How to define common android properties for all modules using gradle

Question

I create a simple project in AndroidStudio with a few modules. Each module\'s gradle script contains the following code:

android {
    compileSdkVersion 18
          


        

Answer 1

Create a custom property for your project. To set a single property use:

project.ext.compileSdkVersion = 21

to set multiple properties use:

project.ext {
    compileSdkVersion = 21
    buildToolsVersion = "21.0.1"
    targetSdkVersion = 21
}

Answer 2

There is a new way simpler method, in the updated Android Studio. You have a file named "gradle.properties" in the top project hierarchy exactly for that. Simply define your parameters there:

common_parameter='I am common"

And use it in the modules' gradle files (build.gradle) as such:

module_parameter = common_parameter

That's it.