The goal of this thesis is to evaluate Android in context of other mobile operating system currently available on the market. I will mention history of Android, it's evolution and comparison with other mobile platforms. On the sample application I will introduce the principles of development for the Android operating system. Finally, I will describe monetization on real data provided by developers.

Vid bedömning av allmän daglig livsföring (ADL) försöker man analysera hur en människa med fysisk och/eller psykisk funktionsnedsättning kan utföra olika aktiviteter i det dagliga livet, såsom personlig hygien, matlagning och städning. Arbetsterapeuter utför den subjektiva bedömningen med hjälp av standardiserade checklistor. I vissa fall ger inte det en tillräckligt nyanserad bild av en persons förmåga och det finns behov av bättre ett system som kan användas vid ADL-bedömningar av personer med olika typer av funktionsnedsättning. Målet med detta projekt har varit att ta fram ett mobilt system för aktivitetsbedömning anpassat för hemmiljö. Systemet är uppdelat i två delsystem. Delsystem 1 består av en mobiltelefonapplikation anpassad för Android som tillsammans med en rörelsesensor registrerar aktiviteten hos en person. Delsystem 2 är en PC-mjukvara för Windows som dels lagrar insamlat data i en databas dels visar mätresultaten i form av grafer. Systemet har testats och utvärderats i hemmiljö vid några olika typer av enklare aktiviteter. / The assessment of Activities of Daily Living (ADL) seeks to analyze how well a person with physical and/or mental disabilities can perform various tasks in the daily life, such as personal hygiene, cooking and cleaning. Occupational therapists perform the subjective assessment using standardized checklists. These do not provide a sufficiently detailed picture of a person’s ability, so there is a need for an improved system that can be used for ADL assessment of people with different types of disabilities. The aim of this project has been to develop a mobile system for ADL assessment adapted for a home environment. The system is divided into two subsystems. Subsystem 1 consists of a mobile phone application for Android which, together with a motion sensor, records a person’s activity. Subsystem 2 is a Windows application that stores collected data in a database and displays the measurement results in the form of a graph. The system has been tested and evaluated in a home environment with some different types of simple activities.

Modern smartphone operating systems (OSs) have been developed with a greater emphasis on security and protecting privacy. One of the security mechanisms these systems use is permission system. We perform an analysis of the Android permission system in an attempt to begin answering some of the questions that have arisen about its design and implementation. We developed PScout, a tool that extracts the permission specification from the Android OS source code using static analysis and analyzed 5 versions of Android spanning version 2.2 up to the recently released Android 4.1. Our main findings are that while there is little redundancy in the permission specification, if applications could be constrained to only use documented APIs, then about 18-26% of the non-system permissions can be hidden. Finally, we find that a trade-off exists between enabling least-privilege security with fine-grained permissions and maintaining stability of the permission specification as the Android OS evolves.

This degree project deals with creating an Android application for managing representation orders placed in stores as well as evaluating Androids usage as a platform for that line of work. The evaluation will be based on tests of the application on an Android phone together with a survey consisting of written questions and a practical test of the application.

Denna rapport är inriktad på batteribesparing för platsbaserade applikationer i Android. Rapporten kommer att analysera och ge konkreta förslag på hur man på ett batterisnålt sätt implementerar lokalisering av Androidenhetersgeografiska position (latitud- och longitudkordinater) samt frekvent hämtning av data via HTTP från en back-end server. De lösningar som tas upp i den här rapporten är specifikt tillämpade för applikationen MyWorld men kan anpassas för vilken platsbaserad applikationen som helst med liknande behov. Målet är att förbättra och optimera utvalda områden som tidigare implementerats i den här applikationen. De nya optimerade lösningarna har genomgått två olika testscenarion där mätningarna visar att batteriförbrukningen har reducerats med 4,2% för applikationen då den aktivt körs och används samt 14,8% för applikationen då den är icke aktiv och enheten inte aktivt används.

A wide variety of smartphone applications today rely on third-party advertising services, which provide libraries that are linked into the hosting application. This situation is undesirable for both the application author and the advertiser. Advertising libraries require additional permissions, resulting in additional permission requests to users. Likewise, a malicious application could simulate the behavior of the advertising library, forging the user's interaction and effectively stealing money from the advertiser. This thesis describes AdSplit, where we extended Android to allow an application and its advertising to run as separate processes, under separate user-ids, eliminating the need for applications to request permissions on behalf of their advertising libraries. We also leverage mechanisms from QUIRE to allow the remote server to validate the authenticity of client-side behavior. In this thesis, we quantify the degree of permission bloat caused by advertising, with a study of thousands of downloaded apps. AdSplit automatically recompiles apps to extract their ad services, and we measure minimal runtime overhead. We also observe that most ad libraries just embed an HTML widget within and describe how AdSplit can be designed with this in mind to avoid any need for ads to have native code.

Several nice hardware functionalities located at the low level of operating system onmobile phones could be utilized in a better way if they are available to applicationdevelopers. With their help, developers are able to bring overall user experienceto a new level in terms of developing novel applications. For instance, one of thosehardware functionalities, SIM-card authentication is able to offer stronger andmore convenient way of authentication when compared to the traditional approach.Replacing the username-password combination with the SIM-card authentication,users are freed from memorizing passwords. However, since normally those kindsof functionalities are locked up at the low level, they are only accessible by a fewusers who have been given privileged access rights. To let the normal applicationsbe benefiting as well, they need to be made accessible at the application level. Onthe one hand, as we see the benefit it will bring to us, there is a clear intentionto open it up, however, on the other hand, there is also a limitation resultingfrom their security-critical nature that needs to be placed when accessing whichis restricting the access to trusted third parties. Our investigation is based on the Android platform. The problem that we havediscovered is the existing security mechanism in Android is not able to satisfy everyregards of requirements we mentioned above when exposing SIM-card authenticationfunctionality. Hence, our requirement on enhancing the access control modelof Android comes naturally. In order to better suit the needs, we proposed a solutionWhite lists & Domains (WITDOM) to improve its current situation in thethesis. The proposed solution is an extension to the existing access control modelin Android that allows alternative ways to specify access controls therefore complementingthe existing Android security mechanisms. We have both designedand implemented the solution and the result shows that with the service that weprovided, critical functionalities, such as APIs for the low-level hardware functionalitycan retain the same level of protection however in the meanwhile, with moreflexible protection mechanism.

In the beginning, computers are developed in need of complex computing. And it has been evolved from mainframes in enterprise and computer center to desktop at home. After the rapidly spreading of internet, computer undertakes an important role in people¡¦s life. It helps us with our work, doing computation, even links people together through E-mail and instant message software. With computers by our side, we live a much more convenient life. Google announced its latest mobile platform operating system ¡§Android¡¨ on November 5th, 2007. Android is constructed base on Linux kernel, which means it can be treated as a portable computer, with application designed for entertaining, Internet surfing, and social communication. Social communication has been proven to be a important issue. For instance, Facebook, a social network service provider online since February 4th, 2004, creates a place to let people share their messages, photos and news, has more than ten million user today. So far the mobile phone has become a very convenient way to communicate, but if users wish to share photos, music or documents to friends. This thesis is going to discover a new way to share views, photos, music with friends immediately. This paper describes the issues with data synchronization between mobile phones.

This paper proposes a device capable of acquiring an electrocardiogram (ECG, EKG) signal to be hosted by a typical Android smartphone. Bluetooth is used as the data connection. Once acquired, the signal is graphed on the display of the smartphone. A basis of physiology behind the ECG is presented. The data acquisition system and the performance of the ECG amplification and supporting circuits are analyzed. / text

We describe the design, algorithm, implementation and experiments with ClosetStylist – an Android app that helps users digitize their clothing inventory for better usage, manage outfit worn history, laundry bags, and last but not least, suggest what to wear based on occasion and weather. The app utilizes a variety of off-the-shelf services such as location and weather services, combining with our own clothes matching algorithm to recommend the most suitable outfit to users. In addition to the main features, ClosetStylist offers a friendly user interface that enables smooth navigation and keeps users engaged. The app was tested under different mock weather conditions with two sets of wardrobe, specifically a male closet of 24 items and a female closet of 86 items. The recommended outfits were displayed on the screen within three seconds of the moment the user initiated the options from the main menu. The app recommended satisfying results which we would hand-pick as our daily outfits. / text