Question

我正在开发一个Android应用程序，在我的应用程序中，我想检查网络连接，就像我想检查wifi和3G中的网络连接（如印度人大多喜欢移动中的数据计划），如何检查网络中的wifi和3G.naybody知道，请对此有所了解。

由于

Answer 1

请试试这个

public static boolean isInternetConnected (Context ctx) {
    ConnectivityManager connectivityMgr = (ConnectivityManager) ctx
            .getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo wifi = connectivityMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
    NetworkInfo mobile = connectivityMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
    // Check if wifi or mobile network is available or not. If any of them is
    // available or connected then it will return true, otherwise false;
    if (wifi != null) {
        if (wifi.isConnected()) {
            return true;
        }
    }
    if (mobile != null) {
        if (mobile.isConnected()) {
            return true;
        }
    }
    return false;
}

请在android清单文件中添加以下权限。

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

Answer 2

这是代码段。如果网络启用则返回true，否则返回false

private boolean netCheckin() {
    try {
        ConnectivityManager nInfo = (ConnectivityManager) getSystemService(
            Context.CONNECTIVITY_SERVICE);
        nInfo.getActiveNetworkInfo().isConnectedOrConnecting();
        Log.d(tag, "Net avail:"
            + nInfo.getActiveNetworkInfo().isConnectedOrConnecting());
        ConnectivityManager cm = (ConnectivityManager) getSystemService(
            Context.CONNECTIVITY_SERVICE);
        NetworkInfo netInfo = cm.getActiveNetworkInfo();
        if (netInfo != null && netInfo.isConnectedOrConnecting()) {
            Log.d(tag, "Network available:true");
            return true;
        } else {
            Log.d(tag, "Network available:false");
            return false;
        }
    } catch (Exception e) {
        return false;
    }
}

Answer 3

您可以使用以下代码，这适用于所有API版本：

ConnectivityManager cm =
                (ConnectivityManager)mContext.getSystemService(Context.CONNECTIVITY_SERVICE);

        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
        boolean isConnected = activeNetwork != null &&
                              activeNetwork.isConnectedOrConnecting();

    if(isConnected)
    {
    if(activeNetwork.getType()==ConnectivityManager.TYPE_MOBILE)
    return true;    

    else
        return false;
    }

    else
        return false;

Answer 4

我在Activity类

中使用这个

private boolean isConnectedToInternet() {
  ConnectivityManager connectivityManager = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo networkInfo = connectivityManager.getActiveNetworkInfo();
  return (networkInfo != null);
}

如何在移动设备中检查WIFI和3G（数据计划）中的网络连接启用或禁用？

4 个答案: