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This thesis will address problems of cross-platform software development for mobile devices. The author will analyze existing frameworks and tools; he will point out their major strengths and weaknesses. Based on this analysis, a pilot cross-platform application will be designed and implemented using the most versatile framework. Particular attention will be paid to the methodology of cross-platform development.

This thesis outlines description and comparison of currently used application development tools for mobile devices. The thesis compares especially development of native applications (for Android, iOS, BlackBerry, Windows Phone) with web-based solutions with regard to the multi-platform development. Moreover, the thesis presents implementation of an experimental application for Android as well as web-based application. Both implementations are described and compared including performance tests.

Diagrams are useful to visualize and design complex structures and relationships. They are frequently used in areas like software engineering or data flow management. There are a plethora of tools that allow a user to draw a diagram; however, they represent a diagram as an image. On the contrary, there are tools specifically designed to utilize a model behind the diagram, but they often lack in the area of user interaction and user interface. The thesis aims to try to bridge this gap, by providing a multiplatform implementation of diagram editing library in Flutter. By doing so, the library allows developers to focus on the utilization of the underlying diagram model. This will support the creation of new applications that offer modern user interface and utilize the diagram model. The library is not tailored to a single use-case or a diagram type. Instead, it focuses on general support of view or edit diagram operations. As Flutter can run in multiple environments, like mobile phones or web browsers, the library is designed to provide a user friendly experience for all of these platforms. The library design allows easy implementation and application in different areas, use-cases. This is demonstrated on two proof-of-concept diagram editing applications that use the library. 1

Title: Multi-platform environment for mobile-game development Author: Ivan Vacula Department: Department of Software Engineering Supervisor: RNDr. David Bednárek, Ph.D. Supervisor's e-mail address: bednarek@ksi.mff.cuni.cz Abstract: Smart mobile devices are getting more and more popular these days. But there comes a problem with their expansion as well. Mobile operating systems differ from each other, as do mobile devices themselves, so development across multiple platforms is not simple. Situation is even worse when it comes to games. These need to use limited resources of a mobile device as much as possible, taking into account quick response to user actions, graphical execution et cetera. The first goal of this thesis is to compare existing solutions for multi-platform mobile game development. The second goal is to design a new system. This system must ensure targeting of multiple platforms during mobile game development. Included in this thesis is implementation of the system on two vastly different operating systems as well as implementation of a demonstration game. Keywords: multi-platform, mobile, smartphone, game, development

Goal of this master thesis is to compare hybrid and UI frameworks for multiplatform mobile applications based on web technologies. Theoretical part deals with mobile platforms, with options to develop applications and with in-depth overview of multiplatform development of mobile applications. In the next part there are described two hybrid frameworks and five UI frameworks, these frameworks are compared and their result is used as source for creation of mobile application, which deals with pollen reports. The result of this thesis is overview and comparison of hybrid and UI frameworks. And an example of mobile application developments based on chosen frameworks.

This thesis describes the design of a multiplatform authentication system that enables user authentication by using a wide variety of authentication tokens. The theoretical part is devoted to an overview of authentication interfaces with focus on modern methods of verification. There is also an overview of authentication schemes. The practical part gives requirements for an authentication terminal and sets a specific hardware structure, including the specification of individual functional blocks. The implementation of the software logic uses Java and JavaScript programming languages. Attention is also paid to the used authentication schemes including details and comparison of used platforms. Finally, we evaluate the user and security aspects of the proposed solution. It is also given the possibility of additional hardware and software optimization.

This master thesis deals with creating of the cross-platform audio player with the possibility of its use in the speech-language pathology clinic. The theoretical part is focused on the comparison of two multi-platform libraries, of which was one chosen for creating of the player. Subsequently on functionality SQLite database, which was also used as part of the final application. The basis of the practical part is the creation of the cross-platform audio player which is extended about database of patients and also extended about speech signal analysis with the help of VST plugin.

This master's thesis deals with design of cross-platform application for risk analysis support. It describes risk management in information technology and methods which can be~used for risk management with emphasis on those that can be visualized. Possibilities for cross-platform development are described subsequently. Next, application for risk analysis support is designed and implemented. In the end of this thesis is shown how to use implemented application for risk analysis.

This thesis describes the development for mobile devices, with a focus on cross platform development. It introduces the most used tools for multiplatform development and their principles. It also deals with design and implementation of mobile application for iOS and Android operating systems. This application serves for management of time spent on various projects and tasks using graphs and statistics. It also provides tools for better management of team projects for small businesses and entrepreneurs.