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why am I getting Cannot resolve symbol 'someImpl' error in android studio?

I've been going back and forth with this for 2 days now and haven't been able to find a solution for it.
I'm trying to add an AAR file to my react-native project.
I added the AAR file by going to File >> Project Structure >> JAR/AAR Dependency and added the direct link to the AAR file which is in my libs folder.
I have this in my build.gradle(:app) :
implementation files('/Users/XXX/Desktop/projectName/android/libs/fileName.aar')
implementation(name:'fileName', ext:'aar')
implementation fileTree(dir: '/Users/XXX/Desktop/projectName/android/libs', include: ['*.aar', '*.jar'], exclude: [])
However, when try to compile my app, the compile fails and Android studio complains with this error:
Cannot resolve symbol 'someImpl'
This is the code that its complaining about:
public void ListPrinters(Callback cb){
someImpl printerDiscovery = new someImpl(this.context);
}
what am I doing wrong? and why the studio giving me that error?

Can't add External Library in Android Studio?

I Added a External Library to my project by following
this method. and tried this method too this method too.
Gradle build got Finished and i got this line added to my build.gradle
compile 'com.github.castorflex.smoothprogressbar:library-circular:1.0.1'
Now i am trying to import this library in my class. But i can't do this. I took a look at the files and they are located in the build directory under the exploded-aar. so i added #aar to the compile line. Still there are no changes.
How can i import this library to my class or where i am going wrong?
Thanks in Advance

Well, you don't need to download anything or point your dependency to a file.
This dependency, as most of the dependencies you use, can automatically fetched from JCenter, biggest repository for Java and Android components.
All you need to do is:
Add JCenter as your dependencies repository.
Declare that you need the library-circular dependency. This can be found and copy/pasted from the file icon in particular package/version in JCenter.
Resync your Android Studio project with your Gradle build file. This is the 'sync' button in Gradle pane in Android Studio.
Here's what your build.gradle should include:
repositories {
jcenter()
}
dependencies {
compile(group: 'com.github.castorflex.smoothprogressbar', name: 'library-circular', version: '1.0.1', ext: 'aar')
}

in build. gradle put following code
dependencies {
compile fileTree (dir: 'libs', include: ['*.jar'])
}

Did you add the dependencies?
You can do so in the following way -
dependencies {
compile files('insert ParentFolder/external_library_name with the extension here')
}
Add it to build.gradle based in the app folder

1.Put the jar file into the libs folder.
2.Right click it and hit 'Add as library'.
3.Ensure that compile files('libs/abcdef.jar') is in your build.gradle file and Finally add the dependencies.
Eg.
dependencies {
compile fileTree(dir: '../jar', include: '*.jar')
compile project(':pull-to-refresh')
compile files('libraries/abcdef.jar')
}
Hope this helps :)

Android Studio with Gradle incompatibility (Google Play Services issue)

I am developing an android app with Android Studio 0.8.9. I am using Gradle to build my project.
I want to include google-play-services.jar file into my project in order to use push notification api.
I have added those statements into my gradle (application layer) file as follows:
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile files('libs/google-play-services.jar')
compile files('libs/android-support-v4.jar')
compile files('libs/gson-2.2.3.jar')
compile files('libs/volley_23042014.jar')
compile 'com.google.android.gms:play-services:5.2.08'
}
but it never works. I get the following error:
Multiple dex files define Lcom/google/ads/AdRequest$ErrorCode;
I've checked bunch of websites (including Stackoverflow.com). None of them has worked for me.
I have latest versions of Google Support Library, Google Support Repository, Google Play Services.
Here is my libs directory
My SDK version like:
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="20" />
What I have done wrong? If anyone has any idea please let me know.

If you're including Play Services via:
compile 'com.google.android.gms:play-services:5.2.08'
you don't need this:
compile files('libs/google-play-services.jar')
so just remove it.
Since the first line of your dependencies will make it automatically pick up any jar files you put in your libs directory:
compile fileTree(dir: 'libs', include: ['*.jar'])
make sure you remove the jars from there as well.
For that matter, there are other libraries you shouldn't include via specific jars.
Instead of this:
compile files('libs/android-support-v4.jar')
compile files('libs/gson-2.2.3.jar')
use this:
compile 'com.android.support:support-v4:20.0.0'
compile 'com.google.code.gson:gson:2.2.3
(Note that later versions of GSON are available).

error: package com.facebook.android does not exist in android studio project

I am new to android studio.I am developing an app which uses Facebook SDK.I have downloaded Facebbok SDK and imported it as a module to my android project.I am using latest version of android studio.So I simply imported it and did not make any change in other files for this.First I am trying to use facebook login functionality.But when I build the app I am getting following error.
error: package com.facebook.android does not exist
I could see one solution as an answer to someone's question. But i could not understand it.Please somebody help me.

check you build.gradle
it should got this dependency
if you got library project:
dependencies {
compile project(':facebook');
}
if you got jar files in libs folder:
dependencies {
compile fileTree(include: ['*.jar'], dir: 'libs')
}
or just add maven central dependency to:
dependencies {
compile 'com.github.asne.facebook:facebook:3.17.2'
}

You need to add dependencies on your gradle file :-
compile 'com.facebook.android:facebook-android-sdk:4.1.0'
above is path you need to add dependencies {} like below :-
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.0.0'
compile 'com.facebook.android:facebook-android-sdk:4.1.0'
}

Is the facebook library is jar file or library project?
If is jar file, you just need to add jar file in libs folder and dependencies {
compile fileTree(dir: 'libs', include: '*.jar')
} in build.gradle.
If is library project, you should modify your setting.gradle and build.gradle files.

Adding this line of code to the dependencies in the build.gradle file helped me get rid of the same error.
dependencies {
...
compile 'com.facebook.android:facebook-android-sdk:4.0.0'
}
From platform=android facebook developers
-the last line of the section "Add Facebook SDK to Your Project")

gradle android proguard error

I am having this issue and seem can't figure it out when building gradle android with proguard:
Can't read [C:\Users\xxx\dev\xyz\Xyz-nextgen\build\exploded-bundles\XyzCommonXyz_volleyUnspecified.aar\libs\android-support-v13.jar(;;;;!META-INF/MANIFEST.MF)] (Duplicate zip entry [android/support/a/a/b.class == android-support-v13.jar:android/support/v13/app/FragmentCompat$FragmentCompatImpl.class])
There are 3 library projects and one app project.
All projects use only one android-support-v13.jar.
Thanks.
Andy

Open the module's gradle.build file and
In
dependencies {
compile 'com.android.support:support-v4:13.0.+'
compile files('libs/android-async-http-1.3.1.jar')
compile fileTree(dir: 'libs', include: '*.jar')
}
Change
compile 'com.android.support:support-v4:13.0.+'
To
compile 'com.android.support:support-v4:21.+'
make sure u have updated build tools in the sdk manager and let us know if that works