Android Program project structure (ii)

Once you've created your first Hello World project with Android Studio, we'll see the project structure using Project mode.

　　

I.. Gradle and. Idea

These two directories are placed in some files that are automatically generated by Android studio.

Second, build

Mainly contains some files that are automatically generated at compile time.

Third, Gradle

Contains the configuration file for the Gradle wrapper.

Iv.. Gitignore

Excludes the specified directory or file from version control.

Wu, Build.gradle

The global gradle build script. Use a groovy-based domain-specific language (DSL) to declare project settings, discarding the various configurations based on XML (Ant and Maven).

Liu, Gradle.properties

Global Gradle configuration file

VII, Gradlew and Gradlew.bat

In the command line interface to execute the gradle command, Gradlew is used on Linux and Mac systems.

Eight, HELLOWORLD.IML

Identify this is a Intelij idea project.

Nine, Local.properties

Specifies the path of the Android SDK in this computer.

Ten, Settings.gradle

Specifies all the introduced modules in the project.

Xi. app directory (CORE)

1. Build

It also contains some files that are automatically generated at compile time.

2, Libs

The third-party jar packages that are used are automatically added to the build path.

3. src

Androidtest: Writing the androidtest test case.

Main: Where Java code is placed

Test: Write the Unit test case

4. Gitignore, APP.IML, Build.gradle

Like the above.

5, Proguard-rules,pro

The obfuscation rule used to specify the project code.

Understanding Code Files:

　　

The Oncreat () method in a Java file is a method that must be executed when an activity is created.

　　

Layout file:

　　

Android Program project structure (ii)