The wide-spread adoption of camera-embedded mobile devices along with the ubiquitous connection via WiFi or cellular networks enables people to visually report live events. Current solutions limit the configurability of such services by allowing video streaming only to fixed servers. In addition, the business models of the companies that provide such (free) services insert visual ads in the streamed videos, leading to unnecessary resource consumption. This thesis proposes an architecture of a real-time video streaming service from an Android mobile device to a server of the user's choice. The real-time video can then be viewed from a web browser. The project builds on open-source code and open protocols to implement a set of software components that successfully stream live video. Experimental evaluations show practical resource consumption and a good quality of the streamed video. Furthermore, the architecture is scalable and can support large number of simultaneous streams with additional increase in hardware resources.

abstract: Android has been the dominant platform in which most of the mobile development is being done. By the end of the second quarter of 2014, 84.7 percent of the entire world mobile phones market share had been captured by Android. The Android library internally uses the modified Linux kernel as the part of its stack. The I/O scheduler, is a part of the Linux kernel, responsible for scheduling data requests to the internal and the external memory devices that are attached to the mobile systems. The usage of solid state drives in the Android tablet has also seen a rise owing to its speed of operation and mechanical stability. The I/O schedulers that exist in the present Linux kernel are not better suited for handling solid state drives in particular to exploit the inherent parallelism offered by the solid state drives. The Android provides information to the Linux kernel about the processes running in the foreground and background. Based on this information the kernel decides the process scheduling and the memory management, but no such information exists for the I/O scheduling. Research shows that the resource management could be done better if the operating system is aware of the characteristics of the requester. Thus, there is a need for a better I/O scheduler that could schedule I/O operations based on the application and also exploit the parallelism in the solid state drives. The scheduler proposed through this research does that. It contains two algorithms working in unison one focusing on the solid state drives and the other on the application awareness. The Android application context aware scheduler has the features of increasing the responsiveness of the time sensitive applications and also increases the throughput by parallel scheduling of request in the solid state drive. The suggested scheduler is tested using standard benchmarks and real-time scenarios, the results convey that our scheduler outperforms the existing default completely fair queuing scheduler of the Android. / Dissertation/Thesis / Masters Thesis Computer Science 2014

Android is an open source mobile operating system contributed by Google. In general, Google Play is the most secure place to download the mobile applications for Android system. [1] Products from this website are surely safe promised by Google Company. But there are many other third-party app stores around the world offering similar software. One incentive for them is that the security policy on different platforms varies a lot, and Android developers are free to distribute apps in any intended ways, which leads to a certain risk in the assorted stores such as malware. Therefore, it is crucial to know which application store can be trusted from the various app stores. [2] To support our research, a tool named APK Safety Test is developed to compare the APK files from different application stores with the version on Google Play. In this study, nine stores around the world are chosen and 20 various applications from them are checked in real-time by using the tool. From this research, people can learn the different risk how can be detected. Furthermore, this paper analyzes the result of risks how to affect the applications. Keywords: Android application, Android Stores, APK files, Risk

Denna rapport beskriver utvecklandet av en applikation till operativsystemet Android. Här sätts utvecklingen av applikationen i förhållande till god användbarhet och hantering av resurser på en mindre plattform. En server med tillhörande databas kommunicerar med applikationen som klient. De båda utgör tillsammans helheten i ett system designat för bokningsbolaget Current and Able, verksamt i Sverige, som önskar presentera sitt utbud av exklusiva varor och tjänster direkt till fans av bolagets artister.   I projektet avhandlas grundläggande klasser och komponenter för utveckling av applikationer till Android och hur de bäst samverkar för att optimera användandet av resurser. Java användes huvudsakligen som programmeringsspråk. På serversidan utvecklades ett gränssnitt i PHP mot en MySQL databashanterare. / This study describes the development of an application for the operating system Android. We consider the developing of the application in relation to a good user experience and the managing of resources on a smaller device. A server with an appurtenant database communicates with the application as a client. Together they constitute a unity in a system designed to serve Current and Able, a managing and booking music agency in Sweden, who whishes to offer their supply of goods and services to the fans of their related artists.   In this project we deal with basic classes and components regarding development of Android applications and how they interact to achieve the best possible performance when using system resources. Java was the main programming language used. On the server side we developed a graphical user interface in PHP, targeting a MySQL database management system.

Den digitala tekniken utvecklas till olika användningsområden och antal mobila applikationer blir fler och fler både för privatlivet och yrkeslivet. Nu vill projektets uppdragsgivare Bygglet AB expandera mot den mobila marknaden med sin affärsidé. Företaget Bygglet AB arbetar i huvudsak mot byggbranschen och tillhandahåller det webbaserade projekthanteringsverktyget Bygglet. Denna uppsats behandlar examensarbetet med prototypen mobilapplikationen ByggletMobil. Rapporten innefattar både teoretisk och praktisk bakgrund, arbetet med implementationen och en motivation till att denna typ av digital teknik behövs inom byggnadsområdet. / Digital technology has been developed for different application areas and the number of mobile applications for both private and professional life is increasing. Now, the project's sponsor Bygglet AB is expanding to include the mobile market with their business idea. The company Bygglet AB works principally in the construction industry and provides the Web-based project management tool Bygglet. This dissertation presents a final year project on a prototype mobile application ByggletMobil. The report includes both a theoretical and practical background, work towards an implementation and a motivation for the need for this kind of digital technology in the construction area.

E-health systems are widely used in today’s world, and have a stillbrighter future with the rapid development of smart phones. A fewyears ago, e-health system could only be carried out on computers.But recently, people are using this as a phone application, so thatthey can get information at any time and anywhere. In addition,some smart phones can already measure heart rate and bloodpressure, for example, ‚Instant Heart Rate‛ and ‚Blood PressureMonitor‛. By using these kinds of applications, users can easilymeasure their health data and store them in their mobile phones.However, the problem of privacy has been attracting people’sattention. After uploading their data to the database, users do havethe right to protect their privacy. For instance, even the doctor hasthe authority to obtain the health record; the user's name can behidden, so that the doctor does not know who the owner of this datais. This problem also includes anonymization, pseudonymity,unlinkability, unobservability and many other aspects.In this thesis work, an android application is proposed to solve thisproblem. Users can set their own rules, and all data requests shouldbe dealt with by calling the rules. In addition, a module in the serveris to be developed to carry out the whole process of privacypreserving and the users’ data should be stored in the database.A standard for users to set rules is determined, which is bothdynamical and flexible. The application realizes some additional rulechecking functions to determine whether users have set a valid rule.Privacy rules can be created, deleted, or uploaded. In addition, userscan update their health record and upload it to the database. Theserver will call different protocols to deal with different requests, andthe data which obtains the requests is responded to by calling theusers’ own privacy rules.

The Master’s thesis is focused on development of Android application which is able to recognize grid and clue text of swedish crossword and find a solution for it in crossword dictionary. The thesis proposes a process of tile segmentation using corner detection, recognizes text using Tesseract OCR and searches for solutions in local database. Developed application is tested on a gallery of photos captured using a mobile phone. The tile segmentation and solution searching provide good results, the rest of the process provides unsatisfactory results thanks to inaccurate OCR output.

The demand for control systems that are highly capable of driving solid-state optoelectronic devices has significantly increased with the advancement of their efficiency and elevation of their current consumption. This work presents a closed-loop control system that is based on a microcontroller embedded system capable of driving high power optoelectronic devices. In this version of the system, the device in the center of control is a high-power red, green, and blue light emitting diode package. The system features a graphical user interface, namely an Android mobile phone application, in which the user can easily use to vary the light color and intensity of the light-emitting device wirelessly via Bluetooth. Included in the system is a feedback mechanism constituted by a red, green, and blue color sensor through which the user can use to observe feedback color information about the emitted light. The system has many commercial application including in-door lighting and research application including plant agriculture research fields.

The purpose of this thesis is to analyze a golfer’s movement and provide the feedback related to the golfer’s skill with the simple and novel ways. A golfer can easily measure golf swings and get feedback based on his performance using an Android smart phone without expensive or complicated devices. In this thesis, we designed and implemented an Android application using an accelerometer sensor to analyze swing data for identifying critical points and to give various kinds of feedback based on the data. The feedback helps golfers to understand their swing patterns, timing and speed so it makes them improve their skills.

Online shopping is becoming a popular option for consumers. Currently, the most common product searching method that online shopping websites provide is keyword search. Most shoppers have to carefully select relevant keywords to search for their favorite products. Finding desired products using a query image for online shopping is currently not available. Image has been used for searching similar images in the database but they are usually not well annotated. Research effort has been devoted to developing reliable image-based retrieval systems for applications such as medical image retrieval and trademark search. None of these developments focuses on improving online shopping experiences for consumers. This thesis reports the development of an image retrieval system to provide better online shopping experience for consumers. The system searches products with similar appearance such as shape and textures to the query images the user provides. Turn angle is a contour based shape descriptor. It has many unique properties that make it a perfect shape matching method for image retrieval. The best matching image has the shortest shape distance to the query shape. Turn angle, however, could fail with slightly stretched shapes. Dynamic programming is used to help turn angle match slightly deformed shapes. Another technique called centroid distance is also included as a restriction for shape matching in order to avoid retrieving irrelevant or disparate shapes. With a well-built database, the enhanced turn angle descriptor that includes dynamic programming and centroid distance is able to reach a high accuracy rate.Shape matching alone is usually not sufficient for a powerful retrieval system. Products with similar shape but very different textures will not be distinguished based solely on shape matching. Edge histogram is a robust shape descriptor for texture matching. It can be implemented to construct either global or local histogram for this purpose. Global edge histogram uses only 5 bins, which is simple but ignores detail texture information. Local and semi-global edge histograms are more complex but retains detail texture information. A hierarchical matching system is built to combine the shape and texture descriptors for better retrieval accuracy.Easy access to the shopping system is desired. An Android Application is developed to provide consumers a convenient and friendly tool to use the system. Grab cut is applied to the captured image to segment the object from the background. The segmentation provides the retrieval system the required contour information for shape matching. The Android Application submits the captured image along with the segmented contour to the server. After the retrieval process is completed, the server sends retrieved images of similar products back to the Android App for the user to consider. Using the retrieval system via a handheld device provides a user-friendly online shopping experience.