我试图检查设备是否已连接到互联网。我有以下实现来做到这一点
public static boolean isConnectedToNetwork(Context context) {
ConnectivityManager connectivityManager =
(ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}
NetworkInfo提供了两种方法isConnected()和isAvailable()。我应该使用哪一个，它们之间有什么区别。
有没有办法在没有互联网连接的情况下检测设备连接到Wifi的状态？
答案 0 :(得分：3)
如果设备连接到网络，则isConnected返回true。 如果设备未连接但网络可用于连接，则isAvailable返回true，isConnected返回false。
您可以阅读此主题以查找最后一个问题。 Android Check if there is WiFi but no internet
答案 1 :(得分：0)
isConnected()
Indicates whether network connectivity exists and it is possible to establish connections and pass data.
- Always call this before attempting to perform data transactions.
isAvailable()
Indicates whether network connectivity is possible. A network is unavailable when a persistent or semi-persistent condition prevents the possibility of connecting to that network. Examples include
- The device is out of the coverage area for any network of this type.
- The device is on a network other than the home network (i.e., roaming), and data roaming has been disabled.
- The device's radio is turned off, e.g., because airplane mode is enabled.