Not receiving any addresses in Array List

Not receiving any addresses in Array List

For some reason, this Android java method will not provide me any usable
Zip codes. Every time I make a change and check the addresses array list,
it is completely empty. I have been at this for many hours now. What am I
missing?
protected String getZipCode() {
String zipCode = "00000";
LocationManager lm = (LocationManager)
getSystemService(Context.LOCATION_SERVICE);
boolean gpsEnabled = lm.isProviderEnabled(LocationManager.GPS_PROVIDER);
Location location;
if (gpsEnabled == true) {
LocationListener locationListener = new LocationListener() {
@Override
public void onLocationChanged(Location location) {
longitude = location.getLongitude();
latitude = location.getLatitude();
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onStatusChanged(String provider, int status,
Bundle extras) {
}
};
lm.requestLocationUpdates(LocationManager.GPS_PROVIDER, 1000, 1,
locationListener);
Geocoder geocoder = new Geocoder(this, Locale.getDefault());
try {
List<Address> addresses = geocoder.getFromLocation(latitude,
longitude, 1);
zipCode = addresses.get(0).getPostalCode();
} catch (IOException e) {
Log.v(TAG, "Exception caught!", e);
} catch (IndexOutOfBoundsException e) {
Log.v(TAG, "Exception caught!", e);
}
return zipCode;
}
else {
alertGPSDisabled();
return zipCode;
}
}
UPDATE: And here are my Android Manifest permissions
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />