Type 'image' is not a subtype of type 'imageprovider ＜ object ＞ solution

problem ：

flutter BoxDecoration The error code for setting the page background image is as follows ：

decoration:
      BoxDecoration( image: DecorationImage(image: _image) ),

to image Property specifies that the picture is Image.asset：

get _image => Image.asset('asset/images/loginpageback.jpg');

Report errors ：

type 'Image' is not a subtype of type 'ImageProvider<Object>

resolvent ：

hold ImageAsset Change to AssetImage：

image: DecorationImage(
    image: AssetImage('asset/images/loginpage/loginpageback.jpg'),
  fit: BoxFit.cover
),

So that we don't make a mistake