Java 如何在Android Q中检查互联网连接？

在Android Q之前，您所要做的就是使用NetworkUtils类。但是这个类在API 29中被弃用了。 我一直在寻找替代方案，但似乎找不到

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那么，如何在Android Q中检查互联网连接？

使用此代码片段。

     @IntRange(from = 0, to = 3)
public static int getConnectionType(Context context) {
    int result = 0; // Returns connection type. 0: none; 1: mobile data; 2: wifi
    ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (cm != null) {
            NetworkCapabilities capabilities = cm.getNetworkCapabilities(cm.getActiveNetwork());
            if (capabilities != null) {
                if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
                    result = 2;
                } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
                    result = 1;
                } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) {
                    result = 3;
                }
            }
        }
    } else {
        if (cm != null) {
            NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
            if (activeNetwork != null) {
                // connected to the internet
                if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
                    result = 2;
                } else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
                    result = 1;
                } else if (activeNetwork.getType() == ConnectivityManager.TYPE_VPN) {
                    result = 3;
                }
            }
        }
    }
    return result;
}

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快乐编码：）

使用此代码片段。

     @IntRange(from = 0, to = 3)
public static int getConnectionType(Context context) {
    int result = 0; // Returns connection type. 0: none; 1: mobile data; 2: wifi
    ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (cm != null) {
            NetworkCapabilities capabilities = cm.getNetworkCapabilities(cm.getActiveNetwork());
            if (capabilities != null) {
                if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {
                    result = 2;
                } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
                    result = 1;
                } else if (capabilities.hasTransport(NetworkCapabilities.TRANSPORT_VPN)) {
                    result = 3;
                }
            }
        }
    } else {
        if (cm != null) {
            NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
            if (activeNetwork != null) {
                // connected to the internet
                if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI) {
                    result = 2;
                } else if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
                    result = 1;
                } else if (activeNetwork.getType() == ConnectivityManager.TYPE_VPN) {
                    result = 3;
                }
            }
        }
    }
    return result;
}

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快乐编码：）

如果您正在寻找一个简单的代码，您可以使用：

public static boolean isConnected(Context getApplicationContext) {
    boolean status = false;

    ConnectivityManager cm = (ConnectivityManager) getApplicationContext.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (cm != null && cm.getActiveNetwork() != null && cm.getNetworkCapabilities(cm.getActiveNetwork()) != null) {
            // connected to the internet
            status = true;
        }
    } else {
        if (cm != null && cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnectedOrConnecting()) {
            // connected to the internet
            status = true;
        }
    }


    return status;
}

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如果您正在寻找一个简单的代码，可以使用：

public static boolean isConnected(Context getApplicationContext) {
    boolean status = false;

    ConnectivityManager cm = (ConnectivityManager) getApplicationContext.getSystemService(Context.CONNECTIVITY_SERVICE);
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
        if (cm != null && cm.getActiveNetwork() != null && cm.getNetworkCapabilities(cm.getActiveNetwork()) != null) {
            // connected to the internet
            status = true;
        }
    } else {
        if (cm != null && cm.getActiveNetworkInfo() != null && cm.getActiveNetworkInfo().isConnectedOrConnecting()) {
            // connected to the internet
            status = true;
        }
    }


    return status;
}

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ConnectionManager只检查智能手机理论上是否可以建立互联网连接。互联网连接是否确实存在（例如，如果网络质量非常差），只能通过ping或网址来确定。

ConnectionManager仅检查智能手机理论上是否可以建立互联网连接。互联网连接是否确实存在，例如，如果网络质量非常差，只能通过ping或网址来确定。

这就是我检查API级别的原因仔细查看代码@Remy这就是我检查API级别仔细查看代码@Remy的原因