Тимур Машнин - Разработка Android-приложений с Augmented Reality

@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);

} else {

startLocationUpdates ();

}

}

@Override

public void onConnectionSuspended (int i) {

mGoogleApiClient.connect ();

}

@Override

public void onConnectionFailed (@NonNull ConnectionResult connectionResult) {

}

@Override

public void onLocationChanged (Location location) {

mCurrentLocation = location;

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

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

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

toast.show ();

mWorld.clearWorld ();

mWorld = CustomWorldHelper.generateObjects (this, mCurrentLocation);

mBeyondarFragment.setWorld (mWorld);

}

}

Теперь дополненная реальность будет привязана к текущему местоположению пользователя.

В качестве примера использования фреймворка BeyondAR создадим игровое приложение Creatures in Camera, в котором пользователь сможет расставлять 2D объекты в реальном мире, а потом наблюдать их через камеру.

Создадим новый проект в Android Studio, используя шаблон Navigation Drawer Activity.

Для сборки APK файла с большим количеством методов в коде, в Gradle файл добавим:

defaultConfig {

multiDexEnabled true

}

dependencies {

compile 'com.android.support: multidex:1.0.0»

}

android {

dexOptions {

javaMaxHeapSize «4g»

}

}

В файл манифеста добавим:

android:name="android.support.multidex.MultiDexApplication»>

Добавим зависимость от библиотек beyondar-googlemap-plugin-v0.9.0.jar, beyondar-radar-plugin-v0.9.1.jar и beyondar-v0.9.3.jar, скопировав соответствующие файлы в папку libs проекта.

Добавим зависимость от библиотеки Google Play Services.

compile 'com.google.android.gms: play-services:9.6.1»

Добавим необходимые разрешения в файл манифеста.

Для использования Google Map добавим Google API Key в файл манифеста. Для того получим ключ в Google Developers Console и добавим в тег файла манифеста.