安卓-如何从MainActivity启动自定义DialogPreference？

// 自定义Preference类
public class CustomDialogPreference extends DialogPreference {
    public CustomDialogPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    @Override
    protected View onCreateDialogView() {
        LayoutInflater inflater = LayoutInflater.from(getContext());
        View view = inflater.inflate(R.layout.custom_dialog_layout, null);
        // 在这里可以对自定义对话框的视图进行初始化和设置
        return view;
    }
}

// MainActivity中启动自定义DialogPreference
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 获取自定义Preference对象
        CustomDialogPreference customDialogPreference = (CustomDialogPreference) PreferenceManager.getDefaultSharedPreferences(this)
                .findPreference("custom_dialog_preference_key");

        // 获取对话框对象并显示
        Dialog dialog = customDialogPreference.getDialog();
        if (dialog != null) {
            dialog.show();
        }
    }
}