How to Manually Include External Aar Package Using Gradle For Android

How to manually include external aar package using Gradle for Android

Please follow below steps to get it working ( I have tested it up to Android Studio 2.2)

Lets say you have kept aar file in libs folder. ( assume file name is cards.aar )

then in app build.gradle specify following and click sync project with Gradle files.
Open Project level build.gradle and add flatDir{dirs 'libs'} like did below

allprojects {
   repositories {
      jcenter()
      flatDir {
        dirs 'libs'
      }
   }
}

and now open app level build.grdle file and add .aar file

    dependencies {
       implementation(name:'cards', ext:'aar')
}

If everything goes well you will see library entry is made in build -> exploded-aar

Also note that if you are importing a .aar file from another project that has dependencies you'll need to include these in your build.gradle, too.

How to import .AAR module on Android Studio 4.2

From Android Studio package manager select project:

Then make a new directory in project level named libs

Now right click the libs and select Reveal in finder and then paste here your .aar file.

Now in Build.gradle(Module) add the following implementation.

implementation files('../libs/testaarfile.aar') 

and snyc your project.

How to Add and Use an AAR in AndroidStudio Project

When you import an AAR from built in helper tools using Import aar/jar option,
studio creates a module with this aar.

So at this state you can see something similar to the state mentioned below.
When display panel is Android,

Change your panel mode to Project and open your testaar , you can actually see a build.gradle file for your module and the corresponding aar.

That is why your statement

compile( name:'Ref', ext:'aar' )

was not working.

To add this aar to your project(after using import aar/jar), what you can do is to first add the module to the settings.gradle (Project settings file)

include ':app', ':testaar'

then directly add to your application level build.gradle file

implementation project(':testaar')

2)Another way is to

Right-click on your Application Module ->Select Open Module Settings -> Select the Module -> Go to Dependencies tab

P.S you can also open this window from Build->Edit Libraries and Dependencies

You will come across a window as below

Click on the small + icon, then Module option and finally add the required module(testaar)

Sync your code and voila it will start working now.

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