Android Engineering Catalog

Create an Android app

File--New--Android application Project

Fill in the Application name, project name, package name

Set up information about the project, and the icon and activity are created by default

The icon can be set directly with the default icon, or via the Browse custom icon

Once the project is created, you get the following directory:

To run the program:

Android directory structure

Summarize:

An Android app with so many files seems very complex.

In fact, we only need to focus on the activity files in SRC, layout files in layouts, strings.xml in values, and Androidmanifest.xml.

An activity represents a screen of a mobile phone screen, each activity corresponds to a layout file, values store some variable value,Androidmanifest.xml is the entire application configuration file, such as the configuration of the application's package name, Specify which activity to start first, the least-configured SDK version, and so on.