• International Journal of Contents
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• 제8권4호
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• pp.42-49
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• 2012

Recently the unprecedented progress of Android platform and Google Play has brought more opportunities for individual mobile game developers. When playing an Android 3D game, users can accidentally hit HOME Key or BACK Key or receive an incoming message. Subsequently, another screen will appear on top and make the game application lose focus, or the operating system pause that game. These interruption events may also lead to the loss of game information or the game runs out of user control if that game cannot catch interruption events itself and resume at the exact time. As same as other mobile platforms, Android platform also provides Activity Lifecycle methods to help the game application control interruption problems. However, these methods are not adequate to solve all the interruption events. By implementing ANDCube game, we examine most of the possible interruption cases and propose some solutions to help Android game developers avoid some common interruption cases. Concurrently, we show the ways how a game application can catch all unavoidable interruption events and effectively resume from interruption to obtain a high quality game.

• 한국콘텐츠학회논문지
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• 제13권11호
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• pp.533-540
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• 2013

안드로이드 플랫폼은 현재 단일 사용자 위주의 보호만을 지원하기 때문에 다중 사용자를 위한 보안 방법이 필요하다. 특히, 개인정보 및 금융정보가 담긴 어플리케이션과 같은 특정 앱 뿐만 아니라 콘텐츠 접근을 위한 권한 관리가 필요하다. 따라서 본 논문은 안드로이드 플랫폼 기반 디바이스를 대상으로 통합된 사용자 인증 매니저 모델을 제안한다. 이를 통해 어플리케이션의 실행, 설치, 삭제를 세분화하여 관리할 수 있는 인증 매니저 모델을 제시한다.

• International Journal of Internet, Broadcasting and Communication
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• 제8권4호
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• pp.26-38
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• 2016

Recently, mobile traffic has increased tremendously due to the deployment of smart devices such as smartphones and smart tablets. Android is the world's most powerful mobile platform in smartphone. The Android operating system provide seamless access to many applications and access to the Internet. It would involve network packet sharing communicated over the network. Network packet contains a lot of useful information about network activity that can be used as a description of the general network behaviours. To study what is the behaviours of the network packet, an effective tools such as network packet analyzers software used by network administrators to capture and analyze the network information. In this research, more understanding about network information in live network packet captured from Android smartphone is the target and identify the best network analyzer software.

• ETRI Journal
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• 제35권2호
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• pp.259-269
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• 2013

Android has become the most popular platform for mobile devices. However, Android still has critical performance issues, such as "application not responding" errors and hiccups resulting from garbage collection. Many phone vendors have tried to resolve the problems by characterizing and improving the performance. However, there are few insightful performance analysis tools for the Android-based systems. This paper presents AndroScope, which is a performance analysis tool for both the Android platform (Dalvik virtual machine, core libraries, Android libraries, and even Linux kernels) and its applications. To the best of our knowledge, this is the first tool to collect and analyze performance data from all the software layers of the Android-based systems. AndroScope offers a trace mechanism to collect such deep and wide performance data as hardware performance counters, time, and memory usage. In addition, the tool includes TraceBridge, which is a middleware for the fast handling of mass logs. Moreover, AndroScope offers an integrated graphical user interface with the Android software development kit to display a great volume of the detailed performance data.

• International Journal of Computer Science & Network Security
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• 제21권8호
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• pp.182-186
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• 2021

The market for smart phones has been booming in the past few years. There are now over 400,000 applications on the Android market. Over 10 billion Android applications have been downloaded from the Android market. Due to the Android popularity, there are now a large number of malicious vendors targeting the platform. Many honest end users are being successfully hacked on a regular basis. In this work, a cloud based reputation security model has been proposed as a solution which greatly mitigates the malicious attacks targeting the Android market. Our security solution takes advantage of the fact that each application in the android platform is assigned a unique user id (UID). Our solution stores the reputation of Android applications in an anti-malware providers' cloud (AM Cloud). The experimental results witness that the proposed model could well identify the reputation index of a given application and hence its potential of being risky or not.

• 한국인터넷방송통신학회논문지
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• 제10권4호
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• pp.7-15
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• 2010

최근 모바일 플랫폼과 홈 네트워크 시스템과의 융합이 널리 보급되어 보편화되고 있다. 또한 모바일 기술의 발달로 손안의 작은 PC라고 불리는 스마트폰이 보급이 되면서 기존 핸드폰에서의 활용을 넘어 스마트폰에 최적화된 홈 네트워크 응용 개발이 요구되고 있다. 구글에서 개발한 안드로이드 모바일 플랫폼은 운영체제, 미들웨어 및 주요 응용프로그램을 포함한 오픈소스로 다양한 응용을 개발 할 수 있고, 모바일 기기뿐만 아니라 셋톱박스와 가전제품 등에도 탑재가 가능하다. 본 논문에서는 안드로이드 플랫폼의 스마트폰 상에서 주택 방안의 상태(온도, 습도, 실시간 영상 등)에 관한 정보의 실시간 모니터링과 댁내의 가전기기 등을 제어하는 홈 네트워크 서비스를 설계 구현한다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제15권6호
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• pp.2188-2203
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• 2021

With the rapid development of mobile Internet, smart phones have been widely popularized, among which Android platform dominates. Due to it is open source, malware on the Android platform is rampant. In order to improve the efficiency of malware detection, this paper proposes deep learning Android malicious detection system based on behavior features. First of all, the detection system adopts the static analysis method to extract different types of behavior features from Android applications, and extract sensitive behavior features through Term frequency-inverse Document Frequency algorithm for each extracted behavior feature to construct detection features through unified abstract expression. Secondly, Long Short-Term Memory neural network model is established to select and learn from the extracted attributes and the learned attributes are used to detect Android malicious applications, Analysis and further optimization of the application behavior parameters, so as to build a deep learning Android malicious detection method based on feature analysis. We use different types of features to evaluate our method and compare it with various machine learning-based methods. Study shows that it outperforms most existing machine learning based approaches and detects 95.31% of the malware.

• 대한임베디드공학회논문지
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• 제9권4호
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• pp.237-243
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• 2014

In this paper we present an real-time obstacle avoidance technique of autonomous mobile robot with steering system and implementation of user interface for mobile devices with Android platform. The direction of autonomous robot is determined by virtual force field concept, which is based on the distance information acquired from 5 ultrasonic sensors. It is converted to virtual repulsive force around the autonomous robot which is inversely proportional to the distance. The steering system with PD(proportional and derivative) controller moves the mobile robot to the determined target direction. We also use PSD(position sensitive detector) sensors to supplement ultrasonic sensors around dead angle area. The mobile robot communicates with Android mobile device and PC via Ethernet. The video information from CMOS camera mounted on the mobile robot is transmitted to Android mobile device and PC. And the user can control the mobile robot manually by transmitting commands on the user interface to it via Ethernet.

• 대한임베디드공학회논문지
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• 제6권3호
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• pp.190-200
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• 2011

Android platform provides a content provider and a cursor mechanism to access the internal SQLite engine. Content providers not only store and retrieve data but also make it accessible to applications. Applications can only share data through content provider, since there's no common storage area that Android packages can access. Cursor is an interface that provides random read-write access to the result set returned by a database query. However, this cursor possesses two major limitations. First, a cursor does not support a join clause among cursors, since the cursor can only access a single table in the content provider. Second, the cursor is not capable of creating user-customized field in the predefined content providers. In this paper, we propose the unified cursor architecture that merges several cursors into a single virtual cursor. Cursor translation look-aside buffer (TLB), column windowing mechanism and virtual data management are the three major techniques we have adopted to implement our structure. And we also propose a delayed synchronization method between an application and a proposed unified cursor. An application can create a user-customized field and sort multiple tables using a unified cursor on Android platform.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 추계학술대회
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• pp.411-413
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• 2012

구글의 모바일 앱 마켓인 구글 플레이에 신규 등록되는 안드로이드 앱의 증가 추세를 보면 안드로이드 플랫폼의 급속한 확산을 실감할 수 있다. 이러한 안드로이드 대중화의 원인 중 하나는 지속적인 플랫폼 업그레이드에 있다. 안드로이드 플랫폼 4.0 이후 버전에 추가된 기능들 중 하나는 스마트 기기들간 별도의 중간 연결매체 없이 통신할 수 있는 WiFi-Direct의 지원이다. 본 논문은 WiFi-Direct를 기반으로 한 소규모 즉석 회의를 지원하는 앱을 위한 설계 및 구현 기법을 제안한다. 제안된 즉석 회의 앱은 인터넷 접속이 용이하지 않은 상황에서 이용 가능하고, 회의 자료 공유 기능, 자료 노트 기능, 실시간 원격화면 제어 기능, 회의 참여자 그룹 지정 기능 등을 제공한다. 개발 결과는 안드로이드 플랫폼의 WiFi-Direct API들이 소규모 즉석 회의 응용 도메인에 효과적으로 적용될 수 있음을 증명한다.