Flutter Multiple Dynamic Dependent Dropdown List Using JSON REST API

Source code:

Buy Me a Coffee:

[korichaspaceexplore]

thank you so much man, , you helped me Alot, , was a project i got stacked with it for almost a week and now from your tutorial am okey

[rodnalcy]

If you have an error when you select again add this in the 'Select State':
onChanged: (String? newValue) {
setState(() {
_myCity = null;
citiesList = [];
_myState = newValue;
_getCitiesList();
print("myState");
print(_myState);
});
},

[beak]

for the first time it works fine but when i choose state & city for second time it shows error --
There should be exactly one item with [DropdownButton]'s value: 14.
Either zero or 2 or more [DropdownMenuItem]s were detected with the same value

[trends]

Thanks this is good. But a little bit of exception handling is not done. For example, If I select some state, city's dropdown will be enabled, I select city. And then change the country, It give error. Failed Assertion: Line 805 pos 15: 'items == null || items.isEmpty()

[nishithanasar]

Thank you so muchhh....was searching for this for past many days... thanks a lot

[petermakala]

Hi am having the issue bellow please help me

Unhandled Exception: type 'String' is not a subtype of type 'int' of 'index'

[yuktat.n]

Can you please tell me how to create a similar api for different country's states and cities.
Can you share the link of the api you have used.

[anjalihali]

i am not able to run this code with null safety, i am trying to run this code since 5 days but its not working, it will be very thankful, if u help me.i stuck on this point since 5 days. i getting error for this child: Text(item['STATE_NAME']),
value: item['STATE_CODE'], as The argument type 'String' can't be assigned to the parameter type 'int'.

[codeaxen]

hello have u tested this when u assign item[id] to value... it gives this Error There should be exactly one item with [DropdownButton]'s value,

but when i assign value: item[name ] it works perfectly . so my question is what did u mean by giving a value: item[id] ????

[sandyeffendi]

i am not change dropdown after change dropdown first
════════ Exception caught by widgets library
There should be exactly one item with [DropdownButton]'s value: 37.
Either zero or 2 or more [DropdownMenuItem]s were detected with the same value


Failed assertion: line 1543 pos 15: 'items == null || items.isEmpty || value == null ||
item) {
return item.value == value;
}).length == 1'

[rahulsingh-cdok]

Sir I have two get method api, I want to show 2 dependent drop down in flutter, Please help me.

[costimid]

Hi. Is an excelent tutorial. Give me an error if i change the value of first list. Maybe I have to clean the second list?

[soufeeljazouli]

thank u man this helpful video just a question is there any way to use hardcoded list instead of json ?

[ladej]

Hi, i've consumed an api and added the list of countries to the list box. However, i'm just wondering how can i add a default option as well as a tag saying "select country" to my drop down list using json which will prompt the user to click on the drop down list, no HTML?

[hudaansari]

Hello, Can you share the code by adding this code to another drop down list?

[anomanjeanjacquessika]

Hello dear friend, thank you for your great tutorial. I adapted your source code to my project but my concern is that when selecting a state that has no city, I have a bug. And it works when the state has cities. If you can help me with the php code. Thank you in advance.

[harshvardhansinghgaharwar]

How you can do this with flutter bloc please 🙏🙏🙏🙏🙏 let me knoe

[Its_Pritam_]

5:36 how to limit the height of that list, since it is taking entire screen

[CLY_-mjtg]

very good friend. In which page do I register my api key?

[mahmudidris]

Hello guys, please i want to get flutter dynamic dependent dropdown list using cloud firestore. Thank you