public class NetWorkUtil
{
    /** 
     * 没有连接网络 
     */  
    private static final int NETWORK_NONE = -1;  
    /** 
     * 移动网络 
     */  
    private static final int NETWORK_MOBILE = 0;  
    /** 
     * WIFI
     */  
    private static final int NETWORK_WIFI = 1;  

    /**
     * 获取网络连接状态
     *
     * @param context
     *
     * @return  -1: 无网络连接
     *            0: 数据网络
     *            1: WiFi网络
     */
    public static int getNetWorkState(Context context)
    {
        // 得到连接管理器对象  
        ConnectivityManager connectivityManager = (ConnectivityManager) context
                .getSystemService(Context.CONNECTIVITY_SERVICE);  
  
        NetworkInfo activeNetworkInfo = connectivityManager
                .getActiveNetworkInfo();  
        if (activeNetworkInfo != null && activeNetworkInfo.isConnected())
        {
            if (activeNetworkInfo.getType() == (ConnectivityManager.TYPE_WIFI))
            {
                return NETWORK_WIFI;  
            }
            else if (activeNetworkInfo.getType() == (ConnectivityManager.TYPE_MOBILE))
            {
                return NETWORK_MOBILE;  
            }  
        }
        else
        {
            return NETWORK_NONE;  
        }  
        return NETWORK_NONE;  
    }
}