I trying to create a whatsapp status saver in flutter. I trying to save the whatsapp status. I created a folder statuses in /storage/emulated/0/statuses/ and The process of copying goes well. But that Image is not shown in the gallery app.
So I even Tried storing it in DCIM/Camera still it doesn't show up there. But when the copy the same image using file explorer then that image shows up in gallery app. I think something is wrong with the image properties.
The code used to save is here.
saveFile(filePath) async {
String newFilename;
File originalFile = File(filePath);
Directory _directory = await getExternalStorageDirectory();
if (!Directory("/storage/emulated/0/statuses/").existsSync()) {
Directory("/storage/emulated/0/statuses/")
.createSync(recursive: false);
}
String curDate = DateTime.now().toString();
newFilename = "/storage/emulated/0/statuses/VIDEO-$curDate.jpg";
await originalFile.copy(newFilename).then((value) {
print("Saved: " + newFilename);
});
}
When you change a media, you should tell the device to re-scan. This image saver plugin will notify the Android OS about the media that is saved.
If you don't want the plugin, you can use platform channels to write native code yourself.
sendBroadcast(new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, Uri.parse("file://" + Environment.getExternalStorageDirectory())));
This issue is discussed here and here.
Related
I'm trying to upload selected image by MIT App Inventor II. What I did is to download an extension which encodes image to base64 coding, and then call Web1 to address Google App Script. Actually, what I did is just follow an YouTube channel, but somehow it does not work.
function doPost(e) {
var data = Utilities.base64Decode(e.parameters.data);
var blob = Utilities.newBlob(data,e.parameters.mimetype,e.parameters.filename);
var folderid = Utilities.base64Decode(e.parameters.folderid);
DriveApp.getFileById(folderid).createFile(blob);
return ContentService.createTextOutput("Your File Successfuly Uploaded");
}
Combining with Taifun's Extension. These blocks are confirmed to be able to do as below.
Display the ImagePicker selected image on the Image component
Encode the ImagePicker selected image to a Base64 string.
Send the string to URL (Google App Script)
We are dealing with the code from a course that loads an image. We are trying to do this with an Emulator API 26 Play Store active We have no jpg pictures on the emulator. The Device File Explore will let us Upload a jpg. We have tried various folders with no luck.
Our question is where to Upload the jpg to in the Device File Explore?
Code is Kotlin and the upload method is posted below
fun onChooseImage(view:View){
val intent = Intent()
intent.type = "image/*"
intent.action = Intent.ACTION_GET_CONTENT
val chooser = Intent.createChooser(intent,"Choose Image for Habit")
startActivityForResult(chooser,CHOOSE_IMAGE_REQUEST)
Log .d(TAG,"Image was sent" )
}
override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
super.onActivityResult(requestCode, resultCode, data)
if(requestCode == CHOOSE_IMAGE_REQUEST && resultCode == Activity.RESULT_OK
&& data != null && data.data != null){
Log.d(TAG,"An Image WAS Choosen")
val bitmap = tryReadBitmap(data.data)
bitmap?.let {
ivIcon.setImageBitmap(bitmap)
Log.d(TAG,"We Updated and Read Bitmap")
}
}
}
private fun tryReadBitmap(data: Uri?): Bitmap?{
return try{
MediaStore.Images.Media.getBitmap(contentResolver,data)
}catch (e:IOException){
e.printStackTrace()
null
}
}
And we are using Cold Boot on the emulator.
We have looked at other posts that suggest you can not use the emulator camera to save pictures to the emulator. Does this mean we need a real device to test this code?
Grendel's answer is workable but I would like to provide a less intensive set of steps
1. Load the app in question
2. Open AVD manager and select the little down icon next to the Emulator your using
3. Click on Wipe Data (suggestion keep Emulator setting Quick Boot) <- other topic
4. Store your jpg in this path Storage->Self->Primary-DCIM
5. This is done by RIGHT click DCIM select Upload navigate to jpg
6. Close AVD manage
7. Run your app and select the same Emulator
It seems with the emulator you need to scan the emulator with Dev Tools BUT one other issue seems to pop up the cache for google play services and google play store needs to be cleared. In the processes of fixing this we tried so many fixes not sure of all the steps in order. As for where to upload the jpg that we are sure of use this path with
/mnt/sdcard/DCIM/water.jpg When you get to DCIM right click it and select Upload
Here is a link that may help HELP LINK
I have developed an Xamarin forms application. Provided download option to download file in our application. I have clicked download file and download progress show in app itself. If lock the iphone while download is in progress and unlock it again download stopped. How can I process download even locked phone?. This occurs only in iOS and works properly in Android.
I have used webclient DownloadFileTaskAsync process to download a file and maintain progress value in it.
WebClient client = new WebClient();
client.DownloadFileTaskAsync(new Uri(DownloadUrl), FileName);
Updated Query:
I have implemented the back-grounding process into my source. I have used "Creating Background-Safe Tasks" concept for my download process. I can download more than one file, so put this process in Task itself previously. Now, I have used BeginBackgroundTask in my download process but download process not carried to UI, even BeginBackgroundTask code doesn't hit while debug the code.
Below function put in native and called this function from forms when click download button.
public async Task DownloadFile(string DownloadUrl, string FileName)
{
var taskID = UIApplication.SharedApplication.BeginBackgroundTask(async() =>
{
WebClient client = new WebClient();
client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(client_DownloadProgressChanged);
client.DownloadFileCompleted += new AsyncCompletedEventHandler(client_DownloadFileCompleted);
client.DownloadFileTaskAsync(new Uri(DownloadUrl), FileName);
});
UIApplication.SharedApplication.EndBackgroundTask(taskID);
}
Also registered the app into Background fetch registration categories and now also progress not carried out while lock screen or minimize the app.
Am I missing any process in background techniques? Could you please help me to resolve this or suggest some simple sample as my scenario?
Please help me on this to resolve it.
Regards,
Cheran
You will need to use NSURLSession instead and create a background session for it. You can read how to do this in the official Xamarin Documentation.
You might get away with using WebClient in a background session, but only for a very short time span by using the pattern described in the "Handle iOS Background Limits" docs:
Task.Factory.StartNew(() =>
{
//expirationHandler only called if background time allowed exceeded
var taskId = UIApplication.SharedApplication.BeginBackgroundTask(() => {
Console.WriteLine("Exhausted time");
UIApplication.SharedApplication.EndBackgroundTask(taskId);
});
while(myFlag == true)
{
Console.WriteLine(UIApplication.SharedApplication.TimeRemaining);
myFlag = SomeCalculationNeedsMoreTime();
}
//Only called if loop terminated due to myFlag and not expiration of time
UIApplication.SharedApplication.EndBackgroundTask(taskId);
});
Where you would replace the while with your WebClient code.
However, as mentioned you really need to use Background Transfers for this to work properly.
I'm developing an app for Windows Phone 7 and I'm using a Phonegap template for it.
Everything looks perfect, but now I’m stuck trying to open a PDF file in the browser.
I tried the following but that doesn’t work because the url of the PDF exceeds the 2048 character limit (it’s a data url). This code runs after the deviceReady event was fired.
var ref = window.open('http://www.google.com', '_blank', 'location=no');
ref.addEventListener('loadstart', function () { alert(event.url); });
Now, I'm trying to save the PDF file to storage and then I'm trying to have it opened by the browser, but the browser doesn't show anything. I'm editing the InAppBrowser.cs code from cordovalib and I added the following lines before calling browser.Navigate(loc);
private void ShowInAppBrowser(string url)
{
IsolatedStorageFile store = IsolatedStorageFile.GetUserStoreForApplication();
FileStream stream = store.OpenFile("test.pdf", FileMode.Create);
BinaryWriter writer = new BinaryWriter(stream);
var myvar = Base64Decode("the big data url");
writer.Write(myvar);
writer.Close();
if (store.FileExists("test.pdf")) // Check if file exists
{
Uri loc = new Uri("test.pdf", UriKind.Relative);
...
}
}
This code is returning the following error:
Log:"Error in error callback: InAppBrowser1921408518 = TypeError: Unable to get value of the property 'url': object is null or undefined"
I don’t wanna use ComponentOne.
Any help would be greatly appreciated!
You cannot open pdf files from the isolated storage in the default reader for PDF files. If the file is online e.g. it has a URI for it, you can use WebBrowserTask to open it since that will download and open the file in Adobe Reader.
On Windows Phone 8 you actually can open your own file in default file reader for that extension, but I am not sure how that will help you since you target PhoneGap and Windows Phone 7.
Toni is correct. You could go and try to build your own viewer (which would be the same thing as using C1, but with more time involved). I worked on a port of iTextSharp and PDFSharp for WP7, but neither of which are PDF Viewers. They are good for creating PDFs and parsing them some (but to render them there is more work involved). This has been a personal quest of mine, but honestly the best I have gotten is to be able to extract some images from the PDF (and none of the text)
try this
var installedLocation = Windows.ApplicationModel.Package.Current.InstalledLocation;
var assets = await installedLocation.GetFolderAsync("Assets");
var pdf = await assets.GetFileAsync("metro.pdf");
Windows.System.Launcher.LaunchFileAsync(pdf);
This worked correctly on my Device.
Is it possible to upload image or file to SkyDrive fom Metro Style App?
I have already found how to browse the file from SkyDrive. But I haven't found regarding uploading file to SkyDrive. If you reply me, it will be very thankful..
I don't think the file picker method works unless the user has the desktop app installed.
You should use a Sharing contract. If you add a data file (Storage Item) to share, then SkyDrive will be listed as a share target and the user gets a UI where they can choose where in their SkyDrive they want to save. This is how I implemented it in my app.
For more info...
http://msdn.microsoft.com/en-us/library/windows/apps/hh771179.aspx
You can use FileSavePicker to save files. This will of course give the user a chance to select where he wants to save to local documents folder or sky drive. The user is in control.
FileSavePicker savePicker = new FileSavePicker();
savePicker.SuggestedStartLocation = PickerLocationId.DocumentsLibrary;
savePicker.DefaultFileExtension = ".YourExtension";
savePicker.SuggestedFileName = "SampleFileName";
savePicker.FileTypeChoices[".YourExtension"] = new List<string>() { ".YourExtension"};
StorageFile file = await savePicker.PickSaveFileAsync();
if (file != null)
{
await FileIO.WriteTextAsync(file, "A bunch of text to save to the file");
}
Please note that in the sample code I am creating the content of the file in code. If you want the user to select an existing file from the computer then you will have to first use FileOpenPicker, get the file and then use FileSavePicker to save the contents of the selected file to the SkyDrive
Assuming that you are using XAML/JavaScript, the suggested solution is to use FilePicker.
The following link may help you.
http://msdn.microsoft.com/en-us/library/windows/apps/jj150595.aspx
Thanks Mamta Dalal and Dangling Neuron, but there is problem. But it looks like I can't use FileSavePicker. I have to upload file(documnet, photo) not only text file. I have to copy from one path to another. If I use FileSavePicker, I have to write every file content (text, png, pdf, etc) and can't copy. Currently I am using FolderPicker. But unfortunately, FolderPicker doesn't support SkyDrive.My Code is As follow:
>FolderPicker saveFolder = new FolderPicker();
>saveFolder.ViewMode = PickerViewMode.Thumbnail;
>saveFolder.SuggestedStartLocation = PickerLocationId.Desktop;
>saveFolder.FileTypeFilter.Add("*");
>StorageFolder storagefolderSave = await saveFolder.PickSingleFolderAsync();
>StorageFile storagefileSave = [Selected storagefile with file picker];
>await storagefileSave.CopyAsync(storagefolderSave,storagefileSave.Name,NameCollisionOption.ReplaceExisting);
It will be greate that if FolderPicker supports SkyDrive or can copy file using FileSavePicker.