update

 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_7" project-jdk-name="1.8" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

@@ -20,4 +20,5 @@ android {
 dependencies {
     implementation fileTree(include: ['*.jar', '*.aar'], dir: 'libs')
     //    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
+    implementation files('libs/PoolSdk_V2_200102.jar')
 }