I am trying to access an image that i download from remote server. My code to download the file is as below :
var targetPath = cordova.file.documentsDirectory + propp+".png";
var trustHosts = true;
$cordovaFileTransfer.download(url, targetPath, options, trustHosts)
.then(function(result) {
console.log("Local file transfer done");
r = angular.toJson(result.nativeURL);
}, function(err) {
// Error
console.log("error");
});
Then I stored tatgetPath in my local sqlite database. In another page I get this from sqlite and try to display with img tag. But it display like broken Image on Emulator as well as on actual device.
My file url is :
file:///var/mobile/Containers/Data/Application/F7B3169B-D8E3-4F62-AD0B-37CFA381F1CC/Documents/home_bg_image.png
I want to display this image as a background image bit I don't understand how to do this.
After downloading the image you have to paste it in platform/android/assets/www/img-- folder to display the image as
var filedirPath = $ionicPlatform.is('android') ? '/android_asset/www/img/' : 'img';
if not find the path of the image and access the file to display for reference please check this link File path
Having any queries reply ..
Related
I am trying to make a screen that shows information from the database such as the image and other fields to be able to update.
I get a Cannot retrieve length of file, path, (OS Error: No such file or directory, errno = 2) problem.
When I open the camera the photo is updated correctly.
I think the problem appears because it is not a route that you get using the camera and it is a route that is saved from the database.
So when I don't update or dont open the camera in the Image Picker File, the File image is assigned the path of the database.
They are the same routes of the same photo.
I don't know if I have to do something in php before I get the path from the database when I send it to flutter
Example of a new camera path, just used by the camera and a path that I get from the database, previously saved::
I get this route from the camera
File: '/data/user/0/com.example.rati_app/cache/3b4075c7-03df-471b-b8c0-7b88561ab29f32288.jpg'
i get this route from the data base
fzn/3b4075c7-03df-471b-b8c0-7b88561ab29f32288.jpg
code and image::
////////////////// dart flutter ///////////////
Future UpdateProfileUser(RoutePictureProfile) async {
var Url = Uri.parse("http://.....");
var request = await http.MultipartRequest('POST', Url);
var pic = await http.MultipartFile.fromPath('User_image',RoutePictureProfile);
request.files.add(pic);
var response = await request.send();
}
////////////////////////// php ///////////////////////
get the information from database
<?php
include("Database.php");
$consulta = "select User_p,User_name,Usuario_email,user_´picture from user";
$query = $conex->query($consulta);
$data=array();
header("Content-Type: application/json");
while($row = $query->fetch_assoc()){
$data[]=$row;
}
echo json_encode($data,JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
$conex->close();
?>
insert the photo camera
<?php
$imagen = $_FILES['User_image']['name'];
$imagePath = 'fzn/'.$imagen;
$tmp_name = $_FILES['User_image']['tmp_name'];
move_uploaded_file($tmp_name,$imagePath);
?>
enter image description here
i'm writing an app that upload and save images from directories of windows to the app. I have write the function to upload the image on the app but I can't find a function to save the image in a determinate folder.
I tried the function of the library file_picker but save only the settings and I have no idea ho to save the image. Can someone help me?
the code:
TextButton(
onPressed: () async {
String? newPath = await FilePicker.platform.saveFile(
fileName: nameFile,
type: FileType.image,
);
FilePickerCross file = FilePickerCross(
Uint8List.fromList(nameFile.codeUnits),
path: newPath,
);
await file.exportToStorage();
},
update:
I found the library file_picker_cross. There's two problems:
when i try to save the app opens the save window twice in a row;
the saved file is as if it were corrupt because show the text
"format not supported even if it is a png".
enter image description hereI have the url and now when I click on specific url then it should navigate to next page and open the file , here but it say that no such file directory exits.
Future<File> getFileFromUrl(String url) async {
try {
var data = await http.get(url);
var bytes = data.bodyBytes;
var dir = await getApplicationDocumentsDirectory();
File file = File("${dir.path}/mypdfonline.pdf");
File urlFile = await file.writeAsBytes(bytes);
return urlFile;
} catch (e) {
throw Exception("Error opening url file");
}
}
I should get filepath
If you are trying to open an url, you need url_launcher plugin support or web view plugin support to load the URL content. But it looks like that your trying to access the file from assets, I'm thinking. If is that so, did you added your file in assets folder and adding the path inside pubspec.yaml file. Then you have to access the file using from assets.
If my answer not helpful, please elaborate your question a bit clear with some screenshot of your app, that what you are trying to achieve. Thank you.... Happy learning.
I would like to do image annotation for my Ionic Application. So the flow of the app would be using the camera plugin to take a picture and use FabricJs to draw on the image then save the file.
I hit the roadblock when I am trying to save or overwrite the file. Apparently the source "http://localhost:8080/file/data/user/0/***/files/1547183479807.png" file does not update.
The flow of the app
1) Take picture with #ionic-native/camera
2) Copy the file to a local directory
3) Use this.win.Ionic.WebView.convertFileSrc to convert the file name to "http://localhost:8080/file/data/user/0/***/files/1547183479807.png"
4) Push to another page to access the canvas
5) Use the link to setBackground to my canvas (FabricJs)
6) Draw on the image (Manually)
7) Save the file via overwriting the existing file but nothing works from here on.
I tried to
- overwrite with writeFile & writeExisitingFile, did not work.
- removeFile and writeFile and did not work.
- tried converting to ArrayBuffer rather than Blob and did not work
- tried creating another new file, did not work too (it seems like after I push to a new page, all the file functions does not affect the files)
- tried using native cordova but did not work too.
- delete that same files twice, (first time I did not get an error but the second time I got an error saying "File Does not exist" but when I view the source, the file is also there and appearing in my thumbnail on my App.
private copyFileToLocalDir(namePath, currentName, newFileName,id,index) {
this.file.copyFile(namePath, currentName, this.file.dataDirectory, newFileName).then(success => {
const keys = id.split('-');
let filename = this.file.dataDirectory + newFileName;
this.fp = this.win.Ionic.WebView.convertFileSrc(filename) ;
this.navCtrl.push(AnnotationsPage, {
filepath: this.fp,
filename: newFileName
});
this.presentToast("Image Successfully Added",'middle');
}, error => {
this.presentToast('Error while storing file.','middle');
});
}
Annotation.ts
savePicture() {
let image = this.canvas.toDataURL({
format: 'png'
});
this.saveBase64(image);
}
public saveBase64(base64:string):Promise<string>{
return new Promise((resolve, reject)=>{
var realData = base64.split(",")[1]
let blob=this.b64toBlob(realData,"image/png")
this.file.writeFile(this.file.dataDirectory,this.filename,blob,{replace:true})
// this.file.writeExistingFile(this.file.dataDirectory,this.filename, blob)
.then((val)=>{
console.log('Write Info',val)
let fp = this.win.Ionic.WebView.convertFileSrc(this.file.dataDirectory+this.filename) ;
})
.catch((err)=>{
console.log('error writing blob')
console.log(err);
// reject(err)
})
})
}
b64toBlob(b64Data, contentType) {
contentType = contentType || '';
var sliceSize = 512;
var byteCharacters = atob(b64Data);
var byteArrays = [];
for (var offset = 0; offset < byteCharacters.length; offset += sliceSize) {
var slice = byteCharacters.slice(offset, offset + sliceSize);
var byteNumbers = new Array(slice.length);
for (var i = 0; i < slice.length; i++) {
byteNumbers[i] = slice.charCodeAt(i);
}
var byteArray = new Uint8Array(byteNumbers);
byteArrays.push(byteArray);
}
I check the base64 file, it is working fine (Throw the data to an online converter and it display the picture.
After the function "copyFileToLocalDir", it seems like I am unable to modify the files store in the local directory.
Thanks in advance. Feel free to ask me more question. 7 hours and no result.
Update on the testing, I am doing.
Did File.readAsDataUrl and as expected the file file:///data/user/0/*/files/1547231914843.png updated from the old image to the new edited. (Tested the base64 on some online converter) but it still does not reflect on the source http://localhost:8080/file/data/user/0/***/files/1547231914843.png
Thanks to all those who read through.
After tons of testing, I found out that Ionic Webview's files, will not be updated unless you recall them again (Kind of like a cache and apparently there is no way to reset or flush the cache).
So in my case, I would need to remove the image from the webview and call it out again then it will go back to retrieve again or create another file with another file name and display it.
I'm trying to use the share() method, including an image, but I'm having trouble supplying the proper path to the image. Where should I put the image file, and what is the path (putting in the default package and trying "jar:///myimage.png" didn't work), and why is this not documented clearly?
image can be stored in storage which is following path for window
C:\Users\userName.cn1
and the image can be read by using following codes
InputStream is = Storage.getInstance().createInputStream("tizbn.JPG");
EncodedImage i = EncodedImage.create(is, is.available());
Loading image from default folder
Image i =EncodedImage.create("/tizbn.png");
Loading image From Theme
EncodedImage current = (EncodedImage) fetchResourceFile().getImage("tizbn.png");
The share API works with https://www.codenameone.com/javadoc/com/codename1/io/FileSystemStorage.html[FileSystemStorage] and not with https://www.codenameone.com/javadoc/com/codename1/io/Storage.html[Storage].
You need to save the file into a file system path which is always an absolute path, we recommend using the app home to store files. There is a sample in the developer guide section on the ShareButton covering this:
Form hi = new Form("ShareButton");
ShareButton sb = new ShareButton();
sb.setText("Share Screenshot");
hi.add(sb);
Image screenshot = Image.createImage(hi.getWidth(), hi.getHeight());
hi.revalidate();
hi.setVisible(true);
hi.paintComponent(screenshot.getGraphics(), true);
String imageFile = FileSystemStorage.getInstance().getAppHomePath() + "screenshot.png";
try(OutputStream os = FileSystemStorage.getInstance().openOutputStream(imageFile)) {
ImageIO.getImageIO().save(screenshot, os, ImageIO.FORMAT_PNG, 1);
} catch(IOException err) {
Log.e(err);
}
sb.setImageToShare(imageFile, "image/png");