Hi,
I've been trying in different ways to create and acquire a Wifi lock
in WIFI_MODE_SCAN_ONLY mode. The final aim is to develop a wifi
connection manager app, which should allow a user to scan for wifi
networks, connect to a given SSID, or disconnect from it.
Here's an excerpt of the code i'm using at the moment, which seems to
be creating a wifi lock correctly, but still, if i disconnect from a
SSID, 3 seconds later a scan is automatically initiated and the wifi
connects to the first known (remembered) SSID.
private TrustiveWifi(Context context) {
Log.d(TAG, "Created TrustiveWifi");
this.context = context;
wm = (WifiManager) context.getSystemService
(context.WIFI_SERVICE);
......................
// create a wifi lock to prevent the wifi from shutting down
// the mode will be WIFI_MODE_SCAN_ONLY until a connection is
explicitely required
createWifiLock(false);
......................
}
public static TrustiveWifi getInstance(Context context) { //
singleton
if (INSTANCE == null) {
INSTANCE = new TrustiveWifi(context);
}
return INSTANCE;
}
public void finalize() throws Throwable {
Log.d(TAG, "Finalizing");
try {
releaseWifiLock();
......................
} catch(Exception e) {
} finally {
super.finalize();
}
}
public void createWifiLock(boolean wifi_mode_full) {
releaseWifiLock();
Log.d(TAG, "createWifiLock with full mode=" + wifi_mode_full);
wifiLock = wm.createWifiLock(wifi_mode_full ?
wm.WIFI_MODE_FULL : wm.WIFI_MODE_SCAN_ONLY, "TrustiveWifi wifilock");
wifiLock.setReferenceCounted(false);
wifiLock.acquire();
Log.d(TAG, "created a wifi lock: " + wifiLock.toString());
}
public void releaseWifiLock() {
if (wifiLock != null && wifiLock.isHeld()) {
Log.d(TAG, "Release wifi lock");
wifiLock.release();
}
}
public void disconnect() {
Log.d(TAG, "disconnecting");
createWifiLock(false);
wm.disconnect();
}
/** returns false if the network isn't configured yet. Create a
new wifi lock with mode WIFI_MODE_FULL */
public boolean connect(int selectedHotspot) {
String selectedSSID = wifiNetworks.get
(selectedHotspot).scanResult.SSID;
for (WifiConfiguration wc: wm.getConfiguredNetworks()) {
String ssid = wc.SSID.replaceAll("\"", "");
if (ssid.equals(selectedSSID)) {
Log.d(TAG, "Connecting to hotspot: " + wifiNetworks.get
(selectedHotspot));
createWifiLock(true);
wm.enableNetwork(wc.networkId, true);
return true;
}
}
Log.d(TAG, "Connection requested, but hotspot not configured
yet");
return false; // hotspot not found in the configured networks
}
I have no clue how to move forward on this issue, so any help and/or
advice will be greatly appreciated!
Mathieu
--
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to android-developers@googlegroups.com
To unsubscribe from this group, send email to
android-developers+unsubscr...@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en
