在Android 5和6中自动连接到WiFi网络

Question

一直在努力连接到WiFi网络在Android 5和6一段时间和其他类似的问题似乎不适合我。我可以得到相同的代码工作在Android 4.4.2

添加下面的代码片段。

        String networkSSID = getSsid();
        String networkPass = getNetworkPass();

        WifiConfiguration conf = new WifiConfiguration();
        conf.SSID = "\"" + networkSSID + "\"";
        conf.status = WifiConfiguration.Status.ENABLED;
        conf.priority = 40;

        conf.allowedProtocols.set(WifiConfiguration.Protocol.RSN);
        conf.allowedProtocols.set(WifiConfiguration.Protocol.WPA);
        conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK);
        conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP);
        conf.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP);
        conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP40);
        conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.WEP104);
        conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.CCMP);
        conf.allowedGroupCiphers.set(WifiConfiguration.GroupCipher.TKIP);

        conf.preSharedKey = "\""+ networkPass +"\"";
        int value = mWifiManager.addNetwork(conf);
        Log.i(TAG_CHECK, "Connecting to : " + value);
        boolean enabled = mWifiManager.enableNetwork(value, true);
        Log.i(TAG_CHECK, "enabled to : " + enabled);
        mWifiManager.reconnect();

这是我注意到的。

我是经理。添加网络（配置）

返回一些（）整数与Android 5（手机）和Android 6（标签）.

但是，除非我打开wifi设置（我不需要做任何事情，只要在那里登陆即可连接），或者我从顶部栏手动关闭并打开wifi以自动连接，否则两者都不会连接。

用于检测网络连接的侦听器能够准确地知道两个版本何时建立连接，从而确认上述行为。已附上下面授予的权限的图片。

有没有关于我遗漏了什么的建议？

EDIT：深入到WifiManager类后，似乎接入点仍处于WIFI_AP_STATE_DISABLED状态。我还应该强调，在尝试不同的Android M手机时，一切都按预期进行。

EDIT2

I have the following observations.

1. The issue so far is specific to 1 android 6.0.1 Samsung tablet and 1 android 5.0.2 Micromax phone. It works just fine on 3 other android 6.0.1 phones, 1 android N phone and Android 4.4.2 phone. 
2. The access point ends up in wifi_ap_disabled state in the problematic cases consistently. Both addNetwork and enableNetwork calls are affirmative.
3. These access points are not that of a router wifi but that of other phones that broadcast. The problematic phones can programatically connect to wifi hotspots (setup manually and not in the programatic way as I would like to) without any issue.
4. Mobile data enabled/disabled state or wifi state with a different connected network doesn't change the dynamics for both working and problematic phones. 

This makes me think that it is a combination of phones/tabs (and not OS) and the access point broadcast configuration. Do you think I should be playing around with some config parameters?



Edit 3 - Important Update

So the wifimanager is obtained like below

WifiManager mWifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);

I instantiate mWifiManager in a service (inside onCreate method) and use that later to scan and connect with inputs from front-end activity. While it doesn't work in the way as described earlier, using the same snippet seems to work when the enableNetwork call is done right in the onCreate method - working just as expected. It also works fine when called from front-end activity but only when I don't instantiate mWifiManager in the service.

Though I would expect only one reference to a system service - WifiManager i.e, I think the subsequent usage of that reference (or a different reference to WifiManager) gets a lower priority (or gets deprioritized  by the previous reference)  and hence doesn't get completely executed leaving the access point in disabled state and requiring manual intervention to help complete the execution by WifiManager and other wifi system services.

Also, I notice the same in Android 5.0.2 phone, the asynchronous enableNetwork does get executed, but it takes some time to execute it.

My questions
1. It is no more a question about the correctness of the code. Services in general have lesser priority compared to front-end threads So, is there is way I could prioritise the enableNetwork call so that it gets immediately executed?
2. What happens in case of multiple references to WifiManager? 

Answer 1

我相信如果你添加一个dislink（），它会做你想要的。我在这里添加了一个检查，因为addNetwork（）可能无法添加您的网络。对于Android6.0，如果网络已经存在，你不能添加网络，但是如果失败，你可以尝试获取网络标识然后连接。（例如，如果你重新安装，它会在那里添加（并保存））我也不会在Lollipop（第21版）中向SSID添加引号。

int value = mWifiManager.addNetwork(conf);
// need to check the result if successful
if (value == -1) {
    return; // network not added successfully
}
Log.i(TAG_CHECK, "Connecting to : " + value);
mWifiManager.disconnect();  // add a disconnect
boolean enabled = mWifiManager.enableNetwork(value, true);
Log.i(TAG_CHECK, "enabled to : " + enabled);
mWifiManager.reconnect();