android中判断网络连接是否可用

一、判断网络连接是否可用（返回true表示网络可用，false为不可用）

 public static boolean checkNetworkAvailable(Context context) {
         ConnectivityManager connectivity = (ConnectivityManager) context
                 .getSystemService(Context.CONNECTIVITY_SERVICE);
         if (connectivity == null) {
             return false;
         } else {
             NetworkInfo[] info = connectivity.getAllNetworkInfo();
             if (info != null) {
                 for (int i = 0; i < info.length; i++) {
                     if (info[i].getState() == NetworkInfo.State.CONNECTED) {
                         NetworkInfo netWorkInfo = info[i];
                         if (netWorkInfo.getType() == ConnectivityManager.TYPE_WIFI) {
                             return true;
                         } else if (netWorkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
                             return true;
                         }
                     }
                 }
             }
         }
         return false;
     }

二、判断GPS是否打开

 public static boolean isGpsEnabled(Context context) {
         LocationManager lm = ((LocationManager) context
                 .getSystemService(Context.LOCATION_SERVICE));
         List<String> accessibleProviders = lm.getProviders(true);
         return accessibleProviders != null && accessibleProviders.size() > 0;
     } 

三、判断WIFI是否打开

 public static boolean isWifiEnabled(Context context) {
         ConnectivityManager mgrConn = (ConnectivityManager) context
                 .getSystemService(Context.CONNECTIVITY_SERVICE);
         TelephonyManager mgrTel = (TelephonyManager) context
                 .getSystemService(Context.TELEPHONY_SERVICE);
         return ((mgrConn.getActiveNetworkInfo() != null && mgrConn
                 .getActiveNetworkInfo().getState() == NetworkInfo.State.CONNECTED) || mgrTel
                 .getNetworkType() == TelephonyManager.NETWORK_TYPE_UMTS);
     } 

四、判断是否是3G网络

 public static boolean is3rd(Context context) {
         ConnectivityManager cm = (ConnectivityManager) context
                 .getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo networkINfo = cm.getActiveNetworkInfo();
         if (networkINfo != null
                 && networkINfo.getType() == ConnectivityManager.TYPE_MOBILE) {
             return true;
         }
         return false;
     }  

五、判断是wifi还是3g网络,用户的体现性在这里了，wifi就可以建议下载或者在线播放。

 public static boolean isWifi(Context context) {
             ConnectivityManager cm = (ConnectivityManager) context
                     .getSystemService(Context.CONNECTIVITY_SERVICE);
             NetworkInfo networkINfo = cm.getActiveNetworkInfo();
             if (networkINfo != null
                     && networkINfo.getType() == ConnectivityManager.TYPE_WIFI) {
                 return true;
             }
             return false;
         }