IssueTracker

launchBillingFlow() does not work on Android 6 (Marshmallow, API 23) devices.

No response, but I found the following logs:

Rejecting re-init on previously-failed class java.lang.Class<com.android.billingclient.api.zzce>

I tried to trace where the problem was. I confirmed that the problem occurs in BillingFlowParams.build()

try {
    BillingFlowParams.newBuilder().setProductDetailsParamsList( list ).build();
} catch ( Throwable th ) {
    th.printStacktrace();
}

Log:

java.lang.NoClassDefFoundError: com.android.billingclient.api.zzce
    at com.android.billingclient.api.BillingFlowParams$Builder.build(com.android.billingclient:billing@@7.1.1:3)
...

It works fine in Play Billing Library 7.0.0 without any code changes in the app.