After having imported an Eclipse project into Android Studio, I see two build.gradle
files:
1 - <PROJECT_ROOT>\build.gradle
2 - <PROJECT_ROOT>\app\build.gradle
The first version is shorter, the second version contains definitions for compileSdkVersion
, etc.
What is the purpose behind having two separate files? Are there separate build tasks?
<PROJECT_ROOT>\app\build.gradle
is specific for app module.
<PROJECT_ROOT>\build.gradle
is a "Top-level build file" where you can add configuration options common to all sub-projects/modules.
If you use another module in your project, as a local library you would have another build.gradle
file:
<PROJECT_ROOT>\module\build.gradle
For example in your top level file you can specify these common properties:
buildscript {
repositories {
mavenCentral()
}
dependencies {
classpath 'com.android.tools.build:gradle:1.3.0'
}
}
ext {
compileSdkVersion = 23
buildToolsVersion = "23.0.1"
}
In your app\build.gradle
apply plugin: 'com.android.application'
repositories {
mavenCentral()
}
android {
compileSdkVersion rootProject.ext.compileSdkVersion
buildToolsVersion rootProject.ext.buildToolsVersion
}