如何在没有 Networkinfo(Java) 的情况下检查互联网

Question

由于 NetworkInfo 已弃用，我无法找到任何替代解决方案。
我试过 ConnectivityManager.NetworkCallbacks 但在这个 OnNetworkUnavailable 中不起作用。

单击按钮时如何检查互联网？

Answer 1

private boolean isNetworkConnected() {
       ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
       return cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnected();
   }

Answer 2

在清单中添加此权限

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

然后使用下面的方法

public boolean isOnline() {

    boolean isConnected = false;
    ConnectivityManager connectivityMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) {
        // Checking internet connectivity
        NetworkInfo activeNetwork = null;
        if (connectivityMgr != null) {
            activeNetwork = connectivityMgr.getActiveNetworkInfo(); // Deprecated in API 29
        }
        isConnected = activeNetwork != null;

    } else {
        Network[] allNetworks = connectivityMgr.getAllNetworks(); // added in API 21 (Lollipop)

        for (Network network : allNetworks) {
            NetworkCapabilities networkCapabilities = connectivityMgr.getNetworkCapabilities(network);
            if (networkCapabilities != null) {
                if (networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)
                        || networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)
                        || networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_ETHERNET))
                    isConnected = true;
            }
        }
    }

    return isConnected;

}

Answer 3

fun hasActiveInternetConnection(): Boolean {
try {
    val urlc: HttpURLConnection =
        URL("http://www.google.com").openConnection() as HttpURLConnection
    urlc.setRequestProperty("User-Agent", "Test")
    urlc.setRequestProperty("Connection", "close")
    urlc.connectTimeout = 1500
    urlc.connect()
    return urlc.responseCode == 200
} catch (e: Exception) {

}
return false
}

此方法return活动互联网连接不仅刚刚连接！

在java

Boolean hasActiveInternetConnection() {
    try {
        HttpURLConnection urlc = (HttpURLConnection) (new URL("http://www.google.com").openConnection());
        urlc.setRequestProperty("User-Agent", "Test");
        urlc.setRequestProperty("Connection", "close");
        urlc.setConnectTimeout(1500);
        urlc.connect();
        return (urlc.getResponseCode() == 200);
    } catch (IOException e) {

        return false;
    }
}

如何在没有 Networkinfo(Java) 的情况下检查互联网

How to check internet without Networkinfo(Java)

android

android-studio

callback

android-networking

internet-connection