Developing Apps with Eclipse Lesson 7: Lesson 7 completes this course by teaching you how to use Eclipse to develop W2A.
September 13, by Bryan Wilde Mobile application development is the hottest thing in the programming world right now. The two most popular mobile platforms are Android and iOS Apple. Although the numbers tend to fluctuate frequently, it seems that Android has taken the top spot from Apple.
If it seems like a popular platform that you should be learning nowyou are right!
Not only is Android popular, but it could also become a very profitable platform once you start creating your own apps. If you already have some experience in Java, you are one step ahead of the curve.
If not, consider taking the Java Programming Tutorial to get up to speed in Java programming quickly. Each android application is comprised of four unique components.
Combined, these four components create all Android applications currently available via the Google Play Store or other outlets such as the Amazon App Store. You can learn more about these components in Android Development for Beginners.
Activities In Android, an activity is any single screen with a user interface. A good example is an email application. One activity shows you the inbox, another activity is used to compose new emails, and another activity allows you to read emails.
For the uninitiated, this may seem like extra work. Actually, this makes your job as an Android programmer much easier because the modular design allows you to change one aspect of the application without affecting the rest. For instance, you may want a different color scheme when users create a new email that differs from colors used in the rest of the app.
Using activities makes this a very simple task. Services Services run in the background. They are responsible for long-running operations or performing work that does not require user interaction. Services do not have a user interface. Music players often run as services so the music will continue to play in the background even when the user switches to a different screen.
Another popular service implementation is retrieving background data. For instance, if you ever use Gmail, you are familiar with push notifications. A service running in the background checks for new mail periodically without manual intervention from the user.
This is a perfect example of a service in action. Content Providers Content providers help manage application data. In the Android operating system, data can be stored within the file system, in a separate SQLite database, on the Web, or in other storage locations such as a microSD card.
You can learn more about accessing and modifying storage locations in Android Programming for Beginners. Built into the Android system is an excellent example of a content provider. This application is able to read or write information to the contacts database using content providers.
Broadcast Receivers This component is responsible for responding to system wide broadcast announcements. Although most broadcasts are initiated by the Android system, your application can also create broadcasts that let other system applications know what is going on.
This could be as simple as a status bar notification or it could start another activity or service automatically. Unique Android Components There are numerous reasons why Android is a unique platform that allows developers of all experience levels to successfully create functional applications.
In fact, there are way too many to discuss here. However, one of the most important Android features that allows you to start building complex applications quickly is that your application can start activities and services of existing applications very easily.
If your application needs to use the camera so a user can take a picture, there is no need to write the code for the camera because it already exists. All you need to do is start the activity for the camera application and your application will automatically have full control of the camera and any pictures that are recorded using the camera activity.
This is great news for you because you can create useful applications that use existing code almost exclusively. Not only does this significantly cut down the learning curve, but it also makes programming in Android lots of fun. Instead of focusing on monotonous coding techniques, you can focus on making your app do cool new things.
Creating Apps With a basic understanding of how the Android operating system works, you can start building your own applications. There are two main ways that modern developers actually create applications.This lesson shows you how to create a new Android project with Android Studio and describes some of the files in the project.
First, be sure you have installed the latest version of Android Studio. Download Android Studio here. Apps provide multiple entry points. Android apps are built as a combination of components that can be invoked individually. For example, an activity is a type of app component that provides a user interface..
The "main" activity is what starts when the user taps your app icon, but you can take the user straight into a different activity from other places, such . Android SDK; Eclipse IDE for Java Developers (optional) Android Development Tools (ADT) Eclipse Plugin (optional) You are now ready to create a simple Rock Paper Scissors Android App.
Before we write the code, you need to know how to take input from the user. I want to ask that what I have to learn to code to start making apps like this.
You can take advantage of the powerful Eclipse environment to build Android applications using the Android Eclipse plug-in. This tutorial introduces Android application development with the Eclipse plug-in, otherwise known as Android Development Tools.
Operations to read and write content to a particular data store should be passed through. This tutorial is intended for anyone interested in beginning Android development on Eclipse using the Android development tools plug-in. It offers insight into the salient features of an Android app, along with a brief explanation of its basic components.
The Android process is introduced for developing rich UIs for the apps, as widgets. Writing Your First Android App.
especially those using Eclipse, will have an easy transition to the Android development world. Most apps are written in Java.