WriteableBitmap from Uri Windows phone 8.1

Question

Hi I'm having a problem with Windows Phone 8.1 Universal app. I have to create a WriteableBitmap from an image i have on the phone. I have my uri

Uri uri = new Uri("ms-appx;/Images/imageName.png");

but i honestly don't know how to use it to create a WriteableBitmap. I found a lot of solutions but they all use

WriteableBitmap wb = new WriteableBitmap(bitmapImageName);

This code is not working on Windows Phone 8.1, the only constructor avaiable is

WriteableBitmap wb = new WriteableBitmap(pixelHeight, pixelWidth);

bit i honestly don't know what to do.

Any help will be appreciated

Thanks all

Answer 1

var uri = new Uri("ms-appx:///Images/imageName.png");
var storageFile = await StorageFile.GetFileFromApplicationUriAsync(uri);
var writeableBitmap = new WriteableBitmap(pixelHeight, pixelWidth);
using (var stream = await storageFile.OpenReadAsync())
{
    await writeableBitmap.SetSourceAsync(stream);
}