdf.pdf"

下一步是尝试将文件重命名并复制到我设置的名为tsp的文件夹中：

String myRenamedPdf= "myRenamedPdf.pdf";

File fromLocation = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + myFileString);
File toLocation = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/tsp/" + MyRenamedPdf);

    FileInputStream inStream = new FileInputStream(fromLocation);
    FileOutputStream outStream = new FileOutputStream(toLocation);
    FileChannel inChannel = inStream.getChannel();
    FileChannel outChannel = outStream.getChannel();
    inChannel.transferTo(0, inChannel.size(), outChannel);
    inStream.close();
    outStream.close();

当我检查时，新文件不存在。有人可以帮帮我吗？