在自定义对话框中显示 Toast 但无法读取上下文

Question

我正在尝试创建一个自定义对话框，当用户单击肯定按钮时它会显示祝酒词，但我在 Toast 行上遇到错误。问题是什么以及如何解决？我认为这与上下文有关。错误只是说：无法解析方法 'makeText(com.example.studentsacademicmanagementappsama.SubjectListDialog, java.lang.String, int)'

SubjectListDialog.java

public class SubjectListDialog extends AppCompatDialogFragment {
    private EditText et_subjectCode, et_subjectName, et_creditHour;
    @Override
    public Dialog onCreateDialog(Bundle savedInstanceState) {
        AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

        LayoutInflater inflater = getActivity().getLayoutInflater();
        View view = inflater.inflate(R.layout.layout_subjectlist_dialog, null);

        builder.setView(view)
                .setTitle("Add Subject")
                .setNegativeButton("cancel", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {

                    }
                })
                .setPositiveButton("confirm", new DialogInterface.OnClickListener() {
                    @Override
                    public void onClick(DialogInterface dialogInterface, int i) {
                        try {
                            SubjectListModel subjectListModel = new SubjectListModel(et_subjectCode.
                                    getText().toString(),et_subjectName.getText().toString(),
                                    Integer.parseInt(et_creditHour.getText().toString()));

                            Toast.makeText(SubjectListDialog.this, subjectListModel.toString(),
                                    Toast.LENGTH_SHORT).show();
                        }catch (Exception e){

                        }
                    }
                });
        et_subjectCode = view.findViewById(R.id.et_subjectCode);
        et_subjectName = view.findViewById(R.id.et_subjectName);
        et_creditHour = view.findViewById(R.id.et_creditHour);
        return builder.create();
    }
}

Answer 1

Toast.makeText(view.getContext(), subjectListModel.toString(), Toast.LENGTH_SHORT).show();

Answer 2

要传递的值是上下文。

您传递了错误的值，如果您传递了 'SubjectListDialog.this'，您传递的是 SubjectListDialog class 本身，而不是上下文。

Toast.makeText(requireContext(), subjectListModel.toString(),Toast.LENGTH_SHORT).show();

在自定义对话框中显示 Toast 但无法读取上下文

Display Toast in custom dialog but context cannot be read

android

dialog

toast

customdialog