Develop your first android app using Android Studio
- In the Welcome to Android Studio window, click Start a new Android Studio project.
- Or if you have a project opened, select File > New Project.
- In the Create New Project window, enter the following values:
- Application Name: “My First App”
- Company Domain: “example.com”
You might want to change the project location. Also, if you want to write a Kotlin app, check the Include Kotlin support checkbox. Leave the other options as they are.
- Click Next.
- In the Target Android Devices screen, keep the default values and click Next.
- In the Add an Activity to Mobile screen, select Empty Activity and click Next.
- In the Configure Activity screen, keep the default values and click Finish.
After some processing, Android Studio opens the IDE.
Now take a moment to review the most important files.
First, be sure the Project window is open (select View > Tool Windows > Project) and the Android view is selected from the drop-down list at the top of that window. You can then see the following files:
- app > java > com.example.myfirstapp > MainActivity
- This is the main activity (the entry point for your app). When you build and run the app, the system launches an instance of this
Activityand loads its layout.
- app > res > layout > activity_main.xml
- This XML file defines the layout for the activity’s UI. It contains a
TextViewelement with the text “Hello world!”.
- app > manifests > AndroidManifest.xml
- The manifest file describes the fundamental characteristics of the app and defines each of its components.
- Gradle Scripts > build.gradle
- You’ll see two files with this name: one for the project and one for the “app” module. Each module has its own
build.gradlefile, but this project currently has just one module. You’ll mostly work with the module’s
build.gradlefile to configure how the Gradle tools compile and build your app. For more information about this file, see Configure Your Build.