Joemarie Comeros Amparo Android Development Orientation for Starters

Android is an open mobile phone platform that was developed by Google and later by Open Handset Alliance. Google defines Android as a "software stack" for mobile phones. Software stack is made up of operating system(the platform on which everything runs), the middleware (the programming that allows applications to talk to a network and to one another) and the applications (the actual programs that phone will run) What is Android?

July Google Inc. bought from Danger In Open Handset Alliance was formed headed by Google which is composed of companies like Intel, T-Mobile, Spring Nextel and more. In 2008, Android became available as an open source and ASOP(Android Open Source Project) is responsible for maintaining and development of android. February 2009, the first android version was released, Android 1.1. for Mobile G1. Brief History

Android OS Versions: > Android 1.1 > Android 1.5 Cupcake > Android 1.6 Donut > Android 2.0/2.1 Eclair > Android 2.2.x Froyo > Android 2.3.x Gingerbread > Android 3. x Honeycomb > Android 4.0.x Ice Cream Sandwich > Android 4.1 Jelly Bean Brief History - continuation

Android Version Market Share

What will you need? Computer running Windows, Linux, or Mac OS X Java SDK Google Android SDK Integrated Development Environment (IDE)

Please refer to: Installation

Android Development Tool Android SDK and Virtual Device Manager Android Emulator / Phone Dalvik Debug Monitoring Service SQLite3 …more

Application Components Activity Present a visual user interface for one focused endeavor the user can undertake Example: a list of menu items users can choose from Services Run in the background for an indefinite period of time Example: calculate and provide the result to activities that need it Broadcast Receivers Receive and react to broadcast announcements Example: announcements that the time zone has changed Content Providers Store and retrieve data and make it accessible to all applications Example: Android ships with a number of content providers for common Intents Hold the content of a message Example: convey a request for an activity to present an image to the user or let the user edit some text

Activities

Services Run in the background o Can continue even if Activity that started it dies o Should be used if something needs to be done while the user is not interacting with application  Otherwise, a thread is probably more applicable o Should create a new thread in the service to do work in, since the service runs in the main thread Can be bound to an application o In which case will terminate when all applications bound to it unbind o Allows multiple applications to communicate with it via a common interface Needs to be declared in manifest file Like Activities, has a structured life cycle

Services

Project Components SRC The project source code GEN Auto generated code Example: R.java Included libraries Resources Drawables Layout Values like strings Manifest File A must have xml file. Contains essential information about the system to the android system

XML Used to define some of the resources o Layouts (UI) o Strings Manifest file Shouldn’t usually have to edit it directly, Eclipse can do that for you Preferred way of creating UIs o Separates the description of the layout from any actual code that controls it o Can easily take a UI from one platform to another

R Class Auto-generated: you shouldn’t edit it Contains IDs of the project resources Enforces good software engineering Use findViewById and Resources object to get access to the resources o Ex. Button b = (Button)findViewById(R.id.button1) o Ex. getResources().getString(R.string.hello));

Layouts Eclipse has a great UI creator o Generates the XML for you Composed of View objects Can be specified for portrait and landscape mode o Use same file name, so can make completely different UIs for the orientations without modifying any code

Layouts - continuation

Click ‘Create’ to make layout modifications When in portrait mode can select ‘Portrait’ to make a res sub folder for portrait layouts o Likewise for Landscape layouts while in landscape mode o Will create folders titled ‘layout-port’ and ‘layout-land’ Note: these ‘port’ and ‘land’ folders are examples of ‘alternate layouts’, see here for more info o Avoid errors by making sure components have the same id in both orientations, and that you’ve tested each orientation thoroughly

Layouts - continuation

Running in Eclipse Similar to launching a regular Java app, use the launch configurations Specify an Android Application and create a new one Specify activity to be run Can select a manual option, so each time program is run, you are asked whether you want to use the actual phone or the emulator o Otherwise, it should be smart and use whichever one is available

Please refer to : Google Maps

<LinearLayout xmlns:android=" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <com.google.android.maps.MapView android:layout_width="fill_parent" android:layout_height="fill_parent" android:enabled="true" android:clickable="true" android:apiKey=“Your API Key Here" />

Installation: Google API: Android Developer’s Website : Numerous Forums & other developer sites, including: o o o o Resources & Acknowledgements

Joemarie Comeros Amparo Android Developer Skype/Ymail/Gmail : joemarieamparo THANK YOU VERY MUCH!