NSNetworkManager.ResolveListener消息Android

Question

有人可以解释可以传递给回调的错误消息,即

public void onResolveFailed(NsdServiceInfo serviceInfo, int errorCode)

我以前见过错误代码3,但不知道它意味着什么.文档似乎很好看......

干杯,

Answer 1

我通过再次调用resolveService来解决这个问题.它可能会连续几次失败,但最终会解决.

        @Override
        public void onServiceFound(NsdServiceInfo serviceInfo) {
            Log.d(TAG, "Service found: "+ serviceInfo);
            if (!serviceInfo.getServiceType().equals(SERVICE_TYPE)){
                Log.d(TAG, "Unknown service type: " + serviceInfo.getServiceType());
            } else if (serviceInfo.getServiceName().equals(mServiceName)){
                Log.d(TAG, "Same machine");
            } else {
                startResolveService(serviceInfo);
            }
        }

而不是从onServiceFound中调用resolveService,我调用它的单独声明:

        private void startResolveService(NsdServiceInfo serviceInfo){
            NsdManager.ResolveListener newResolveListener = new NsdManager.ResolveListener() {
                @Override
                public void onResolveFailed(NsdServiceInfo serviceInfo, int errorCode) {
                    Log.e(TAG, "Resolve Failed: " + serviceInfo + "\tError Code: " + errorCode);
                    switch (errorCode) {
                        case NsdManager.FAILURE_ALREADY_ACTIVE:
                            Log.e(TAG, "FAILURE_ALREADY_ACTIVE");
                            // Just try again...
                            startResolveService(serviceInfo);
                            break;
                        case NsdManager.FAILURE_INTERNAL_ERROR:
                            Log.e(TAG, "FAILURE_INTERNAL_ERROR");
                            break;
                        case NsdManager.FAILURE_MAX_LIMIT:
                            Log.e(TAG, "FAILURE_MAX_LIMIT");
                            break;
                    }
                 }

                @Override
                public void onServiceResolved(NsdServiceInfo serviceInfo) {
                    Log.i(TAG, "Service Resolved: " + serviceInfo);
                    mLocatedServices.add(serviceInfo);
                    reportNewService();
                }
            };
            mNsdManager.resolveService(serviceInfo, newResolveListener);
        }

当几乎立即发现多个服务时,第一个服务得到解决,然后您获得FAILURE_ALREADY_ACTIVE一次或两次,然后下一个服务得到解决,依此类推.