Extraer base de datos

gistfile1.java

Button botonExtraer = (Button) findViewById(R.id.boton_extraer);
        botonExtraer.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                String timeStamp = new SimpleDateFormat("ddMMyyyy_HHmmss").format(new Date());
                final String inFileName = "/data/data/com.app.mx.registro/databases/registro";

                File dbFile = new File(inFileName);



                FileInputStream fis = null;

                try {
                    fis = new FileInputStream(dbFile);
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                }

                String directorio = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString()+"/BASE_DE_DATOS_APP_REGISTRO/";
                Log.e("ruta:", "" + directorio);
                File d = new File(directorio);
                if (!d.exists()) {
                    d.mkdir();
                }
                String outFileName = directorio + "registro_"+timeStamp+".sqlite";

                OutputStream output = null;
                try {
                    output = new FileOutputStream(outFileName);
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                }

                byte[] buffer = new byte[1024];
                int length;
                try {
                    while ((length = fis.read(buffer)) > 0) {
                        output.write(buffer, 0, length);
                    }
                    output.flush();
                    output.close();
                    fis.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }finally {
                    Intent enviarArchivo = new Intent();
                    File outFile=new File(outFileName);
                    enviarArchivo.setAction(Intent.ACTION_SEND);
                    enviarArchivo.setType("text/plain");
                    enviarArchivo.putExtra(Intent.EXTRA_STREAM, Uri.fromFile(outFile));
                    startActivity(enviarArchivo);

                }


            }
        });