I have URI LIKE below
content://media/external/images/media/5275
but I want convert it to Like format below:
/storage/emulated/0/DCIM/Camera/IMG_00124.jpg
Anyone who can help me!
Sreng Bona
Thanks!
var path = await FlutterAbsolutePath.getAbsolutePath("content://media/external/images/media/5275");
Add this flutter_absolute_path: ^1.0.6 to your file: pubspec.yaml
It will be working as Well.
Bona SR.
I had to search a lot, but I found a very useful solution to save the image in the cell phone's photo gallery and get the absolute path to use it the way you want.
For this example I used a result obtained from saving an image in the photo gallery, however it could also work to read other files, obviously making the changes that you see necessary, I hope it will help you
uri_to_file
image_gallery_saver
import 'dart:io';
import 'package:image_gallery_saver/image_gallery_saver.dart';
import 'package:uri_to_file/uri_to_file.dart';
Future<File> saveImage(File image, String identifier) async {
try {
var result = await
ImageGallerySaver.saveImage(image.readAsBytesSync(),
quality: 60, name: identifier +
"-${DateTime.now().toIso8601String()}");
print(result);
File file = await toFile(Uri.parse(result['filePath']));
print(file);
return file;
} catch (e) {
print(e);
return new File('assets/img/default-img.jpg');
}
}
// example
saveImage(File("path/image.jpg"),"img-test");
Related
I apologise in advance if this is a silly question, but I have created a file and stored it in my "assets" sub-directory, which is at the same level as my lib directory and my pubspec.yaml file. I've set the relative path to "assets/ExerData.json" in my code (see below).
When I run the code saved as a scratch.dart file as shown below, hitched up to a Galaxy Nexus API 29 emulator, it can only tell me "Can't find file!"
import 'dart:io';
import 'package:flutter/services.dart';
String filePath = "assets/ExerData.json";
void main() {
performTasks();
}
void performTasks() {
if (checkFileExists(filePath)) {
readFile(filePath);
} else {
print("Can't find file");
}
}
bool checkFileExists(path) {
bool result = File(path).existsSync();
print(result.toString());
return result;
}
Future<String> readFile(path) async {
return await rootBundle.loadString(filePath);
}
I populated my pubspec.yaml file with this entry:
assets:
- assets/ExerData.json
I expected it to find my file, read it using rootbundle.loadstring(path), and print out the resulting string to the console.
As I say, all it did was print "Can't find file".
I'd very much appreciate you help on this one!
Thanks in advance!
The rootBundle contains the resources that were packaged with the app when it was built. All files specified under assets: in your pubspec are packaged with the app. You can check if file exists by wrapping rootBundle.loadString() inside try{} catch(){} block.
Future<bool> fileExists(String path) async {
try {
await rootBundle.loadString(path);
} catch (_) {
return false;
}
return true;
}
or
Future<String?> loadFile(String path) async {
try {
return await rootBundle.loadString(path);
} catch (_) {
// File not found Exception
return null;
}
}
File is a dart class. It needs absolute or relative path of the file being read.
You can use File with path_provider to get the absolute path from the current File System.
For example on Android:
Future<void> getPath() async {
Directory appDocDir = await getApplicationDocumentsDirectory();
String appDocPath = appDocDir.path;
print('PATH IS : $appDocPath');
}
prints
'/data/user/0/com.soliev.file_demo/app_flutter'
Use:
String data = await DefaultAssetBundle.of(context).loadString("assets/ExerData.json");
final jsonResult = jsonDecode(data);
Reference: How to load JSON assets into a Flutter App?
As it turns out, the program logic had not completed initializing the necessary binding.
I called the method WidgetsFlutterBinding.ensureInitialized() in the first line of the main class and everything started working as I expected.
Thanks to everyone who looked at my question!
Here's a similar question involving binding with XML files:
How to read XML files in flutter?
I am using image picker to pick image from device(App) and after that stored that file in provider class like that.
File? _img;
get img=> _img;
void putbannerimg(File img) {
_img = img;
notifyListeners();
}
I found out that image picker does not compress png images, I tried compressing it with flutter_image_compress
compressFile() async {
final formservice = Provider.of<PostForm>(context, listen: false);
File file = formservice.bannerfile;
final result = await FlutterImageCompress.compressWithFile(
file.absolute.path,
quality: 54,
);
formservice.putbannerimg(File.fromRawPath(result!));
}
I tried this way And other multiple ways but getting different different errors I want to upload this file in firebase storage like this
var task = storageicon.putFile(formservice.iconfile);
please tell me where I am going wrong, without compress file all things are working fine
Edit: I found out that path should be a string how can I parse local code file in that
If you are using the "flutter_image_compress" package
You may have to use the compress function for files stored on the phone like this:
Future<File> testCompressAndGetFile(File file, String targetPath) async {
var result = await FlutterImageCompress.compressAndGetFile(
file.absolute.path, targetPath,
quality: 88,
rotate: 180,
);
print(file.lengthSync());
print(result.lengthSync());
return result;
}
"compressAndGetFile()" returns a file while "compressWithFile()" returns a Uint8List.
If i understand your last question right, you want to use an image built into your application by default.
For this, you have to open your "pubsepc.yaml", go to the "flutter:" mark and add "assets:" like so:
flutter:
assets:
- path
"path", in my example, describes a top level folder containing assets like pictures.
You can freely describe its name.
I am using the flutter_web_image_picker package to allow the user to select -and then upload to Firebase- an image.
However, the package returns an image widget, which I can display, but I cannot upload to Firebase. Therefore, I am trying to read the package's code and update it to fit my needs.
In general, I think the packages main functionalities are:
It gets the file
//...
final reader = html.FileReader();
reader.readAsDataUrl(input.files[0]);
await reader.onLoad.first;
final encoded = reader.result as String;
Then it 'strippes' it
final stripped = encoded.replaceFirst(RegExp(r'data:image/[^;]+;base64,'), '');
final imageName = input.files?.first?.name;
//...
To finally return it as a Widget:
final imageName = imageName;
final imageData = base64.decode(stripped);
return Image.memory(imageData, semanticLabel: imageName);
As I said, it works perfectly, however, I need to adapt it to my needs:
I would like to get the image as a .jpg file so that I can upload it to Firebase.
Is any of the variables above the actual .jpg file? Is there any transformation that I should perform to get a .jpg file?
Thanks!
I based my answer on this post.
Basically, on the flutter_web_image_picker package, before the code I posted, there were a few lines that get an actual html file:
final html.FileUploadInputElement input = html.FileUploadInputElement();
input..accept = 'image/*';
input.click();
await input.onChange.first;
if (input.files.isEmpty) return null;
Then using firebase's pacakge, I uploaded the image as follow:
import 'package:firebase/firebase.dart' as fb;
fb.StorageReference storageRef = fb.storage().ref('myLocation/filename.jpg');
fb.UploadTaskSnapshot uploadTaskSnapshot = await storageRef.put(input.files[0]).future;
Uri imageUri = await uploadTaskSnapshot.ref.getDownloadURL();
return imageUri;
I am developing an app that fetches a custom object from my REST API. The object's class is called MyItem and it looks like this:
class MyItem {
String title;
String profilePicURL;
String videoURL;
}
As you can see, the class contains two URLs, that points to a png and mp4 files.
I would like to implement a feature, which allows the user to download the object, in order to access its content offline. I have no problem saving the title property, but how can I save the two URLs (because I don't want the URL itself to be saved, I would like to save the file it points to).
Any idea what is the best way doing that in Flutter and Dart?
Thank you!
import 'package:dio/dio.dart';
import 'package:path_provider/path_provider.dart';
var directory = await getApplicationDocumentsDirectory();
Dio dio = Dio();
//Below function will download the file you want from url and save it locally
void Download(String title, String downloadurl) async{
try{
await dio.download(downloadurl,"${directory.path}/$title.extensionoffile",
onReceiveProgress: (rec,total){
print("Rec: $rec, Total:$total");
setState(() {
//just to save completion in percentage
String progressString = ((rec/total)*100).toStringAsFixed(0)+"%";
}
);
});
}
catch(e){
//Catch your error here
}
}
Now again wherever you want just use
var directory = await getApplicationDocumentsDirectory();
String filepath = "{directory.path}/filename.fileextension";
Now you can use this Image.file('filepath'); //to display those image
also you can use
video player plugin
where again VideoPlayerController.file('filepath') //to show video but read documention properly
These are just a whole steps or a broader view, you need to use them as a map and build your code.That is have a proper file name and extension saved or correctly fetched or mapped
I am following the following flutter package to take a screenshot of my one app page:
https://pub.dev/packages/screenshot
I have successfully implemented the example and I can see my screenshots in the gallery.
My issue is that I would like to be able to NAME those images when they are stored in the gallery using some sort of numbering system. e.g. INV_0001, INV_0002.
Is there a way to do this in code? I have the following code that successfully takes the screenshot, but does not rename the file.
CODE
_imageGallerySaver() async {
final directory = (await getApplicationDocumentsDirectory()).path; //from path_provide package
String fileName = "Bob";
String pathName = '$directory/$fileName.png';
//print(path);
screenshotController
.capture(
path: pathName,
).then((File image) async {
print("image: $image");
setState(() {
_imageFile = image;
});
print(pathName);
final result =
await ImageGallerySaver.saveImage(image.readAsBytesSync());
print("File Saved to Gallery. result: $result");
//print("path: $path");
}).catchError((onError) {
print(onError);
});
}
SNIPPET
print("File Saved to Gallery. result: $result");
results in the following output:
File Saved to Gallery. result: file:///storage/emulated/0/app_name/1581602261670.png
I would like to rename the "1581602261670" part, if possible. Thank you
In your code, you are passing that file name to construct the path, then why not change the name there itself.
Anyway, you can rename an existing file using
await file.rename (newPath
):
Can't rename files using this method. Need to use a package called Gallery Saver:
https://pub.dev/packages/gallery_saver
This package allows you to set your own file name and save to the gallery.