onActivityResult()

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        String selectedFileAbsolutePath = null;
        if(data != null){
            selectedFileAbsolutePath = data.getStringExtra(SimpleFileExplorerActivity.ON_ACTIVITY_RESULT_KEY);
        }
        Toast.makeText(this, selectedFileAbsolutePath, Toast.LENGTH_LONG).show();
    }