Я пытаюсь реализовать диалог во фрагменте, но он показывает ошибку, что активность не может быть приведена

Question

profilefragment это мой класс фрагмента, в котором я пытаюсь реализовать настраиваемое диалоговое окно

    public class profileFragment extends Fragment implements 
   dialog.Dialoglistner {
        String path;
        Uri imageUri;
        ImageView img;
        ImageButton save;
        private static final int PICK_IMAGE = 100;
        TextInputEditText email, add, pswd, phone, name;

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                                 Bundle savedInstanceState) {

            final View view = inflater.inflate(R.layout.fragment_profile, 
   container, false);
            pswd = (TextInputEditText) view.findViewById(R.id.prof_pswd);
            phone = (TextInputEditText) view.findViewById(R.id.prof_phone);
            img = (ImageView) view.findViewById(R.id.profile);
            save = (ImageButton) view.findViewById(R.id.save);


            save.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    savedata();
                }
            });
            img.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    Intent gallery = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI);
                    startActivityForResult(gallery, PICK_IMAGE);

                }
            });


            pswd.setOnFocusChangeListener(new View.OnFocusChangeListener() {
                @Override
                public void onFocusChange(View v, boolean hasFocus) {


//calling dialog class         
       dialog dialogbox = new dialog();

   dialogbox.show(getActivity().getSupportFragmentManager(), "Custom Dialog"); 
                }
            });
            return view;
        }

        @Override
        public void applyText(String s1, String s2) {

            pswd.setText(s2);
        }
    }

Класс диалога

    public class dialog extends AppCompatDialogFragment {

        private Dialoglistner Listner;

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            final EditText old, newpass, repass;
            AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
            LayoutInflater inflater = getActivity().getLayoutInflater();
            View view = inflater.inflate(R.layout.dialog_layout, null);

            old = (EditText) view.findViewById(R.id.OldPass);
            newpass = (EditText) view.findViewById(R.id.NewPass);
            repass = (EditText) view.findViewById(R.id.RePass);


            builder.setView(view)
                    .setTitle("Change Password")
                    .setPositiveButton("Save", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            String s1, s2, s3;
                            s1 = old.getText().toString();
                            s2 = newpass.getText().toString();
                            s3 = repass.getText().toString();
                            if (s2.compareTo(s3) == 0) {
                                Listner.applyText(s1, s2);
                                Toast toast = Toast.makeText(getActivity(), "Password Updated", Toast.LENGTH_SHORT);
                                toast.show();

                            } else {

                                Toast toast = Toast.makeText(getActivity(), 
   " Password did not match, please try again", Toast.LENGTH_SHORT);

                                toast.show();

                            }


                        }
                    });

            return builder.create();

        }

        @Override
        public void onAttach(Context context) {
            super.onAttach(context);

ошибка в этой строке

com.example.rachitshah.volunteer.Main2Activity не может быть приведен к com.example.rachitshah.volunteer.dialog $ Dialoglistner на com.example.rachitshah.volunteer.dialog.onAttach (dialog.java:70)

Listner = (Dialoglistner) контекст;}

        public interface Dialoglistner {
            void applyText(String s1, String s2);

        }
    }

Answer 1

Почему вы создаете класс диалога, удалите их:

dialog dialogbox = new dialog();

   dialogbox.show(getActivity().getSupportFragmentManager(), "Custom Dialog");

и класс диалога, и этот

implements 
   dialog.Dialoglistner

просто используйте это:

 final EditText old, newpass, repass;
            Dialog dialog=new Dialog(getActivity());
            dialog.setContentView(R.layout.dialog_layout);

            old = (EditText) dialog.findViewById(R.id.OldPass);
            newpass = (EditText) dialog.findViewById(R.id.NewPass);
            repass = (EditText) dialog.findViewById(R.id.RePass);

            Button btnChangePassword=dialog.findViewById(R.id.btnChangePassword);

            btnChangePassword.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    String s1, s2, s3;
                    s1 = old.getText().toString();
                    s2 = newpass.getText().toString();
                    s3 = repass.getText().toString();
                    if (s2.compareTo(s3) == 0) {
                        //Listner.applyText(s1, s2);
                        Toast toast = Toast.makeText(getActivity(), "Password Updated", Toast.LENGTH_SHORT);
                        toast.show();

                    } else {

                        Toast toast = Toast.makeText(getActivity(),
                                " Password did not match, please try again", Toast.LENGTH_SHORT);

                        toast.show();

                    }

                }
            });
            dialog.show();