如何检查 Android 设备中存在的工作互联网？

Question

正在通过以下方法检查互联网是否存在。

public boolean isConnected(Context context) {
    ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo netinfo = cm.getActiveNetworkInfo();
    if (netinfo != null && netinfo.isConnectedOrConnecting()) {
        NetworkInfo wifi = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
        NetworkInfo mobile = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
        return (mobile != null && mobile.isConnectedOrConnecting()) || (wifi != null && wifi.isConnectedOrConnecting());
    } else
        return false;}

但是当连接到 wifi 时，没有可用的互联网，那么此方法也适用。

提前致谢，请帮帮我

Answer 1

使用 obj.isAvailable() 检查网络可用性。

您可以在这里找到更多 NetworkInfo.

Answer 2

这是检查互联网的方式：-

100% 工作代码

private AlertDialog internetDialog, gpsAlertDialog;
  public BroadcastReceiver internetConnectionReciever = new BroadcastReceiver() {

            @Override
            public void onReceive(Context context, Intent intent) {
                ConnectivityManager connectivityManager = (ConnectivityManager) context
                        .getSystemService(Context.CONNECTIVITY_SERVICE);
                NetworkInfo activeNetInfo = connectivityManager
                        .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
                NetworkInfo activeWIFIInfo = connectivityManager
                        .getNetworkInfo(connectivityManager.TYPE_WIFI);

                if (activeWIFIInfo.isConnected() || activeNetInfo.isConnected()) {
                    removeInternetDialog();
                } else {
                    if (isNetDialogShowing) {
                        return;
                    }
                    showInternetDialog();
                }
            }
        };

Answer 3

这可能对你有帮助

public boolean isConnectingToInternet(){
    ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
      if (connectivity != null) 
      {
          NetworkInfo[] info = connectivity.getAllNetworkInfo();
          if (info != null) 
              for (int i = 0; i < info.length; i++) 
                  if (info[i].getState() == NetworkInfo.State.CONNECTED)
                  {
                      return true;
                  }

      }
      return false;
}

Answer 4

试试这个：

public static boolean Check_Internet_Connectivity(Context _context)
    {
        ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (connectivity != null)
        {
            NetworkInfo[] info = connectivity.getAllNetworkInfo();
            if (info != null)
            {
                for (int i = 0; i < info.length; i++)
                    if (info[i].getState() == NetworkInfo.State.CONNECTED)
                    {
                        return true;
                    }

            }
        }
        Toast.makeText(_context, "Internet Connection is not available", Toast.LENGTH_SHORT).show();
        return false;
    }

Answer 5

Ping 任何真实主机（样本 8.8.8.8）

InetAddress.getByName("8.8.8.8").isReachable(timeOut)

Answer 6

如果你碰巧通过 webview 加载页面，你也可以检查它是否调用自定义 404 错误页面:

webView.loadUrl(urlhere);    
            webView.setWebViewClient(new WebViewClient() {
                public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                    webView.loadUrl("file:///android_asset/new404.html");

                }
            });

如何检查 Android 设备中存在的工作互联网？

How to check working internet present in Android Device?

android

android-networking