在Android 5和6中自动连接到WiFi网络 [英] Connecting to WiFi network automatically in Android 5 and 6
问题描述
一段时间以来，我一直在努力连接Android 5和6中的WiFi网络，而其他类似问题似乎对我不起作用.我可以在Android 4.4.2中获得相同的代码
Been struggling with connecting to WiFi network in Android 5 and 6 for a while and other similar questions don't seem to work for me. I could get the same code working in Android 4.4.2
在下面添加代码段.
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();
这就是我所注意到的.
mWifiManager.addNetwork(conf)
mWifiManager.addNetwork(conf)
使用Android 5(电话)和Android 6(标签)返回一些(+)整数.
returns some (+) integer with Android 5(phone) and Android 6(tab).
但是除非我打开wifi设置(我不需要做任何事情，只需要登陆那里就可以连接)，要么手动关闭并从顶部栏中打开Wifi以自动连接，否则两者都不会连接.
But both don't connect unless I open the wifi settings (I don't have to do anything and just landing there connects) or I manually turn off and turn on Wifi from the top bar to automatically connect.
两个版本的侦听器都可以正常检测到网络连接，以准确知道何时建立连接-确认上述行为.随附了下面授予的权限的图片.
The listeners to detect connection to the network are in tact for both the versions to precisely know when the connection get established - confirming the above behaviour. Have attached a pic of the permissions granted below.
关于我所缺少的内容的任何指针吗?
Any pointers as to what I am missing?
EDIT:深入研究WifiManager类后，访问点似乎仍处于WIFI_AP_STATE_DISABLED状态.我还应该强调指出，尝试使用其他Android M手机时，一切正常.
EDIT: Upon digging into WifiManager class, looks like the Access Point remains in WIFI_AP_STATE_DISABLED state. I should also highlight that everything worked as expected while trying on a different Android M phone.
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?
推荐答案
我相信，如果您添加disconnect()，它将完成您想要的操作.我在此处添加了一项检查，因为addNetwork()可能无法添加您的网络.对于Android 6.0+，您无法添加网络(如果已经存在)，但是如果失败，则可以尝试获取网络ID，然后进行连接. (例如，如果您重新安装后添加(并保存)，它将在那里.)我也不会在Lollipop(版本21)+的SSID中添加引号.
I believe if you add a disconnect() it will do what you want. I've added a check here because addNetwork() can fail to add your network. For Android 6.0+, you can't add a network if it exists already but if this fails you can try getting the network id then connecting. (For instance, it will be there if added (and saved) if you re-install) I also do not add quotes to SSID in Lollipop (ver 21)+.
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();
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