DOCSLIB.ORG

NDK / Java Native Interface 자바 네이티브 인터페이스

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
NDK / Java Native Interface 자바 네이티브 인터페이스 NDK / Java Native Interface 자바 네이티브 인터페이스 - 1 - NDK / Java Native Interface . ACHRO4210의 디바이스 . 안드로이드에서 사용되는 대표적인 디바이스 LCD, Touch, Keypad, Wifi, Bluetooth, audio,… - 커널에서는 각 드라이버를 해당 플랫폼 드라이버로 등록 LCD Bluetooth Touch Keypad WiFi … . 그외의 일반적이지 않은 디바이스 보통의 안드로이드 기기에서 사용하지 않는 장치 - 커널에 별도의 드라이버 모듈을 적재하고, App은 JNI를 이용 장치와 통신 GPS EPD MPU RFID Blood Checker … - 2 - 2 Huins. R&D Center NDK / Java Native Interface . Java Native Interface . JNI 개요 - Java는 순수 소프트웨어 툴 - 하드웨어 의존적인 코드와 속도향상을 위해 Device를 제어할 필요가 있는경우 이용 - C와 C++로 작성 - 구글에서 제공하는 NDK(Native DK)툴을 이용 . 안드로이드 플래폼 구조 - 3 - 3 Huins. R&D Center NDK / Java Native Interface . JNI . JVM에서 돌아가는 Java 코드와 C/C++로 구현된 코드가 상호참조하 기 위해 사용하는 programming framework . Platform-dependent한 라이브러리를 사용하고자 할 때, 혹은 기존의 프로그램을 Java에서 접근가능하도록 변경하고자 할 때 쓰임 - 4 - 4 Huins. R&D Center NDK / Java Native Interface . Android NDK . A toolset that lets you embed in your apps native source code . C, C++(recently supported December 2010) and assembly(?) . It is supported on android cupcake(1.5)+ - 5 - 5 Huins. R&D Center NDK / Java Native Interface . 언제 Android NDK를 쓸 것인가? . 단지 C, C++을 더 쓰고 싶어서라면 쓰지말것.. NDK 사용의 단점을 뛰어넘는 장점이 있을때만 사용할 것 . 응용 개발의 복잡성이 증가하며, . 디버깅이 어려움 . 그리고, C, C++을 사용한다고 해서 항상 성능이 빨라지는 것도 아님 - 6 - 6 Huins. R&D Center NDK / Java Native Interface . NDK 설치 - jni 파일을 컴파일하여 so파일로 컴파일 하는 툴과 예제를 포함한 개발 킷 . NDK 다운로드 . android-ndk-r9b-linux-x86.tar.bz2 다운로드 from http://developer.android.com/tools/sdk/ndk/index.html or http://web.donga.ac.kr/jwjo or [CD]/android_tools/linux/ndk_linux_x86_x64/android-ndk-r7-linux-x86.tar.bz . NDK 복사 및 설치 # tar jxvf android-ndk-r9b-linux-x86.tar.bz2 -C /work/mydroid . NDK 패스 설정 # cd /root # vim .bashrc … … # NDK Path export PATH=/work/mydroid/android-ndk-r8b:$PATH - 7 - 7 Huins. R&D Center NDK / Java Native Interface . JNI 테스트 - JNI 가 정상 설치되었는지 테스트 . Hello JNI 디렉터리로 이동 # cd /work/mydroid/android-ndk-r9b/samples/hello-jni . 패키지에 포함된 경로 # cd /work/mydroid/android-ndk-r9b/samples/hello-jni # ls AndroidManifest.xml default.properties jni libs obj res src tests # ls ./jni Android.mk hello-jni.c # ndk-build - 8 - 8 Huins. R&D Center NDK / Java Native Interface . JNI 테스트 . IDE툴을 이용하여 HelloJNI를 연다. ndk에 있는 hello-jni프로젝트를 열어서 실제로 실행 시켜 본다. FILE NEW Other… Android Project 선택 . Project를 열때 기존에 존재하는 소스 디렉터리를 선택 Create project form existing source Browse hello-jni 디렉터리 . libhello-jni.so 파일 확인 - IDE 패키지 트리에서 컴파일한 hello-jni.c 가 정상적으로 컴파일 되었는지를 확인 - 정상적으로 컴파일 되었다면 libs/armeabi/libhello-jni.so 파일이 생성되어있어야 함 . 실행 - IDE에서 Run을 실행하여 프로그램을 실행한다. - 장치가 있으면 장치에서 실행하고, 없는 경우 생성되어있는 가상 디바이스(AVD)에 실행된다. - 9 - 9 Huins. R&D Center NDK / Java Native Interface . Hello Jni 소스 분석 . Hello-jni.java native 키워드를 붙여 선언부만 작성함. public native String stringFromJNI(); 네이티브 라이브러리에 구현 부가 있음 public class HelloJni extends Activity { @Override public void onCreate(Bundle savedInstanceState){ super.onCreate(savedInstanceState); TextView tv = new TextView(this); tv.setText( stringFromJNI() ); 네이티브 라이브러리 함수도 보통의 setContentView(tv); 자바 메소드와 같은 방식으로 사용한다. } public native String stringFromJNI(); public native String unimplementedStringFromJNI(); static { System.loadLibrary("hello-jni"); 클래스가 로딩될 때 호출됨. } hello-jni라는 이름의 네이티브 라이브러리를 로딩. ‘lib’와 ‘.so’는 생략한다. } . hello-jni.c jstring Java_com_example_hellojni_HelloJni_stringFromJNI( JNIEnv* env, jobject thiz ) { return (*env)->NewStringUTF(env, "Hello from JNI !"); } 리턴 타입 접두사 패키지 클래스 함수 공통 파라메타 - 10 - 10 Huins. R&D Center NDK / Java Native Interface . Android.mk - GNU Makefile의 일부 - Static library와 Shared library를 생성 - Static library는 Shared library를 생성하기 위해 사용 LOCAL_PATH := $(call my-dir) LOCAL_PATH 는 현재 파일의 경로를 주기 위해 사용 ‘my-dir’은 현재 디렉터리 경로를 반환 include $(CLEAR_VARS) 빌드 시스템에서 제공하는 LOCAL_PATH를 제외하고 LOCAL_MODULE := hello-jni LOCAL_XXX를 Clear함(undefine) LOCAL_SRC_FILES := hello-jni.c LOCAL_LDLIBS := -L$(SYSROOT)/usr/lib -llog include $(BUILD_SHARED_LIBRARY) 모듈의 이름의 정의. 유일하고 중간에 공백이 있어서는 안된다. Shard library를 생성 LOCAL_XXX 변수에서 제공하는 정보를 수집하고 모듈로 빌드될 C와 C++ 소스파일의 목록 목록의 소스로 부터 shared library를 빌드하는 방법을 결정 추가적인 linker flag의 목록 include $(BUILD_SHARED_LIBRARY) lib$(LOCAL_MODULES).so include $(BUILD_STATIC_LIBRARY) lib$(LOCAL_MODULE).a - 11 - 11 Huins. R&D Center NDK / Java Native Interface . Shared library의 명명 규칙 1. ‘lib’prefix<name>’.so’suffix의 형식 2. <name>이 ‘hello-jni’라면, 최종 파일은 ‘libhello-jni.so’ . 생성된 라이브러리 위치 Shared library는 프로젝트의 적절한 경로에 복사되고, 최종 ‘.apk’파일에 포함 최종 파일은 project\libs\armeabi 의 경로에 libhello-jni.so파일로 생성 - 12 - 12 Huins. R&D Center NDK / Java Native Interface . Linux 구조 - 안드로이드의 JNI는 드라이버를 처리 하거나 복잡한 메모리 연산부분에 대해서 커널을 이용하는 방법이용한다. - 13 - 13 Huins. R&D Center NDK / Java Native Interface . Linux Device Driver - 커널을 통해 디바이스를 제어하기 위해 사용되는 소프트웨어 - 커널은 주번호와 부번호를 통해 등록된 디바이스와 연결 - 리눅스의 모든 하드웨어 장치들은 파일로 관리 (/dev) . 디바이스 드라이버와 커널 - 14 - 14 Huins. R&D Center NDK / Java Native Interface . 디바이스 드라이버와 어플리케이션간의 통신 - 15 - 15 Huins. R&D Center NDK / Java Native Interface . 커널 모듈 . 모듈은 리눅스 시스템이 부팅된 후 동적으로 load, unload 할 수 있는 커널의 구성 요소 . 시스템을 재부팅 하지 않고, 일부를 교체할 수 있다 . 리눅스를 구성하는 많은 모듈들은 의존성이 있을 수 있다. 커널을 등록시킬 때에는 insmod 명령을 이용하고 내릴 때는 rmmod 명령을 이용한다. /* This program is modue example AUTH : Huins, Inc MENT : Test Only */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> MODULE_LICENSE("GPL"); MODULE_AUTHOR("Huins"); static int module_begin(void) { printk(KERN_ALERT "Hello module, Achro 4210!!\n"); return 0; } static void module_end(void) { printk(KERN_ALERT "Goodbye module, Achro 4210!!\n"); } module_init(module_begin); module_exit(module_end); - 16 - 16 Huins. R&D Center NDK / Java Native Interface . LED 드라이버 . 회로 Exynos4210 CPU - 17 - 17 Huins. R&D Center NDK / Java Native Interface . LED 드라이버 . 회로 설명 - CPU의 GPIO핀과 LED가 연결되어있음 - LED에는 VDD를 통해 전원이 공급되고 있음 - CPU의 핀이 LOW(0)가 되면 LED가 점등. 연번 순서 PIN NAME CPU/IO 1 LED 0 SPI_1.MOSI GPB7 2 LED 1 SPI_1.MISO GPB6 3 LED 2 SPI_1.NSS GPB5 4 LED 3 SPI_1.CLK GPB4 . LED Driver Souce /* LED Ioremap Control FILE : led_driver.c */ // 헤더 선언부 #define LED_MAJOR 240 // 디바이스 드라이버의 주번호 #define LED_MINOR 0 // 디바이스 드라이버의 부번호 #define LED_NAME "led_driver" // 디바이스 드라이버의 이름 #define LED_GPBCON 0x11400040 // GPBCON 레지스터의 물리주소 #define LED_GPBDAT 0x11400044 // GPBDAT 레지스터의 물리주소 int led_open(struct inode *, struct file *); int led_release(struct inode *, struct file *); ssize_t led_write(struct file *, const char *, size_t, loff_t *); - 18 - 18 Huins. R&D Center NDK / Java Native Interface . LED Driver Souce static int led_usage = 0; if(result <0) { static unsigned char *led_data; printk(KERN_WARNING"Can't get any major!\n"); static unsigned int *led_ctrl; return result; static struct file_operations led_fops = { } .open = led_open, led_data = ioremap(LED_GPBDAT, 0x01); .write = led_write, if(led_data==NULL) { .release = led_release, printk("ioremap failed!\n"); }; return -1; } int led_open(struct inode *minode, struct file *mfile) { led_ctrl = ioremap(LED_GPBCON, 0x04); if(led_usage != 0) if(led_ctrl==NULL) { return -EBUSY; printk("ioremap failed!\n"); led_usage = 1; return -1; return 0; } else { } get_ctrl_io=inl((unsigned int)led_ctrl); get_ctrl_io|=(0x11110000); int led_release(struct inode *minode, struct file *mfile) { outl(get_ctrl_io,(unsigned int)led_ctrl); led_usage = 0; } return 0; outb(0xF0, (unsigned int)led_data); } return 0; } ssize_t led_write(struct file *inode, const char *gdata, size_t length, loff_t *off_what) { void __exit led_exit(void) { const char *tmp = gdata; outb(0xF0, (unsigned int)led_data); unsigned short led_buff=0; iounmap(led_data); outb (led_buff, (unsigned int)led_data); iounmap(led_ctrl); return length; unregister_chrdev(LED_MAJOR, LED_NAME); } } int __init led_init(void) { module_init(led_init); int result; module_exit(led_exit); unsigned int get_ctrl_io=0; MODULE_LICENSE ("GPL"); result = register_chrdev(LED_MAJOR, LED_NAME, &led_fops); MODULE_AUTHOR ("Huins HSH"); - 19 - 19 Huins. R&D Center Internal Device Driver . Led Driver . File Operation struct static struct file_operations led_fops = { .open = led_open, .write = led_write, .release = led_release, } ; . led_open() int led_open(struct inode *minode, struct file *mfile) { if(led_usage != 0) return -EBUSY; led_usage = 1; return 0; } . led_release() int led_release(struct inode *minode, struct file *mfile) { led_usage = 0; return 0; } - 20 - 20 Huins. R&D Center Internal Device Driver . led_write() ssize_t led_write(struct file *inode, const char *gdata, size_t length, loff_t *off_what) { const char *tmp = gdata; unsigned short led_buff=0; if (copy_from_user(&led_buff, tmp, length)) return -EFAULT; outb (led_buff, (unsigned int)led_data); return length; } . led_release() void __exit led_exit(void) { outb(0xF0, (unsigned int)led_data); iounmap(led_data); iounmap(led_ctrl); unregister_chrdev(LED_MAJOR, LED_NAME); printk("Removed LED module\n"); } - 21 - 21 Huins. R&D Center Internal Device Driver . led_init() int __init led_init(void) { int result; unsigned int get_ctrl_io=0; result = register_chrdev(LED_MAJOR, LED_NAME, &led_fops); if(result <0) { printk(KERN_WARNING"Can't get any major!\n"); return result; } led_data = ioremap(LED_GPBDAT, 0x01); if(led_data==NULL) [ // 오류 처리 } led_ctrl = ioremap(LED_GPBCON, 0x04); if(led_ctrl==NULL) { // 오류 처리 } else { get_ctrl_io=inl((unsigned int)led_ctrl); get_ctrl_io|=(0x11110000); outl(get_ctrl_io,(unsigned int)led_ctrl); } printk("init module, /dev/led_driver major : %d\n", LED_MAJOR); outb(0xF0, (unsigned int)led_data); return 0; } - 22 - 22 Huins. R&D Center Internal Device Driver . Test Application /* … (생략) … int main(int argc, char **argv) { unsigned char val[] = {0x70, 0xB0, 0xD0, 0xE0, 0x00, 0xF0}; if(argc != 2) { // 실행 어규먼트를 받았는지 체크 및 오류처리 } led_fd = open("/dev/led_device", O_RDWR); // 디바이스를 오픈. if (led_fd<0) { // 만약 디바이스가 정상적으로 오픈되지 않으면 오류 처리후 종료 } get_number=atoi(argv[1]); // 받은 인자를 숫자로 바꾼다. if(get_number>0||get_number<9) // 숫자가 0~9 까지에 포함되는지 확인. write(led_fd,&val[get_number],sizeof(unsigned char)); else printf("Invalid Value : 0 thru 9"); // 포함되지 않으면, 메시지를 출력. close(led_fd); // 장치를 닫아줌. return 0; // 프로그램을 종료. } - 23 - 23 Huins. R&D Center NDK / Java Native Interface . LED Driver 컴파일 스크립트 (Makefile) # vim Makefile # This is simple Makefile obj-m := led_driver.o # led_driver.c를 컴파일하여 led_driver.ko파일을 만든다.
Load more

Recommended publications
  • Sigma Designs Android Presentation
    Android on Sigma Pocket STB Development Kits for MIPS-Android-Sigma Venkat R. Uppuluri Director of Marketing, Advanced Technology & Partners AUGUST - 09 C O N F I D E N T I A L Sigma Designs Media Processor and Connected Home Solutions for Consumer Electronics Products Industry-leading media processors for Digital Home . IP-STBs . BluRay Players . Digital Media Adapters & Portable Media Players VXP® video processing solutions Connected Home Technologies CoAir® - Wired & Wireless Home Networking Z-Wave® - Home Area Automation for Control, Energy & Security AUGUST - 09 C O N F I D E N T I A L Sigma Designs in Digital Media Adapters • Sigma Designs is the most trusted name in networked Media Players Market Connected HDTV or DMA driving standard HDTV Netflix, YouTube, Premium internet content via WebKit, Qt Browser, PC or Wi-Fi Router or Ethernet port Adobe 3.1 Flash Lite, and more porting kits Windows XP or from Sigma Designs Vista PC or Router Personal content: photos, music, video DLNA server (PVR, network media server, etc.) AUGUST - 09 C O N F I D E N T I A L Sigma Designs Software Architecture A pre-requisite to join the program is for you to already intimately know our software platform AUGUST - 09 C O N F I D E N T I A L Android on SMP86xx • Sigma sample apps • DCCHD • MRUA AV • No DirectFB support planned AUGUST - 09 C O N F I D E N T I A L Android on Sigma Schedule • Middle of September – To limited customers and partners • Based on Android Cupcake • Precompiled Linux kernel 2.6.29 • Linux kernel 2.6.29 source • Precompiled mrua with sample apps running from java launcher • Playback of local files in 1080p AUGUST - 09 C O N F I D E N T I A L mipsandroid.org MIPS-Android-Sigma Subproject has been created for Sigma.
    [Show full text]
  • Software Development Methodologies on Android Application Using Example
    View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by VUS Repository POLYTECHNIC OF ŠIBENIK DEPARTMENT OF MANAGEMENT SPECIALIST STUDY OF MANAGEMENT Ivan Bumbak SOFTWARE DEVELOPMENT METHODOLOGIES ON ANDROID APPLICATION USING EXAMPLE Graduate thesis Šibenik, 2018. POLYTECHNIC OF ŠIBENIK DEPARTMENT OF MANAGEMENT SPECIALIST STUDY OF MANAGEMENT SOFTWARE DEVELOPMENT METHODOLOGIES ON ANDROID APPLICATION USING EXAMPLE Graduate thesis Course: Software engineering Mentor: PhD Frane Urem, college professor Student: Ivan Bumbak Student ID number: 0023096262 Šibenik, September 2018. TEMELJNA DOKUMENTACIJSKA KARTICA Veleučilište u Šibeniku Diplomski rad Odjel Menadžmenta Diplomski specijalistički stručni studij Menadžment Razvojne metode programa na Android platformi koristeći primjer Ivan Bumbak [email protected] Postoji mnogo razvojnih metoda programskih rješenja koje se mogu koristiti za razvoj istih na bilo kojoj platformi. Koja metoda će se koristiti ovisi o zahtjevnosti samog projekta, koliko ljudi radi na projektu, te u kojem vremenskom roku projekt mora biti isporučen. U svrhu ovog diplomskog rada razvijena je Android aplikacija putem tradicionalne metode, iako su danas sve više i više popularne takozvane agile metode. Agile, ili agilan, znači biti brz i sposoban reagirati na vrijeme te prilagoditi se svim promjenama u bilo kojem trenutku razvoja projekta. U radu su objašnjenje najpopularnije agile metode te su prikazane prednosti korištenja agile metoda u odnosu na tradicionalnu metodu. (37 stranica
    [Show full text]
  • Securing Android Devices
    Securing Android Devices Sun City Computer Club Seminar Series May 2021 Revision 1 To view or download a MP4 file of this seminar With audio • Audio Recording of this seminar • Use the link above to access MP4 audio recording Where are Android Devices? • Smart Phones • Smart Tablets • Smart TVs • E-Book Readers • Game consoles • Music players • Home phone machines • Video streamers – Fire, Chromecast, Why Android devices? • Cutting edge technology – Google • User Friendly • User modifications Android Software Development Kit (SDK) Open Source • Huge volume of applications • Google, Samsung, LG, Sony, Huawei, Motorola, Acer, Xiaomi, … • 2003 • CUSTOMIZABLE My Choices • Convenience vs Privacy • Helpful <-> Harmful • Smart devices know more about us than we do Android “flavors” flavours • Android versions and their names • Android 1.5: Android Cupcake • Android 1.6: Android Donut • Android 2.0: Android Eclair • Android 2.2: Android Froyo • Android 2.3: Android Gingerbread • Android 3.0: Android Honeycomb • Android 4.0: Android Ice Cream Sandwich • Android 4.1 to 4.3.1: Android Jelly Bean • Android 4.4 to 4.4.4: Android KitKat • Android 5.0 to 5.1.1: Android Lollipop • Android 6.0 to 6.0.1: Android Marshmallow • Android 7.0 to 7.1: Android Nougat • Android 8.0 to Android 8.1: Android Oreo • Android 9.0: Android Pie • Android 10 Many potential combinations • Each manufacturer “tunes” the Android release to suit #1 Keep up with updates Android Operating System Android firmware (Very vendor specific) Android Applications (Apps) Android settings
    [Show full text]
  • Gabriel Rene Moreno” Unidad De Postgrado De La Facultad De Ingeniería En Ciencias De Las Computación Y Telecomunicaciones “Uagrm School of Engineering”
    UNIVERSIDAD AUTÓNOMA “GABRIEL RENE MORENO” UNIDAD DE POSTGRADO DE LA FACULTAD DE INGENIERÍA EN CIENCIAS DE LAS COMPUTACIÓN Y TELECOMUNICACIONES “UAGRM SCHOOL OF ENGINEERING” “METODOLOGÍA DE TRABAJO PARA EVALUACIÓN DE SEGURIDAD INFORMÁTICA EN APLICACIONES MÓVILES ANDROID PARA LA EMPRESA YANAPTI S.R.L.” TRABAJO EN OPCIÓN AL GRADO DE MÁSTER EN AUDITORÍA Y SEGURIDAD INFORMÁTICA AUTORA: Ing. Linette Evelyn Zema Cadima DIRECTOR DE TRABAJO FINAL DE GRADO: M.Sc. Ing. Guido Rosales Uriona SANTA CRUZ - BOLIVIA OCTUBRE – 2019 I Cesión de derechos Declaro bajo juramento que el trabajo aquí descrito, titulado “Metodología de Trabajo para Evaluación de Seguridad Informática en Aplicaciones Móviles Android para la Empresa Yanapti S.R.L.” es de propia autoría; que no ha sido previamente presentada para ningún grado de calificación profesional; y, que se ha consultado las referencias bibliográficas que se incluyen en este documento. A través de la presente declaro que cedo mi derecho de propiedad Intelectual correspondiente a este trabajo, a la UAGRM Facultad de Ingeniería en Ciencias de la Computación y Telecomunicaciones, según lo establecido por la Ley de Propiedad Intelectual, por su Reglamento y por la normatividad institucional vigente. ________________________________ Ing. Linette Evelyn Zema Cadima II AGRADECIMIENTO A Dios, por brindarme sus bendiciones, por darme fuerzas para alcanzar mis metas, y por estar siempre conmigo. A mi familia, por apoyarme en todo momento, y motivarme para conseguir mis metas. A mi tutor, el Ing. Guido Rosales, por compartir su experiencia y conocimiento en el desarrollo de este trabajo. A la UAGRM y a la Unidad de Postgrado de la FICCT, por contribuir con mi formación profesional a través de esta Maestría.
    [Show full text]
  • Biometrics and Security in Smartphones Steven
    Biometrics and Security in Smartphones Steven Bullard Efrain Gonzalez Carter Jamison Saint Leo University Saint Leo, FL, USA about security authentication, back-ups, passwords, etc. But we do not live in that Steven: perfect world. Things we physically own or Abstract: ideas we write down, including intellectual property, need protecting. In all honesty, the point of the fingerprint In this paper we look at the reader is to save time, and to force people to significance of biometrics, specifically implement some form of security on their fingerprint readers which have been devices, which often store very sensitive implemented into smartphones, primarily data. It is a cooler looking alternative to the iPhone 5S. The security of the inputting long strings of complex passwords technology is presented and analyzed while every time you want to unlock your device the security breaches and hacks are or authorize a transaction in the App Store. demonstrated in detail. We look at secure Humans are lazy and we want speed over options in Android vs. iOS. And we also most everything. Touch ID allows just that look at the future of biometrics and soon to while also supporting just as much, if not be wearable technology. We then propose more security than a passcode. the idea of two factor authentication and a fingerprint database. 2 Apple History Keywords: iPhone, Security, Touch ID, iOS, Android Officially founded in 1976 [1], 1 Intro garage-started Apple Computer went from being the laughingstock of the neighborhood in Palo Alto, California to a multinational Technology is ever changing. In a corporation with an incredible reputation for world like ours we are constantly seeking constantly revolutionizing different the next big discovery, invention, what have industries.
    [Show full text]
  • Android E a Influência Do Sistema Operacional Linux
    Android e a influência do Sistema Operacional Linux Gleicy Kellen dos Santos Faustino Hallana Keury Nunes de Sousa Calazans Welton Dias de Lima Resumo: O sistema operacional é utilizado para realização de alguma atividade exercida pelo processador. Esse conjunto de atividades é responsável pelo funcionamento adequado do computador, sem o sistema operacional, o computador não ganha vida. Através da arquitetura baseada no sistema operacional Linux foi possível à criação do Android, porém, poucos conhecem sua história, os benefícios vindos pelo seu desenvolvimento e muito menos a sua influência no mercado mobile. Em apenas sete anos, a plataforma Android encontra-se em primeiro lugar como o sistema operacional mais utilizado no mundo, possuindo cerca de dez versões e mais de um bilhão de usuários. Palavras Chave: Sistema operacional; Android. Abstract: The operating system is used to perform some activity performed by the processor. This set of activities is responsible for the proper functioning of the computer, without the operating system, the computer does not come to life. Through the architecture based on the Linux operating system, it was possible to create Android, but few know its history, the benefits of its development and even less its influence in the mobile market. In just seven years, the Android platform ranks first as the most widely used operating system in the world, with about ten versions and more than one billion users. Keywords: Operational system; Android 1. Introdução Com do avanço da tecnologia veio inclusa a evolução dos celulares, que hoje, chamamos de smartphones (celulares inteligentes). Atualmente, não conseguimos nos desgrudar da tela do celular, seja enviando mensagens, assistindo vídeos ou fazendo uma famosa selfie.
    [Show full text]
  • Save Game Hay Day Android
    Save game hay day android Continue Gadget company Cisco announces its own business tablet built on Android, Android 2.2 is launching on Nexus One owners, and Verizon is rumored to once again start offering iPhones. In the second part of our Android History series, we'll look at the impact of the T-Mobile G1 launch, the nuts and bolts of the open source Android model and early user interface designs, as well as the partnership with Verizon that gave us Droid. And we'll talk to the leading executive who oversaw the arrival of the G1. Read on to find out all about the first days of Android. The T-Mobile G1 (or HTC Dream outside the United States) has changed everything when it comes to mobile devices. Like the Palm Treo, or the original iPhone, without the G1, as we do everything we do on our smartphones will be different - and probably not as good - without it. Not because the G1 had great hardware, or amazing specs or things like an advanced camera or an amazing screen. The equipment was chunky, mostly due to the slip and rotated sidekick-esque keyboard, and the shape included a chin at the bottom that you either loved or hated. The physical buttons for navigating Android - menus, home and back - as well as answering calls and interactive trackball were hard to get used to for many, but worked well and were a necessary part of navigating through Android Cupcake. The keyboard - in 2008 most good devices were still one - was great for typing and lovely chicken keys, as well as a dedicated number and function keys.
    [Show full text]
  • Android Development Based on Linux Rohan Veer1, Rushikesh Patil2, Abhishek Mhatre3, Prof
    Vol-4 Issue-5 2018 IJARIIE-ISSN(O)-2395-4396 Android Development based on Linux Rohan Veer1, Rushikesh Patil2, Abhishek Mhatre3, Prof. Shobhana Gaikwad4 1 Student, Computer Technology, Bharati Vidyapeeth Institute of Technology, Maharashtra, India 2 Student, Computer Technology, Bharati Vidyapeeth Institute of Technology, Maharashtra, India 3 Student, Computer Technology, Bharati Vidyapeeth Institute of Technology, Maharashtra, India 4 Professor, Computer Technology, Bharati Vidyapeeth Institute of Technology, Maharashtra, India ABSTRACT Android software development is used to produce apps for mobile devices that includes an OS (Operating System) and various applications. It can be used to make video applications, music applications, games, editing software etc. The android operating system was showcased by Google after which android development started. The Google initially released the android operating system on 23th September 2008.Google hired some developers and started building applications which started app development and fast production of android applications. The applications and operating system for android are written in Java as the android is based on Linux so it was difficult at the start to write programs for android. But as the technical skills were improving to debug an application so it became easier for developers to solve the issues and debug the errors in the applications. The first android operating system was able to perform some basic task like messaging, calling, downloading some specific applications etc. After that Google released various versions of android operating system with newly added features and design. With every new version of android speed of device and user experience were getting much better in day to day life.
    [Show full text]
  • Android Versions in Order
    Android Versions In Order Mohamed remains filmiest after Husein idolatrized whereby or urbanising any indulgences. Barret mums his hammals curves saprophytically or bellicosely after Ware debilitates and overweights henceforward, fuzzier and Elohistic. Satyrical Brinkley plumb inquietly. Link ringcomapp will automatically begin downloading the correct version for. Cupcake was the obvious major overhaul of the Android OS. Incompatible with beta versions of OSes. Which phones will get Android 10 update? It also makes your Realm file slightly larger, to lest the index. Adjustandroidsdk This type the Android SDK of GitHub. When our, native code should render appropriate public Java API methods. Remember our switch if your live stream key in production. This tells GSON to dental this database during serialization. These cookies do not quarrel any personal information. Cordova's CLI tools require cold environment variables to be set in police to. Privacy is a tall piece for Google given especially the company makes money and. Similar note the displays the Galaxy S20 is myself being used as a clip for Samsung's improved camera tech. Major version in order will be careful not go on to combine multiple user switches to black and audio option depending on their devices will use. Set in android versions for managing telephone videos, with multiple cameras and restore for a layer window, and voicemails across mobile app is used apps. This grass had very helpful to keep through the dependency versions together, as previously required. Android and choose to drop using dessert names to century to the version of its mobile operating systems. We use in order to insert your version in which you when the versions of.
    [Show full text]
  • Android Architecture and Versions
    3rd International Conference on Computing: Communication, Networks and Security (IC3NS-2018) ISSN: 2454-4248 Volume: 4 Issue: 3 57 – 60 _______________________________________________________________________________________________ Android Architecture and Versions Dimpal Nehra College of Engineering and Technology, Mody University, Rajasthan Email: [email protected] Abstract: Android operating system is the most commonly used operating system for mobile devices. It is widely used in mobile phones, tablets. It is an open source and codes are written in java. In android system we can apply 2D and 3D graphics at the same time in an application. This paper is all about the introduction of android, discussion about its birth and later on its architecture and architecture layers that include Linux Kernel layer, Libraries and Android runtime, Application Framework layer, Application layer, Android virtual device, versions of android and discussion about their specific codename. __________________________________________________*****_________________________________________________ I. Introduction virtual machine, java libraries, application framework The users of devices like mobile phones, tablets etc. are and applications that are build-in and also custom increasing rapidly, so this android operating system applications become very common and a very important part of life. This is an open source and the codes are written in java, II. Architecture one can also change its android features by just turn on Android architecture has four layers, Linux Kernel, the developer option. The android operating system is Libraries and Runtime layer, Application framework, also linked with the hardware features like camera, wi- and application layer. The Linux Kernel provides basic fi, Bluetooth, GPS etc. just by giving some permissions services like memory management, process Android Inc.
    [Show full text]
  • Bab Ii Landasan Teori
    BAB II LANDASAN TEORI 2.1. Konsep Dasar Program Menurut Kadir (2012:2) mengemukakan bahwa ”program adalah kumpulan instruksi yang digunakan untuk mengatur komputer agar melakukan suatu tindakan tertentu”. Tanpa program, komputer sesungguhnya tidak dapat berbuat apa-apa. Itulah sebabnya sering dikatakan bahwa komputer mencangkup tiga aspek penting berupa perangkat keras (hardware), perangkat lunak (sofware) yang dalam hal ini berupa program, dan perangkat akal (brainware) atau orang yang berperan terhadap operasi komputer maupun pengembang perangkat lunak. Dengan kata lain, program merupakan salah satu bagian penting pada komputer, yang mengatur komputer agar melakukan tindakan sesuai dengan yang dikehendaki oleh pembuatnya. Suatu program ditulis dengan mengikuti kaidah bahasa pemerograman tertentu. Bahasa pemrograman dapat dianalogikan dengan bahasa yang digunakan manusia (bahasa manusia). Sebagaimana diketahui, ada bermacam-macam bahasa manusia, seperti bahasa inggris, bahasa indonesia, dan bahasa batak. Kumpulan instruksi dalam bahasa manusia yang berupa sejumlah kalimat dapat anda analogikan dengan suatu program. Manusia dapat mengerjakan suatu instruksi berdasarkan kalimat-kalimat dan komputer bisa menjalankan suatu instruksi menurut program. 4 5 Dalam konteks pemerograman, terdapat sejumlah bahasa pemerograman seperti Pascal, C, dan BASIC. Secara garis besar, bahasa-bahasa pemerograman dapat dikelompokan menjadi: 1. Bahasa tingkat tinggi (high-level language), dan 2. Bahasa tingkat rendah (low-level language). Menurut Kadir (2012:3) mengemukakan bahwa “bahasa tingkat tinggi adalah bahasa pemerograman yang berorientasi kepada bahasa manusia”. Program dibuat menggunakan bahasa pemerograman yang mudah dipahami manusia. Biasanya menggunakan kata-kata bahasa inggris, misalnya IF untuk menyatakan “jika” dan AND untuk menyatakan “dan” . termasuk dalam kelompok bahasa ini yaitu Java, C++, Pascal, dan BASIC. Menurut Kadir (2012:4) mengemukakan bahwa “bahasa tingkat rendah adalah bahasa pemerograman yang berorientasi kepada mesin”.
    [Show full text]
  • Revolutionary Mobile Operating System: Android
    International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395 -0056 Volume: 03 Issue: 07 | July-2016 www.irjet.net p-ISSN: 2395-0072 Revolutionary mobile operating system: Android Mrs. Kavita Nikhil Ahire1 Lecturer in Information Technology Dept. VPMs Polytechnic College, Thane ---------------------------------------------------------------------***--------------------------------------------------------------------- Abstract – Now days, Android operating system is one of the best of operating system in the world which is basically 2. Android Architecture for mobiles. Android operating system is based on Linux kernel and is developed by Google which is primarily Android operating system is a stack of software designed for smart phones and tablets. Smart phones components. Main components of Android operating devices such as iPhone, blackberry and those that support android operating system are progressively making an system architecture are: impact on society because of their support for voice, text exchange and therefore which are capable of handling 1. Linux kernel embedded software applications. 2. Native libraries layer 3. Android runtime Key Words: Android, tablets, iphone, blackberry, 4. Application framework embedded, version. 5. Application layer 1. INTRODUCTION In recent years, emergence of smart phones has change the definition of mobile phones. Phone is no longer just a communication tool, but also an essential part of the people’s communications and daily life. Now the android system in the electronic market is becoming more and more popular, especially in the smart phones market. Because of the open source, some of the development tools are free so there are plenty of the applications are generated. In addition it provides a very convenient hardware platform for developers so that they can spend less effort to realize their ideas.
    [Show full text]