以编程方式连接到无网络的wifi

Question

我正在使用以下代码连接到没有互联网连接的WiFi网络,因为它拥有自己的网络服务器,我想连接即使没有可用的互联网连接.

WifiConfiguration wifiConfiguration = new WifiConfiguration();
wifiConfiguration.SSID = String.format("\"%s\"", scanResult.SSID);
wifiConfiguration.preSharedKey = String.format("\"%s\"", "secret");

int netId = wifiManager.addNetwork(wifiConfiguration)
wifiManager.disconnect();
wifiManager.enableNetwork(netId, true);
wifiManager.reconnect();

这适用于Android Marshmallow下面的每个设备(我使用CM13,所以它可能与CyanogenMod有关？):当我使用此代码进行连接时,Android仍然使用移动连接并用感叹号标记WiFi符号.几秒后它会显示一个通知,询问我是否要保持连接,因为网络没有互联网连接.

问题:我的应用尝试自动连接到我的网络服务器失败,因为显然没有互联网连接.当然可以等到我能够访问我的网络服务器,但它应该在没有用户交互的情况下工作.

ChromeCast 或任何其他物联网设备如何解决这个问题？我在设置ChromeCast设备时从未看到过这样的通知.

Answer 1

我通过connectivityManager.bindProcessToNetwork(network);将当前进程绑定()到连接的网络来解决这个问题.这可以防止"继续使用此网络"对话框,并允许您通过wifi与设备通信.

NetworkRequest.Builder builder;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
    builder = new NetworkRequest.Builder();
    //set the transport type do WIFI
    builder.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);

    connectivityManager.requestNetwork(builder.build(), new ConnectivityManager.NetworkCallback() {
        @Override
        public void onAvailable(Network network) {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                if (Build.VERSION.RELEASE.equalsIgnoreCase("6.0")) {
                    if (!Settings.System.canWrite(mActivity)) {
                        Intent goToSettings = new Intent(Settings.ACTION_MANAGE_WRITE_SETTINGS);
                        goToSettings.setData(Uri.parse("package:" + mActivity.getPackageName()));
                        mActivity.startActivity(goToSettings);
                    }
                }
                connectivityManager.bindProcessToNetwork(null);
                if (mSsid.contains("my_iot_device-xxxxxxxxx")) {
                    connectivityManager.bindProcessToNetwork(network);
                } else {

                }

            } else {
                //This method was deprecated in API level 23
                ConnectivityManager.setProcessDefaultNetwork(null);
                if (mSsid.contains("my_iot_device-xxxxxxxxx")) {
                    ConnectivityManager.setProcessDefaultNetwork(network);
                } else {

                }

            }
            try {
                //do a callback or something else to alert your code that it's ok to send the message through socket now
            } catch (Exception e) {
                Crashlytics.logException(e);
                e.printStackTrace();
            }
            connectivityManager.unregisterNetworkCallback(this);
        }
    });
}