Разработка Android-приложений с Augmented Reality - Тимур Машнин

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mCurrentLocation;

      LocationRequest mLocationRequest;

      /** Called when the activity is first created. */

      @Override

      public void onCreate (Bundle savedInstanceState) {

      super. onCreate (savedInstanceState);

      // Hide the window title.

      requestWindowFeature (Window. FEATURE_NO_TITLE);

      setContentView(R.layout.simple_camera);

      mBeyondarFragment = (BeyondarFragmentSupport) getSupportFragmentManager () .findFragmentById(R.id.beyondarFragment);

      // We also can see the Frames per seconds

      mBeyondarFragment.showFPS (false);

      // We create the world and fill it…

      mWorld = CustomWorldHelper.generateObjects (this, mCurrentLocation);

      // … and send it to the fragment

      mBeyondarFragment.setWorld (mWorld);

      LowPassFilter.ALPHA = 0.003f;

      buildGoogleApiClient ();

      }

      /**

      * Builds a GoogleApiClient. Uses the {@code #addApi} method to request the

      * LocationServices API.

      */

      protected synchronized void buildGoogleApiClient () {

      mGoogleApiClient = new GoogleApiClient. Builder (this)

      .addConnectionCallbacks (this)

      .addOnConnectionFailedListener (this)

      .addApi (LocationServices. API)

      .build ();

      createLocationRequest ();

      }

      protected void createLocationRequest () {

      mLocationRequest = LocationRequest.create ();

      // Sets the desired interval for active location updates. This interval is

      // inexact. You may not receive updates at all if no location sources are available, or

      // you may receive them slower than requested. You may also receive updates faster than

      // requested if other applications are requesting location at a faster interval.

      mLocationRequest.setInterval (10000);

      // Sets the fastest rate for active location updates. This interval is exact, and your

      // application will never receive updates faster than this value.

      mLocationRequest.setFastestInterval (5000);

      mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);

      }

      @Override

      public void onStart () {

      super. onStart ();

      mGoogleApiClient.connect ();

      }

      @Override

      public void onStop () {

      super. onStop ();

      mGoogleApiClient. disconnect ();

      }

      @Override

      public void onResume () {

      super. onResume ();

      // Within {@code onPause ()}, we pause location updates, but leave the

      // connection to GoogleApiClient intact. Here, we resume receiving

      // location updates if the user has requested them.

      if (mGoogleApiClient.isConnected ()) {

      startLocationUpdates ();

      }

      }

      @Override

      protected void onPause () {

      super. onPause ();

      // Stop location updates to save battery, but don’t disconnect the GoogleApiClient object.

      if (mGoogleApiClient.isConnected ()) {

      stopLocationUpdates ();

      }

      }

      protected void startLocationUpdates () {

      if (ActivityCompat.checkSelfPermission (this, android.Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission (this, android.Manifest.permission.ACCESS_COARSE_LOCATION)!= PackageManager.PERMISSION_GRANTED) {

      return;

      }

      LocationServices.FusedLocationApi.requestLocationUpdates (

      mGoogleApiClient, mLocationRequest, this);

      }

      /**

      * Removes location updates from the FusedLocationApi.

      */

      protected void stopLocationUpdates () {

      // It is a good practice to remove location requests when the activity is in a paused or

      // stopped state. Doing so helps battery performance and is especially

      // recommended in applications that request frequent location updates.

      // The final argument to {@code requestLocationUpdates ()} is a LocationListener

      // (http://developer.android.com/reference/com/google/android/gms/location/LocationListener.html).

      LocationServices.FusedLocationApi.removeLocationUpdates (mGoogleApiClient, this);

      }

      @Override

      public void onConnected (@Nullable Bundle bundle) {

      if (ActivityCompat.checkSelfPermission (this, android.Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission (this, android.Manifest.permission.ACCESS_COARSE_LOCATION)!= PackageManager.PERMISSION_GRANTED) {

      // TODO: Consider calling

      // ActivityCompat#requestPermissions

      // here to request the missing permissions, and then overriding

      // public void onRequestPermissionsResult (int requestCode, String [] permissions,

      // int [] grantResults)

      // to handle the case where the user grants the permission. See the documentation

      // for ActivityCompat#requestPermissions for more details.

      return;

      }

      Location mLastLocation = LocationServices.FusedLocationApi.getLastLocation (mGoogleApiClient);

      if (mLastLocation!= null) {

      mCurrentLocation = mLastLocation;

      String lat = String.valueOf(mCurrentLocation.getLatitude ());

      String lon = String.valueOf(mCurrentLocation.getLongitude ());

      Toast toast = Toast.makeText (this, «Last location» + lat + " " + lon, Toast. LENGTH_LONG);

      toast.show ();

      mWorld.clearWorld ();

      mWorld = CustomWorldHelper.generateObjects (this, mCurrentLocation);

      mBeyondarFragment.setWorld (mWorld);

      }

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