ud_an ud_an - 3 months ago 15
Android Question

android scan for wifi network

i am trying out this code for scanning wifi networks but getting null pointer exception not sure what problem i registered all permission in manifest.

IntentFilter i = new IntentFilter();
i.addAction(WifiManager.SCAN_RESULTS_AVAILABLE_ACTION);

registerReceiver(new BroadcastReceiver(){

@Override

public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Log.i(TAG, "opening wifimanager");
WifiManager mWifiManager = (WifiManager) context.getSystemService(Context.WIFI_SERVICE);
mWifiManager.getScanResults();

}
}
,i);



mWifiManager.startScan();

Answer

Are you testing this on a device or on a stimulator. And have you added the following permissions on your Manifest

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"></uses-permission>
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE"></uses-permission>