Andriod Application development Concepts

The steps below describe how to create an Android project and run a debuggable version of the app. You’ll also learn some fundamentals of Android app design, including how to build a simple user interface and handle user input.

Set Up Your Environment

Before you start this class, be sure you have your development environment set up. You need to:

• Download Android Studio.
• Download the latest SDK tools and platforms using the SDK Manager.

Step 1: Create Android project – This contains all the files that comprise the source code for your Android app. Instructions below shows how to create a new project either using Android Studio or using the SDK tools from a command line.

1. 1. In Android Studio, create a new project:
      • If you don’t have a project opened, in the Welcome screen, click New Project.
      • If you have a project opened, from the File menu, select New Project.

Figure 1. Configuring a new project in Android Studio.

1. Under Configure your new project, fill in the fields as shown in figure 1 and click Next.It will probably be easier to follow these lessons if you use the same values as shown.
   • Application Name is the app name that appears to users. For this project, use “My First App.”
   • Company domain provides a qualifier that will be appended to the package name; Android Studio will remember this qualifier for each new project you create.
   • Package name is the fully qualified name for the project (following the same rules as those for naming packages in the Java programming language). Your package name must be unique across all packages installed on the Android system. You can Edit this value independently from the application name or the company domain.
   • Project location is the directory on your system that holds the project files.
2. Under Select the form factors your app will run on, check the box for Phone and Tablet.
3. For Minimum SDK, select API 8: Android 2.2 (Froyo).The Minimum Required SDK is the earliest version of Android that your app supports, indicated using the API level. To support as many devices as possible, you should set this to the lowest version available that allows your app to provide its core feature set. If any feature of your app is possible only on newer versions of Android and it’s not critical to the app’s core feature set, you can enable the feature only when running on the versions that support it (as discussed in Supporting Different Platform Versions).
4. Leave all of the other options (TV, Wear, and Glass) unchecked and click Next.