Разработка Android-приложений с Augmented Reality

import android.support. v4.app. DialogFragment;

import android.support.v4.widget.NestedScrollView;

import android.support.v7.app.AlertDialog;

import android.view.LayoutInflater;

import android.view.View;

import android.support.design.widget.NavigationView;

import android.support.v4.view.GravityCompat;

import android.support. v4.widget. DrawerLayout;

import android.support.v7.app.ActionBarDrawerToggle;

import android.support. v7.app. AppCompatActivity;

import android.support.v7.widget.Toolbar;

import android.view.MenuItem;

import android.Manifest;

import android.content.Context;

import android.content.SharedPreferences;

import android.content.pm.PackageManager;

import android.hardware.Sensor;

import android.hardware.SensorEvent;

import android.hardware.SensorManager;

import android. location. Location;

import android.support.annotation.NonNull;

import android.support.annotation.Nullable;

import android.support.v4.app.ActivityCompat;

import android.view.ViewGroup;

import android.view.ViewTreeObserver;

import android.widget.ProgressBar;

import android. widget. RadioButton;

import android. widget. RadioGroup;

import android.widget.Toast;

import com.beyondar.android.fragment.BeyondarFragmentSupport;

import com.beyondar.android.plugin. radar. RadarView;

import com.beyondar.android.plugin. radar. RadarWorldPlugin;

import com.beyondar.android.sensor.BeyondarSensorListener;

import com.beyondar.android.sensor.BeyondarSensorManager;

import com.beyondar.android. world. World;

import com.beyondar.android. opengl. util. LowPassFilter;

import com.google.android.gms.common.ConnectionResult;

import com.google.android.gms.common. api. GoogleApiClient;

import com.google.android.gms. location. LocationListener;

import com.google.android.gms. location. LocationRequest;

import com.google.android.gms. location. LocationServices;

import org. json. JSONArray;

import org. json. JSONObject;

import java.util.Iterator;

import java.util.LinkedHashSet;

import java.util.Set;

public class MainActivity extends AppCompatActivity

implements NavigationView. OnNavigationItemSelectedListener, BeyondarSensorListener, LocationListener, GoogleApiClient.ConnectionCallbacks, GoogleApiClient. OnConnectionFailedListener {

private BeyondarFragmentSupport mBeyondarFragment;

private World mWorld;