I have 2 buttons in my app.
button 1: connect wifi button 2: create a client socket
with individual 2 buttons this functionality works.
void WifiConnect() {
String networkSSID = "HI-LINK_DA79";
String networkPass = "12345678";
WifiConfiguration conf = new WifiConfiguration();
conf.SSID = "\"" + networkSSID + "\""; //ssid must be in quotes
conf.preSharedKey = "\""+ networkPass +"\"";
WifiManager wifiManager = (WifiManager)getSystemService(WIFI_SERVICE);
int r1 =-1;
r1= wifiManager.addNetwork(conf);
Log.d("Client", "add Network returned " + r1 );
boolean b = wifiManager.enableNetwork(r1, true);
Log.d("Client", "enableNetwork returned " + b );
boolean d= wifiManager.reconnect();
Log.d("Client", "wifiManager.reconnect() returned " + d )
}
`Button.OnClickListener buttonWifiConnectOnClickListener = new Button.OnClickListener() {
public void onClick(View v) {
WifiConnect();
}
};
Button.OnClickListener buttonConnectOnClickListener = new Button.OnClickListener() {
public void onClick(View v) {
if (socket == null) {
Log.i("Client", "socket():Creating --");
new Thread(new ClientThread()).start();
//connect.setText("Disconnect");
}
else
{
try {
socket.close();
socket=null;
Log.i("Client", "socket():closed --");
// connect.setText("Connect");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
};
`
But this don't work if I combine them in one button click `Button.OnClickListener buttonConnectOnClickListener = new Button.OnClickListener() {
public void onClick(View v) {
WifiConnect(); //WiFi connect
if (socket == null) {
Log.i("Client", "socket():Creating --");
new Thread(new ClientThread()).start();
//connect.setText("Disconnect");
}
else
{
try {
socket.close();
socket=null;
Log.i("Client", "socket():closed --");
// connect.setText("Connect");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
};
`
looks like my thread to create socket is not not called here, don't know why.
If you want both operation to work on a single button click, then add a BroadcastReceiver for listening to Wifi connection state, as shown in below. & in the onReceive() method do the socket connection. Your socket connection is not working when in same button click because Wifi connection takes time & without first Wifi being connected socket connection is being created, so it might throw an exception.
Checking for whether Wi-Fi is enabled, that doesn't necessarily mean that it's connected. It just means that Wi-Fi mode on the phone is enabled and able to connect to Wi-Fi networks.
This is how listening for actual Wi-Fi connections in Broadcast Receiver:
public class WifiReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
ConnectivityManager conMan = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo netInfo = conMan.getActiveNetworkInfo();
if (netInfo != null && netInfo.getType() == ConnectivityManager.TYPE_WIFI) {
Log.d("WifiReceiver", "Have Wifi Connection");
//If connected do socket connection here
}
else
Log.d("WifiReceiver", "Don't have Wifi Connection");
}
};
In order to access the active network info you need to add the following uses-permission to your AndroidManifest.xml:
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
And the following intent receiver (or you could add this programmatically...)
<!-- Receive Wi-Fi connection state changes -->
<receiver android:name=".WifiReceiver">
<intent-filter>
<action android:name="android.net.conn.CONNECTIVITY_CHANGE" />
</intent-filter>
</receiver>
& make sure that network activity is done on other thread than Main thread. Also you'll have to register & unregister the BroadcastReceiver appropriately. Don't forget to unregister it when not needed.