public class AttachmentsFragment extends Fragment {

    private Button btncf;
    private TextView tvaf;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_attachments,container,false);

            if(Build.VERSION.SDK_INT > Build.VERSION_CODES.M && ActivityCompat.checkSelfPermission(getContext(),android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
                    != PackageManager.PERMISSION_GRANTED) {
                requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1001);
            }

            btncf = view.findViewById(R.id.btn_choose_files);
            tvaf = view.findViewById(R.id.tv_choose_files_placeholder);

            btncf.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    new MaterialFilePicker()
                            .withActivity(getActivity())
                            .withRequestCode(1000)
                            .withHiddenFiles(true) // Show hidden files and folders
                            .start();
                }
            });
        return view;
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

                startActivityForResult(data, requestCode);

            if (requestCode == 1000 && resultCode == RESULT_OK) {
                String filePath = data.getStringExtra(FilePickerActivity.RESULT_FILE_PATH);
                // Do anything with file
                tvaf.setText(filePath);
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        switch (requestCode) {
            case 1001: {
                if(grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    Toast.makeText(getActivity(), "Permission not granted!", Toast.LENGTH_SHORT).show();
                    isRemoving();
                }
            }
        }
    }
}