如何在 flutter 的下拉列表中添加删除选项

Question

I'm working in small project. For Login, I need to save URL in shared preferences so that next time user can select it in dropdown. I need to keep delete option in that dropdown to delete old URL. How to do?

code:

 if (getALLURL.isNotEmpty) ...[
                DropdownButton<String>(
                  value: baseurl.isNotEmpty ? baseurl : null,
                  borderRadius: BorderRadius.circular(2.0),
                  underline: SizedBox(),
                  focusColor: AppColors().linenDark,
                  elevation: 1,
                  enableFeedback: true,
                  isExpanded: true,
                  style: GoogleFonts.montserrat(
                      fontSize: AppSizes().paraLarge16,
                      color: AppColors().linenDark,
                      fontWeight: FontWeight.w400),
                  icon: Icon(
                    Icons.keyboard_arrow_down_rounded,
                    color: AppColors().linenMedium,
                  ),
                  items: getALLURL.map((String item) {
                    return DropdownMenuItem<String>(
                      child: Text(item),
                      value: item,
                    );
                  }).toList(),
                  onChanged: (value) async {
                    setState(() {
                      baseurl = value!;
                      print(baseurl);
                    });
                    await Prefs().setBaseURLLogin(baseurl);
                  },
                  hint: Text("Select item"),
                ),
                //IconButton(onPressed: onDelete, icon: Icon(Icons.delete))
              ],

Now I'm only used text in menuitems, how to add delete in it. Can I delete particular value in shared preferences

Answer 1

Can I delete particular value in shared preferences

Yes, you can write new value over the old one with same key.

Now I'm only used text in menuitems, how to add delete in it

i don't think it could support that directly. Even if it, i recommended you to use instead way for delete option such as any position of the screen.