如何让在目前的Andr​​oid WiFi连接信息 [英] how to get current wifi connection info in android

问题描述

我试图找到，如果 scanResult 是当前连接wifi网络。

I'm trying to find if scanResult is the current connected wifi network.

这是我的code

public boolean IsCurrentConnectedWifi(ScanResult scanResult) 
{
    WifiManager mainWifi = (WifiManager) getSystemService(Context.WIFI_SERVICE);
    WifiInfo currentWifi = mainWifi.getConnectionInfo();
    if(currentWifi != null)
    {
        if(currentWifi.getSSID() != null) 
        {
            if(currentWifi.getSSID() == scanResult.SSID)
            return true;
        }
    }  
    return false;
}

我对得到scanresult没有问题。

I have no problem on getting scanresult.

总是我收到currentWifi为空。

Always I'm getting currentWifi is null.

我在哪里错了，还是有其他方法来做到这一点？

Where am I wrong or Is there any alternative method to do this?

推荐答案

最可能的是，你已经找到答案：currentWifi.getSSID（）被引用在大多数情况下，scanResult.SSID没有（当然你不能使用= =对字符串：））

Most probably you have already found answer: currentWifi.getSSID() is quoted in most cases where scanResult.SSID is not (and of course you must not use == on strings :)).

尝试这样的事情，它返回当前的SSID或空：

Try something like this, it returns current SSID or null:

public static String getCurrentSsid(Context context) {
  String ssid = null;
  ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
  if (networkInfo.isConnected()) {
    final WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
    if (connectionInfo != null && !StringUtil.isBlank(connectionInfo.getSSID())) {
      ssid = connectionInfo.getSSID();
    }
  }
  return ssid;
}

也是必需的权限：

also permissions are required:

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

StringUtil不是一个标准的Andr​​oid类，这样你就可以使用文本实用程序来代替。在code，那么看起来像这样

StringUtil is not a standard Android class, so you can use TextUtils instead. The code then looks like this

public static String getCurrentSsid(Context context) {
  String ssid = null;
  ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
  NetworkInfo networkInfo = connManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
  if (networkInfo.isConnected()) {
    final WifiManager wifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
    final WifiInfo connectionInfo = wifiManager.getConnectionInfo();
    if (connectionInfo != null && !TextUtils.isEmpty(connectionInfo.getSSID())) {
      ssid = connectionInfo.getSSID();
    }
  }
  return ssid;
}

这篇关于如何让在目前的Andr​​oid WiFi连接信息的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！