java - isNetworkConnected() Android Pie 9.0 的问题

问题描述

我正在使用此代码来检查网络是否已连接。它在最高8.1的所有 Android 版本上都能完美运行，但自从 Android Pie 以来，它总是显示我没有连接！

private boolean isNetworkAvailable() {
        final ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
        final NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();

        if (networkInfo == null || !networkInfo.isConnected()) {
            onUpdateNetworkStatus(false);
            return false;
        }

        final Thread thread = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    final URL url = new URL("http://clients3.google.com/generate_204");
                    final HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
                    httpURLConnection.setRequestProperty("User-Agent", "Android");
                    httpURLConnection.setRequestProperty("Connection", "close");
                    httpURLConnection.setConnectTimeout(1500);
                    httpURLConnection.connect();
                    onUpdateNetworkStatus(httpURLConnection.getResponseCode() == 204 && httpURLConnection.getContentLength() == 0);
                } catch (Exception e) {
                    onUpdateNetworkStatus(false);
                }
            }
        });

        thread.start();

        return true;
    }

标签： javaandroid

java - isNetworkConnected() Android Pie 9.0 的问题

问题描述

解决方案

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