android - 查询 ConnectivityManager getActiveNetwork

Question

需要知道getActiveNetwork返回什么样的值。我使用的代码是:

    ConnectivityManager connectivityManager =  (ConnectivityManager)context.getSystemService(Context.CONNECTIVITY_SERVICE);    
    Network network = connectivityManager.getActiveNetwork(); 
    Log.e(TAG,"Network : " + network.toString());

输出返回数字，这个数字到底意味着什么？

Answer 1

很好，许多人提到在 6.0 SDK 版本之前不推荐使用 connectivityManager.activeNetworkInfo.type 或 connectivityManager.activeNetworkInfo.typeName。

我遇到过类似的情况，必须同时支持最低 5.0 和 >= 6.0 的设备。这对我有用。

if (SDK_INT >= M) {
        connectivityManager.activeNetwork
                ?.let { connectivityManager.getNetworkCapabilities(it) }
                ?.takeIf { it.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) }
                ?.takeIf { connectivityManager.activeNetworkInfo.isConnected }
                ?.let { return "Wifi is Connected" 
                     //Just to make a point. Better be a sealed class.
                }
    } else {
        connectivityManager.activeNetworkInfo
                ?.takeIf { it.isConnected && it.type == ConnectivityManager.TYPE_WIFI }
                ?.let { return "Wifi is Connected" }
    }

 return "Wifi is Disconnected"