[Android] How to get filesize in android

                       

   String filePath = Environment.getExternalStorageDirectory().toString() + "/toplogic.mp4";
   
   File file =new File(filePath);
    
   if(file.exists()){
   
   double bytes = file.length();
   double kilobytes = (bytes / 1024);
   double megabytes = (kilobytes / 1024);
   double gigabytes = (megabytes / 1024);
   double terabytes = (gigabytes / 1024);
   double petabytes = (terabytes / 1024);
   double exabytes = (petabytes / 1024);
   double zettabytes = (exabytes / 1024);
   double yottabytes = (zettabytes / 1024);
   
    Toast.makeText(getApplicationContext(),"File size  : " + megabytes , Toast.LENGTH_SHORT).show();
   }
   else
   {
    Toast.makeText(getApplicationContext(),"File does not exists!" , Toast.LENGTH_SHORT).show();
   }