警报对话框未显示在片段内

Question

I have looked at numerous other threads regarding my problem and still can't find the answer. My alert dialog for some reason isn't being shown inside my fragment. Using the same code and modifying slightly, works fine inside an activity. Can anyone spot my mistake?

final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
final LayoutInflater layoutInflater = (LayoutInflater) getActivity().getBaseContext().getSystemService(LAYOUT_INFLATER_SERVICE);

View view = layoutInflater.inflate(R.layout.popup_update, null);
builder.setView(view);

builder.create();
TextView txtMessage = view.findViewById(R.id.txtMessage);
txtMessage.setText("SAVING");

final Dialog popupDialog = builder.show();
popupDialog.setCancelable(false);
popupDialog.setCanceledOnTouchOutside(false);

Answer 1

Change to

final LayoutInflater layoutInflater = getActivity().getLayoutInflator();
View view = layoutInflater.inflate(R.layout.popup_update, null);

AlertDialog alert = builder.create();
alert.show();

Answer 2

LayoutInflater layoutInflater = (LayoutInflater) getActivity().getBaseContext().getSystemService(LAYOUT_INFLATER_SERVICE);
View view = layoutInflater.inflate(R.layout.popup_update, null);
TextView txtMessage = view.findViewById(R.id.txtMessage);
txtMessage.setText("SAVING");

AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
.setView(view)
.setCancelable(false)
.setCanceledOnTouchOutside(false);

AlertDialog dialog = builder.create();
dialog.show();

Answer 3

View view = getActivity().getLayoutInflater().inflate(R.layout.popup_update, null);
            final Dialog popupDialog = new AlertDialog.Builder(getActivity())
                    .setView(view)
                    .setCancelable(false)
                    .create();
            TextView txtMessage = view.findViewById(R.id.txtMessage);
            txtMessage.setText("SAVING");
            popupDialog.show();

Answer 4

I solved my issue by using an Async task

class SaveTrainingTask extends AsyncTask<Void, Boolean, Boolean> {
        Dialog popupDialog;

        public SaveTrainingTask() {
            final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
            final LayoutInflater layoutInflater = (LayoutInflater) getActivity().getBaseContext().getSystemService(LAYOUT_INFLATER_SERVICE);

            View view = layoutInflater.inflate(R.layout.popup_update, null);
            TextView txtMessage = view.findViewById(R.id.txtMessage);
            txtMessage.setText("SAVING TRAINING");
            builder.setView(view);

            builder.create();

            popupDialog = builder.show();
            popupDialog.setCancelable(false);
            popupDialog.setCanceledOnTouchOutside(false);
        }

        protected Boolean doInBackground(Void... urls) {
            saveInspection();
            return true;
        }

        protected void onPostExecute(Boolean result) {
            super.onPostExecute(result);

            popupDialog.dismiss();

            if (result) {
                Toast.makeText(getContext(), "Successfully saved training.", Toast.LENGTH_SHORT).show();
                Intent intent = new Intent(getContext(), SelectEquipmentActivity.class);
                intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
                startActivity(intent);
                getActivity().finish();
            } else {
                Toast.makeText(getContext(), "Error saving training.", Toast.LENGTH_SHORT).show();
            }
        }
    }