如何检查手机上是否启用了 WiFi

Question

我正在尝试使用 java 和 xml 开发一个 android 应用程序，我想要一些关于如何确定是否在应用程序打开的手机上启用了 wifi 的指导。任何帮助，将不胜感激。我尝试过使用这些方法，但它们都无法检测到我的 wifi 端口是否正确打开或关闭。恐怕这些方法已经过时了。有人有最新的方法吗？

//determine if wifi is enabled
    //1st try
    wifi =Settings.Secure.getInt(cr, Settings.Secure.WIFI_ON);

    //second try
    wifi=Settings.Global.getInt(cr, Settings.Global.WIFI_ON, 0);

    //3rd try
    WifiManager wifi = (WifiManager)getSystemService(Context.WIFI_SERVICE);
    if (wifi.isWifiEnabled()){
        //wifi is enabled
        wifiInt=1;
    }
    else
        wifiInt=0;

Answer 1

可以通过获取WiFi系统服务的实例来检查WiFi的状态，如下所示：

WifiManager wifi = (WifiManager)getSystemService(Context.WIFI_SERVICE);

由此，isWifiEnabled() 方法可用于确定是否启用了 WiFi。如下：

WifiManager wifi = (WifiManager)getSystemService(Context.WIFI_SERVICE);
if (wifi.isWifiEnabled()){
    //TODO: Code to execute if wifi is enabled.
}

Answer 2

你可以通过这种方式查看 WiFi 和移动数据。

ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

NetworkInfo mWifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
NetworkInfo mData = connManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

if(mWifi.isConnected()||mData.isConnected()){
    //Do something when data is available
}

检查任何活动的网络连接：

private boolean isNetworkAvailable() {

        //Call this method to check network connection.

        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
        return activeNetworkInfo != null && activeNetworkInfo.isConnected();

    }

Answer 3

您也可以尝试获取 wifi connected wifi name

WifiManager wifiManager = (WifiManager)HomeScreen.this.getSystemService(Context.WIFI_SERVICE);
            if(wifiManager != null) 
            {
                if(wifiManager.isWifiEnabled())
                {
                    WifiInfo connectedWifiInfo = wifiManager.getConnectionInfo();
                    if(connectedWifiInfo != null)
                    {
                        if(connectedWifiInfo.getBSSID() != null)
                        {   
                            // connected
                        }
                        else
                        {
                            // not connected
                        }
                    }
                    else
                    {
                        // not connected
                    }
                }
                else
                {
                    // not connected
                }
            }