java - 监听器已在使用中(服务发现)

Question

我无法解决一项服务，而另一项服务正在解决？如果这就是错误的含义......等待解决的方法是什么？

@Override
public void onServiceFound(NsdServiceInfo service) {
    Log.d(TAG, "Service found. " + service);
    if (service.getServiceType().equals(SERVICE_TYPE)) {
        if (service.getServiceName().contains(mServiceName)) {
            mNsdManager.resolveService(service, mResolveListener);
        }
    }
}

java.lang.IllegalArgumentException: listener already in use at android.net.nsd.NsdManager.resolveService(NsdManager.java:613) at com.example.miguel.broadcast.LocalService$2.onServiceFound(LocalService.java:145)

Answer 1

您不必等待! 如果您查看 javadocs resolveService(NsdServiceInfo serviceInfo, NsdManager.ResolveListener 监听器) here您会注意到，对于参数监听器，它说“在成功或失败时接收回调。不能为空。不能用于 Activity 服务解析。”

因此，为了使其正常工作，只需执行以下操作:

mNsdManager.resolveService(service, new MyResolveListener());

MyResolveListener 在哪里:

private class MyResolveListener implements NsdManager.ResolveListener {
        @Override
        public void onResolveFailed(NsdServiceInfo serviceInfo, int errorCode) {
            //your code
        }

        @Override
        public void onServiceResolved(NsdServiceInfo serviceInfo) {
            //your code
        }
    }

希望这会有所帮助:)