Lollipop Bad WiFi连接和Fallback to Mobile Network，如何切换到WiFi？

Question

汤姆， 我有类似的问题，但你不能解决它你和其他人推荐的方式。我的onAvailable回调永远不会打不到互联网连接的WiFi。这是我的代码     @TargetApi（21）     public static void connectToWifiNetworkSynchronousApi21（final WifiConfiguration wifiConfig）{         NetworkRequest.Builder builder = new NetworkRequest.Builder（）;

    builder.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
    builder.removeCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);

    builder.setNetworkSpecifier(wifiConfig.SSID);
    NetworkRequest request = builder.build();

    ConnectivityManager cm = (ConnectivityManager)App.getApp().getSystemService(Context.CONNECTIVITY_SERVICE);
    cm.requestNetwork(request,new ConnectivityManager.NetworkCallback() {

        @Override
        public void onAvailable(Network network) {
            // TODO Auto-generated method stub
            LOG.debug("onAvailable:{} requested {}", network.toString(), wifiConfig.networkId);
            super.onAvailable(network);
        }

        @Override
        public void onLosing(Network network, int maxMsToLive) {
            // TODO Auto-generated method stub
            super.onLosing(network, maxMsToLive);
        }

        @Override
        public void onLost(Network network) {
            // TODO Auto-generated method stub
            super.onLost(network);
        }

        @Override
        public void onCapabilitiesChanged(Network network,
                NetworkCapabilities networkCapabilities) {
            // TODO Auto-generated method stub
            super.onCapabilitiesChanged(network, networkCapabilities);
        }

        @Override
        public void onLinkPropertiesChanged(Network network,
                LinkProperties linkProperties) {
            // TODO Auto-generated method stub
            super.onLinkPropertiesChanged(network, linkProperties);
        }

    }); 
}