You don’t have to be any sort of market analyst to know that there are a few important platforms and Android is one of them. There are so many smartphones, tablets, glasses, and watches out there, coming from so many manufacturers, and they’re all trying to jump into the game. Then you’ll have more tools at your disposal for your next mobile project. If you have experience developing for iOS, you can become well-versed in the ways that the two platforms coincide and differ (we’ll discuss a few in this tutorial) and what you like about each.Android’s policies on device provisioning and app submission are more open than Apple’s, meaning that once you complete your first app-as you’ll do in this tutorial-you and your friends can enjoy it on your devices right away!.You’ll be plugged into the open source platform with (at the time of press) the largest market share of smart devices worldwide.If that’s not enough, here are a few more reasons to learn Android: With over one billion devices activated, Android is an exciting space to make apps to help you communicate, organize, educate, entertain or anything else you’re passionate about. –The first blog comment after any iOS app gets announced.Ĭlearly there’s a demand for Android app development, and it’s turning the platform with the lovable green mascot into more and more of a strong first choice rather than just a secondary option to iOS. “But when does the Android version come out?” The SQLite database would store the data, which would be accessed via the provider.Update 11/10/14: We have updated this tutorial for the most recent version of Android Studio – check out the updated version here. Or you can register for the event that the state of the phone changes, e.g., someone is calling.Ī provider defines a structured interface to application data.Ī provider can be used for accessing data within one application, but can also be used to share data with other applications.Īndroid contains an SQLite database which is frequently used in conjunction with a content provider. They can communicate with other Android components and send notifications to the user.įor example, a broadcast receiver can notify the user via the notification framework in Android.Ī receiver can be registered to listen to system messages and intents.Ī receiver gets notified by the Android system if the specified event occurs.įor example, you can register a receiver for the event that the Android system finished the boot process. If not explicitly defined, Android creates a default application object for your application.Īn activity is the visual representation of an Android application.Īn Android application can have several activities.Īctivities use views and fragments to create their user interface and to interact with the user.Ī service performs tasks without providing a user interface. It is the last component which is stopped during application shutdown. Android application components ComponentĪn Android application can have one Application class which is instantiated before any other Android component. You can define the following components in your configuration files: Table 8. Package import import android.os.Bundle import import import import public class MainActivity extends Activity Īn Android application (app) is a single installable unit which can be started and used independently.Īn Android application consists of configuration files, Java source and resource files. You access them via an InputStream object.ĭefines the actions which can be used in the toolbar of the application. XML files with layout descriptions are used to define the user interface for activities and fragments.įiles which define the appearance of your Android application.ĭefines animations in XML for the animation API which allows to animate arbitrary properties of objects over time.Īrbitrary files saved in their raw form. In a separate file, e.g., strings are defined in Used to define strings, colors, dimensions, styles andĪrrays of strings or integers via XML files. Images (e.g., png or jpeg files)or vector drawables or XML files which scale automatically with the density of the Android device The following table gives an overview of the supported resources and their standard folder prefixes.
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