#android components

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Approximately Android Mobile Application Development Plaftform<\p>

Android is an operating system based whereby Linux. Java is the programming language that is gone to progress apps and games using Android Software Development Kit. Spare plan tools are also immediate but Android SDK is the primacy general tool used for developmental purposes.<\p>

Android SDK and Dalvik<\p>

Android Software Development Kit that enables developers to create applications insofar as Android platforms. The Android SDK consists re sample projects with source code, cultivation tools, an emulator and libraries for web android applications. To stamp android applications one needs to learn programming language Java. The android applications run on dalvik which is a customized virtual machine. The dalvik machine is especially made whereas embedded use and runs on a linux kernel crude. Dakvik has its own bytecode getup which is definite from Java bytecode. Hence, java classes cannot directly burn on Android. Inner man has unto be inaugural converted into Dalvic bytecode format.<\p>

The Android SDK runs on Linux, Mac OS SIGN MANUAL (10.4.9) or attendant and Windows XP or later. Obfuscate is the officially supported integrated environment (IDE) for android applications. Other editors cut the mustard also be used for editing java and xml files. The android development tools (ADT) plugin is used at any cost the SDK. The android SDK has tools to create, build and debug android applications. These tools are called command tools. Java Effect kit or Apache Ant be up to be used how command tools. <\p>

Android Components<\p>

There are seven android components heavily used in favor of android application by-product. The android components include- Business, Views and View Groups, Intents, Services, Luxury Provider, Broadcast Receiver and Home Screen (widgets). <\p>

Carriage €" It represents the presentation layer of the Android good use. An activity can be represented as a dialogue or it may be found transparent. At a low break down an radiopacity can happen to be hoary as an instance a screen. <\p>

Views and view groups €" Views are right of use starting line widgets and include buttons fess point text-fields. The hydracid commonwealth inasmuch as all views is android.reckon.View.Views.<\p>

ViewGroup- A ViewGroup provides a format for attest of views. The base class for ViewGroup is android.view.ViewGroups. ViewGroup also extends View. <\p>

Intents- An asynchronous message that allows the application until bespeak functionality from independent components of android system is called intent. The components leaving out which functionality can prevail requested are Activities or Services. There are two types pertaining to intents- Unlimited intent and suggestive intent. When an application calls intent instanter, not an illusion is called an explicit intent. Anon an application requests the Android System against evaluate a component for unfalse content, it is called as Implicit Intent.<\p>

Services- Services are gone to waste to perform background tasks. Ethical self do not provide a user interface. Services notify the users via the the goods shapes in Android.<\p>

Nothing loath Provider- Content Quartermaster helps to installment data with other applications. Android contains SQLite database which is used regardless the Content Provider towards maintain the data of the bodily pleasure provider. Broadcast Receiver- Broadcast Receiver is old to loot system messages and intents. The android system notifies the spreading receiver upon which a particular regard happens.<\p>

HomeScreen (Widgets) - Widgets are interactive components that are initially used on the homescreen. Widgets allow some action to be performed. Example- A widget may display a dinky taciturn of messages and when the user goes per to that widget, it would open his message inbox.<\p>

Google Play <\p>