說(shuō)明：

本文主要說(shuō)明掃碼之后自動(dòng)連接WiFi的一些處理，掃碼的流程相對(duì)簡(jiǎn)單，網(wǎng)上教程也比較多，對(duì)于目前Android各個(gè)版本也沒(méi)有太多變化。

問(wèn)題描述：

最近在做項(xiàng)目的時(shí)候，發(fā)現(xiàn)以前的項(xiàng)目有掃描二維碼自動(dòng)連接WiFi的功能，設(shè)備改了生成二維碼的方式，然后發(fā)現(xiàn)手機(jī)無(wú)法自動(dòng)連接WiFi了。

問(wèn)題原因：

經(jīng)過(guò)代碼調(diào)試發(fā)現(xiàn)：（我都是真機(jī)調(diào)試）

wifiManager.addNetwork(WifiConfiguration);

在添加WiFi的時(shí)候，這行代碼始終返回-1，換用同事手機(jī)竟然神奇的可以連接，然后一臉蒙蔽，裂開(kāi)了，不怕有問(wèn)題，就怕有的有問(wèn)題，有的沒(méi)問(wèn)題。

問(wèn)題解決：

區(qū)別：我測(cè)試手機(jī) 小米10 android Q（andorid 10）的系統(tǒng)，同事手機(jī)榮耀 android P的系統(tǒng)，大膽猜測(cè)是不是android 10又搞了什么奇怪的東西

根因：皇天不負(fù)有心人，上代碼：

/** * Add a new network description to the set of configured networks. * The {@code networkId} field of the supplied configuration object * is ignored. * <p/> * The new network will be marked DISABLED by default. To enable it, * called {@link #enableNetwork}. * * @param config the set of variables that describe the configuration, * contained in a {@link WifiConfiguration} object. * If the {@link WifiConfiguration} has an Http Proxy set * the calling app must be System, or be provisioned as the Profile or Device Owner. * @return the ID of the newly created network description. This is used in * other operations to specified the network to be acted upon. * Returns {@code -1} on failure. * * @deprecated * a) See {@link WifiNetworkSpecifier.Builder#build()} for new * mechanism to trigger connection to a Wi-Fi network. * b) See {@link #addNetworkSuggestions(List)}, * {@link #removeNetworkSuggestions(List)} for new API to add Wi-Fi networks for consideration * when auto-connecting to wifi. * <b>Compatibility Note:</b> For applications targeting * {@link android.os.Build.VERSION_CODES#Q} or above, this API will always return {@code -1}. */ @Deprecated public int addNetwork(WifiConfiguration config) { if (config == null) { return -1; } config.networkId = -1; return addOrUpdateNetwork(config); }

這是WifiManager.class中addNetwork方法的描述，注意注釋中最后一行

{@link android.os.Build.VERSION_CODES#Q} or above, this API will always return {@code -1}.

android Q或者更高的版本，這個(gè)方法始終返回-1，至此問(wèn)題原因分析完畢，接下來(lái)開(kāi)始解決：官網(wǎng)一頓操作：Android 10 的新方案如下連接：https://developer.android.google.cn/guide/topics/connectivity/wifi-bootstrap

代碼如下：

public void test() { if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) { NetworkSpecifier specifier = new WifiNetworkSpecifier.Builder() .setSsidPattern(new PatternMatcher('此處WiFi名稱', PatternMatcher.PATTERN_PREFIX)) .setWpa2Passphrase('此處WiFi密碼') .build(); NetworkRequest request = new NetworkRequest.Builder() .addTransportType(NetworkCapabilities.TRANSPORT_WIFI) .removeCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET) .setNetworkSpecifier(specifier) .build(); ConnectivityManager connectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE); ConnectivityManager.NetworkCallback networkCallback = new ConnectivityManager.NetworkCallback() {@Overridepublic void onAvailable(Network network) { // do success processing here..} @Overridepublic void onUnavailable() { // do failure processing here..} }; connectivityManager.requestNetwork(request, networkCallback); // Release the request when done. // connectivityManager.unregisterNetworkCallback(networkCallback); } }

注：我用的是WPA的 加密模式，親測(cè)可用。至此完結(jié)，撒花。

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