Android網絡相關工具類

    public class NetworkUtils {

        // 判斷當前網絡是否可用

        public static boolean networkIsConnect(Context context) {

            ConnectivityManager conn = (ConnectivityManager) context

                    .getSystemService(Context.CONNECTIVITY_SERVICE);

            NetworkInfo info = conn.getActiveNetworkInfo();

            if (info != null && info.isConnected()) {

                return true;

            } else {

                return false;

            }

        }


    // 判斷當前連接的網絡是否是wifi，并得到連接當前Wifi的信息  
    public static boolean networkIsWifi(Context context) {  
        ConnectivityManager conn = (ConnectivityManager) context  
                .getSystemService(Context.CONNECTIVITY_SERVICE);  
        NetworkInfo info = conn.getActiveNetworkInfo();  
        if (info != null && info.isConnected()  
                && info.getType() == ConnectivityManager.TYPE_WIFI) {  
            WifiManager wifiManager = (WifiManager) context  
                    .getSystemService(Context.WIFI_SERVICE);  
            WifiInfo wifiInfo = wifiManager.getConnectionInfo();  
            Toast.makeText(context, "連接的wifi網絡的id為："+wifiInfo.getNetworkId(), Toast.LENGTH_SHORT).show();  
            return true;  
        } else {  
            return false;  
        }  
    }  

    // 是否打開Wifi  
    public static void setWifiEnabled(Context context, boolean enabled) {  
        WifiManager wifiManager = (WifiManager) context  
                .getSystemService(Context.WIFI_SERVICE);  
        if (enabled) {  
            wifiManager.setWifiEnabled(true);  
        } else {  
            wifiManager.setWifiEnabled(false);  
        }  
    }  

}  </pre>