I am developing an android app in which I specifically need to make a HTTP connection over WiFi only. It seems there were a lot of connectivity related changes in Android L and above.
This is the piece of code I'm using:
ConnectivityManager manager = (ConnectivityManager)
ctx.getSystemService(Context.CONNECTIVITY_SERVICE);
Network[] allNetworks = manager.getAllNetworks();
for(Network network : allNetworks) {
NetworkInfo info = manager.getNetworkInfo(network);
if(info.getType() == ConnectivityManager.TYPE_WIFI && info.getState() == NetworkInfo.State.CONNECTED) {
System.out.println("FOUND WIFI NETWORK!");
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
manager.bindProcessToNetwork(network);
}
app.network = network;
break;
}
}
As per ConnectivityManager and Network API docs I should be able to do networkObject.openConnection to get a HttpUrlConnection bound that network. But I'm getting exception something of this type
W/System.err: java.net.SocketException: Binding socket to network 586 failed: EPERM (Operation not permitted)
W/System.err: at android.net.Network.bindSocket(Network.java:362)
W/System.err: at android.net.Network.bindSocket(Network.java:331)
W/System.err: at android.net.Network$NetworkBoundSocketFactory.createSocket(Network.java:182)
W/System.err: at com.android.okhttp.internal.http.SocketConnector.connectRawSocket(SocketConnector.java:155)
W/System.err: at com.android.okhttp.internal.http.SocketConnector.connectCleartext(SocketConnector.java:67)
W/System.err: at com.android.okhttp.Connection.connect(Connection.java:152)
W/System.err: at com.android.okhttp.Connection.connectAndSetOwner(Connection.java:185)
W/System.err: at com.android.okhttp.OkHttpClient$1.connectAndSetOwner(OkHttpClient.java:128)
W/System.err: at com.android.okhttp.internal.http.HttpEngine.nextConnection(HttpEngine.java:341)
W/System.err: at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:330)
W/System.err: at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:248)
W/System.err: at com.android.okhttp.internal.huc.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:437)
W/System.err: at com.android.okhttp.internal.huc.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:114)
W/System.err: at com.android.okhttp.internal.huc.HttpURLConnectionImpl.getOutputStream(HttpURLConnectionImpl.java:245)
W/System.err: at com.mypkg.myapp.utils.HttpRequestBackground.doInBackground(HttpRequestBackground.java:90)
W/System.err: at com.mypkg.myapp.utils.HttpRequestBackground.doInBackground(HttpRequestBackground.java:38)
W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:295)
W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:237)
W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234)
W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
W/System.err: at java.lang.Thread.run(Thread.java:818)
W/System.err: Caused by: android.system.ErrnoException: Binding socket to network 586 failed: EPERM (Operation not permitted)
These are the network related permissions declared in the manifest
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
I'm not quite understanding what's wrong here.
The reason to do this: Android doesn't let me use wifi connection in my app when data is enabled and the AP to which it is connected does not have internet.
Copyright Notice：Content Author:「Nilesh」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/41189537/sending-traffic-in-android-app-via-particular-connection