Android WifiManager.addNetwork() 返回 -1 [英] Android WifiManager.addNetwork() returns -1

问题描述

我正在编写一个 android 应用程序，它将连接到特定的 WPA 接入点，连接时，它将发出 http 调用.它不会保存网络配置.我已经阅读了几乎所有关于连接到 wifi 网络的堆栈溢出的帖子，但找不到适合我的答案.这是我用来连接的代码..

I am writing an android app which will connect to a specific WPA access point, when connected, it will issue a http call. It will not save the network config. I have read almost every post on stack overflow on connecting to wifi network but can't find the answer which works for me. Here is the code I am using to connect..

    WifiConfiguration wc = new WifiConfiguration();
    wc.allowedAuthAlgorithms.clear();
    wc.allowedGroupCiphers.clear();
    wc.allowedPairwiseCiphers.clear();
    wc.allowedProtocols.clear();
    wc.allowedKeyManagement.clear();
    wc.SSID = """.concat("<ssid>").concat(""");
    wc.preSharedKey = """.concat("<password>").concat(""");
    wc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
    wc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
    wc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
    wc.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
    wc.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
    wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
    wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
    wc.allowedProtocols.set(WifiConfiguration.Protocol.RSN); // For WPA2
    wc.allowedProtocols.set(WifiConfiguration.Protocol.WPA); // For WPA
    wc.priority = 0;
    //wc.hiddenSSID = true;
    wc.status = WifiConfiguration.Status.ENABLED;
    // connect to and enable the connection
    WifiManager wifiManager = (WifiManager) getSystemService(this.WIFI_SERVICE);
    int netId = wifiManager.addNetwork(wc);
    boolean wifiEnabled = wifiManager.enableNetwork(netId, true);
    wifiManager.setWifiEnabled(true);
    Log.d("opener", "addNetwork returned " + netId);
    if (netId > 0) {
        wifiId = netId;
    }

然而，netId 始终为 -1.我在两款不同的手机(ICS:HTC Rezound 和 GingerBread:Motorola DroidX)上尝试过.两者都显示完全相同的结果.我做错了什么?

However netId is always -1. I have tried it on two different phones (ICS:HTC Rezound and GingerBread:Motorola DroidX). Both show exactly same results. What am I doing wrong?

我用 WPA2 接入点尝试了相同的代码，但得到了非常奇怪的结果.当这段代码运行时，第一次它会返回-1，但如果我第二次调用相同的方法延迟 1 秒，它会返回有效的 netId.所以问题是

I tried same code with WPA2 access point and got very weird results. When this code was run, first time it would return -1, but if I call same method second time with a delay of 1 second, it would return valid netId. So the questions are

1. 为什么上面的代码没有连接到 wpa ?
2. 在 wpa2 中，为什么我需要调用上述方法两次才能连接?我观察到我必须多次连接才能连接.有时需要3-4次才能连接.所以现在我正在循环，直到添加配置返回 >0 id.

推荐答案

可能有点晚了但是试试这个连接到 Open/WPA/WPA2/WEP 安全网络

Possibly a bit late but try this to connect to Open/WPA/WPA2/WEP secured networks

    WifiConfiguration wifiConfig = new WifiConfiguration();
    wifiConfig.SSID = selectedNetwork.SSID();
    wifiConfig.status = WifiConfiguration.Status.DISABLED;
    wifiConfig.priority = 40;

    // Dependent on the security type of the selected network
    // we set the security settings for the configuration
    if (/*Open network*/) {
        // No security
        wifiConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
        wifiConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
        wifiConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
        wifiConfig.allowedAuthAlgorithms.clear();
        wifiConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
        wifiConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
    } else if (/*WPA*/ || /*WPA2*/) {
        //WPA/WPA2 Security
        wifiConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
        wifiConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
        wifiConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
        wifiConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
        wifiConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);
        wifiConfig.preSharedKey = """.concat(password).concat(""");
    } else if (/*WEP*/) {
        // WEP Security
        wifiConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
        wifiConfig.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
        wifiConfig.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
        wifiConfig.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN);
        wifiConfig.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED);
        wifiConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
        wifiConfig.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
        wifiConfig.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);

        if (getHexKey(password)) wifiConfig.wepKeys[0] = password;
        else wifiConfig.wepKeys[0] = """.concat(password).concat(""");
        wifiConfig.wepTxKeyIndex = 0;
    }

    // Finally we add the new configuration to the managed list of networks
    int networkID = wifiMan.addNetwork(wifiConfig);

显然，根据适用情况为不同的安全类型设置您自己的变量.连接到 WEP 安全网络的关键(请原谅双关语)是 getHexKey 方法，如下所示.

Obviously set your own variables for the different security types as applicable. The key (pardon the pun) to connecting to a WEP secured network is the getHexKey method as below.

/**
 * WEP has two kinds of password, a hex value that specifies the key or
 * a character string used to generate the real hex. This checks what kind of
 * password has been supplied. The checks correspond to WEP40, WEP104 & WEP232
 * @param s
 * @return
 */
private static boolean getHexKey(String s) {
    if (s == null) {
        return false;
    }

    int len = s.length();
    if (len != 10 && len != 26 && len != 58) {
        return false;
    }

    for (int i = 0; i < len; ++i) {
        char c = s.charAt(i);
        if ((c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')) {
            continue;
        }
        return false;
    }
    return true;
}

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