Hi. 

I've written an app with Kinvey several years ago, and I wished to make some upgrades. However, I found that the coding had changed recently, so I'm trying to adapt my app into the new versions of Kinvey libraries. 

The major problem is that I couldn't upload entities into my Kinvey database with the dataStore.save(Entity, KinveyClientCallback) method. It would run to onSuccess. I have checked that the values in my entity was correct.  It seemed that it worked without an error, but my collection was still empty no matter how I tried. 

It might seem quite stupid, but I really need your expertise advice. Thank you. 

Work with Android Studio 3.1.4 

compile SDK version v3.1.4

API version 28

 implement all libraries as the Kinvey Sample App 

build with classpath 'com.android.tools.build:gradle:3.2.0-alpha17' 

dependencies include: 

implementation fileTree(dir: 'libs', include: ['*.jar']) 

testImplementation 'junit:junit:4.12' 

implementation 'com.android.support:appcompat-v7:28.0.0-alpha1' 

implementation 'com.android.support:design:28.0.0-alpha1' 

implementation 'com.android.support:multidex:1.0.1' 

implementation ':kinvey-android:+@aar' 

implementation ':realm-android-library:+@aar' 

implementation ':relinker:+@aar' 

implementation 'com.android.support.constraint:constraint-layout:1.1.3'

(the corresponding app on kinvey was named "CKDDIET")