how do I check the file size of a video in flutter

问题:

I want to upload a video file to my cloud storage but I want to check the size of the video file before I upload. how to achieve this

回答1:

If you have the path of the file, you can use dart:io

var file = File('the_path_to_the_video.mp4');

You an either use:

print(file.lengthSync()); 

or

print (await file.length());

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Note: The size returned is in bytes.