如何确定的Andr​​oid上网吗？ [英] How to determine Android internet connection?

问题描述

我如何能够确定当前可用的网络连接类型的Andr​​oid设备？例如有它返回的WiFi，3G，没有。

How can I determine the current internet connection type available to an Android device? e.g. have it return WiFi, 3G, none.

推荐答案

您可以用它来确定您是否连接：

You can use this to determine whether you are connected:

final ConnectivityManager connectManager = (ConnectivityManager)ctx.getSystemService(Context.CONNECTIVITY_SERVICE); // ctx stands for the Context
final NetworkInfo mobile = connectManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
final NetworkInfo wifi   = connectManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI  );

// Return true if connected, either in 3G or wi-fi
return ((mobile != null && mobile.getState() == NetworkInfo.State.CONNECTED) || 
        (wifi   != null && wifi.getState()   == NetworkInfo.State.CONNECTED)   );
}

这code要求的权限 ACCESS_NETWORK_STATE 和 ACCESS_WIFI_STATE 。

This code requires the permissions ACCESS_NETWORK_STATE and ACCESS_WIFI_STATE.

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