android - 在 fragment 中显示 DialogFragment

Question

我一直在尝试在 Fragment 中显示 DialogFragment 但没有成功。这是我的代码:

@Override
public void onResume() {
    super.onResume();
    Log.d(TAG, "onResume");
    FirebaseUser user = FirebaseAuth.getInstance().getCurrentUser();
    if (user != null && !user.isEmailVerified()) {
        InfoDialogFragment dialog = new InfoDialogFragment();
        dialog.show(getActivity().getSupportFragmentManager(), "InfoDialogFragment");
    }
}

每当该 fragment 出现在屏幕上时，屏幕就会变暗，当我触摸屏幕时它会恢复正常对比度，但我看不到对话框 fragment 。我错过了什么？

这是 DialogFragment 的代码:

public class InfoDialogFragment extends DialogFragment {
private InfoDialogListener listener;

@Override
public void onAttach(Context activity) {
    super.onAttach(activity);
    // Verify that the host activity implements the callback interface
    try {
        // Instantiate the InfoDialogListener so we can send events to the host
        listener = (InfoDialogListener) activity;
    } catch (ClassCastException e) {
        // The activity doesn't implement the interface, throw exception
        throw new ClassCastException(activity.toString()
                + " must implement DeleteListListener");
    }
}

@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
    // Use the Builder class for convenient dialog construction
    AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
    // Get the layout inflater
    LayoutInflater inflater = getActivity().getLayoutInflater();
    View layout = inflater.inflate(R.layout.fragment_info, null);

    TextView message = (TextView) layout.findViewById(R.id.message);
    message.setText(getActivity().getString(R.string.user_not_verified));
    //
    Button ok = (Button) layout.findViewById(R.id.ok_button);
    ok.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            listener.onDialogOKClick(InfoDialogFragment.this);
        }
    });
    return builder.create();
}


public interface InfoDialogListener {
    void onDialogOKClick(DialogFragment dialog);

}

谢谢

Answer 1

使用 getChildFragmentManager 而不是 getActivity().getSupportFragmentManager()。这些是不同的实例。