Here below I have written code for copy file from sdcard and paste it to another place.

I do this by using InputStream and OutputStream classes. Your target file should exist before doing this task.

    // your sdcard
    String sdCardString = Environment.getExternalStorageDirectory().toString();

   //
    File sourceFile = new File (sdCard + "/abc.txt");

    // make sure your target location folder exists!
    File targetFile = new File (sdCard + "/NewFolder/abc.txt");

    // just to take note of the location sources
    Log.v(TAG, "sourceFile: " + sourceFile);
    Log.v(TAG, "targetFile: " + targetFile);

    try {

        // 1 = move the file, 2 = copy the file
        int choose = 2;

        // moving the file to another directory
        if(choose==1){

            if(sourceFile.renameTo(targetFile)){

System.out.println("successfully move file.")

         }else{


System.out.println("Move file failed.")

         }

        }

        // we will copy the file
        else{

            // make sure the target file exists

            if(sourceFile.exists()){

                InputStream inStream = new FileInputStream(sourceFile);
                OutputStream outStream = new FileOutputStream(targetFile);

                // Copy the bits from instream to outstream
                byte[] buf = new byte[1024];
                int length;

                while ((length = inStream.read(buf)) > 0) {
                    outStream.write(buf, 0, length);
                }

                inStream.close();
                outStream.close();
                System.out.println("successfully copy file.") 


            }else{

System.out.println("Copy file failed. Source file missing.")

            }

        }

    } catch (NullPointerException e) {
        e.printStackTrace();
    } catch (Exception e) {
        e.printStackTrace();
    }