我通过再次调用resolveService 解决了这个问题。它可能会连续失败几次,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);
}
}
我没有从 onServiceFound 中调用resolveService,而是调用它的单独声明:
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);
}
当几乎同时发现多个服务时,第一个服务得到解决,然后您会再获得 FAILURE_ALREADY_ACTIVE 一两次,然后下一个服务得到解决,依此类推。