android - ConnectivityManager.requestNetwork() 未按预期工作

Question

我正在尝试暂时强制设备使用移动数据。我正在使用ConnectivityManager.requestNetwork()，

    NetworkRequest.Builder request = new NetworkRequest.Builder();
    request.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
    request.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR);

    connectivityManager.requestNetwork(request.build(), newRequestTransportCallback(connectivityManager),
            (int) TimeUnit.SECONDS.toMillis(10));

newRequestTransportCallback()归来的地方，

new ConnectivityManager.NetworkCallback() {
            @Override
            public void onAvailable(Network network) {
                Log.d(TAG,"Network available: " + network + ", binding...");
                if (cm.bindProcessToNetwork(network)) {
                    Log.d(TAG,"Bind successful to network: " + network);
                } else {
                    Log.w(TAG,"Bind failed to network: " + network);
                }
            }

            @Override
            public void onUnavailable() {
                Log.w(TAG,"Network not available");
            }
        };

我可以从我的日志语句中看到请求和绑定成功。但是，当我随后调用ConnectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE)它时，它告诉我网络已断开连接（并且我尝试轮询以查看更新网络信息是否存在延迟但也没有成功）。