Shouldn't "beaconManager" be instance variable, not local function's variable?

[pbrewczynski]

In your quick example you have:

 // Should be invoked in #onCreate.
BeaconManager beaconManager = new BeaconManager(context);
  beaconManager.setRangingListener(new BeaconManager.RangingListener() {
    @Override public void onBeaconsDiscovered(Region region, List<Beacon> beacons) {
      Log.d(TAG, "Ranged beacons: " + beacons);
    }
  });

Next part assume beaconManager is instance variable of that class, but it isn't.

  // Should be invoked in #onStart.
  beaconManager.connect(new BeaconManager.ServiceReadyCallback() {
    @Override public void onServiceReady() {
      try {
        beaconManager.startRanging(ALL_ESTIMOTE_BEACONS);
      } catch (RemoteException e) {
        Log.e(TAG, "Cannot start ranging", e);
      }
    }
  });

Shouldn't beaconManager be instance variable ?

That is:

private BeaconManager beaconManager;

[wiktor]

Obviously yes.