main.tex

\documentclass[a4paper,9pt]{extarticle}
\usepackage[ngerman]{babel}
\usepackage{amsmath,amsthm,amsfonts,amssymb}
\usepackage{ascii}
\usepackage[adobe-utopia]{mathdesign}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[margin=0.5cm]{geometry}
\usepackage{multicol}
\usepackage{color,graphicx,overpic}
\usepackage{hyperref}
%Table imports
\newcommand{\ra}[1]{\renewcommand{\arraystretch}{#1}}
%Style imports
\usepackage[inline]{enumitem}
\usepackage{tcolorbox}
\usepackage{listings}
\usepackage{algorithm}
\usepackage{algpseudocode}
\usepackage{authblk}
\usepackage{fancyhdr}
\usepackage{fancyhdr}
\usepackage{datetime}
\usepackage[iso,german]{isodate}
%Graphic imports
\usepackage{tikz}
\graphicspath{ {./img/} }

% Turn off header and footer
\pagestyle{empty}

% Redefine section commands to use less space
\makeatletter
\renewcommand{\section}{\@startsection{section}{1}{0mm}%
                                {-1ex plus -.5ex minus -.2ex}%
                                {0.5ex plus .2ex}%x
                                {\normalfont\large\bfseries}}
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                                {0.5ex plus .2ex}%
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\renewcommand{\subsubsection}{\@startsection{subsubsection}{3}{0mm}%
                                {-1ex plus -.5ex minus -.2ex}%
                                {1ex plus .2ex}%
                                {\normalfont\small\bfseries}}
\renewcommand{\paragraph}{%
  \@startsection{paragraph}{4}%
  {\z@}{1ex \@plus 1ex \@minus .2ex}{-1em}%
  {\normalfont\normalsize\bfseries}%
}
\makeatother

% Define BibTeX command
\def\BibTeX{{\rm B\kern-.05em{\sc i\kern-.025em b}\kern-.08em
    T\kern-.1667em\lower.7ex\hbox{E}\kern-.125emX}}

% Don't print section numbers
\setcounter{secnumdepth}{0}

\setlength{\parindent}{0pt}
\setlength{\parskip}{0pt plus 0.5ex}

%My Environments
\newtheorem{example}[section]{Example}
% -----------------------------------------------------------------------
\definecolor{codegreen}{rgb}{0,0.6,0}
\definecolor{codegray}{rgb}{0.5,0.5,0.5}
\definecolor{codepurple}{rgb}{0.58,0,0.82}
\definecolor{backcolour}{rgb}{0.95,0.95,0.92}
\input{resources/lstlisting.tex}
\lstset{ %
    backgroundcolor=\color{backcolour},   
    commentstyle=\color{codegreen},
    keywordstyle=\color{magenta},
    numberstyle=\tiny\color{codegray},
    stringstyle=\color{codepurple},
    basicstyle=\scriptsize,
    breakatwhitespace=false,         
    breaklines=true,                 
    captionpos=b,                    
    keepspaces=true,                 
    numbers=none,                    
    numbersep=5pt,                  
    showspaces=false,                
    showstringspaces=false,
    showtabs=false,                  
    tabsize=2,
    frame=single,
    language=java,
    postbreak=\raisebox{0ex}[0ex][0ex]{\ensuremath{\color{black}\hookrightarrow\space}}
}
\algrenewcommand\algorithmicfunction{\textbf{algorithm}}
\newcommand{\code}[1]{\texttt{#1}}
\title{Mobile and GUI Engineering\\\large Android}
\author{Oliviero Chiodo\\ Stefano Kals}
\date{Herbstsemester 2015}
\affil{Hochschule für Technik Rapperswil}
\begin{document}
\maketitle
\clearpage
\raggedright
\footnotesize
\begin{multicols*}{3}

% multicol parameters
% These lengths are set only within the two main columns
%\setlength{\columnseprule}{0.25pt}
\setlength{\premulticols}{1pt}
\setlength{\postmulticols}{1pt}
\setlength{\multicolsep}{1pt}
\setlength{\columnsep}{2pt}
\input{grundlagen.tex}
\input{navigation.tex}
\input{design_patterns.tex}
\input{material_design.tex}
\input{persistenz_hintergrunddienste.tex}
\input{weitere_themen.tex}
\end{multicols*}
\end{document}