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For developing the mobile apps (application) in java, J2ME (java micro/mobile edition) is generally required but Android is not strictly a J2ME-compatible platform; however, the Java programming environment found in Android is a plus for J2ME developers. Also, as Android matures, it is very likely that J2ME support will be added in some fashion. Android is primarily developed by Google.
What is Android?
Android is an operating system based on Linux with a Java programming interface. The Android Software Development Kit (Android SDK)provides all necessary tools to develop Android applications. This includes a compiler http://stephaniefulke.blogspot.com /" target="_blank">, debugger and a device emulator, as well as its own virtual machine to run Android programs.Remember Android is just a software environment built for mobile devices. It is not a hardware platform. Android allows background processing, provides a rich user interface library, supports 2-D and 3-D graphics using the OpenGL libraries, access to the file system and provides an embedded SQLite database and much more. And, yes, even telephone functionality is included! While components of the underlying OS are written in C or C++, user applications are built for Android in Java. Even the built-in applications are written in Java however we can still develop the Android apps in C/C++ using NDK(Native Development kit) provided by android platform.
Application components are the essential building blocks of an Android application. The four types of application components:-
1. 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 http://stephaniefulke.blogspot.com /" target="_blank">.
2. Services: - A service is a component that runs in the background to perform long-running operations or to perform work for remote processes. A service does not provide a user interface. 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.
3. Content providers: -A content provider manages a shared set of application data. You can store the data in the file system, a SQLite database, on the web, or any other persistent storage location your application can access.
4. Broadcast receivers: -A broadcast receiver is a component that responds to system-wide broadcast announcements. Many broadcasts originate from the system—for example, a broadcast announcing that the screen has turned off, the battery is low, or a picture was captured.
Android applications consist of different components and can re-use components of other applications. This leads to the concept of a task in Android; an application can re-use other Android components to archive a task.
For example you can write an application which uses the Android Gallery application to pick a photo.
But Before Started To Write Your Own First http://stephaniefulke.blogspot.com /2012/07/know-how-to-develop-simple-android_22.html" target="_blank">Android Application You must Have To Set up Your PC Environment To Develop Your Application..
To Setup A Environment For Android Application Development On Your Computer..
Read More From Here
But Before Started To Write Your Own First http://stephaniefulke.blogspot.com /2012/07/know-how-to-develop-simple-android_22.html" target="_blank">Android Application You must Have To Set up Your PC Environment To Develop Your Application..
To Setup A Environment For Android Application Development On Your Computer..
Read More From Here
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