How to make flutter app responsive according to different screen size

Question

I am facing difficulties to make it responsive according to various screen sizes  How to make it responsive   override        Widget build BuildContext context           return new Container         decoration  new BoxDecoration color  Colors white          child  new Stack          children              new Padding              padding  const EdgeInsets only bottom  350 0               child  new GradientAppBar  quot   quot                           new Positioned              bottom  150 0              height  260 0              left  10 0              right  10 0              child  new Padding                padding  new EdgeInsets all 10 0                 child  new Card                  child  new Column                    mainAxisSize  MainAxisSize min                    children   lt Widget gt                       const ListTile                        title  const Text                           LOGIN                           textAlign  TextAlign center                          style  const TextStyle                            fontSize  16 50                            fontFamily   quot Helvetica quot                             fontWeight  FontWeight bold                            color  Colors black87                            letterSpacing  1 00                                                                                                 new ListTile                        leading  const Icon Icons person                         title  new TextField                          controller   user1                          decoration  new InputDecoration                              labelText        Enter a username                                                                        new ListTile                        leading  const Icon Icons person pin                         title  new TextField                          controller   pass1                          decoration  new InputDecoration                              labelText        Enter a password                            obscureText  true                                                                                                                                                 new Positioned              bottom  70 0              left  15 0              right  05 0              child  new ButtonTheme bar                 make buttons use the appropriate styles for cards               child  new ButtonBar                  children   lt Widget gt                     new FlatButton                      padding  new EdgeInsets only right  13 0                       child  new Text                         REGISTER HERE                         style  new TextStyle                            color  Colors black87                            fontFamily   quot Helvetica quot                             fontSize  15 00                            fontWeight  FontWeight bold                                              onPressed                             Navigator of context  pushNamed   facebook                                                                  new FlatButton                      padding  new EdgeInsets only right  22 0                       child  new Text                         FORGOT PASSWORD                          style  new TextStyle                            color  Colors black87                            fontFamily   quot Helvetica quot                             fontSize  15 00                            fontWeight  FontWeight bold                                              onPressed                             Navigator of context  pushNamed   Forgot                                                                                                                          new Positioned              bottom  73 0              height  180 0              left  20 0              right  52 0              child  new Padding                padding  new EdgeInsets all 0 00                 child  new ButtonTheme                  minWidth  10 0                  height  20 0                  padding  new EdgeInsets only right  37 0                   child  new ButtonBar children   lt Widget gt                     new CupertinoButton                        borderRadius                            const BorderRadius all const Radius circular 36 0                          padding  new EdgeInsets only left  70 0                         color  const Color 0xFF426DB7                         child  new Text                           quot      LOGIN                             quot                           style  new TextStyle                              color  Colors white                              fontSize  12 50                              fontFamily   quot Handwriting quot                               fontWeight  FontWeight w500                              letterSpacing  0 00                                                  onPressed

User · Answer

Used ResponsiveBuilder or ScreenTypeLayout import  package flutter material dart   import  package flutter widgets dart   import  package responsive builder responsive builder dart    class Sample extends StatelessWidget      override   Widget build BuildContext context        return Scaffold        appBar  AppBar          elevation  0          backgroundColor  Colors black                 body  ResponsiveBuilder          builder   context  info              var screenType   info deviceScreenType            String  text            switch  screenType               case DeviceScreenType desktop                   text    Desktop                 break                            case DeviceScreenType tablet                   text    Tablet                 break                            case DeviceScreenType mobile                   text    Mobile                 break                            case DeviceScreenType watch                   text    Watch                 break                            default                return null                        return Center child  Text  text  style  TextStyle fontSize  32  color  Colors black                                           screen type layout ScreenTypeLayout builder    mobile  MobilePage      tablet  TabletPage      desktop  DesktopPage      watch  Watchpage

User · Answer

Width  MediaQuery of context  size width   Height  MediaQuery of context  size height

User · Answer

My approach to the problem is similar to the way datayeah did it  I had a lot of hardcoded width and height values and the app looked fine on a specific device  So I got the screen height of the device and just created a factor to scale the hardcoded values   double heightFactor   MediaQuery of context  size height 708   where 708 is the height of the specific device

User · Answer

Using MediaQuery class   MediaQueryData queryData  queryData   MediaQuery of context        MediaQuery  Establishes a subtree in which media queries resolve   to the given data       MediaQueryData  Information about a piece of media  e g   a   window     To get Device Pixel Ratio   queryData devicePixelRatio   To get width and height of the device screen   queryData size width queryData size height   To get text scale factor   queryData textScaleFactor   Using AspectRatio class   From doc      A widget that attempts to size the child to a specific aspect ratio       The widget first tries the largest width permitted by the layout   constraints  The height of the widget is determined by applying the   given aspect ratio to the width  expressed as a ratio of width to   height       For example  a 16 9 width height aspect ratio would have a value of   16 0 9 0  If the maximum width is infinite  the initial width is determined by applying the aspect ratio to the maximum height       Now consider a second example  this time with an aspect ratio of 2 0   and layout constraints that require the width to be between 0 0 and   100 0 and the height to be between 0 0 and 100 0  We ll select a width of 100 0  the biggest allowed  and a height of 50 0  to match the   aspect ratio       example new Center   child  new AspectRatio    aspectRatio  100   100    child  new Container      decoration  new BoxDecoration        shape  BoxShape rectangle        color  Colors orange                           Also you can use    LayoutBuilder FittedBox CustomMultiChildLayout

User · Answer

padding  EdgeInsets only        left  4 0        right  ResponsiveWidget isSmallScreen context    4  74    Check for screen type       top  10        bottom  40     This is fine by Google s recommendation but may be not perfect

User · Answer

create file name  app config dart  in folder name responsive screen  in lib folder   import  package flutter material dart    class AppConfig     BuildContext  context    double  height    double  width    double  heightPadding    double  widthPadding     AppConfig this  context        MediaQueryData  queryData   MediaQuery of  context        height    queryData size height   100 0       width    queryData size width   100 0       heightPadding        height -    queryData padding top    queryData padding bottom    100 0        widthPadding          width -   queryData padding left    queryData padding right    100 0         double rH double v       return  height   v         double rW double v        return  width   v         double rHP double v        return  heightPadding   v        double rWP double v       return  widthPadding   v         then   import  responsive screen app config dart        class RandomWordsState extends State lt RandomWords gt      AppConfig  ac           override   Widget build BuildContext context         ac   AppConfig context               return Scaffold        body  Container          height   ac rHP 50           width   ac rWP 50           color  Colors red          child  Text  Test

User · Answer

This class will help and then initialize the class with the init method   import  package flutter widgets dart    class SizeConfig     static MediaQueryData  mediaQueryData    static double screenWidth    static double screenHeight    static double blockSizeHorizontal    static double blockSizeVertical    static double  safeAreaHorizontal    static double  safeAreaVertical    static double safeBlockHorizontal    static double safeBlockVertical     void init BuildContext context        mediaQueryData   MediaQuery of context       screenWidth    mediaQueryData size width      screenHeight    mediaQueryData size height      blockSizeHorizontal   screenWidth 100      blockSizeVertical   screenHeight 100       safeAreaHorizontal    mediaQueryData padding left            mediaQueryData padding right       safeAreaVertical    mediaQueryData padding top            mediaQueryData padding bottom      safeBlockHorizontal    screenWidth -  safeAreaHorizontal  100      safeBlockVertical    screenHeight -  safeAreaVertical  100          then in your widgets dimension do this  Widget build BuildContext context        SizeConfig   init context       return Container      height  SizeConfig safeBlockVertical   10    10 for example     width  SizeConfig safeBlockHorizontal   10    10 for example           All the credits to this post author  https   medium com flutter-community flutter-effectively-scale-ui-according-to-different-screen-sizes-2cb7c115ea0a

User · Answer

check out this page from flutter wiki    Creating Responsive Apps     Use the LayoutBuilder class  From its builder property  you get a   BoxConstraints  Examine the constraint s properties to decide what to   display  For example  if your maxWidth is greater than your width   breakpoint  return a Scaffold object with a row that has a list on the   left  If it s narrower  return a Scaffold object with a drawer   containing that list  You can also adjust your display based on the   device s height  the aspect ratio  or some other property  When the   constraints change  e g  the user rotates the phone  or puts your app   into a tile UI in Nougat   the build function will rerun

User · Answer

You can use responsive helper package to make your app responsive  It s a very easy method to make your app responsive  Just take a look at the example page and then you ll figure it out how to use it

User · Answer

I ve been knocking other people s   datayeah  amp  Vithani Ravi  solutions a bit hard here  so I thought I d share my own attempt s  at solving this variable screen density scaling problem or shut up  So I approach this problem from a solid fixed foundation  I base all my scaling off a fixed  immutable  ratio of 2 1  height width   I have a helper class  McGyver  that does all the heavy lifting  and useful code finessing  across my app  This  McGyver  class contains only static methods and static constant class members   RATIO SCALING METHOD  I scale both width  amp  height independently based on the 2 1 Aspect Ratio  I take width  amp  height input values and divide each by the width  amp  height constants and finally compute an adjustment factor by which to scale the respective width  amp  height input values  The actual code looks as follows   import  dart math   import  package flutter material dart    class McGyver      static const double  fixedWidth   410        Set to an Aspect Ratio of 2 1  height width    static const double  fixedHeight   820       Set to an Aspect Ratio of 2 1  height width         Useful rounding method   andyw solution - gt  https   stackoverflow com questions 28419255 how-do-you-round-a-double-in-dart-to-a-given-degree-of-precision-after-the-decim 53500405 53500405    static double roundToDecimals double val  int decimalPlaces       double mod   pow 10 0  decimalPlaces       return   val   mod  round   toDouble     mod             The  Ratio-Scaled  Widget method  takes any generic widget and returns a  Ratio-Scaled Widget  -  rsWidget     static Widget rsWidget BuildContext ctx  Widget inWidget  double percWidth  double percHeight            ----------------------------------------------------------------------------------------------           INFO  Ratio-Scaled  SizedBox  Widget - Scaling based on device s height  amp  width at 2 1 ratio             ----------------------------------------------------------------------------------------------         final int  decPlaces   5      final double  fixedWidth   McGyver  fixedWidth      final double  fixedHeight   McGyver  fixedHeight       Size  scrnSize   MediaQuery of ctx  size                    Extracts Device Screen Parameters      double  scrnWidth    scrnSize width floorToDouble           Extracts Device Screen maximum width      double  scrnHeight    scrnSize height floorToDouble         Extracts Device Screen maximum height       double  rsWidth   0      if   scrnWidth     fixedWidth         If input width matches fixedWidth then do normal scaling         rsWidth   McGyver roundToDecimals   scrnWidth    percWidth   100     decPlaces         else        If input width  match fixedWidth then do adjustment factor scaling        double  scaleRatioWidth   McGyver roundToDecimals   scrnWidth    fixedWidth    decPlaces         double  scalerWidth     percWidth   log percWidth   1     pow 1   scaleRatioWidth     100         rsWidth   McGyver roundToDecimals   scrnWidth    scalerWidth    decPlaces              double  rsHeight   0      if   scrnHeight     fixedHeight         If input height matches fixedHeight then do normal scaling         rsHeight   McGyver roundToDecimals   scrnHeight    percHeight   100     decPlaces         else        If input height  match fixedHeight then do adjustment factor scaling        double  scaleRatioHeight   McGyver roundToDecimals   scrnHeight    fixedHeight    decPlaces         double  scalerHeight     percHeight   log percHeight   1     pow 1   scaleRatioHeight     100         rsHeight   McGyver roundToDecimals   scrnHeight    scalerHeight    decPlaces                 Finally  hand over Ratio-Scaled  SizedBox  widget to method call      return SizedBox        width   rsWidth        height   rsHeight        child  inWidget                               Then you would individually scale your widgets  which for my perfectionist disease is ALL of my UI  with a simple static call to the  rsWidget    method as follows        Step 1  Define your widget however you like  this widget will be supplied as the  inWidget  arg to the  rsWidget  method in Step 2       Widget  btnLogin   RaisedButton color  Colors blue  elevation  9 0                                     shape  RoundedRectangleBorder borderRadius  BorderRadius circular McGyver rsDouble context  ScaleType width  2 5                                       child  McGyver rsText context   LOGIN   percFontSize  EzdFonts button2 5  textColor  Colors white  fWeight  FontWeight bold                                     onPressed        onTapBtnLogin  tecUsrId text   tecUsrPass text               Step 2  Scale your widget by calling the static  rsWidget  method      McGyver rsWidget context   btnLogin  34 5  10 0          and Bob s your uncle     The cool thing is that the  rsWidget    method returns a widget   So you can either assign the scaled widget to another variable like  rsBtnLogin for use all over the place - or you could simply use the full McGyver rsWidget   method call in-place inside your build   method  exactly how you need it to be positioned in the widget tree  and it will work perfectly as it should   For those more astute coders  you will have noticed that I used two additional ratio-scaled methods McGyver rsText   and McGyver rsDouble    not defined in the code above  in my RaisedButton   - so I basically go crazy with this scaling stuff   because I demand my apps to be absolutely pixel perfect at any scale or screen density   I ratio-scale my ints  doubles  padding  text  everything that requires UI consistency across devices   I scale my texts based on width only  but specify which axis to use for all other scaling  as was done with the ScaleType width enum used for the McGyver rsDouble   call in the code example above    I know this is crazy - and is a lot of work to do on the main thread - but I am hoping somebody will see my attempt here and help me find a better  more light-weight  solution to my screen density 1 1 scaling nightmares

User · Answer

This issue can be solved using MediaQuery of context   To get Screen width  MediaQuery of context  size width  To get Screen height  MediaQuery of context  size height  For more information about MediaQuery Widget watch  https   www youtube com watch v A3WrA4zAaPw

User · Answer

Place dependency in pubspec yaml  flutter responsive screen   1 0 0  Function hp   Screen MediaQuery of context  size  hp  Function wp   Screen MediaQuery of context  size  wp   Example   return Container height  hp 27  weight  wp 27

User · Answer

You can take a percentage of the width or height as input for scale size  fontSize  MediaQuery of  ctxt  size height   0 065  Where the multiplier at the end has a value that makes the Text look good for the active emulator  Below is how I set it up so all the scaled dimensions are centralized in one place   This way you can adjust them easily and quickly rerun with Hot Reload without having to look for the Media of   calls throughout the code   Create the file to store all the mappings appScale dart       class AppScale         BuildContext  ctxt             AppScale this  ctxt              double get labelDim   gt  scaledWidth  04         double get popupMenuButton   gt  scaledHeight  065           double scaledWidth double widthScale            return MediaQuery of  ctxt  size width   widthScale                     double scaledHeight double heightScale            return MediaQuery of  ctxt  size height   heightScale                   Then reference that where ever you need the scaled value       AppScale  scale   AppScale context                     Widget label1   Text         quot Some Label quot         style  TextStyle fontSize   scale labelDim            Thanks to answers in this post

User · Answer

You can use MediaQuery for parent s dimension or FractionallySizedBox as containers

User · Answer

An Another approach    easier for flutter web class SampleView extends StatelessWidget    override Widget build BuildContext context     return Center    child  Container      width  200      height  200      color  Responsive   getResponsiveValue          forLargeScreen  Colors red          forMediumScreen  Colors green          forShortScreen  Colors yellow          forMobLandScapeMode  Colors blue          context  context          You dodn t need to provide the values for every        parameter except shortScreen  amp  context         but default its provide the value as ShortScreen for Larger and        mediumScreen                          utility            class Responsive                  function reponsible for providing value according to screensize             getResponsiveValue                   dynamic forShortScreen                  dynamic forMediumScreen                  dynamic forLargeScreen                  dynamic forMobLandScapeMode                  BuildContext context                    if  isLargeScreen context                      return forLargeScreen    forShortScreen                  else if  isMediumScreen context                      return forMediumScreen    forShortScreen                              else if  isSmallScreen context   amp  amp  isLandScapeMode context                      return forMobLandScapeMode    forShortScreen                  else                   return forShortScreen                                                       isLandScapeMode BuildContext context                  if  MediaQuery of context  orientation    Orientation landscape                    return true                  else                   return false                                                       static bool isLargeScreen BuildContext context                  return getWidth context   gt  1200                                       static bool isSmallScreen BuildContext context                  return getWidth context   lt  800                                       static bool isMediumScreen BuildContext context                  return getWidth context   gt  800  amp  amp  getWidth context   lt  1200                                       static double getWidth BuildContext context                  return MediaQuery of context  size width

User · Answer

Easiest way to make responsive UI for different screen size is Sizer plugin   Make responsive UI in any screen size device also tablet  Check it this plugin    https   pub dev packages sizer  h  - for widget height  w  - for widget width  sp - for font size  Use  h   w   sp after value like this    Example  Container    height  10 0 h     10  of screen height   width  80 0 w      80  of screen width   child  Text  Sizer   style  TextStyle fontSize  12 0 sp        I have build many responsive App with this plugin

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After much research and testing  I have developed a solution for an app I m currently converting from Android iOS to Flutter   With Android and iOS I used a  Scaling Factor  applied to base font sizes  rendering text sizes that were relative to the screen size   This article was very helpful  https   medium com flutter-community flutter-effectively-scale-ui-according-to-different-screen-sizes-2cb7c115ea0a  I created a StatelessWidget to get the font sizes of the Material Design typographical styles  Getting device dimensions using MediaQuery  calculating a scaling factor  then resetting the Material Design text sizes  The Widget can be used to define a custom Material Design Theme   Emulators used    Pixel C - 9 94  Tablet Pixel 3 - 5 46  Phone iPhone 11 Pro Max - 5 8  Phone   With standard font sizes  With scaled font sizes  set app theme dart  SetAppTheme Widget   import  package flutter material dart   import  dart math    class SetAppTheme extends StatelessWidget      final Widget child     SetAppTheme  this child        override   Widget build BuildContext context         final  divisor   400 0       final MediaQueryData  mediaQueryData   MediaQuery of context        final  screenWidth    mediaQueryData size width      final  factorHorizontal    screenWidth    divisor       final  screenHeight    mediaQueryData size height      final  factorVertical    screenHeight    divisor       final  textScalingFactor   min  factorVertical   factorHorizontal        final  safeAreaHorizontal    mediaQueryData padding left    mediaQueryData padding right      final  safeFactorHorizontal     screenWidth -  safeAreaHorizontal     divisor       final  safeAreaVertical    mediaQueryData padding top    mediaQueryData padding bottom      final  safeFactorVertical     screenHeight -  safeAreaVertical     divisor       final  safeAreaTextScalingFactor   min  safeFactorHorizontal   safeFactorHorizontal        print  Screen Scaling Values       screenWidth    screenWidth        print  Screen Scaling Values       factorHorizontal    factorHorizontal          print  Screen Scaling Values       screenHeight    screenHeight        print  Screen Scaling Values       factorVertical    factorVertical          print   textScalingFactor    textScalingFactor          print  Screen Scaling Values       safeAreaHorizontal    safeAreaHorizontal         print  Screen Scaling Values       safeFactorHorizontal    safeFactorHorizontal          print  Screen Scaling Values       safeAreaVertical    safeAreaVertical         print  Screen Scaling Values       safeFactorVertical    safeFactorVertical          print   safeAreaTextScalingFactor    safeAreaTextScalingFactor          print  Default Material Design Text Themes        print  display4    Theme of context  textTheme display4         print  display3    Theme of context  textTheme display3         print  display2    Theme of context  textTheme display2         print  display1    Theme of context  textTheme display1         print  headline    Theme of context  textTheme headline         print  title    Theme of context  textTheme title         print  subtitle    Theme of context  textTheme subtitle         print  body2    Theme of context  textTheme body2         print  body1    Theme of context  textTheme body1         print  caption    Theme of context  textTheme caption         print  button    Theme of context  textTheme button          TextScalingFactors  textScalingFactors   TextScalingFactors          display4ScaledSize   Theme of context  textTheme display4 fontSize    safeAreaTextScalingFactor           display3ScaledSize   Theme of context  textTheme display3 fontSize    safeAreaTextScalingFactor           display2ScaledSize   Theme of context  textTheme display2 fontSize    safeAreaTextScalingFactor           display1ScaledSize   Theme of context  textTheme display1 fontSize    safeAreaTextScalingFactor           headlineScaledSize   Theme of context  textTheme headline fontSize    safeAreaTextScalingFactor           titleScaledSize   Theme of context  textTheme title fontSize    safeAreaTextScalingFactor           subtitleScaledSize   Theme of context  textTheme subtitle fontSize    safeAreaTextScalingFactor           body2ScaledSize   Theme of context  textTheme body2 fontSize    safeAreaTextScalingFactor           body1ScaledSize   Theme of context  textTheme body1 fontSize    safeAreaTextScalingFactor           captionScaledSize   Theme of context  textTheme caption fontSize    safeAreaTextScalingFactor           buttonScaledSize   Theme of context  textTheme button fontSize    safeAreaTextScalingFactor         return Theme        child  child        data   buildAppTheme  textScalingFactors                 final ThemeData customTheme   ThemeData    primarySwatch  appColorSwatch       fontFamily  x      final MaterialColor appColorSwatch   MaterialColor 0xFF3787AD  appSwatchColors    Map lt int  Color gt  appSwatchColors       50    Color 0xFFE3F5F8     100   Color 0xFFB8E4ED     200   Color 0xFF8DD3E3     300   Color 0xFF6BC1D8     400   Color 0xFF56B4D2     500   Color 0xFF48A8CD     600   Color 0xFF419ABF     700   Color 0xFF3787AD     800   Color 0xFF337799     900   Color 0xFF285877        buildAppTheme  TextScalingFactors textScalingFactors       return customTheme copyWith       accentColor  appColorSwatch 300       buttonTheme  customTheme buttonTheme copyWith buttonColor  Colors grey 500         cardColor  Colors white      errorColor  Colors red      inputDecorationTheme  InputDecorationTheme border  OutlineInputBorder          primaryColor  appColorSwatch 700       primaryIconTheme  customTheme iconTheme copyWith color  appColorSwatch       scaffoldBackgroundColor  Colors grey 100       textSelectionColor  appColorSwatch 300       textTheme   buildAppTextTheme customTheme textTheme  textScalingFactors       appBarTheme  customTheme appBarTheme copyWith          textTheme   buildAppTextTheme customTheme textTheme  textScalingFactors           accentColorBrightness          accentIconTheme          accentTextTheme          appBarTheme          applyElevationOverlayColor          backgroundColor          bannerTheme          bottomAppBarColor          bottomAppBarTheme          bottomSheetTheme          brightness          buttonBarTheme          buttonColor          canvasColor          cardTheme          chipTheme          colorScheme          cupertinoOverrideTheme          cursorColor          dialogBackgroundColor          dialogTheme          disabledColor          dividerColor          dividerTheme          floatingActionButtonTheme          focusColor          highlightColor          hintColor          hoverColor          iconTheme          indicatorColor          materialTapTargetSize          pageTransitionsTheme          platform          popupMenuTheme          primaryColorBrightness          primaryColorDark          primaryColorLight          primaryTextTheme          secondaryHeaderColor          selectedRowColor          sliderTheme          snackBarTheme          splashColor          splashFactory          tabBarTheme          textSelectionHandleColor          toggleableActiveColor          toggleButtonsTheme          tooltipTheme          typography          unselectedWidgetColor            class TextScalingFactors      final double display4ScaledSize    final double display3ScaledSize    final double display2ScaledSize    final double display1ScaledSize    final double headlineScaledSize    final double titleScaledSize    final double subtitleScaledSize    final double body2ScaledSize    final double body1ScaledSize    final double captionScaledSize    final double buttonScaledSize     TextScalingFactors         required this display4ScaledSize       required this display3ScaledSize       required this display2ScaledSize       required this display1ScaledSize       required this headlineScaledSize       required this titleScaledSize       required this subtitleScaledSize       required this body2ScaledSize       required this body1ScaledSize       required this captionScaledSize       required this buttonScaledSize          TextTheme  buildAppTextTheme       TextTheme  customTextTheme      TextScalingFactors  scaledText       return  customTextTheme copyWith       display4   customTextTheme display4 copyWith fontSize   scaledText display4ScaledSize       display3   customTextTheme display3 copyWith fontSize   scaledText display3ScaledSize       display2   customTextTheme display2 copyWith fontSize   scaledText display2ScaledSize       display1   customTextTheme display1 copyWith fontSize   scaledText display1ScaledSize       headline   customTextTheme headline copyWith fontSize   scaledText headlineScaledSize       title   customTextTheme title copyWith fontSize   scaledText titleScaledSize       subtitle   customTextTheme subtitle copyWith fontSize   scaledText subtitleScaledSize       body2   customTextTheme body2 copyWith fontSize   scaledText body2ScaledSize       body1   customTextTheme body1 copyWith fontSize   scaledText body1ScaledSize       caption   customTextTheme caption copyWith fontSize   scaledText captionScaledSize       button   customTextTheme button copyWith fontSize   scaledText buttonScaledSize        apply bodyColor  Colors black        main dart  Demo App   import  package flutter material dart   import  package scaling set app theme dart     void main     gt  runApp MyApp       class MyApp extends StatelessWidget       override   Widget build BuildContext context         return MaterialApp        home  SetAppTheme child  HomePage                    class HomePage extends StatelessWidget      final demoText    0123456789       override   Widget build BuildContext context         return SafeArea        child  Scaffold          appBar  AppBar            title  Text  Text Scaling with SetAppTheme               style  TextStyle color  Colors white                        body  SingleChildScrollView            child  Center              child  Padding                padding  const EdgeInsets all 8 0                 child  Column                  children   lt Widget gt                     Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme display4 fontSize                                                                Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme display3 fontSize                                                                Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme display2 fontSize                                                                Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme display1 fontSize                                                                Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme headline fontSize                                                                Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme title fontSize                                                                Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme subtitle fontSize                                                                Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme body2 fontSize                                                                Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme body1 fontSize                                                                Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme caption fontSize                                                                Text                      demoText                      style  TextStyle                        fontSize  Theme of context  textTheme button fontSize

User · Answer

What i do is to take screen width and height and calculate a grid of 100 100 out of it to position and scale things and save it as static variables that can be reused  Works quite good in most cases  Like this   AppConfig width   MediaQuery of context  size width  AppConfig height   MediaQuery of context  size height  AppConfig blockSize   AppConfig width   100  AppConfig blockSizeVertical   AppConfig height   100    Then i scale everything according to these values  like this   double elementWidth   AppConfig blockSize   10 0       10  of the screen width   or   double fontSize   AppConfig blockSize   1 2    Sometimes the safe area  notch  etc  kills a layout  so you can consider this  too   AppConfig safeAreaHorizontal   MediaQuery of context  padding left       MediaQuery of context  padding right   double screenWidthWithoutSafeArea   AppConfig width - AppConfig safeAreaHorizontal    This worked great on some recent projects

User · Answer

Check MediaQuery class     For example  to learn the size of the current media  e g   the window containing your app   you can read the MediaQueryData size property from the MediaQueryData returned by MediaQuery of  MediaQuery of context  size    So you can do the following    new Container                        height  MediaQuery of context  size height 2

[flutter] How to make flutter app responsive according to different screen size?

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