How to change the ImageView source dynamically from a string? (Xamarin Android)

Question

I'm using Xamarin Android and I'm trying to change the ImageView src dynamically. All the pictures are placed in Resource/drawable. After reading the picture name as string from an xml (string imgName = nameFromXml + ".jpg") I would like to passing it to my ImageView. I guess there are two good ways:

1) Get the image (int)id and passing it to the ImageView using SetImageResource(): myTextView.SetImageResource(????????);

2) Get the Uri of the of the Image

EDIT
Unfortunately I couldn't use Eric answer for QuinDa question because there are many methods not existing on Xamarin Android, working just in Android.

Solution 1

Here is the standard Android method:

int resImage = getResources().getIdentifier(imgName , "drawable", getPackageName());
myTextView.setImageResource(resImage);

Please note that imgName variable must not contain file extension.

Xamarin.Android C#:

int resImage = Resources.GetIdentifier(imgName, "drawable", PackageName);

Solution 2

Thanks to SushiHangover and Romuald for their answer, but I'd like to share another way that I tested and it looks working well.

Here's how I get the id of the resource:

int resourceId = (int)typeof(Resource.Drawable).GetField("myImageName").GetValue(null);

So, then I'm able to use the normal SetImageResource():

imgViewCondition.SetImageResource(resourceId);

Solution 3

The following code snippet solves the issue:

int id = getResources().getIdentifier("XXX", "drawable", getPackageName());
imageView.setImageResource(id);

Solution 4

Just this:

FindViewById<ImageView>(Resource.Id.imageviewName).SetImageResource(Resource.Drawable.nameofimage);

Solution 5

I know it's an old question, but it never hurt to help.

The image should be stored in all the proper sizes for android inside the Resources Folder (drawable-hdpi, drawable-ldpi ....)

and then you get it dynamically like so

imageView.SetImageResource(Resource.Drawable.YourImageNameHere);

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