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BVP-Gtug First Meet Up - Getting Started With Android .

BVP-Gtug First Meet Up - Getting Started With Android .

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    Android Android Presentation Transcript

    • Between love and madness lies obsession
    • Platform PresentationYour First Android Experience
      Shrey Malhotra
      27 / April / 2011
    • Introduction
      An droid
      a robot with a human appearance.
      What’s an Android?
      “Android is a software stack for mobile devices
      that includes an operating system, middleware
      and key applications”
    • Introduction
      What’s an Android?
      Operating System for Mobile Devices
      HTC G1, GOOGLE NEXUS S
      SDK
      Compiler, tools and IDE
      Market
      Free or paid
      A Platform for your Applications
      Based on the Linux kernel, Development on JAVA
    • Introduction
      Google’s Master Plan
      • make the cloud more accessible
      • increase connectivity
      • make the client more powerful
    • Introduction
      Google’s Master Plan
      August 2005
    • Introduction
      Google’s Master Plan
      Open Handset Alliance
      November 2007
    • Introduction
      Google’s Master Plan
      Open Handset Alliance
      November 2007
    • Introduction
      Google’s Master Plan
      Android SDK
      November 2007
    • Introduction
      Google’s Master Plan
      September 2008
    • Introduction
      Google’s Master Plan
    • Why Android?
      Free of cost
      Available to all
    • Why Android?
      Thousands of useful apps
      Open Market Place
    • Why Android?
      Develop on any platform.
      Windows,Mac,Linux
      Not just for mobile
    • Platform
      Hardware
      Android is not a single piece of hardware; it's a complete, end-to-end software
      platform that can be adapted to work on any number of hardware configurations.
      Everything is there, from the bootloader all the way up to the applications.  
      Operating System(s)
      Android uses Linux for its device drivers, memory management, process
      management, and networking.
      The next level up contains the Android native libraries. They are all written in
      C/C++ internally, but you’ll be calling them through Java interfaces. In this layer
      you can find the Surface Manager, 2D and 3D graphics, Media codecs, the
      SQL database (SQLite), and a native web browser engine (WebKit).
      Dalvik Virtual Machine. Dalvik runs dex files, which are converted at compile
      time from standard class and jar files.
    • Platform
      Network Connectivity
      It supports wireless communications using:
      GSM mobile-phone technology
      3G
      Edge
      802.11 Wi-Fi networks
      Security
      Android is a multi-process system, in which each application (and parts of the system) runs in its own process. Most security between applications and the system is enforced at the process level through standard Linux facilities, such as user and group IDs that are assigned to applications.
    • Platform
    • Getting Started
      Android – The Family
       
      Android 3.0 (Honeycomb)
      SDK Ver 11
      Android 2.3.3 (Gingerbread) SDK Ver 10
      Android 2.3 (Gingerbread) SDK Ver 9
      Android 2.2 (Froyo)
      SDK Ver 8
      Android 2.1 (Eclair)
      SDK Ver 7
      Android 1.6 (Donut)
      SDK Ver 4
      Android 1.5 (Cupcake)
      SDK Ver 3
    • Getting Started - Prerequisites
      Things Required ?
      Java Developers Kit(JDK)
      Android SDK
      Eclipse or any other IDE
      Android Development Tool ADT
      Where to find all these ?
      Lets see !!
      IDE - Integrated Development Environment
    • Getting Started - Prerequisites
      Java Developers Kit (JDK)
      http://www.oracle.com/technetwork/java/javase/downloads/index.html
      Or Google – “download jdk” :P
    • Getting Started - Prerequisites
      Java Developers Kit (JDK)
    • Getting Started - Prerequisites
      Java Developers Kit (JDK)
    • Getting Started - Prerequisites
      Android SDK
      http://developer.android.com/sdk/index.html
    • Getting Started - Prerequisites
      Eclipse - IDE
      http://www.eclipse.org/downloads/
    • Getting Started - Prerequisites
      Android Developer Tool (ADT)
      Add https://dl-ssl.google.com/android/eclipse/ to Eclipse Update Manager
    • Getting Started - Prerequisites
      Things Required ?
      Java Developers Kit(JDK)
      Android SDK 
      Eclipse or any other IDE 
      Android Development Tool ADT
      IDE - Integrated Development Environment
    • Getting Started - Installing
      Preparing the Environment
      Installing
      JDK
      Eclipse
      Android SDK
      ADT
      Lets see how it is done
    • Getting Started - Installing
      Preparing the Environment
      After Installing JAVA
    • Getting Started - Installing
      Preparing the Environment
      After Installing Android SDK
      *skip this step if you have the folder that we gave you
    • Getting Started - Installing
      Preparing the Environment
      Adding Platforms and Other Components
      *skip this step if you have the folder that we gave you
    • Getting Started - Installing
      Preparing the Environment
      *skip this step if you have the folder that we gave you
    • Getting Started - Installing
      Preparing the Environment
      Set Up ADT
    • Getting Started - Installing
      Preparing the Environment
    • Getting Started - Installing
      Preparing the Environment
    • Getting Started - Installing
      Preparing the Environment
      If this option is available , then the installation was done correctly
    • Getting Started - Installing
      Preparing the Environment
      Location of the sdk folder
    • Getting Started – Hello Android !!
      Hello Android !!
    • Getting Started – Hello Android !!
      Creating a New Android Project
      From Eclipse,
      Select File > New > Project > Android Project (only after everything was set up properly)
    • Getting Started – Hello Android !!
      Creating a New Android Project
      Fill in the project details with the following values:
      Project name: HelloAndroid
      Application name: HelloAndroid
      Package name: com.example.helloandroid
      Create Activity: HelloAndroid
    • Getting Started – Hello Android !!
    • Getting Started – Hello Android !!
    • Getting Started – Hello Android !!
    • Getting Started – Hello Android !!
      Project Name
      This is the Eclipse Project name — the name of the directory that will contain the project files.
      Application Name
      This is the human-readable title for your application — the name that will appear on the Android device.
      Package Name
      This is the package namespace (following the same rules as for packages in the Java programming language) that you want all your source code to reside under. The example above uses the "com.example" namespace
      Create Activity
      An Activity is simply a class that can run and do work. It can create a User Interface if it chooses, but it doesn't need to. As the checkbox suggests, this is optional, but an Activity is almost always used as the basis for an application.
    • Source directories, where your classes go…
      SOURCE CODE
      Getting Started – Hello Android !!
    • Getting Started – Hello Android !!
      package com.example.helloandroid;
      import android.app.Activity;
      import android.os.Bundle;
      public class HelloAndroid extends Activity {
      /** Called when the activity is first created. */
      @Override
      public void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
      }
      }
    • Getting Started – Hello Android !!
      Run the Application
      The Eclipse plug-in makes it easy to run your applications:
      Select Run > Run.
      Select "Android Application".
      `
    • Getting Started – Hello Android !!
      Run the Application
      OOPS!! An Error
    • Getting Started – Running Your Application
      Create an Android Virtual Device (Emulator )
      An Android Virtual Device (AVD) is an emulator that simulates a real-world Android device, such as a mobile phone or Tablet PC. You can use AVDs to test how your application performs on a wide variety of Android devices, without having to buy every gadget on the market.
      Start the AVD Manager:
      In Eclipse: select Window > Android SDK and AVD Manager, or click the Android SDK and AVD Manager icon in the Eclipse toolbar.
      *only one time process
    • Getting Started – Running Your Application
      Create an Android Virtual Device (Emulator )
      In the Virtual Devices panel, you'll see a list of existing AVDs. Click New to create a new AVD. The Create New AVD dialog appears.
      *only one time process
    • Getting Started – Running Your Application
      Create an Android Virtual Device (Emulator )
      Fill in the details for the AVD.
      Give it a name, a platform target, an SD card size, and a skin (HVGA is default). You can also add specific hardware features of the emulated device by clicking the New... button and selecting the feature.
      *only one time process
    • Getting Started – Running Your Application
      Start an Android Virtual Device (Emulator )
    • Getting Started – Running Your Application
      It takes times to start up the emulator...
    • Getting Started – Running Your Application
    • Getting Started – Hello Android !!
      Lets run the App again !!
      Select Run > Run.
      Select "Android Application".
      or
      Press Ctrl + F11
      `
    • Getting Started – Running Your Application
      Congratulations your first Android App !!
    • Getting Started – Running Your Application
    • Getting Started – Running Your Application
    • Understanding the Code
      Activity: A single screen.
      Your app is made up of
      one or more Activities
      Service: A task that can
      be running while not
      visible.
    • Understanding the Code
      Intent: Code to
      accomplish a verb, like
      “call number” or “open
      comic” and to allow app to
      app communication.
    • Understanding the Code
      Content Provider: Data
      and an API that any app
      can access.
      Android provides contact information
      through a Content Provider.
    • Understanding the Code
      Resource: Text, pictures,
      sound, etc. Everything is
      broken out of the code
      into a resource, which is
      compiled into a class
      called R
    • Understanding the Code
      Drawable: A bitmap or xml
      definition of something
      that can be drawn.
    • Understanding the Code
      The manifest
      • Declares the permissions the application will need
      (uses-permission)
      • Declare permissions that activities or services might require to use your app (permission)
      • Defines the activities, services, broadcast receivers etc
      • Provide hardware access
      And much more..
    • Understanding the Code
      <?xml version="1.0" encoding="utf-8"?>
      <manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.bikerolas"
      android:versionCode="30"
      android:versionName="1.2">
      <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
      <uses-permission android:name="android.permission.ACCESS_LOCATION />
      <uses-permission android:name="android.permission.ACCESS_GPS" />
      <uses-permission android:name="android.permission. ACCESS_CELL_ID />
      <application android:icon="@drawable/flingicn1" android:label="@string/app_name" android:debuggable="false">
      <activity android:name=".Fling"
      android:label="@string/app_name">
      <intent-filter>
      <action android:name="android.intent.action.MAIN" />
      <category android:name="android.intent.category.LAUNCHER" />
      </intent-filter>
      </activity>
      <service android:name=".FlingService" />
      <receiver android:name=".FlingServiceManager"
      android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
      <intent-filter>
      <action android:name="android.intent.action.BOOT_COMPLETED" />
      </intent-filter>
      </receiver>
      </application>
      <uses-sdkandroid:minSdkVersion="2"></uses-sdk>
      </manifest>
    • Understanding the Code
      The XML Layout
      Lets have a look *
      *Screen-cast
    • Understanding the Code
      To be continued…
       
    • Q & A
      Any questions?
       
    • Thank You !!