I'm trying to evict the image cache before take a picture, but it doesn't work and I cannot reupdate an image with the same name because it gives me cache error that the file already exists.
Directory pathCache;
String pathFile;
pathCache = await getTemporaryDirectory();
pathFile = pathCache.path+"/"+profilo+'.jpg';
print(pathFile);
try {
bool res =imageCache.evict(pathFile);
print("eviction result : $res");
imageCache.clear();
}
catch(e) {
print(e.toString());
}
try {
// Ensure that the camera is initialized.
await _initializeControllerFuture;
// Construct the path where the image should be saved using the
// pattern package.
final path = join(
// Store the picture in the temp directory.
// Find the temp directory using the `path_provider` plugin.
(await getTemporaryDirectory()).path,
profilo+'.jpg',
);
// Attempt to take a picture and log where it's been saved.
await _controller.takePicture(path);
What I'm missing?
Thanks
You are trying to clear only the cache, but the file still exists. You need to do:
Remove the old file (from the temporary directory)
Clear the cache
Take the new picture
File pictureFile = File(path);
if (pictureFile.existsSync()) {
pictureFile.deleteSync();
imageCache.clear();
}
...
await _controller.takePicture(path);
Related
I am creating an app that saves images locally through sqflite, I have soon found out that the images are being saved as temp which means that it will be deleted by the device and i'm not able to retrieve those images anymore. I have been coding to save it to the document directory of the app but it seems to fail and throw error
[ERROR:flutter/runtime/dart_vm_initializer.cc(41)] Unhandled Exception: FileSystemException: Cannot copy file to '/data/user/0/com.example.e4psmap/cache/scaled_0d5d5070-70da-4f42-9055-c31a6ed8d3d51761448072222030817.jpg', path = '/data/user/0/com.example.e4psmap/app_flutter/scaled_0d5d5070-70da-4f42-9055-c31a6ed8d3d51761448072222030817.jpg' (OS Error: No such file or directory, errno = 2)
this is my code:
void getpic(ImageSource src) async{
Uint8List byte;
final picfile = await _imagepicker.getImage(
source: src, imageQuality: 25
);
if(picfile != null){
Directory appDir = await getApplicationDocumentsDirectory();
String appdoc = appDir.path;
final filename = path.basename(picfile.path);
final local = File('${appdoc}/$filename');
final lclfile = await local.copy(picfile.path);
}
// converted = picfile!.path;
// setState(() {
// _imgfile = picfile!;
// });
Navigator.pop(context);
}
Anyone knows why I am having this errors, and any fix for this error, Thank you
The copy() function expects the source file to be passed as an argument, but in your code, you're passing picfile.path instead of the File object.
try to replace local.copy(picfile.path) with picfile.saveTo(local.path), which should save the image to the desired directory.
If you replace final with the corresponding class, the error will be very obvious.
How can I allow the user to save a file to a specific folder in Flutter?
I have built a simple desktop app for Mac that returns a file from an API.
Currently, it saves the file to a caches directory.
try {
io.Directory saveDir = await getTemporaryDirectory();
String filePath = saveDir.path;
io.File returnedFile = new io.File('$filePath/$filename.xlsx');
await returnedFile.writeAsBytes(result.bodyBytes);
print(saveDir);
} catch (e) {
print(e);
}
I played around with my original code and that provided by #Pavel and managed to write my solution to saving files to a custom user-picked directory in this fashion.
The first part opens a file picker dialogue that returns a path to a directory.
The second part provides the path to the File class that then writes the file to that directory.
Hope this helps anyone trying to save files.
String? outputFile = await FilePicker.platform.saveFile(
dialogTitle: 'Save Your File to desired location',
fileName: filename);
try {
io.File returnedFile = io.File('$outputFile');
await returnedFile.writeAsBytes(responsefile.bodyBytes);
} catch (e) {}
Use https://pub.dev/packages/file_picker
String? outputFile = await FilePicker.platform.saveFile(
dialogTitle: 'Please select an output file:',
fileName: 'output-file.pdf',
);
if (outputFile == null) {
// User canceled the picker
}
I need to save picture in a specific location rather than in temporary location.
void _takePicture(BuildContext context) async {
try {
await _initializeCameraControllerFuture;
final path =
join((await getTemporaryDirectory()).path, '${DateTime.now()}.png');
await _cameraController.takePicture(path);
Navigator.pop(context,path);
} catch (e) {
print(e);
}
}
You need to save the image into external storage directory for showing the image on gallery. Instead of getting temporary directory, obtain external storage directory.
final directory = await getExternalStorageDirectory();
You need to provide the permission on AndroidManifest.xml file of your android/app/src/main folder
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
then let's say that you want to create a folder named MyImages and add the new image to that folder,
final myImagePath = '${directory.path}/MyImages' ;
final myImgDir = await new Directory(myImagePath).create();
then write to the file to the path.
var kompresimg = new File("$myImagePath/image_$baru$rand.jpg")
..writeAsBytesSync(img.encodeJpg(gambarKecilx, quality: 95));
for getting the number of files, just obtain the files to a list and check the length of the list
var listOfFiles = await myImgDir.list(recursive: true).toList();
var count = countList.length;
Or check this.
I have this page where the camera is initialized and ready with a button that will record and stop the video, so I tried this :
FlatButton(
onPressed: () => {
!isRecording
? {
setState(() {
isRecording = true;
}),
cameraController.prepareForVideoRecording(),
cameraController.startVideoRecording('assets/Videos/test.mp4')
}
: cameraController.stopVideoRecording(),
},
............
but throws this error : nhandled Exception: CameraException(videoRecordingFailed, assets/Videos/test.mp4: open failed: ENOENT (No such file or directory)).
I don't understand, I don't want to open this file I want to save it there, Is there sth wrong with my code ?
In the new version, static method startRecordingVideo doesn't take any string parameter.
When you want to start the recording just see whether a video is already getting recorded, if not start
if (!_controller.value.isRecordingVideo) {
_controller.startVideoRecording();
}
and when you want to finish the recording you can call the static method stopVideoRecording() and it will give you a object of the class XFile, it will have the path to your video.
if (_controller.value.isRecordingVideo) {
XFile videoFile = await _controller.stopVideoRecording();
print(videoFile.path);//and there is more in this XFile object
}
This thing has worked for me. I am new to flutter please improve my answer if you know more.
You are trying to save a video in your assets folder which is not possible ,
What you need to do is to save to device locally either common folders like downloads or app directory.
Here is an example of how to go about it
dependencies:
path_provider:
Flutter plugin for getting commonly used locations on host platform
file systems, such as the temp and app data directories.
We will be saving the video to app directory.
We need to get the path to the directory where the file is or will be. Usually a file is put in the application's document directory, in the application's cache directory, or in the external storage directory. To get the path easily and reduce the chance of type, we can use PathProvider
Future<String> _startVideoRecording() async {
if (!controller.value.isInitialized) {
return null;
}
// Do nothing if a recording is on progress
if (controller.value.isRecordingVideo) {
return null;
}
//get storage path
final Directory appDirectory = await getApplicationDocumentsDirectory();
final String videoDirectory = '${appDirectory.path}/Videos';
await Directory(videoDirectory).create(recursive: true);
final String currentTime = DateTime.now().millisecondsSinceEpoch.toString();
final String filePath = '$videoDirectory/${currentTime}.mp4';
try {
await controller.startVideoRecording(filePath);
videoPath = filePath;
} on CameraException catch (e) {
_showCameraException(e);
return null;
}
//gives you path of where the video was stored
return filePath;
}
I am beginner on Flutter.
I want to do this process,,,
1. save a image file.
2. read the property information of the saved image file.
below is the code for it.
// save a image file.
String mainDir = await getMainDirectory(widget.topic);
String path = mainDir + '/' + count.toString();
image.copy(path);
ImageProperties properties;
try {
// get the property information of the image file.
properties = await FlutterNativeImage.getImageProperties( path);
}
on PlatformException catch(e) {
print( e );
// try again ...
properties = await FlutterNativeImage.getImageProperties(
path);
}
When this code running, sometimes an error is occurred.
the error message is "file is not exist".
So, I have to call "getImageProperties()" function again, and I can get the property.
If I can detect the completion of the file copy, I can make these code better.
Is there any suggestion ?
You can use await to make sure image copy finish
final File newImage = await image.copy(path);