XamarinEssential.MediaPicker Image Size

Question

The current XamarinEssentials.MediaPicker api doesn't have an option to control the size/resolution of a image being saved by the camera. The older Xamarin Media Plugin library had this option. What's the current work around to adjust the size/resolution of a saved image?

Answer 1

Hello,​

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The current XamarinEssentials.MediaPicker api doesn't have an option to control the size/resolution of a image being saved by the camera

The MediaPickerOptions class doesn't provide the size function like the PickMediaOptions class of the media plugin. You could report a feature request to the product team on github.

What's the current work around to adjust the size/resolution of a saved image

To resize teh image file, a workaround is to get the stream from the picker image and then resize it on each platform. Check the code:

   private async void Button_Clicked_1(object sender, EventArgs e)  
   {  
       var photo = await MediaPicker.CapturePhotoAsync();  
       var stream = photo.OpenReadAsync().Result;  
     
       ResizeImage(stream);  
   }  
   protected async void ResizeImage(Stream stream)  
   {  
       byte[] imageData;  
     
       using (MemoryStream ms = new MemoryStream())  
       {  
           stream.CopyTo(ms);  
           imageData = ms.ToArray();  
       }  
     
       byte[] resizedImage = await ImageResizer.ResizeImage(imageData, 100, 100);  
     
       image.Source = ImageSource.FromStream(() => new MemoryStream(resizedImage));  
   }  
   ...  
     
   public static class ImageResizer  
   {  
       static ImageResizer()  
       {  
       }  
       public static async Task<byte[]> ResizeImage(byte[] imageData, float width, float height)  
       {  
           return ResizeImageAndroid(imageData, width, height);  
       }  
       public static byte[] ResizeImageAndroid(byte[] imageData, float width, float height)  
       {  
           // Load the bitmap  
           Bitmap originalImage = BitmapFactory.DecodeByteArray(imageData, 0, imageData.Length);  
           Bitmap resizedImage = Bitmap.CreateScaledBitmap(originalImage, (int)width, (int)height, false);  
     
           using (MemoryStream ms = new MemoryStream())  
           {  
               resizedImage.Compress(Bitmap.CompressFormat.Jpeg, 100, ms);  
               return ms.ToArray();  
           }  
       }  
   }  

For the function code other platforms, you could refer to this link:
https://github.com/xamarin/xamarin-forms-samples/blob/master/XamFormsImageResize/XamFormsImageResize/ImageResizer.cs

Best Regards,

Jarvan Zhang

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