Hello everyone I hope yall good. I want to know how to create a button and when it get pressed display an image and a column or row.

Please help me.

**NOW THE IMAGE APPEARS AND DISSAPEARS WHEN THE BUTTON ITS PRESSED. But it dont refresh to get a new one (its a dynamic url)

***Now the image change when it pressed, but i dont know where i can put the button.

UPDATE CODE 4.0

import 'dart:typed_data';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'colors.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    var title = 'Web Images';
    return MaterialApp(
        theme: ThemeData(
          primarySwatch: primaryBlack,
          accentColor: Colors.white,
        ),
        debugShowCheckedModeBanner: false,
        home: Scaffold(
          appBar: AppBar(
            title: Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                Text(
                  ':(:',
                  style: TextStyle(fontWeight: FontWeight.bold),
                ),
                Text('FelizTriste'),
                Text(':(:', style: TextStyle(fontWeight: FontWeight.bold)),
              ],
            ),
          ),
          body: ForcePicRefresh(),
        ));
  }
}

class ForcePicRefresh extends StatefulWidget {
  @override
  _ForcePicRefreshState createState() => _ForcePicRefreshState();
}

class _ForcePicRefreshState extends State<ForcePicRefresh> {
  String url = 'http://thecatapi.com/api/images/get?format=src&type=gif';
  Widget _pic;

  @override
  void initState() {
    _pic = Center(
      child: Container(
          height: 350,
          width: 350,
          decoration:
              BoxDecoration(border: Border.all(color: Colors.black, width: 6)),
          child: Image.network(
            url,
            width: double.infinity,
            fit: BoxFit.fill,
          )),
    );

    super.initState();
  }

  _updateImgWidget() async {
    setState(() {
      _pic = Center(child: CircularProgressIndicator());
    });
    Uint8List bytes = (await NetworkAssetBundle(Uri.parse(url)).load(url))
        .buffer
        .asUint8List();
    setState(() {
      _pic = Center(
          child: Container(
              height: 350,
              width: 350,
              decoration: BoxDecoration(
                  border: Border.all(color: Colors.black, width: 6)),
              child: Image.memory(
                bytes,
                width: double.infinity,
                fit: BoxFit.fill,
              )));
      SizedBox(height: 200);
      ElevatedButton(onPressed: () {}, child: Text('Hola'));
    });
    SizedBox(height: 200);
    ElevatedButton(onPressed: () {}, child: Text('Hola'));
  }

  @override
  Widget build(BuildContext context) {
    return InkWell(
      child: _pic,
      onTap: () {
        _updateImgWidget();
      },
    );
  }
}

I tried to add a Container, for the purpose of reduce or increase the image so it can fit perfect, but i didnt work.

Also, the url its a dynamic one, so i want to "refresh" the image display with each button hope you can help me.

Going to learn this method: Flutter: refresh network image

CodePudding user response：

I have modified your code:

1. removed image function, instead create a variable, bool showImage which should be false initially.

2. When the button is pressed, showImage should be changed to true.

    ElevatedButton(
      onPressed: () {
        setState(() {
          showImage = true;
        });
      },
      child: Text('GATIT@S')
   ),
   

3. The image and text should only be displayed when showImage variable is true, otherwise display empty SizedBox().

    showImage
      ? Column(
          children: [
            Image.network(           'https://docs.flutter.dev/assets/images/dash/dash-fainting.gif'),
            Text('Hola')
          ],
        )
      : SizedBox(
          height: 0,
        ),