Android 5.0 Lollipop和4.4 KitKat忽略了我的WiFi网络,enableNetwork()无效 [英] Android 5.0 Lollipop and 4.4 KitKat ignores my WiFi network, enableNetwork() is useless
问题描述
我的应用程序直接连接到充当访问点(无法访问互联网)的硬件设备.
我无法连接,因为Android 5.0会自动切换到有效的互联网连接,因此,如果我具有数据连接(3G,4G,...)或预先配置的网络,则无法连接到我的设备,因为它忽略WiFi.
I can't connect because Android 5.0 automaticcaly switch to a valid internet connection, so if I have data connection (3G, 4G, ...) or a pre-configured network I can't connect to my device because it ignores the WiFi.
那么如何强制Android使用我以编程方式激活的网络?
So how can I force Android to use the network I activated programatically?
我只是在使用:
wifiManager.enableNetwork(id, true))
其中id
是我要连接的设备的网络. true
参数没有用.
where id
is the network of my device I want to connect to. The true
parameter is useless.
使用ConnectivityManager.requestNetwork()
的建议解决方案无效.
The suggested solution that use ConnectivityManager.requestNetwork()
has no effect.
推荐答案
我找到了一种解决方法,可以在Lollipop上启用所需的网络:
I found a workaround to enable the desidered network on Lollipop:
WifiConfiguration在Lollipop中启用网络
现在,这是调用wifiManager.enableNetwork(id, true)
之后的代码:
Now this is my code after calling wifiManager.enableNetwork(id, true)
:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
WifiManager wm = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
List<WifiConfiguration> networks = wm.getConfiguredNetworks();
Iterator<WifiConfiguration> iterator = networks.iterator();
while (iterator.hasNext()) {
WifiConfiguration wifiConfig = iterator.next();
if (wifiConfig.SSID.replace("\"", "").equals(wc.SSID.replace("\"", "")))
wm.enableNetwork(wifiConfig.networkId, true);
else
wm.disableNetwork(wifiConfig.networkId);
}
wm.reconnect();
}
也许秘密在于打给reconnect()
的电话,我目前不知道.
maybe the secret is the call to reconnect()
, I don't know at this time.
更新 不幸的是,只有在执行代码之前有效的WiFi连接处于活动状态时,此解决方法才有效.如果仅通过3G进行连接,则无法使用.
UPDATE Unfortunately, this workaround only works if a valid WiFi connection is active before executing the code. Does not works if you're connect by 3G only.
更新2015年1月19日
此代码实际上在Android 5/6.0.x上对我有效:
This code actually works for me on Android 5/6.0.x:
//bind to current thread
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
ConnectivityManager connManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkRequest.Builder request = new NetworkRequest.Builder();
request.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
connManager.registerNetworkCallback(request.build(), new ConnectivityManager.NetworkCallback() {
@Override
public void onAvailable(Network network) {
ConnectivityManager.setProcessDefaultNetwork(network);
//...
}
});
}
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