java.lang.NoClassDefFoundError: Failed resolution of: Ljava/util/Optional;

[jgmGit]

Doesn't work with Android Version 6.0.1.
I am using library version com.networknt:json-schema-validator:0.1.18. Is there something that can be done ?

04-07 11:28:10.932 3799-3813/? I/TestRunner: java.lang.NoClassDefFoundError: Failed resolution of: Ljava/util/Optional;
        at com.networknt.schema.JsonMetaSchema.newValidator(JsonMetaSchema.java:241)
        at com.networknt.schema.ValidationContext.newValidator(ValidationContext.java:24)
        at com.networknt.schema.JsonSchema.read(JsonSchema.java:116)
        at com.networknt.schema.JsonSchema.<init>(JsonSchema.java:56)
        at com.networknt.schema.JsonSchema.<init>(JsonSchema.java:49)
        at com.networknt.schema.JsonSchema.<init>(JsonSchema.java:44)
        at com.networknt.schema.JsonSchemaFactory.newJsonSchema(JsonSchemaFactory.java:144)
        at com.networknt.schema.JsonSchemaFactory.getSchema(JsonSchemaFactory.java:165)

[stevehu]

@johnygeorge We are trying our best to ensure that this library is Java 6 compatible so that more users can use it. However, we don't have Andriod environment to verify that. Thanks a lot for bringing it up.

It is addressed in #84

[stevehu]

I have just released a new version 0.1.19 and it will be soon available from Maven Central. Please verify if there are other issues in Android environment. Thanks for your help.

https://github.com/networknt/json-schema-validator/releases/tag/0.1.19

[jgmGit]

It works now. Thanks a lot for your quick and fast support.

[stevehu]

@johnygeorge Thanks you!!! We are all working together for the community.