\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{rotmac16}
\pdfinfo{
  /Title (cheatsheet-mobileapplication.pdf)
  /Creator (Cheatography)
  /Author (rotmac16)
  /Subject (Cheatsheet\_MobileApplication Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{1F58A3}
\definecolor{LightBackground}{HTML}{F1F4F9}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Cheatsheet\_MobileApplication Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{rotmac16} via \textcolor{DarkBackground}{\uline{cheatography.com/100637/cs/21739/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}rotmac16 \\
  \uline{cheatography.com/rotmac16} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 2nd March, 2020.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Get Started}}  \tn
% Row 0
\SetRowColor{LightBackground}
Install Flutter & \seqsplit{https://flutter.dev/docs/get-started/install} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
Install Android Studio & \seqsplit{https://flutter.dev/docs/get-started/editor?tab=androidstudio} \tn 
% Row Count 7 (+ 4)
% Row 2
\SetRowColor{LightBackground}
Install Flutter Plugin in Android Studio & File -\textgreater{} Settings -\textgreater{} Plugins -\textgreater{} Flutter \tn 
% Row Count 9 (+ 2)
% Row 3
\SetRowColor{white}
Iphone as Mobile Device & Buy Developer Account or use Emulator \tn 
% Row Count 11 (+ 2)
% Row 4
\SetRowColor{LightBackground}
Other Mobile Device & Connect using by USB and enable Developer Mode \tn 
% Row Count 14 (+ 3)
% Row 5
\SetRowColor{white}
Emulator & AVD Manager -\textgreater{} Create Virtual Device \tn 
% Row Count 16 (+ 2)
% Row 6
\SetRowColor{LightBackground}
Hot Reload & STRG+S -\textgreater{} App is updated automatically \tn 
% Row Count 18 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.8 cm} x{5.2 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{pubspec.yaml code}}  \tn
% Row 0
\SetRowColor{LightBackground}
add dependency example & cupertino\_icons: \textasciicircum{}0.1.2 \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
syntax & `dependencies:                                                flutter:                                                  sdk: flutter                                                cupertino\_icons: \textasciicircum{}0.1.2                                 +              english\_words: \textasciicircum{}3.1.5` \tn 
% Row Count 13 (+ 11)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.2 cm} x{4.8 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{main.dart code}}  \tn
% Row 0
\SetRowColor{LightBackground}
Importing from a package & `import \seqsplit{'package:flutter/material}.dart';` \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Run a class (e.g. MyApp()) & `void main() =\textgreater{} runApp(MyApp());` \tn 
% Row Count 4 (+ 2)
% Row 2
\SetRowColor{LightBackground}
Set title in appbar & `appBar: AppBar(           title: Text('Welcome to Flutter'),         )` \tn 
% Row Count 7 (+ 3)
% Row 3
\SetRowColor{white}
Set text in the body & `body: Center(           child: Text('Hello World'),         )` \tn 
% Row Count 10 (+ 3)
% Row 4
\SetRowColor{LightBackground}
display something in a list & `return ListTile(     title: Text(       pair.asPascalCase,       style: \_biggerFont,     )` \tn 
% Row Count 14 (+ 4)
% Row 5
\SetRowColor{white}
random words class & `class RandomWordsState extends State\textless{}RandomWords\textgreater{} \{   @override   Widget build(BuildContext context) \{     final wordPair = WordPair.random();     return \seqsplit{Text(wordPair.asPascalCase);}   \} \}` \tn 
% Row Count 22 (+ 8)
% Row 6
\SetRowColor{LightBackground}
set AppBar & `return Scaffold(     appBar: AppBar(       title: Text('Startup Name Generator'),     ),     body: \_buildSuggestions(),   );` \tn 
% Row Count 28 (+ 6)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}