在主活动是一个 Jmeter 板，有tablayout和viewpager，并有图标菜单点击和工作良好，但问题是当显示对话框内的片段。如果显示对话框不在片段（正常活动）的代码工作良好，但我的代码不工作在片段内。我尝试了许多建议，从这个论坛，但仍然不知道如何解决这个问题。
下面是我的Fragment的代码：

import androidx.fragment.app.Fragment;
import androidx.fragment.app.FragmentManager;

public class ScanTabFragment extends Fragment implements View.OnClickListener, ProjectDialogActivity.DialogListener{

private CardView cardViewCreateProjectBatch;
private View view;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment

        view = inflater.inflate(R.layout.fragment_scan_tab, container, false);
        cardViewCreateProjectBatch = view.findViewById(R.id.cardViewCreateProjectBatch);
        cardViewCreateProjectBatch.setOnClickListener(this);

        return view;

    }

    @Override
    public void onClick(View view) {
        Intent i;

        switch (view.getId()) {
                case R.id.cardViewCreateProjectBatch:
                newProjectDialog();
                break;
        }
    }

 private void newProjectDialog() {
     

        String projectNameAuto;
        projectNameAuto = "PJ-Batch-" + android.text.format.DateFormat.format("yyyy.MM.dd.kk.mm.ss", new java.util.Date());
        FragmentManager fm = getSupportFragmentManager(); //this not working in fragment but working in normal activity (not fragment) and i have tried other code like this below but app crashed and dialog not show
        
        //FragmentManager fm = getActivity().getSupportFragmentManager();
        //FragmentManager fm = getActivity().getSupportFragmentManager();
        //FragmentManager fm = this.getParentFragment().getChildFragmentManager();
        //FragmentManager fm = this.getParentFragment().getFragmentManager();
        //FragmentManager fm = this.getParentFragment().getFragmentManager().beginTransaction();
        //FragmentManager fm = this.getChildFragmentManager();
        //FragmentManager fm = getFragmentManager();
        //FragmentManager fm = getParentFragment();

        ProjectDialogActivity alertDialog = ProjectDialogActivity.newInstance("Create New Batch Project", projectNameAuto, "");
        alertDialog.setCancelable(false);
        alertDialog.show(fm, "fragment_alert");

        ProjectDialogActivity alertDialog = ProjectDialogActivity.newInstance("Create New Batch Project", projectNameAuto, "");
        alertDialog.setCancelable(false);
        alertDialog.show(fm, "fragment_alert");
        }

public long insertProject1(String project_name, String created_date, Integer status, String notes) {

        mySQLiteAdapterBatch = new DatabaseHelperBatch(view.getContext());
        SQLiteDatabase db = mySQLiteAdapterBatch.getWritableDatabase();

        ContentValues contentValues = new ContentValues();
        contentValues.put("project_name", project_name);
        contentValues.put("created_date", created_date);
        contentValues.put("status", status);
        contentValues.put("notes", notes);

        return db.insert("project1", null, contentValues);
    }

public long insertProject2(String project_name, String created_date, Integer status, String notes) {

        mySQLiteAdapterBatch = new DatabaseHelperBatch(view.getContext());
        SQLiteDatabase db = mySQLiteAdapterBatch.getWritableDatabase();

        ContentValues contentValues = new ContentValues();
        contentValues.put("project_name", project_name);
        contentValues.put("created_date", created_date);
        contentValues.put("status", status);
        contentValues.put("notes", notes);

        return db.insert("project2", null, contentValues);
    }

 @Override
    public void applyTexts(String project_name, String created_date, Integer status, String notes) {
        if (ProjectDialogActivity.radioButtonProject1.isChecked() == true) {
            insertProject1(project_name, created_date, status, notes);
            Toast.makeText(view.getContext(), "New Batch project1 has been created", Toast.LENGTH_LONG).show();
            ;
        }

        if (ProjectDialogActivity.radioButtonProject2.isChecked() == true) {
            insertProject2(project_name, created_date, status, notes);
            Toast.makeText(view.getContext(), "New Batch project2 has been created", Toast.LENGTH_LONG).show();
        }

    }
}

下面是对话框片段的代码：

import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.TextView;
import android.widget.Toast;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatDialogFragment;
public class ProjectDialogActivity extends AppCompatDialogFragment {
    //Variables
    private String projectName;
    private String projectCreated;
    private String projectNotes;
    private Integer projectStatus;

    private TextView textViewProjectName;
    private TextView textViewNotes;

    public static RadioButton radioButtonProject1;
    public static RadioButton radioButtonProject2;

    public static ProjectDialogActivity newInstance(String title, String getProjectName, String getNotes) {
        ProjectDialogActivity frag = new ProjectDialogActivity();
        Bundle args = new Bundle();
        args.putString("title", title);
        args.putString("inputProjectName", getProjectName);
        args.putString("inputNotes", getNotes);
        frag.setArguments(args);
        return frag;
    }

    private ProjectDialogActivity.DialogListener listener;
    //private EditText editTextRack;

    @NonNull
    @Override
    public Dialog onCreateDialog(@Nullable Bundle savedInstanceState) {
        String title = getArguments().getString("title");
        String inputProjectName = getArguments().getString("inputProjectName");
        String inputNotes = getArguments().getString("inputNotes");

        final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
        LayoutInflater inflater = getActivity().getLayoutInflater();
        final View view = inflater.inflate(R.layout.activity_projectdialog, null);

        radioButtonProject1 = view.findViewById(R.id.radioButtonScan1);
        radioButtonProject2 = view.findViewById(R.id.radioButtonScan2);

        textViewProjectName = view.findViewById(R.id.editTextProjectName);
        textViewNotes = view.findViewById(R.id.editTextNotes);

        textViewProjectName.setSingleLine(true);
        textViewNotes.setSingleLine(true);

        textViewProjectName.setText(inputProjectName);
        textViewNotes.setText(inputNotes);

        projectName = textViewProjectName.getText().toString();

        builder.setView(view)
                .setTitle(title)
                //.setView(input)
                .setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialoginterface, int i) {
                        dialoginterface.cancel();
                    }
                })
                .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialog, int which) {
                        //String Rack = editTextRack.getText().toString();
                        //String projectName = textProject.getText().toString();

                        ////listener.applyTexts(textProject.getText().toString(), itemfrloc, itemtoloc, textNotes.getText().toString());

                        //String answer="OK";
                        //listener.applyOK_insert(answer);

                    }
                });
        return builder.create();

    }

    @Override
    public void onResume() {
        super.onResume();
        final AlertDialog d = (AlertDialog) getDialog();
        if (d != null) {
            Button positiveButton = (Button) d.getButton(Dialog.BUTTON_POSITIVE);
            positiveButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    projectName = textViewProjectName.getText().toString();
                    projectCreated = java.text.DateFormat.getDateTimeInstance().format(Calendar.getInstance().getTime());
                    projectStatus = 0;
                    projectNotes = textViewNotes.getText().toString();
                    Boolean wantToCloseDialog;
                    //Do stuff, possibly set wantToCloseDialog to true then...
                    if (projectName.isEmpty()) {
                        Toast.makeText(getContext(), "Cannot left blank, Please input your project name", Toast.LENGTH_LONG).show();
                        textViewProjectName.requestFocus();
                        wantToCloseDialog = false;
                    } else {
                        wantToCloseDialog = true;
                    }

                    if (wantToCloseDialog == true) {
                        listener.applyTexts(projectName, projectCreated, projectStatus, projectNotes);
                        d.dismiss();
                    }
                    //else dialog stays open. Make sure you have an obvious way to close the dialog especially if you set cancellable to false.
                }
            });
        }
    }

    @Override
    public void onAttach(@NonNull Context context) {
        super.onAttach(context);
        try {
            listener = (ProjectDialogActivity.DialogListener) context;
        } catch (ClassCastException e) {
            throw new ClassCastException(context.toString() + " must implement DialogListener");
        }
    }

    public interface DialogListener {
        // This is called when the dialog is completed and the results have been passed
        void applyTexts(String project_name, String created_date, Integer status, String Notes);
    }
}