App-component

-
Application components are the necessary building blocks of an Android application. These components are shown by the application manifest file AndroidManifest.xml that describes each component of the application and how they interact.
There are following  main components that can be used in an Android app:

Activity

An activity is a class that represents a single screen. It is like a Frame in AWT.

View

A view is the UI element such as button, label, text field etc. Anything that you see is a view.

Intent

Intent is used to invoke components. It is mainly used to: Start the service,Launch an activity,Display a web page,Display a list of contacts,Broadcast a message,Dial a phone call etc.

Service

Service is a background process that can run for a long time. There are two types of services local and remote. Local service is accessed from within the application whereas remote service is accessed remotely from other applications running on the same device.

Content Provider

Content Providers are used to share data between the applications.

Fragment

Fragments are like parts of activity. An activity can display one or more fragments on the screen at the same time.

AndroidManifest.xml

It contains informations about activities, content providers, permissions etc. It is like the web.xml file in Java EE.

Android Virtual Device (AVD)

It is used to test the android application without the need for mobile or tablet etc. It can be created in different configurations to emulate different types of real devices.

Comments

Post a Comment

Popular posts from this blog

Android virtual Device(AVD)-build and run program using Emulator

-
Image
An AVD contains a hardware profile, system image, storage area, skin, and other properties. The AVD Manager lets you manage your AVDs all in one place. To run the AVD Manager, do any one of the following: In Android Studio, select Tools > Android > AVD Manager. Click AVD Manager in the toolbar. The AVD Manager appears. It displays any AVDs you’ve already defined. When you first install Android Studio, it creates one AVD. If you defined AVDs for Android Emulator 24.0.x or lower, you need to recreate them. From this page you can: Define a new AVD Edit an existing AVD Delete an AVD Import or export hardware profile definitions. Run an AVD to start the emulator. Stop an emulator. Clear data and start fresh, from the same state as when you first ran the emulator. Show the associated AVD .ini and .img files on disk. View AVD configuration details that you can include in any bug reports to the Android Studio . Creating an AVD 1) You can create a new AVD from ...
Read more

introduction to android

-
Android Tutorials Android is an open source operating system for mobile devices such as smartphones and tablet computers. Android was developed by set Alliance, led by Google, and other companies. This tutorial will teach you basic Android programming through android studio. just add the code to our programme and just make your app easily!!have fun learning android !!hope its usefull too!! Prerequisite Android programming is based on Java programming language so if you have basic understanding on Java programming then it will be a fun to learn Android application development. Android IDEs There are so many Technologies are available to develop android applications, the familiar technologies, which are predominantly using tools as follows (Click on the link to download) Android Studio Eclipse IDE(Deprecated)  link will draw you to the download link page after download install and configure!! for any help comment......
Read more

Simple Hello World Program

-
Image
Let's start programming with Android Framework. Before you start writing your first programme using Android SDK, you have to make sure that you have set-up your Android development environment properly as explained in Android tutorial. I also assume that you have a little bit working knowledge with Android studio. So let's start writing a simple Android Application which will print "Hello World!". The first step is to create a simple Android Application using Android studio. When you start Android studio , it will show screen as shown below:  select start a new android studio project option. In a new installation frame should ask Application name, package information and location of the project as shown below: After entered application name, click on next button it ask on which API application runs on, here need to specify Minimum SDK, in our tutorial, I have choose as API 23: Android 6.0(Marshmallow): After select API, click on next button it...
Read more