I want to show CachedNetworkImage in CircleAvatar Widget but backgroundImage parameter require ImageProvider.
Use CachedNetworkImageProvider
Creates an ImageProvider which loads an image from the url, using the
scale. When the image fails to load errorListener is called.
If what you want is just a circle-shaped CachedNetworkImage, you can use ClipOval:
ClipOval(
child: CachedNetworkImage(
width: 32,
height: 32,
fit: BoxFit.cover,
imageUrl: 'BLA.jpg',
placeholder: CircularProgressIndicator(),
),
),
please use imageBuilder from CachedNetworkImage
CachedNetworkImage(
placeholder: (context, url) => CircularProgressIndicator(),
errorWidget: (context, url, error) => new Icon(Icons.error),
fit: BoxFit.contain,
imageUrl: imagePath,
imageBuilder: (context, imageProvider) { // you can access to imageProvider
return CircleAvatar( // or any widget that use imageProvider like (PhotoView)
backgroundImage: imageProvider,
);
},
)
If your intention is to show the image inside a circular.
Use:
ClipRRect(borderRadius: BorderRadius.circular(100),
child: CachedNetworkImage(...))
If you want to convert the CachedNetworkImage into ImageProvider
Use:
CachedNetworkImageProvider(url)
Related
I am not able to show a circular loading indicator or an image while flutter is loading the image from the network.
image: DecorationImage(
image: NetworkImage(
Juegos_de_siempre[index].url_foto,
),
fit: BoxFit.fill,
),
Flutter's documentation suggested the usage of FadeInImage for the placeholder functionality. Here's a link to an example on Flutter's documentation.
You cannot use FadeInImage inside a DecorationImage, so you have to wrap it inside a Stack instead like shown in this thread.
Use CacheNetworkImage Package.Click here.
This is sample code.
CachedNetworkImage(
width: 100,
height: 100,
fit: BoxFit.cover,
imageUrl: imageUrl,
placeholder: (context, url) => const Center(
child: CupertinoActivityIndicator(),
), // replace with your asset image
errorWidget: (context, url, error) =>
const Icon(Icons.error),
),
Hello I have multiple images.
I want change the opacity of the image with the imageUrl.
My goal is that when user click on a image, it change his opacity.
My question is how to change the opacity while keeping the image ?
My CachedNetworkImage :
CachedNetworkImage(
imageUrl : _getImageUrl(),
width: MediaQuery.of(context).size.width,
height: MediaQuery.of(context).size.height,
fit: BoxFit.cover,
placeholder: (context, url) => const Center(child: CircularProgressIndicator()),
errorWidget: (context, exception, stacktrace)
{
return const Icon(Icons.warning);
},
)
You can wrap CachedNetworkImage with Opacity widget and provide opacity:x based on your need.
double _opacity =.3;
......
Opacity(
opacity: _opacity.
child:CachedNetworkImage(...)
More about Opacity.
Is there any way to handle image url that not containt an image by using CachedNetworkImage package?
This is my code and when I do images loading, these errors are always popping up
CachedNetworkImage(
imageUrl: imageUrl,
placeholder: (context, url) => Center(
child: CircularProgressIndicator(
color: Theme.of(context).accentColor)),
errorWidget: (context, url, error) => BookErrorImage(),
fit: BoxFit.cover,
),
[]
I've just implemented the Flutter package cached_network_image and I wonder how I can preload images so they're available later in an instant. I retrieve all image-urls that will be used later from the our server.
I've defined my custom cache manager getter:
class LocalCacheManager {
static const key = 'customCacheKey';
static CacheManager instance = CacheManager(
Config(
key,
stalePeriod: const Duration(days: 14),
maxNrOfCacheObjects: 200,
repo: JsonCacheInfoRepository(databaseName: key),
fileSystem: LocalCacheFileSystem(key),
fileService: HttpFileService(),
),
);
}
Here's how I currently try to preload the image:
LocalCacheManager.instance.downloadFile(MY_IMAGE_URL)),
And here's how I create the widget:
child: CachedNetworkImage(imageUrl: MY_IMAGE_URL, cacheManager: LocalCacheManager.instance),
But I can clearly see that files are always cached again as soon as I create the CachedNetworkImage.
You can use Flutter Cache Manager like this
DefaultCacheManager().downloadFile(MY_IMAGE_URL).then((_) {});
Later, just use your cached image like this
child: CachedNetworkImage(imageUrl: MY_IMAGE_URL,),
Simplest and workable way is to use precacheImage (flutter build-in function) with CachedNetworkImageProvider:
Image image = Image(
image: CachedNetworkImageProvider(/* url */),
fit: BoxFit.cover,
);
precacheImage(image.image, context);
return Padding(
padding: EdgeInsets.symmetric(horizontal: 16.0),
child: ClipRRect(
borderRadius: BorderRadius.circular(8.0),
child: image,
),
);
cached_network_image: ^2.0.0
CachedNetworkImage(
imageUrl: yoururl,
errorWidget: (context, url, error) => Text("error"),
imageBuilder: (context, imageProvider) => CircleAvatar(
radius: 120,
backgroundImage: imageProvider,
),
placeholder: (context, url) => CircularProgressIndicator(
backgroundColor: primary,
),
),
How can I have a fade in effect in CircleAvatar?
Type of backgroundImage of CircleAvatar is ImageProvider and FadeInImage is not a ImageProvider
Use Clip react,
for image loading i use CachedNetworkImage(cached_network_image: 2.3.3)
ClipRRect(
borderRadius: BorderRadius.circular(25.0),
child: CachedNetworkImage(
fit: BoxFit.cover,
width: 50,
height: 50,
placeholder: (context, url) => Image.asset('loadder.gif'),
imageUrl:
"https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcRLe5PABjXc17cjIMOibECLM7ppDwMmiDg6Dw&usqp=CAU"),
),
this is user loader image or gif(example).
placeholder: (context, url) => Image.asset('loadder.gif'),
this is your main image(example).
imageUrl:"https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcRLe5PABjXc17cjIMOibECLM7ppDwMmiDg6Dw&usqp=CAU"),