I'm trying with two different images with same name. But the path was same for two picked images. it was not unique.So that I uploaded in server second image with the same name of first uploaded image. But server had both the image are same and it had first image. So how to handle this case and customize the path?
You can use the path_provider to define the customize directory on your app.
So, copy the file with your customize path and rename the file name.
BTW, do NOT save the absolute path of File on iOS.
The iOS use SandBox to access the file. When you get the file path every time. The file path will be different.
class FileUtils {
final String avatarPath = '/avatar/';
Future<String> getAvatarDirectoryPath() async {
final String appDirPath = await getApplicationSupportDirectory().path;
final Directory avatarDirPath = await Directory(appDirPath + avatarPath).create();
return directory.path;
}
}
// Example
{
final XFile? image = await ImagePicker().pickImage(source: ImageSource.camera);
final File imageFile = File(image.path);
final File newFile = File(await FileUtils().getAvatarDirectoryPath() + 'userAvatar.png');
await imageFile.copy(newFile.path);
}
Related
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$rand.jpg")
..writeAsBytesSync(img.encodeJpg(gambarKecilx, quality: 95));
for getting the number of files, just obtain the files to a list and check the length of the list
var listOfFiles = await myImgDir.list(recursive: true).toList();
var count = countList.length;
Or check this.
In my flutter application I can create a pdf file, then I want to save it in Download folder.
I'm trying to achieve this goal with path_provider package, but I can't.
This is the sample code from flutter's cookbook, If I use it I don't get any error, but I don't find the file either.
final directory = await getApplicationDocumentsDirectory();
File file2 = File("${directory.path}/test.txt");
await file2.writeAsString('TEST ONE');
What's the correct way to do it?
To find the correct path please use ext_storage.
You will need this permission
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
on Android 10 you need this in your manifest
<application
android:requestLegacyExternalStorage="true"
on Android 11 use this instead
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" />
Remember to ask for them using permission_handler
I leave you my code:
static Future saveInStorage(
String fileName, File file, String extension) async {
await _checkPermission();
String _localPath = (await ExtStorage.getExternalStoragePublicDirectory(
ExtStorage.DIRECTORY_DOWNLOADS))!;
String filePath =
_localPath + "/" + fileName.trim() + "_" + Uuid().v4() + extension;
File fileDef = File(filePath);
await fileDef.create(recursive: true);
Uint8List bytes = await file.readAsBytes();
await fileDef.writeAsBytes(bytes);
}
Android 11 changed a lot of things with its emphasis on scoped storage. Although /storage/emulated/0/Android/data/com.my.app/files is one of the directory paths given by the path_provider pkg, you won't be able to see files saved in /storage/emulated/0/Android/data/com.my.app/files just using any run-of-the-mill file application (Google Files, Samsung My Files, etc.).
A way to get around this (although it only works on Android) is to specify the "general" downloads folder as shown below.
Directory generalDownloadDir = Directory('/storage/emulated/0/Download');
if you write whatever file you are trying to save to that directory, it will show up in the Downloads folder in any standard file manager application, rather than just the application-specific directory that the path_provider pkg provides.
Below is some test code from an app I'm building where I save a user-generated QR code to the user's device. Just for more clarity.
//this code "wraps" the qr widget into an image format
RenderRepaintBoundary boundary = key.currentContext!
.findRenderObject() as RenderRepaintBoundary;
//captures qr image
var image = await boundary.toImage();
String qrName = qrTextController.text;
ByteData? byteData =
await image.toByteData(format: ImageByteFormat.png);
Uint8List pngBytes = byteData!.buffer.asUint8List();
//general downloads folder (accessible by files app) ANDROID ONLY
Directory generalDownloadDir = Directory('/storage/emulated/0/Download'); //! THIS WORKS for android only !!!!!!
//qr image file saved to general downloads folder
File qrJpg = await File('${generalDownloadDir.path}/$qrName.jpg').create();
await qrJpg.writeAsBytes(pngBytes);
Fluttertoast.showToast(msg: ' $qrName QR code was downloaded to ' + generalDownloadDir.path.toString(), gravity: ToastGravity.TOP);
You want getExternalStorageDirectories. You can pass a parameter to specify the downloads specifically:
final directory = (await getExternalStorageDirectories(type: StorageDirectory.downloads)).first!;
File file2 = File("${directory.path}/test.txt");
await file2.writeAsString('TEST ONE');
If you're using null safety you don't need the bang operator:
final directory = (await getExternalStorageDirectories(type: StorageDirectory.downloads)).first;
File file2 = File("${directory.path}/test.txt");
await file2.writeAsString('TEST ONE');
For downloading file in Downloads folder, here are examples:
// Save multiple files
DocumentFileSave.saveMultipleFiles([textBytes, textBytes2], ["text1.txt", "text2.txt"], ["text/plain", "text/plain"]);
//Save single text file
DocumentFileSave.saveFile(textBytes, "my_sample_file.txt", "text/plain");
//Save single pdf file
DocumentFileSave.saveFile(pdfBytes, "my_sample_file.pdf", "appliation/pdf");
//Save single image file
DocumentFileSave.saveFile(imageJPGBytes, "my_sample_file.jpg", "image/jpeg");
More details of library here:
https://pub.dev/packages/document_file_save_plus
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 : $res");
imageCache.clear();
}
catch(e) {
print(e.toString());
}
try {
// Ensure that the camera is initialized.
await _initializeControllerFuture;
// Construct the path where the image should be saved using the
// pattern package.
final path = join(
// Store the picture in the temp directory.
// Find the temp directory using the `path_provider` plugin.
(await getTemporaryDirectory()).path,
profilo+'.jpg',
);
// Attempt to take a picture and log where it's been saved.
await _controller.takePicture(path);
What I'm missing?
Thanks
You are trying to clear only the cache, but the file still exists. You need to do:
Remove the old file (from the temporary directory)
Clear the cache
Take the new picture
File pictureFile = File(path);
if (pictureFile.existsSync()) {
pictureFile.deleteSync();
imageCache.clear();
}
...
await _controller.takePicture(path);
I am following the following flutter package to take a screenshot of my one app page:
https://pub.dev/packages/screenshot
I have successfully implemented the example and I can see my screenshots in the gallery.
My issue is that I would like to be able to NAME those images when they are stored in the gallery using some sort of numbering system. e.g. INV_0001, INV_0002.
Is there a way to do this in code? I have the following code that successfully takes the screenshot, but does not rename the file.
CODE
_imageGallerySaver() async {
final directory = (await getApplicationDocumentsDirectory()).path; //from path_provide package
String fileName = "Bob";
String pathName = '$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: $result");
results in the following output:
File Saved to Gallery. result: file:///storage/emulated/0/app_name/1581602261670.png
I would like to rename the "1581602261670" part, if possible. Thank you
In your code, you are passing that file name to construct the path, then why not change the name there itself.
Anyway, you can rename an existing file using
await file.rename (newPath
):
Can't rename files using this method. Need to use a package called Gallery Saver:
https://pub.dev/packages/gallery_saver
This package allows you to set your own file name and save to the gallery.
My question is if there is a way to load a .pdf file in app resources like assets when deploying flutter app ? I'd like to display a PDF file using this:
https://pub.dartlang.org/packages/flutter_full_pdf_viewer
but without loading from internet ;)
Copy the asset to a temporary file.
Future<File> copyAsset() async {
Directory tempDir = await getTemporaryDirectory();
String tempPath = tempDir.path;
File tempFile = File('$tempPath/copy.pdf');
ByteData bd = await rootBundle.load('assets/asset.pdf');
await tempFile.writeAsBytes(bd.buffer.asUint8List(), flush: true);
return tempFile;
}