Flutter: Show data from RestAPI

Question

I am trying to show the data from database to Flutter. I am able to get the data but don't know how can i show it in Flutter. Single data i can show but getting hard time presenting multiple data.

I am using DIO plugin for HTTP requests.

Here is the code.

Future getData() async{

    try{  
      dtguid ='34';            
      var bodyss = { "uid" : dtgUid, "deviceid": deviceid};

      Response<Map> responsess =
          await Dio().post("http://192.168.100.4:8080/sampleapp/get-followingdata.php", data: bodyss,);
         Map responseBody = response.data;
        if(responseBodys['success'] == false){

           _showSnackBar(context,responseBody['errors']['inputuid'],Colors.redAccent);

          this.setState((){
            _inProcess = false;
          });

        }else{
          print(responseBody['success']);
          totalcount = responseBody['count'];
          this.setState((){

            _inProcess = false;
          });

        }

    }catch(e){
       print("Exception Caught: $e");
    }

  }

Here is the Widget where i need to show this data.

Expanded(
            child: Column(
              crossAxisAlignment: CrossAxisAlignment.start,
              children: <Widget>[
                Text(
               'Test',//  schoolLists[index]['name'],
                  style: TextStyle(
                      color: primary,
                      fontWeight: FontWeight.bold,
                      fontSize: 18),
                ),
                SizedBox(
                  height: 6,
                ),
                Row(
                  children: <Widget>[
                    Icon(
                      Icons.location_on,
                      color: secondary,
                      size: 20,
                    ),
                    SizedBox(
                      width: 5,
                    ),
                    Text(
                      'Earth',//schoolLists[index]['location'],
                        style: TextStyle(
                            color: primary, fontSize: 13, letterSpacing: .3)),
                  ],
                ),
                SizedBox(
                  height: 6,
                ),
                Row(
                  children: <Widget>[
                    Icon(
                      Icons.school,
                      color: secondary,
                      size: 20,
                    ),
                    SizedBox(
                      width: 5,
                    ),
                    Text(
                      'Some Data',
                      //schoolLists[index]['type'],
                        style: TextStyle(
                            color: primary, fontSize: 13, letterSpacing: .3)),
                  ],
                ),
              ],
            ),
          )

For testing purpose i tried with some hardcoded data schoolLists that is working but i don't know how can i show the data from http request.

Sample Data.

{"errors":[],
"content":[{"uid":34,"age":35,"name":"Test User 1","country":"India"},
{"uid":34,"age":37,"name":"Test User 2","country":"India"},
{"uid":34,"age":36,"name":"Test User 3","country":"India"}],
"success":true}

I need to show name and country to the widget. In place of this test value.

Text(
               'Test',//  schoolLists[index]['name'],
                  style: TextStyle(
                      color: primary,
                      fontWeight: FontWeight.bold,
                      fontSize: 18),
                ),

Later on i will try to work on Lazyload. Unfortunatly, i am not able to show the data so, didn't asked about the lazyload.

To be honest i am learning Flutter. I don't have much experience in it.

You can use FutureBuilder and then in the builder pass the widget you want to show. — Shubham Gupta
– Shubham Gupta, Commented May 23, 2020 at 13:38
@srikanth7785 Sorry for late reply. getData is being called during initstate. I can confirm i am getting the data. Just don't know how to show them in the widget. Like Name, Country etc. — Roxx
– Roxx, Commented May 23, 2020 at 14:02
@ShubhamGupta I am facing issue regarding passing the data to Widget. — Roxx
– Roxx, Commented May 23, 2020 at 14:03

Rida Rezzag · Accepted Answer · 2020-05-23 13:51:32Z

1

i dont see you decoding the body response data on top of your code first import

import 'dart:convert' as convert;

than in your function getData() decode the server JSON response like this

//get the json data decode it and store it in decodedResponse
var decodedResponse = convert.jsonDecode(response.body);

than map thru your decodedResponse as you want

answered May 23, 2020 at 13:51

Rida Rezzag

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7 Comments

Roxx Over a year ago

Thanks for the answer. I think decoding is not needed as DIO plugin handled those.

Roxx Over a year ago

can you put some code for this part. "than map thru your decodedResponse as you want" It will be helpful. I am facing issue actually in this part. voted up.

Roxx Over a year ago

I haven't created any listview widget. Do i need to create it? If yes, how?

Rida Rezzag Over a year ago

yes of course you need a list view to map thru the data you getting from your server i see you having only 3 objects (3 users) in your "content":[{ first Object},{ second Object},{ third object}] if you have more objects your list view will map thru every object and populate you users info

Rida Rezzag Over a year ago

check this example youtube.com/watch?v=TdWhYERuv7g&t=364s

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