如何知道Android是否连接到WiFi或以太网？

Question

如何知道我是否已连接到 Android 中的 WiFi 或以太网？在 Android 操作系统中，这会收到有关图标的通知

是否存在以编程方式了解它的方法？

Answer 1

http://developer.android.com/training/basics/network-ops/managing.html

ConnectivityManager cm = (ConnectivityManager) getActivity().
            getSystemService(context.CONNECTIVITY_SERVICE);

然后你使用：

cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_ETHERNET

或者：

cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI

检查它是否在 Wifi 或以太网上。

希望有所帮助。

Answer 2

这够了吗？

ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo Wifi = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
if (Wifi.isConnected()) { return true; }

此外，要获取 wifi 详细信息：

WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiInfo wifiInfo = wifiManager.getConnectionInfo();
return wifiInfo.getSSID()

Answer 3

谢谢大家

只是为了避免异常（无网络情况）。我分享我测试过的代码。

private Boolean isNetworkAvailable() {
    ConnectivityManager connectivityManager 
          = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
    return activeNetworkInfo != null && activeNetworkInfo.isConnectedOrConnecting();
}

public Boolean isWifiConnected(){
    if(isNetworkAvailable()){
        ConnectivityManager cm 
        = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        return (cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_WIFI);
    }
    return false;
}

public Boolean isEthernetConnected(){
    if(isNetworkAvailable()){
        ConnectivityManager cm 
        = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        return (cm.getActiveNetworkInfo().getType() == ConnectivityManager.TYPE_ETHERNET);
    }
    return false;
}