Getting errors while integrating VISA checkout - android-gradle-plugin

Question

I am integrating VISA checkout payment using the following link: Visa Checkout Integration in Android Studio.
My project is quite heavy. I had imported it from Eclipse which already contained many libraries. While integrating the VISA checkout, I added the the following in the gradle file, and its associated libraries:
compile(name:'VisaCheckout-Android-SDK-4.3', ext:'aar')
When I executed this code without any previous libraries, I didn't get any errors.
However when I run the code in my existing app in Lollipop, I get a blank screen which does not respond even on clicking the hardware back button.
I'm getting some unusual errors such as:
No subscribers registered for event class com.visa.internal.ˌ
No subscribers registered for event class de.greenrobot.event.NoSubscriberEvent
Rejecting re-init on previously-failed class java.lang.Class
In Kitkat, the app crashes showing java.lang.NoClassDefFoundError: com.google.android.gms.analytics.GoogleAnalytics, (since Google Analytics is integrated in my project).
Here's my gradle file:
buildscript {
repositories {
maven { url 'https://maven.fabric.io/public' }
mavenCentral()
}
dependencies {
classpath 'io.fabric.tools:gradle:1.+'
}
}
apply plugin: 'com.android.application'
apply plugin: 'io.fabric'
repositories {
maven { url 'https://maven.fabric.io/public' }
}
android {
compileSdkVersion 23
buildToolsVersion "23.0.3"
useLibrary 'org.apache.http.legacy'
defaultConfig {
applicationId "com.fitcompany.fitness_enthusiasts"
minSdkVersion 11
targetSdkVersion 20
}
buildTypes {
release {
multiDexEnabled true
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
}
}
}
repositories {
flatDir { dirs 'libs'}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.facebook.android:facebook-android-sdk:[4,5)'
compile project(':slidingMenu')
compile 'com.android.support:multidex:1.0.1'
compile 'com.google.android.gms:play-services:4.0.30'
compile 'com.squareup.picasso:picasso:2.5.2'
compile 'com.paypal.sdk:paypal-android-sdk:2.14.2'
compile(name:'VisaCheckout-Android-SDK-4.3', ext:'aar')
compile files('libs/volley.jar')
compile files('libs/gson-2.3.1.jar')
compile files('libs/HockeySDK-3.5.0.jar')
compile files('libs/httpclient-android-4.3.3.jar')
compile files('libs/ksoap2-android-assembly-3.1.0-jar-with-dependencies.jar')
compile files('libs/libGoogleAnalyticsServices.jar')
compile files('libs/YouTubeAndroidPlayerApi.jar')
compile('com.crashlytics.sdk.android:crashlytics:2.5.6#aar') {
transitive = true;
}
}
My libs folder contains the following:
eventbus-2.4.0.jar
gson-2.3.1.jar
HockeySDK-3.5.0.jar
ksoap2-android-assembly-3.1.0-jar-with-dependencies.jar
libGoogleAnalyticsServices.jar
okhttp-2.5.0.jar
retrofit-1.9.0.jar
volley.jar
YouTubeAndroidPlayerApi.jar
VisaCheckout-Android-SDK-4.3.aar

Answer 1

I was using the wrong file in the libs folder. I replaced this line:
VisaCheckout-Android-SDK-4.3.aar
with this one and the error was gone.
VisaCheckout-Android-SDK-2.9.aar

Answer 2

Its because the name of SDK-AAR file in libs folder is in lowercase contrary to one declared in app-gradle.
e.g., 'visacheckout-android-sdk-4.3' instead 'VisaCheckout-Android-SDK-4.3'