![]() ![]() Normally, layout files have a layout manager as their root element (for example, LinearLayout, FrameLayout, ConstraintLayout, and so on). This pane shows a rectangular canvas that is synchronized with the layout definition and with the Component Tree, so any changes to the canvas are reflected there accordingly. Note that since IntelliJIDEA downloads the components required to render layout files, opening it may take a few seconds.īy default, IntelliJIDEA provides a graphical view of the layout file, but you can also switch to the source code view, or view the text and the graphical representation side by side - use the icons in the top-right corner of the UI Designer pane: In the Android project view, go to the app/res/layout and double-click the activity_main.xml file to open it. Let us modify the auto-generated user interface and see how the application layout is rendered without running it on any physical or virtual device. Edit the UI layoutĪt this stage, the user interface of our sample HelloDroid application is based on a very simple layout defined in the activity_main.xml file located in the res/layout folder. The Gradle Scripts folder contains all the project's build-related configuration files. Res: contains all non-code resources, such as XML layout files, UI strings, images, and so on. ![]() Java: contains the Java source code files grouped by packages, including JUnit tests. It also declares the entry points of the application, along with permissions the application requires. Among other things, it declares the package name that serves as a unique identifier for your application and the minimum version of the Android SDK required for the device where the application will run. Manifests: contains the AndroidManifest.xml file, which holds general information about the application processed by the Android operating system. The app folder consists of the following subfolders: Note that it hides project files and directories that you don't commonly use (to see them, choose the Project view): This view doesn't reflect the actual hierarchy of files on your disk - it is organized by modules and file types to ease navigation between source files of your project. ![]()
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