Googlepay is not working in kitkat, Lollipop and marshmallow phones

[rspapneja]

Process: com.google.android.gms.samples.wallet, PID: 9690
java.lang.NoClassDefFoundError: Failed resolution of: Ljava/util/Optional;
at com.google.android.gms.samples.wallet.PaymentsUtil.getIsReadyToPayRequest(PaymentsUtil.java:205)
at com.google.android.gms.samples.wallet.CheckoutActivity.possiblyShowGooglePayButton(CheckoutActivity.java:111)
at com.google.android.gms.samples.wallet.CheckoutActivity.onCreate(CheckoutActivity.java:92)
at android.app.Activity.performCreate(Activity.java:6609)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1134)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3104)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3261)
at android.app.ActivityThread.access$1000(ActivityThread.java:219)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1735)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:145)
at android.app.ActivityThread.main(ActivityThread.java:6939)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)
Caused by: java.lang.ClassNotFoundException: Didn't find class "java.util.Optional" on path: DexPathList[[zip file "/data/app/com.google.android.gms.samples.wallet-1/base.apk"],nativeLibraryDirectories=[/vendor/lib, /system/lib]]
at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:56)
at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
at java.lang.ClassLoader.loadClass(ClassLoader.java:469)
at com.google.android.gms.samples.wallet.PaymentsUtil.getIsReadyToPayRequest(PaymentsUtil.java:205) 
at com.google.android.gms.samples.wallet.CheckoutActivity.possiblyShowGooglePayButton(CheckoutActivity.java:111) 
at com.google.android.gms.samples.wallet.CheckoutActivity.onCreate(CheckoutActivity.java:92) 
at android.app.Activity.performCreate(Activity.java:6609) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1134) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3104) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3261) 
at android.app.ActivityThread.access$1000(ActivityThread.java:219) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1735) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:145) 
at android.app.ActivityThread.main(ActivityThread.java:6939) 
at java.lang.reflect.Method.invoke(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:372) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1404) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199) 
Suppressed: java.lang.ClassNotFoundException: java.util.Optional
at java.lang.Class.classForName(Native Method)
at java.lang.BootClassLoader.findClass(ClassLoader.java:781)
at java.lang.BootClassLoader.loadClass(ClassLoader.java:841)
at java.lang.ClassLoader.loadClass(ClassLoader.java:504)
... 17 more
Caused by: java.lang.NoClassDefFoundError: Class not found using the boot class loader; no stack available