public static void updateConnectButton() { Log.v("ActivityPreferencesCon", "updateConenctionbuttons"); if (mMenu == null) return; MenuItem connectButton = mMenu.findItem(R.id.connect); if (connectButton == null) return; boolean canConnect = Preferences.canConnect(); connectButton.setEnabled(canConnect); connectButton.getIcon().setAlpha(canConnect ? 255 : 130); }