Image Scale Type Center Crop on Flutter

Image Scale type center crop on flutter?

Android ScaleType and BoxFit should match like this:

1. CENTER = none
2. CENTER_CROP = cover
3. CENTER_INSIDE = scaleDown
4. FIT_CENTER = contain (alignment.center)
5. FIT_END = contain (alignment.bottomright)
6. FIT_START = contain (alignment.topleft)
7. FIT_XY = fill

Ex :- Image.asset('assets/images/your_image.png',fit: BoxFit.fill)

So you should use Cover to achieve the CENTER_CROP result.

EDIT:

The problem should be crossAxisAlignment of the Column widget.
Setting this property to crossAxisAlignment: CrossAxisAlignment.stretch should fix your issue.

How can you center crop a Widget in Flutter?

Finally solved it. There were a few missing pieces:

1. I needed an OverflowBox with no restrictions so that my child could grow as large as needed.
2. I needed the child of FittedBox to actually enforce a size to stop the layout system from crashing.
3. Now that my widget will paint outside of its bounds, we also want to put a ClipRect in there to stop this from happening.

final Size size = controller.value.size;
return new ClipRect(
  child: new OverflowBox(
    maxWidth: double.infinity,
    maxHeight: double.infinity,
    alignment: Alignment.center,
    child: new FittedBox(
      fit: BoxFit.cover,
      alignment: Alignment.center,
      child: new Container(
        width: size.width,
        height: size.height,
        child: new VideoPlayer(controller)
      )
    )
  )
);

How do I automatically scale images in flutter to fit every resolution without overflow and scrolling?

Looking at your code you have at least two different problems.

1. Setting the correct image fit - You can use BoxFit.contain in Image.asset(fit: boxFit.contain, .... ) to make sure it is resized to be contained inside it's parent.
2. You have a Column and want the first child to take all the available width. Hence you should nest it inside Expanded widget.

ie. structurally something like:

Column(
  children: [
    Expanded(
      // your image goes here which will take as much height as possible.
      child: Image.asset('asset', fit: BoxFit.contain),
    ),
    Container(
      // your button bar which takes up the rest of the height
      child: MaterialButton( ... ),
    ),
  ],
);

I left out quite a bit, but i hope you get the gist.

How do I crop an image in Flutter?

I would probably use a BoxDecoration with a DecorationImage. You can use the alignment and fit properties to determine how your image is cropped. You can use an AspectRatio widget if you don't want to hard code a height on the Container.

import 'package:flutter/material.dart';

void main() {
  runApp(new MaterialApp(
    home: new MyHomePage(),
  ));
}

class MyHomePage extends StatelessWidget {

  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Image Crop Example"),
      ),
      body: new Center(
        child: new AspectRatio(
          aspectRatio: 487 / 451,
          child: new Container(
            decoration: new BoxDecoration(
              image: new DecorationImage(
                fit: BoxFit.fitWidth,
                alignment: FractionalOffset.topCenter,
                image: new NetworkImage('https://i.stack.imgur.com/lkd0a.png'),
              )
            ),
          ),
        ),
      ),
    );
  }
}

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