Android - 在DialogFragment中修改对话框

Question

我在DialogFragment中创建了以下类，它是ProgressDialog。问题是我想从其他片段更新对话框的进度。我怎么能这样做？谢谢

public class MaterialProgressDialogFragment extends DialogFragment {

private int total;
private MaterialDialog myDialog;

@NonNull
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    return myDialog;
}

public void incrementProgress(int by) {
    myDialog.incrementProgress(by);
}

public void setTotal(int total) {
    this.total = total;
}

public void setUp(Context context) {
    myDialog = new MaterialDialog.Builder(context)
            .title("Progreso")
            .content("Procesando las fotos seleccionadas...")
            .progress(false, total, true)
            .build();
}
}

然后在我的片段中：

    MaterialProgressDialogFragment dialogFragment = new MaterialProgressDialogFragment();
    dialogFragment.setTotal(100);
    dialogFragment.setUp(getActivity());
    dialogFragment.show(getActivity().getSupportFragmentManager(), "");
    dialogFragment.incrementProgress(50);

一切都按预期工作，直到我调用incrementProgress