WifiConfiguration 在 Lollipop 中启用网络

Question

我正在做 Wifi 项目，有一个模块可以让用户以编程方式加入 wifi。

在 kitkat 及以下版本中可以成功运行，但在 Lollipop 中则无法正常运行。

代码如下：

WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
WifiConfiguration wifiConfiguration = new WifiConfiguration();
wifiConfiguration.SSID = "\"testSSID\"";
wifiConfiguration.hiddenSSID = true;
wifiConfiguration.status = WifiConfiguration.Status.ENABLED;
wifiConfiguration.allowedKeyManagement
.set(WifiConfiguration.KeyMgmt.NONE);
netId = wifiManager.addNetwork(wifiConfiguration);
Log.d("WifiPreference", "add Network returned " + netId);
boolean checkEnableWifi = wifiManager.enableNetwork(netId, true);
Log.d("WifiPreference", "enableNetwork returned " + checkEnableWifi);

我测试的设备是 nexus 5 内部版本号 LRX21O，我的代码中是否有问题或 Lollipop 上的错误？

Answer 1

我在 Nexus 7 上连接到 hp 打印机时遇到了一种情况，其中方法 enablenetwork(id,true) 返回 true 但仍然无法连接。 @Santosh 和 @Seraphim 的回答帮助了我..禁用每个网络并仅启用所需的 SSID 有效。

Answer 2

试试这个。不要禁用其他已保存的网络。因为当您选择的网络不可用时，它将阻碍 wifi 在其他网络上的回退。玩优先。

/*
 *  Max priority of network to be associated.
 */
private static final int MAX_PRIORITY = 999999;

/**
 * Allow a previously configured network to be associated with.
 */
public boolean enableNetwork(String ssid) {
    boolean state = false;
    List<WifiConfiguration> list = wifiManager.getConfiguredNetworks();

    if(list != null && list.size() > 0) {
        for( WifiConfiguration i : list ) {
            if(i.SSID != null && i.SSID.equals(convertToQuotedString(ssid))) {

                wifiManager.disconnect();

                int newPri = getMaxPriority() + 1;
                if(newPri >= MAX_PRIORITY) {
                    // We have reached a rare situation.
                    newPri = shiftPriorityAndSave();
                }

                i.priority = newPri;
                wifiManager.updateNetwork(i);
                wifiManager.saveConfiguration();

                state = wifiManager.enableNetwork(i.networkId, true);
                wifiManager.reconnect();
                break;
            }
        }
    }

    return state;
}

private int getMaxPriority() {
    final List<WifiConfiguration> configurations = wifiManager.getConfiguredNetworks();
    int pri = 0;
    for (final WifiConfiguration config : configurations) {
        if (config.priority > pri) {
            pri = config.priority;
        }
    }
    return pri;
}

private void sortByPriority(final List<WifiConfiguration> configurations) {
    Collections.sort(configurations,
        new Comparator<WifiConfiguration>() {
            @Override
            public int compare(WifiConfiguration object1, WifiConfiguration object2) {
                return object1.priority - object2.priority;
            }
        });
}

private int shiftPriorityAndSave() {
    final List<WifiConfiguration> configurations = wifiManager.getConfiguredNetworks();
    sortByPriority(configurations);
    final int size = configurations.size();
    for (int i = 0; i < size; i++) {
        final WifiConfiguration config = configurations.get(i);
        config.priority = i;
        wifiManager.updateNetwork(config);
    }
    wifiManager.saveConfiguration();
    return size;
}

/**
 * Add quotes to string if not already present.
 *
 * @param string
 * @return
 */
public static String convertToQuotedString(String string) {
    if (TextUtils.isEmpty(string)) {
        return "";
    }

    final int lastPos = string.length() - 1;
    if (lastPos > 0
            && (string.charAt(0) == '"' && string.charAt(lastPos) == '"')) {
        return string;
    }

    return "\"" + string + "\"";
}

Answer 3

在棒棒糖上遇到类似问题。

手动禁用其他网络，然后重新连接 wifi 管理器解决了这个问题。

boolean enableNework(String ssid, Context cxt) {
    boolean state = false;
    WifiManager wm = (WifiManager) cxt.getSystemService(Context.WIFI_SERVICE);
    if (wm.setWifiEnabled(true)) {
        List<WifiConfiguration> networks = wm.getConfiguredNetworks();
        Iterator<WifiConfiguration> iterator = networks.iterator();
        while (iterator.hasNext()) {
            WifiConfiguration wifiConfig = iterator.next();
            if (wifiConfig.SSID.equals(ssid))
                state = wm.enableNetwork(wifiConfig.networkId, true);
            else
                wm.disableNetwork(wifiConfig.networkId);
        }
        wm.reconnect();
    }
    return state;
}

Answer 4

尝试在您尝试禁用其他网络的地方设置 false。

wifiManager.enableNetwork(netId, false);

如果您的 addNetwork 成功，还有一件事，那么您可以继续其余的事情。如果它返回 -1，则您无法调用 enableNetwork，因为您使用的 netId 将是 -1。所以理想情况下你可以做的是

netId = wifiManager.addNetwork(wifiConfiguration);
if(netId >= 0){
Log.d("WifiPreference", "add Network returned " + netId);
boolean checkEnableWifi = wifiManager.enableNetwork(netId, true);
Log.d("WifiPreference", "enableNetwork returned " + checkEnableWifi);
}

Answer 5

尝试添加 wifiManager.setWifiEnabled(true);在代码的末尾。