Flutter响应

Response

Flutter UI package which will help you to build your responsive UI design as you wanted to be on any device as it recreates every widget to fit the device display size on which the app is working.

Features

• Easy to use, with so few but yet powerful methods.
• Fast, very reliable and readable.
• Saves you a lot of time trying to fit widget size to different displays.
• Works on any Android/ IOS device (including iPad).
• Works in Portrait mode or Landscape mode on the same device.

How to use

First wrap your MaterialApp widget with Response.

     Response(
      originalScreenHeight: 759,
      originalScreenWidth: 392,
      child: MaterialApp(
        home: HomePage(),
      ),
    )

Note: Responsive needs to be at the top of your Widget Tree to be able to work and rebulid the widgets to a new size as the device display changes.

Note: if you want to use any functions features related to MediaQuery you must change the order to make the Response widget a child to the MaterialApp widget.

Second declare an instance response of ResponseUI() class at the top of your file.

final response = ResponseUI.instance;

And that is all to be able to initialize the package, Very easy!

to use the package on your widget you have 4 easy to use methods:

Name	Description
response.setWidth(width)	Sets the widget width in pixels value to be relatively constant across all different display sizes.
response.setHeight(height)	Sets the widget height in pixels value to be relatively constant across all different display sizes.
response.setFontSize(fontSize)	Sets the text size in pixels to be relativly constant on all diplays sizes.
response.isDevicePortrait	Helpful if you want to know whether the device orientation is in Portrait or in Landscape.
response.inMobilePortrait	Helps you if you want to know whether the device you are working on a Mobile Portrait (returns true) or a Tablet Portrait mode (returns false).
response.screenWidth	returns the current device screen width as of type double.
response.screenPixelRatio	returns the current device screen ratio. (using MediaQuery)
response.textScaleFactor	returns the font scalling factore as of type double. (using MediaQuery)
response.bottomPadding	returns the current device screen padding offset from the bottom. (using MediaQuery)
response.topPadding	returns the current device screen padding offset from the top. (using MediaQuery)

Note: isDevicePortrait and inMobilePortrait returns a bool (true or false) with which you can know the current orientation state of your device.

Height and Width

to set a width and height to for example a Container.

//We want the Container Widget to be 200px in width and 200px in height
    Container(
        width: response.setWidth(300), //setting the Container width to be 300px
        height: response.setHeight(200), //setting the Container height to be 300px
        color: Colors.teal,
       )

Note: the scaling process will work also in the same device in both in Portrait mode or in Landscape mode.

Text Size

to set the text size.

    Text(
        'This is a Test Text',
        style: TextStyle(
           fontSize: response.setFontSize(24), //defined a fixed font size in pixels
           fontWeight: FontWeight.bold,
    ),
)

Getting Screen Width & Height

    TextSpan(
      text: '\nScreen Height: ${response.screenHeight}px\n', //we are getting back our current device screen 
      //height in pixels.
      style: TextStyle(
        color: Colors.black,
        fontSize: response.setFontSize(18),
      ),
    ),
    TextSpan(
      text: 'Screen Width: ${response.screenWidth}px', //we are getting back our current device screen 
      //width in pixels.
      style: TextStyle(
        color: Colors.black,
        fontSize: response.setFontSize(18),
      ),
    ),

Contributions

If you feel like you can contribute to make the package much better and more useful for other developers, don't hesitate to fork the repo and make pull request to your changes.

Source code on Github: here

Inspired

This package was inspired by Prateek Sharma's great custom responsive UI project.