gistfile1.txt

if (BuildConfig.VERSION_CODE > Build.VERSION_CODES.KITKAT) {
            Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
            startActivityForResult(intent, FILE_CODE);
        } else {
            Intent i = new Intent(getActivity(), FilePickerActivity.class);
            i.putExtra(FilePickerActivity.EXTRA_ALLOW_MULTIPLE, false);
            i.putExtra(FilePickerActivity.EXTRA_ALLOW_CREATE_DIR, false);
            i.putExtra(FilePickerActivity.EXTRA_MODE, FilePickerActivity.MODE_DIR);
            i.putExtra(FilePickerActivity.EXTRA_START_PATH, Environment.getExternalStorageDirectory().getPath());
            startActivityForResult(i, FILE_CODE);
        }