Aptech Apps
- 2. WHAT IS ANDROID? A Software platform and operating system for mobile. Based on the Linux kernel. Android was found way back in 2003. It was developed in Palo Alto, California. Android was developed by the Andy Rubin, Rich Miner, Nick Sears and Chris White. Android was purchased by the GOOGLE in AUGUST,2005 for 50 million $.
- 3. Android Environment Setup Java JDK5 or JDK6 Android SDK Eclipse IDE for Java Developers (optional) Android Development Tools (ADT) Eclipse Plugin (optional)
- 4. SDK - Software Development KIT Android Studio Use Java – Only For Android ADT – Android Developer Tools AVD – Android Virtual Device—Testing Point of View NDK Tool Download Developer.android.com Click on SDK ---- Download the NDK
- 5. Making source code available to everyone inevitably invites the attention of hackers. Android operating system uses more amount of battery as compared to normal mobile phones. As there are so many user sometimes it becomes difficult to connect all the users. As we call Android is world of applications we continuously need to connected with the internet which is not possible for all the users.
- 6. Android is not a single piece of hardware. Android supports wireless communication using:- 3G Networks 4G Networks 802.11 Wi-Fi Networks Bluetooth Connectivity Android is a multi-process system, in which each application (and parts of the system) runs in its own process
- 7. Interface that is better then the previous touch screen mobiles. User gets millions of applications that user can not get in any other mobile operating system. Android supports advanced audio/video/still media formats such as MPEG-4, H.264, MP3, and AAC, AMR, JPEG, PNG, GIF. Developing an android application is not tough using SDK(standard development kit) and java emulator we can easily develop applications that we want
- 8. Android Beta First Version of Android. The focus of Android beta is testing incorporating usability. Android beta will generally have many more problems on speed and performance. Android Astro 1.0 First full version of android. Released on September 23, 2008. Wi-Fi and Bluetooth support. Quite slow in operating. copy and paste feature in the web browser is not present.
- 9. Released on April 30, 2009. Added auto-rotation option. Copy and Paste feature added in the web browser. Increased speed and performance but not upto required level Android Donut 1.6 Released on September 15, 2009. Voice search and Search box were added. Faster OS boot times and fast web browsing experience. Typing is quite slower. Android Éclair 2.0/2.1 Released on October 26, 2009. Bluetooth 2.1 support. Improved typing speed on virtual keyboard, with smarter dictionary. no Adobe flash media support
- 10. Android Froyo 2.2 Released on May 20, 2010. Support for Adobe Flash 10.1 Improved Application launcher with better browser No internet calling Android Gingerbread 2.3 Released on December 6, 2010. Updated User Interface with high efficiency and speed Internet calling One touch word selection and copy/paste. New keyboard for faster word input. More successful version of Android than previous versions. not supports multi-core processors. Android Honeycomb 3.0 Released on February 22, 2011. Support for multi-core processors Ability to encrypt all user data. This version of android is only available for tablets.
- 11. Android IceCreamSandwich(ICS) 4.0 Released on November 14, 2011. Virtual button in the UI. A new typeface family for the UI, Roboto. Ability to shut down apps that are using data in the background Android JellyBean 4.1 Released on June 27, 2012. Latest version of Android. Smoother user interface .
- 14. Application components are the essential building blocks of an Android application. These components are loosely coupled by the application manifest file AndroidManifest.xml that describes each component of the application and how they interact. Components Description Activities They dictate the UI and handle the user interaction to the smartphone screen Services They handle background processing associated with an application. Broadcast Receivers They handle communication between Android OS and applications. Content Providers They handle data and database management issues.
- 15. Activities An activity represents a single screen with a user interface. For example, an email application might have one activity that shows a list of new emails, another activity to compose an email, and another activity for reading emails. If an application has more than one activity, then one of them should be marked as the activity that is presented when the application is launched. An activity is implemented as a subclass of Activity class as follows: public class MainActivity extends Activity { }
- 16. Services A service is a component that runs in the background to perform long-running operations. For example, a service might play music in the background while the user is in a different application, or it might fetch data over the network without blocking user interaction with an activity. A service is implemented as a subclass of Service class as follows: public class MyService extends Service { }
- 17. Broadcast Receivers Broadcast Receivers simply respond to broadcast messages from other applications or from the system. For example, applications can also initiate broadcasts to let other applications know that some data has been downloaded to the device and is available for them to use, so this is broadcast receiver who will intercept this communication and will initiate appropriate action. A broadcast receiver is implemented as a subclass of BroadcastReceiver class and each message is broadcasted as an Intent object. public class MyReceiver extends BroadcastReceiver { }
- 18. Content Providers A content provider component supplies data from one application to others on request. Such requests are handled by the methods of the ContentResolver class. The data may be stored in the file system, the database or somewhere else entirely. A content provider is implemented as a subclass of ContentProvider class and must implement a standard set of APIs that enable other applications to perform transactions. public class MyContentProvider extends ContentProvider { }
- 19. Intents are asynchronous messages which allow application components to request functionality from other Android components. Intents allow you to interact with components from the same applications as well as with components contributed by other applications. For example, an activity can start an external activity for taking a picture. Intents are objects of the android.content.Intent type. Your code can send them to the Android system defining the components you are targeting. For example, via the startActivity () method you can define that the intent should be used to start an activity. An intent can contain data via a Bundle. This data can be used by the receiving component.
- 20. To start an activity, use the method startActivity(intent). This method is defined on the Context object whichActivity extends. The following code demonstrates how you can start another activity via an intent. # Start the activity connect to the # specified class Intent i = new Intent(this, ActivityTwo.class); startActivity(i);
- 21. 2.1. Different types of intents Android supports explicit and implicit intents. Explicit Intents Explicit intents explicitly define the component which should be called by the Android system, by using the Java class as identifier. The following shows how to create an explicit intent and send it to the Android system. If the class specified in the intent represents an activity, the Android system starts it.
- 22. Implicit Intents Implicit intents specify the action which should be performed and optionally data which provides content for the action. For example, the following tells the Android system to view a webpage. All installed web browsers should be registered to the corresponding intent data via an intent filter.
- 23. Intent i = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.vogella.com"));startAct ivity(i);