Resize the image before Uploading to Api

Question

Good Day

My users tend to upload photos that are around 3mb or 5mb which takes a long time to render on the app. i would like to limit the images.

1) Is there a generic function or NuGet that can adjust the image and never loose its ratio or quality

2) What is a reasonable size that i can use to block the user if the size is exceed when uploading to an api

Please note i am using Xamarin and this reports an error in App centre

java.lang.RuntimeException: Canvas: trying to draw too large(106858752bytes) bitmap

Which obviously mean the image is too big to be rendered.

Thanks

Answer 1

Hello,​

Welcome to our Microsoft Q&A platform!

To resize the image before uploading, try using Bitmap.Compress method to compress the image. Get the compressed stream or byte array and update it to the server.

Here is the sample code, you cuold refer to it.

   Bitmap bitmap = BitmapFactory.DecodeFile("fileName");//or BitmapFactory.DecodeStream  
   var outStream = new System.IO.MemoryStream();  
   bitmap.Compress(Bitmap.CompressFormat.Png, quality, outStream);  
     
   //get the compressed byte array  
   var outArray = outStream.ToArray();  

Best Regards,

Jarvan Zhang

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Answer 2

You can use FFImageLoading library

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