importPackage(Packages["okhttp3"]); //导入包
var client = new OkHttpClient.Builder().retryOnConnectionFailure(true).build();
var request = new Request.Builder().url("ws://192.168.31.164:9317").build(); //vscode 插件的ip地址，
client.dispatcher().cancelAll();//清理一次
myListener = {
onOpen: function (webSocket, response) {
print("onOpen");
//打开链接后，想服务器端发送一条消息
var json = {};
json.type="hello";
json.data= {device_name:"模拟设备",client_version:123,app_version:123,app_version_code:"233"};
var hello=JSON.stringify(json);
webSocket.send(hello);
},
onMessage: function (webSocket, msg) { //msg可能是字符串，也可能是byte数组，取决于服务器送的内容
print("msg");
print(msg);
},
onClosing: function (webSocket, code, response) {
print("正在关闭");
},
onClosed: function (webSocket, code, response) {
print("已关闭");
},
onFailure: function (webSocket, t, response) {
print("错误");
print( t);
}
}

var webSocket= client.newWebSocket(request, new WebSocketListener(myListener)); //创建链接

setInterval(() => { // 防止主线程退出

}, 1000);
然后报错如下：
14:53:14.328/E: java.time.Duration

java.lang.NoClassDefFoundError: java.time.Duration
at libcore.reflect.InternalNames.getClass(InternalNames.java:55)
at java.lang.Class.getDexCacheType(Class.java:2551)
at java.lang.reflect.AbstractMethod.compareParameters(AbstractMethod.java:313)
at java.lang.reflect.Method$1.compare(Method.java:72)
at java.lang.reflect.Method$1.compare(Method.java:66)
at java.util.TimSort.countRunAndMakeAscending(TimSort.java:356)
at java.util.TimSort.sort(TimSort.java:230)
at java.util.Arrays.sort(Arrays.java:1523)
at java.util.Collections.sort(Collections.java:238)
at libcore.util.CollectionUtils.removeDuplicates(CollectionUtils.java:86)
at java.lang.Class.getMethods(Class.java:1423)
at org.mozilla.javascript.JavaMembers.discoverPublicMethods(JavaMembers.java:371)