Xamarin Media Plugin

Question

Xamarin Media Plugin

I am using the xamarin forms media plugin (by james montemagno) and the actual image capture and saving works fine, I debugged the image creation on an emulator and was stored in

/storage/emulated/0/Android/data/{APPNAME}.Android/files/Pictures/{DIRECTORYNAME}/{IMAGENAME}

however in my application it will get a list of filenames from the API which I want to check if the image exists in that folder.

The following works fine on IOS:

var documentsDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
string jpgFilename = System.IO.Path.Combine(documentsDirectory, App.IMAGE_FOLDER_NAME);
jpgFilename = System.IO.Path.Combine(jpgFilename, name);

I tried the following two methods to get it on Android, but both are wrong.

var documentsDirectory = System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal);
string jpgFilename = System.IO.Path.Combine(documentsDirectory, App.IMAGE_FOLDER_NAME);
jpgFilename = System.IO.Path.Combine(jpgFilename, name);
Java.IO.File dir = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DataDirectory + "/" + App.IMAGE_FOLDER_NAME + "/" + name);

dir ends with / Store / emulate / 0 / data / {tEL} / {ImageName}

jpgFileName ends with / data / data / {APPNAME} .Android / files / {DIRECTORYNAME} / {IMAGENAME}

I don't want to hardcode any paths, but none of them are correct. I have not found anything in the GIT documentation for getting the file path other than by looking at the path to the file generated by the capture

+3

android c # xamarin.forms

wolfman1001 11 Apr 17 at 9:35 am

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2 answers

KFactory · Answer 1 · 2017-06-14T09:31:20+0000

Problem

I had the same problem with the Xamarin Media Plugin. For me the problem is this:

We really don't know where the plugin will save the image on Android.

After reading all the documentation I found, I just noted this:

... When your user takes a photo , it will still save the temporary data , but if necessary, make a copy in a public gallery (based on the platform). In the MediaFile, you will now see the AlbumPath, which you can also query.

(from: Plugin Github Page )

to save the photo to the phone gallery (it will be public), but this way is known.
and we don't know what it means to store temporary data.

Decision

After exploring how / where an app can store data, I found where the plugin stores photos on Android -> so I can generate back full filenames

In your Android app, the main path you are looking for is:

var basePath = Android.App.Application.Context.GetExternalFilesDir(null).AbsolutePath

It refers to the external private folder of the application . It looks like this:

/storage/emulated/0/Android/data/com.mycompany.myapp/files

So, to get the full path to the file:

var fullPath = basePath + {DIRECTORYNAME} + {FILENAME};

I suggest you make a dependency service like "ILocalFileService" that will expose this "base path" property.

Please let me know if this works for you!

Enrico · Answer 2 · 2017-06-14T11:07:25+0000

I solved a similar problem. I wanted to collect all files for my application in a folder visible to all users.

var documentsDirectory = Android.OS.Environment.GetExternalStoragePublicDirectory(
                                                Android.OS.Environment.DirectoryDocuments);

FileManager for Android

If you want to create Directory

, add to your class using System.IO;

and you will have the same functionality in a normal .NET application.

if (!Directory.Exists(path))
    Directory.CreateDirectory(path);

If you want to create files or directory, you can use PCLStorage

.

public async Task<bool> CreateFileAsync(string name, string context)
{
    // get hold of the file system
    IFolder folder = FileSystem.Current.LocalStorage;

    // create a file, overwriting any existing file
    IFile file = await folder.CreateFileAsync(name, 
                                              CreationCollisionOption.ReplaceExisting);

    // populate the file with some text
    await file.WriteAllTextAsync(context);

    return true;
}

Xamarin Media Plugin

Problem

Decision

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