Between love and madness lies obsession
Platform Presentation
Your First Android Experience
Shrey Malhotra
27 / April / 2011
Introduction
What’s an Android
?
“Android is a software stack for mobile devices
that includes an operating system, middleware
and key applications”
An droid
a
robot with a
human appearance.
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
August 2005
Google’s Master Plan
Introduction
Open Handset Alliance
November
2007
Google’s Master Plan
Introduction
Open Handset Alliance
November
2007
Google’s Master Plan
Introduction
Android SDK
November 2007
Google’s Master Plan
Introduction
September 2008
Google’s Master Plan
Introduction
Google’s Master Plan
Why Android?
Why Android?
Why Android?
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
Platform
Getting Started
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
Android
–
The Family
Getting Started
-
Prerequisites
Where to find all these ?
Lets see !!
IDE
-
Integrated Development Environment
Things
R
equired ?
Java Developers Kit(JDK)
Android SDK
Eclipse or any other IDE
Android Development Tool ADT
Getting Started
-
Prerequisites
Java Developers Kit (JDK)
http://www.oracle.com/technetwork/java/jav
ase/downloads/index.html
Or Google
–
“
download jdk
” :P
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
or directly download it from
http://dl.google.com/android/ADT
-
10.0.1.zip
Getting Started
-
Prerequisites
Things
R
equired ?
Java Developers Kit(JDK)
Android SDK
Eclipse or any other IDE
䅮摲潩搠䑥v敬潰e敮琠e潯氠䅄T
IDE
-
Integrated Development Environment
Getting Started
-
Installing
Installing
JDK
Eclipse
Android SDK
ADT
Lets see how it is done *
Preparing the Environment
*Screen
-
cast
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.
Getting Started
–
Hello Android !!
SOURCE CODE
Source
directories,
where your
classes go…
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 )
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.
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.
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.
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.
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
-
sdk
android:minSdkVersion
=
"2"></uses
-
sdk
>
</manifest>
Understanding the Code
The XML Layout
Lets have a look *
*Screen
-
cast
Understanding the Code
To be continued…
Any questions?
Q & A
Thank You !!
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