GoogleAwarenessSampleCode.java

private Task<WeatherResult> queryWeather() {
  final TaskCompletionSource<WeatherResult> task = new TaskCompletionSource<>();
  Awareness.SnapshotApi.getWeather(mApiClient)
      .setResultCallback(new ResultCallback<WeatherResult>() {
          @Override
          public void onResult(@NonNull WeatherResult weatherResult) {
              if (!weatherResult.getStatus().isSuccess()) {
                  task.setError(new IllegalStateException("Could not get weather."));
                  return;
              }
              task.setResult(weatherResult);
          }
      });
  return task.getTask();
}

private Task<List<PlaceLikelihood>> queryPlaces() {
  final TaskCompletionSource<List<PlaceLikelihood>> task = new TaskCompletionSource<>();
  Awareness.SnapshotApi.getPlaces(mApiClient).setResultCallback(new ResultCallback<PlacesResult>() {
      @Override
      public void onResult(@NonNull PlacesResult placesResult) {
          if (!placesResult.getStatus().isSuccess()) {
              task.setError(new IllegalStateException("Could not get places."));
              return;
          }
          List<PlaceLikelihood> places = placesResult.getPlaceLikelihoods();
          task.setResult(places);

      }
  });
  return task.getTask();
}

private Task<Void> setupGoogleApiClient() {
    final TaskCompletionSource<Void> task = new TaskCompletionSource<>();
    mApiClient = new GoogleApiClient.Builder(this)
        .addApi(Awareness.API)
        .enableAutoManage(this, 1, null)
        .addConnectionCallbacks(new GoogleApiClient.ConnectionCallbacks() {
            @Override
            public void onConnected(@Nullable Bundle bundle) {
                task.trySetResult(null);
            }

            @Override
            public void onConnectionSuspended(int i) {
                task.trySetResult(null);
            }
        }).build();
    return task.getTask();
}

public static void main() {
    // pre-query the location/weather information
    setupGoogleApiClient().onSuccessTask(new Continuation<Void, Task<WeatherResult>>() {
        @Override
        public Task<WeatherResult> then(Task<Void> task) throws Exception {
            return queryWeather();
        }
    }).onSuccessTask(new Continuation<WeatherResult, Task<List<PlaceLikelihood>>>() {
        @Override
        public Task<List<PlaceLikelihood>> then(Task<WeatherResult> task) throws Exception {
            WeatherResult weather = task.getResult(); // getting the weather information here
            return queryPlaces();
        }
    }).onSuccess(new Continuation<List<PlaceLikelihood>, Void>() {
        @Override
        public Void then(Task<List<PlaceLikelihood>> task) throws Exception {
            List<PlaceLikelihood> places = task.getResult(); // getting the list of places here 
            return null;
        }
    });
}