Android OS & SDK - Getting Started
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Android OS & SDK - Getting Started

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If you want to start a good career in Android Development, this presentation gives you a basic introduction about Android, and how you can develop your very first Android Application.

If you want to start a good career in Android Development, this presentation gives you a basic introduction about Android, and how you can develop your very first Android Application.

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Android OS & SDK - Getting Started Android OS & SDK - Getting Started Presentation Transcript

  • Operating System & Software Development Kit
  • Overview • Introduction to Android • Architecture of Android • Application Building Blocks • Developing Android App • Career Opportunities
  • Introduction
  • Introduction to Android • Open Source Software Platform for Mobile Application Development • An Open Handset Alliance Project, acquired by Google, Inc. in 2005 • A Complete Stack – Operating System + Middleware + Applications • Powered by Linux Operating System • Developed using C/C++ , provide development using Java
  • Android Powered Devices • Smart Phones • Tablets • Washing Machine • Coffeemaker (“Appresso”) • Watch • Android Powered Microwave (MAID) • Camera (Coolpix S800c) • Gaming Console • E-Bike (concept by Ford Motor Co.) • Android Powered Headrest • Ninja Robot (boxing robot) • Android Powered Refrigerator • Smart TV & Pocket TV • Chevrolet Volt integrated with Android
  • Architecture
  • Architecture of Android Applications Application Framework Libraries Android Runtime Linux Kernel Android Runtime Libraries Linux Kernel • Dalvik Virtual machine Application Framework Applications C/C++ Libraries • Work asfile (Hardware Abstraction Layer) • .dex HAL • API Interface application Built in and User Interface through Java • Device Drivers Efficient • Compact and • Activity manager.apk files Can install using • Limited memory & Power Handling User Interface • memory management • Content ->Phone-> .jar ->WeChat, Web Browser, Providers Example: .class Dialer, .dex • .java • 2D/3DAndroid or others Graphics Process Management Hello • Location Manager etc • Core LibrariesBrowser Engine, SQLite Media Acces, Networking • Java Standard Edition
  • Application Building Blocks
  • Application Building Blocks • Activity • Intents • Service • Content Providers
  • Activities • Corresponds to one UI Screen • But they can be – faceless, floating window, return a value
  • Intents • Think intent as an object or description what you want DONE! • Example- view, call, play etc. • System matches intent with activity that can best provide the service • Activities and IntentRecievers describe what intent can service Activity 1 Intent (says : I want to do this) Activity 2
  • Services • Components that run in a background • Music player, download etc.
  • Content Providers App 2 App 1 • Sharing of data across applications • Address book, photo gallery • Provide uniform API for: Content Provider (eg. address book) • Query • Delete, update & insert App 3 App 4
  • Developing Android App
  • Android Software Development Kit (SDK) • Java SDK (at least Java SDK 5) • Android SDK (http://developer.android.com/sdk/index.html)
  • Android SDK
  • Android Software Development Kit (SDK) • Install the Java and set CLASSPATH and PATH • Unzip the downloaded Android SDK, and run Eclipse (run as admin)
  • Android Application Life Cycle onCreate() onStart() Starting onRestart() onStart() onResume() Running onResume() onSaveInstanceState() onPause() Paused Stopped onSaveInstanceState() onStop() onDestroy() Destroyed onDestroy()
  • What’s inside an App ? Default Activity Libraries Other Default Default Activities Activity Activity Service Content Android Manifest Drawable Layouts Values Assets
  • Android SDK Manager Using this tool, we can download the required APIs & Libraries, for application.
  • Let’s start developing • • • • Start Eclipse (ADT) File -> new -> project Select Android Application Project Click next
  • • Enter Application Name • HelloAndroid • Enter Project Name • HelloAndroid • Enter Package Name • com.example.helloandroid • Minimum Required SDK • API 10 • Target SDK : API 10 • Compile With: API 10 • Theme : none
  • Let’s start developing • Choose all other options as default. • Click next -> next -> next -> finish….. • Now we are ready to Code and Develop
  • Let’s start developing • MainActivity.java : for back-end programming • Activity_main.xml : for designing layout (UI) • Double Click the activity_main.xml • Eclipse will show its • Graphical layout : for drag-n-drop design • Activity_main.xml : for code based design
  • Let’s start developing • In this application, we want to bind an event to that button • Whenever user click (or touch) that button, the text box must display “Hello Android” • We have designed our UI, and now its time for code in java.
  • Let’s start developing package com.example.helloandroid; import android.os.Bundle; import android.app.Activity; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText;
  • public class MainActivity extends Activity implements OnClickListener { private EditText txt; private Button btn; protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); txt = (EditText) findViewById(R.id.editText1); btn = (Button) findViewById(R.id.button1); btn.setOnClickListener(this); } public void onClick(View v) { txt.setText("Hello Android"); } }
  • Running the Application • We need to set an emulator to test on PC. • In eclipse, click Android Virtual device Manager icon. • It will popup a dialog box, that you can use to create your emulator. • In that dialog box, click new button to add an emulator.
  • Wowww!! We have done it! Now its ready to launch Press Ctrl + F11 to Run
  • Congratulations! You create your very first App! Now, its time to publish it to the world
  • Publishing Android App on Google Play Store • https://play.google.com/apps/publish/signup/ • $25 (Rs. 1600 – 1700) one time fee, pay via Google Wallet
  • Upload APK file • Find .apk of your project in bin folder of your workspace • Upload it using Screen Instructions • Manage Pricing & Distribution • Manage Store Listing • Available for end-user, anywhere in the world
  • Career Opportunities
  • Career in Android Development • Salary • Highest Salary Increases – 9% from 2012-2013 • 2012 : $85,000 - $1,22,500 , 2013 : $92,750 $1,33,500 (networkworld.com survey) • Future Scope & Growth • The more devices, the more software required, the more developer required • Get experience in Java & programming, help you to switch if you needed
  • Thanks! - Hemant Kumar Chapoliya http://hemantchhapoliya.co.in