News pages doesn't show article or blogs after building apk - flutter

Question

I'm creating a flutter project on which it consist of news feature sadly after building an apk and installing it to try in become an empty screen with grey shade, i also try to test it on my phone and this is what happen i dont know where the bugs came from.. please help me
here's the code
import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';
import 'package:google_mobile_ads/google_mobile_ads.dart';
import 'Article_View.dart';
import 'News_Categories.dart';
import 'helper/Data.dart';
import 'helper/News.dart';
import 'model/Article_Model.dart';
import 'model/CategoryModel.dart';
class NewsHomePage extends StatefulWidget {
#override
_NewsHomePageState createState() => _NewsHomePageState();
}
class _NewsHomePageState extends State<NewsHomePage> {
List<CategoryModel> categories = <CategoryModel>[];
List<ArticleModel> articles = <ArticleModel>[];
bool _loading = true;
//bannerads
late BannerAd _bannerads;
bool _isAdsLoaded = false ;
#override
void initState() {
// TODO: implement initState
super.initState();
categories = getCategories();
getNews();
_initBannerAds();
}
getNews() async {
News newsClass = News();
await newsClass.getNews();
articles = newsClass.news;
setState(() {
_loading = false;
});
}
_initBannerAds(){
_bannerads = BannerAd(
size: AdSize.banner,
// ignore: deprecated_member_use
adUnitId: "ca-app-pub-8634651641429291/4830511818",
listener: BannerAdListener(
onAdLoaded: (ad){
setState(() {
_isAdsLoaded =true;
});
},
onAdFailedToLoad: (ad,error){}
),
request: const AdRequest()
);
_bannerads.load();
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
backgroundColor: Colors.green,
elevation: 0.0,
title: Row(
mainAxisAlignment: MainAxisAlignment.center,
children: const [
Text('Stock '),
Text(
'News',
style: TextStyle(
color: Colors.black54,
),
),
],
),
centerTitle:true,
bottom: const PreferredSize(
preferredSize: Size.zero,
child: Text("Powered by news.org")),
),
body: _loading
? Container(
child: const Center(
child: CircularProgressIndicator(),
),
)
: SingleChildScrollView(
child: Container(
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
///Categories
Container(
padding: const EdgeInsets.symmetric(horizontal: 22.0),
height: 90.0,
child: Expanded(
child: ListView.builder(
itemCount: categories.length,
scrollDirection: Axis.horizontal,
shrinkWrap: true,
itemBuilder: (context, index) {
return CategoryTile(
imageUrl: categories[index].imageAssetUrl,
categoryName: categories[index].categoryName,
);
}),
),
),
///Blogs
Container(
padding: const EdgeInsets.only(top: 16.0),
child: Expanded(
child: ListView.builder(
physics: const ClampingScrollPhysics(),
shrinkWrap: true,
itemCount: articles.length,
itemBuilder: (context, index) {
return BlogTile(
imageURL: articles[index].urlToImage,
title: articles[index].title,
desc: articles[index].description,
url: articles[index].url,
);
},
),
),
),
],
),
),
),
bottomNavigationBar: _isAdsLoaded?SizedBox(
height: _bannerads.size.height.toDouble(),
width: _bannerads.size.width.toDouble(),
child: AdWidget(ad: _bannerads),
)
:const SizedBox(),
);
}
}
class CategoryTile extends StatelessWidget {
final String imageUrl, categoryName;
const CategoryTile({required this.imageUrl, required this.categoryName});
#override
Widget build(BuildContext context) {
return GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => CategoryNews(
category: categoryName.toLowerCase(),
),
),
);
},
child: Container(
margin: EdgeInsets.only(right: 10.0),
child: Stack(
children: [
ClipRRect(
borderRadius: BorderRadius.circular(6),
child: imageUrl != null
? CachedNetworkImage(
imageUrl: imageUrl,
width: 120,
height: 60.0,
fit: BoxFit.cover,
)
: Image.network(
imageUrl,
width: 120.0,
height: 60.0,
fit: BoxFit.cover,
),
),
Container(
alignment: Alignment.center,
decoration: BoxDecoration(
color: Colors.black26,
borderRadius: BorderRadius.circular(6),
),
width: 120,
height: 60.0,
child: Text(
categoryName,
style: TextStyle(
color: Colors.white,
fontWeight: FontWeight.w500,
fontSize: 18.0,
),
),
),
],
),
),
);
}
}
class BlogTile extends StatelessWidget {
final String imageURL, title, desc, url;
BlogTile(
{required this.imageURL,
required this.title,
required this.desc,
required this.url});
#override
Widget build(BuildContext context) {
return GestureDetector(
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => ArticleView(
blogUrl: url,
)),
);
},
child: Container(
margin: const EdgeInsets.only(bottom: 16.0, left: 10.0, right: 10.0),
child: Column(
mainAxisSize: MainAxisSize.min,
children: [
ClipRRect(
borderRadius: BorderRadius.circular(6.0),
child: imageURL != null
? CachedNetworkImage(
imageUrl: imageURL,
)
: Image.network(imageURL),
),
const SizedBox(
height: 8.0,
),
Text(
title,
style: const TextStyle(
//color: Colors.black87,
fontSize: 17.0,
fontWeight: FontWeight.w500,
),
),
const SizedBox(
height: 8.0,
),
Text(
desc,
style: const TextStyle(
//color: Colors.black54,
),
),
],
),
),
);
}
}
and here's the screen shots of the app
[![debugging app][1]][1]
[![build app][2]][2]
[1]: https://i.stack.imgur.com/tvBsG.jpg
[2]: https://i.stack.imgur.com/wOuxS.jpg

Answer 1

Check if this line exists in android/app/src/main/AndroidManifest.xml file. If it doesn't add it right below the package name line. This will grant the app INTERNET permission so it can access it & display the data from the internet.
<uses-permission android:name="android.permission.INTERNET"/>
Flutter by default only adds the INTERNET permission in debug mode. When you build an APK in release mode, you have to explicitly add the permission by including the above line.
More info here.