title: Why doesn't work Wi-fi scanning in the background without location service on android 6.0?
body: <p>My question is very simple.
  when device OS was Lolipop or kitkat or jellybean, i could get Wi-fi scan result in background without Location service well.(it means Location service turn off)
  after OS upgrade to 6.0 Mashmallow, it doesn't work.</p>
  
  <p>if i turn on the location service, i can get Wi-fi scan result in background on Android 6.0.</p>
  
  <p>why it doesn't work? and
  How i can get Wi-fi scan result in Background on 6.0.</p>