Android网络类型判断

在Android开发中，我们有时候需要根据当前网络的类型去做一些操作，下面看看如何判断当前网络的状况：

public class NetWorkUtil {
    private static ConnectivityManager manager;
    /**
     * 判断网络是否连接
     * @param context
     * @return
     */
    public static boolean isNetWorkAvailable(Context context){
        boolean flag = false;
        manager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if(manager.getActiveNetworkInfo()!=null){
            flag =  manager.getActiveNetworkInfo().isAvailable();
        }
        return flag;
    }
    /**
     * 判断当前网络类型
     * @param context
     * @return 1 代表gps,2代表wifi
     */
    public static int getNetworkType(Context context){  
        int type = 0 ;
        State gprs = manager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE).getState();  
        State wifi = manager.getNetworkInfo(ConnectivityManager.TYPE_WIFI).getState();  
        if(gprs == State.CONNECTED || gprs == State.CONNECTING){  
            type = 1;
        }  
        if(wifi == State.CONNECTED || wifi == State.CONNECTING){  
            type = 2;
        }  
          return type;
    }  
    /**
     * 判断移动网络是否连接
     * @param context
     * @return
     * @throws Exception
     */
     public static boolean isMobileDataEnable(Context context)  {  
            ConnectivityManager connectivityManager = (ConnectivityManager) context  
                    .getSystemService(Context.CONNECTIVITY_SERVICE);  
            boolean isMobileDataEnable = false;  

            isMobileDataEnable = connectivityManager.getNetworkInfo(  
                    ConnectivityManager.TYPE_MOBILE).isConnectedOrConnecting();  

            return isMobileDataEnable;  
        }  
      /**
       * 判断wifi是否连接
       * @param context
       * @return
       * @throws Exception
       */
        public static boolean isWifiDataEnable(Context context)  {  
            ConnectivityManager connectivityManager = (ConnectivityManager) context  
                    .getSystemService(Context.CONNECTIVITY_SERVICE);  
            boolean isWifiDataEnable = false;  
            isWifiDataEnable = connectivityManager.getNetworkInfo(  
                    ConnectivityManager.TYPE_WIFI).isConnectedOrConnecting();  
            return isWifiDataEnable;  
    }  
}