How to copy my files from one directory to another directory?

Question

I am working on Android. My requirement is that I have one directory with some files, later I downloaded some other files into another directory and my intention is to copy all

Answer 1

    void copyFile(File src, File dst) throws IOException {
       FileChannel inChannel = new FileInputStream(src).getChannel();
       FileChannel outChannel = new FileOutputStream(dst).getChannel();
       try {
          inChannel.transferTo(0, inChannel.size(), outChannel);
       } finally {
          if (inChannel != null)
             inChannel.close();
          if (outChannel != null)
             outChannel.close();
       }
    }

I can't remember where I found this, but it was from a useful article I used to backup a SQLite database.