dartflutter
I am curious about this. I have seen many example using Container() for dummy hidden widget, for example, when loading has completed, then we setState(() { _isLoaded = true; });.
So we can use the state like this, right?
return _isLoaded ? Container() : LoaderWidget();
Or maybe using SizedBox() is actually better because it don't take much parameters and often used for padding anyway?
return _isLoaded ? SizedBox() : LoaderWidget();
Or am I wrong?
Flutter Launcher Icons has been designed to help quickly generate launcher icons for both Android and iOS: https://pub.dartlang.org/packages/flutter_launcher_icons
I'm hoping to add a video to the GitHub README to demonstrate it
Video showing how to run the tool can be found here.
If anyone wants to suggest improvements / report bugs, please add it as an issue on the GitHub project.
Update: As of Wednesday 24th January 2018, you should be able to create new icons without overriding the old existing launcher icons in your Flutter project.
Update 2: As of v0.4.0 (8th June 2018) you can specify one image for your Android icon and a separate image for your iOS icon.
Update 3: As of v0.5.2 (20th June 2018) you can now add adaptive launcher icons for the Android app of your Flutter project
You can add the Text as a child to a Container that has a BoxDecoration with border property:
Container(
margin: const EdgeInsets.all(15.0),
padding: const EdgeInsets.all(3.0),
decoration: BoxDecoration(
border: Border.all(color: Colors.blueAccent)
),
child: Text('My Awesome Border'),
)
Best Answer
In case of use as a placeholder:
Container if the widget has no child, no height, no width, no constraints, and no alignment, but the parent provides bounded constraints, then Container expands to fit the constraints provided by the parent.
SizedBox if the widget has no child, no height, no width, then width and height are zero.
Therefore,
SizedBox()serves more as a syntactic placeholder.Also, note that SizedBox() is a
constconstructor but Container() is not. The first one allows the compiler to create more efficient code.