Add VR player demo

PiperOrigin-RevId: 251460113

RELEASENOTES.md

@@ -16,6 +16,7 @@
   for the underlying track was changing (e.g., at some period transitions).
   for the underlying track was changing (e.g., at some period transitions).
 * Add a workaround for broken raw audio decoding on Oppo R9
 * Add a workaround for broken raw audio decoding on Oppo R9
   ([#5782](https://github.com/google/ExoPlayer/issues/5782)).
   ([#5782](https://github.com/google/ExoPlayer/issues/5782)).
+* Add VR player demo.
 
 
 ### 2.10.2 ###
 ### 2.10.2 ###
 
 

demos/gvr/README.md

+# ExoPlayer VR player demo #
+
+This folder contains a demo application that showcases 360 video playback using
+ExoPlayer GVR extension.

demos/gvr/build.gradle

+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+apply from: '../../constants.gradle'
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion project.ext.compileSdkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    defaultConfig {
+        versionName project.ext.releaseVersion
+        versionCode project.ext.releaseVersionCode
+        minSdkVersion 19
+        targetSdkVersion project.ext.targetSdkVersion
+    }
+
+    buildTypes {
+        release {
+            shrinkResources true
+            minifyEnabled true
+            proguardFiles getDefaultProguardFile('proguard-android.txt')
+        }
+        debug {
+            jniDebuggable = true
+        }
+    }
+
+    lintOptions {
+        // The demo app isn't indexed and doesn't have translations.
+        disable 'GoogleAppIndexingWarning','MissingTranslation'
+    }
+}
+
+dependencies {
+    implementation project(modulePrefix + 'library-core')
+    implementation project(modulePrefix + 'library-ui')
+    implementation project(modulePrefix + 'library-dash')
+    implementation project(modulePrefix + 'library-hls')
+    implementation project(modulePrefix + 'library-smoothstreaming')
+    implementation project(modulePrefix + 'extension-gvr')
+    implementation 'androidx.annotation:annotation:1.0.2'
+}
+
+apply plugin: 'com.google.android.gms.strict-version-matcher-plugin'

demos/gvr/src/main/AndroidManifest.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.google.android.exoplayer2.gvrdemo">
+
+  <uses-permission android:name="android.permission.INTERNET"/>
+  <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
+
+  <uses-sdk/>
+
+  <application
+      android:allowBackup="false"
+      android:icon="@mipmap/ic_launcher"
+      android:label="@string/application_name"
+      android:largeHeap="true">
+
+    <activity
+        android:name="com.google.android.exoplayer2.gvrdemo.SampleChooserActivity"
+        android:configChanges="keyboardHidden"
+        android:exported="true"
+        android:label="@string/application_name">
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN"/>
+        <category android:name="android.intent.category.LAUNCHER"/>
+      </intent-filter>
+      <intent-filter>
+        <action android:name="android.intent.action.VIEW"/>
+
+        <category android:name="android.intent.category.DEFAULT"/>
+        <category android:name="android.intent.category.BROWSABLE"/>
+
+        <data android:scheme="http"/>
+        <data android:scheme="https"/>
+        <data android:scheme="content"/>
+        <data android:scheme="asset"/>
+        <data android:scheme="file"/>
+        <data android:host="*"/>
+        <data android:pathPattern=".*\\.exolist\\.json"/>
+      </intent-filter>
+    </activity>
+
+    <activity
+        android:name="com.google.android.exoplayer2.gvrdemo.PlayerActivity"
+        android:configChanges="density|keyboardHidden|navigation|orientation|screenSize|uiMode"
+        android:enableVrMode="@string/gvr_vr_mode_component"
+        android:exported="false"
+        android:label="@string/application_name"
+        android:launchMode="singleTask"
+        android:resizeableActivity="false"
+        android:screenOrientation="landscape"
+        android:theme="@style/VrActivityTheme">
+      <intent-filter>
+        <action android:name="android.intent.action.MAIN"/>
+        <category android:name="com.google.intent.category.CARDBOARD"/> <!-- copybara:strip(development-only) -->
+        <category android:name="com.google.intent.category.DAYDREAM"/>
+      </intent-filter>
+    </activity>
+
+  </application>
+
+</manifest>

demos/gvr/src/main/java/com/google/android/exoplayer2/gvrdemo/PlayerActivity.java

+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.android.exoplayer2.gvrdemo;
+
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import androidx.annotation.Nullable;
+import android.widget.Toast;
+import com.google.android.exoplayer2.C;
+import com.google.android.exoplayer2.C.ContentType;
+import com.google.android.exoplayer2.DefaultRenderersFactory;
+import com.google.android.exoplayer2.ExoPlaybackException;
+import com.google.android.exoplayer2.ExoPlayerFactory;
+import com.google.android.exoplayer2.PlaybackPreparer;
+import com.google.android.exoplayer2.Player;
+import com.google.android.exoplayer2.SimpleExoPlayer;
+import com.google.android.exoplayer2.ext.gvr.GvrPlayerActivity;
+import com.google.android.exoplayer2.source.MediaSource;
+import com.google.android.exoplayer2.source.ProgressiveMediaSource;
+import com.google.android.exoplayer2.source.TrackGroupArray;
+import com.google.android.exoplayer2.source.dash.DashMediaSource;
+import com.google.android.exoplayer2.source.hls.HlsMediaSource;
+import com.google.android.exoplayer2.source.smoothstreaming.SsMediaSource;
+import com.google.android.exoplayer2.trackselection.AdaptiveTrackSelection;
+import com.google.android.exoplayer2.trackselection.DefaultTrackSelector;
+import com.google.android.exoplayer2.trackselection.MappingTrackSelector.MappedTrackInfo;
+import com.google.android.exoplayer2.trackselection.TrackSelectionArray;
+import com.google.android.exoplayer2.upstream.DataSource;
+import com.google.android.exoplayer2.upstream.DefaultDataSourceFactory;
+import com.google.android.exoplayer2.upstream.DefaultHttpDataSourceFactory;
+import com.google.android.exoplayer2.util.EventLogger;
+import com.google.android.exoplayer2.util.Util;
+
+/** An activity that plays media using {@link SimpleExoPlayer}. */
+public class PlayerActivity extends GvrPlayerActivity implements PlaybackPreparer {
+
+  public static final String EXTENSION_EXTRA = "extension";
+
+  public static final String SPHERICAL_STEREO_MODE_EXTRA = "spherical_stereo_mode";
+  public static final String SPHERICAL_STEREO_MODE_MONO = "mono";
+  public static final String SPHERICAL_STEREO_MODE_TOP_BOTTOM = "top_bottom";
+  public static final String SPHERICAL_STEREO_MODE_LEFT_RIGHT = "left_right";
+
+  private DataSource.Factory dataSourceFactory;
+  private SimpleExoPlayer player;
+  private MediaSource mediaSource;
+  private DefaultTrackSelector trackSelector;
+  private TrackGroupArray lastSeenTrackGroupArray;
+
+  private boolean startAutoPlay;
+  private int startWindow;
+  private long startPosition;
+
+  // Activity lifecycle
+
+  @Override
+  public void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    String userAgent = Util.getUserAgent(this, "ExoPlayerDemo");
+    dataSourceFactory =
+        new DefaultDataSourceFactory(this, new DefaultHttpDataSourceFactory(userAgent));
+
+    String sphericalStereoMode = getIntent().getStringExtra(SPHERICAL_STEREO_MODE_EXTRA);
+    if (sphericalStereoMode != null) {
+      int stereoMode;
+      if (SPHERICAL_STEREO_MODE_MONO.equals(sphericalStereoMode)) {
+        stereoMode = C.STEREO_MODE_MONO;
+      } else if (SPHERICAL_STEREO_MODE_TOP_BOTTOM.equals(sphericalStereoMode)) {
+        stereoMode = C.STEREO_MODE_TOP_BOTTOM;
+      } else if (SPHERICAL_STEREO_MODE_LEFT_RIGHT.equals(sphericalStereoMode)) {
+        stereoMode = C.STEREO_MODE_LEFT_RIGHT;
+      } else {
+        showToast(R.string.error_unrecognized_stereo_mode);
+        finish();
+        return;
+      }
+      setDefaultStereoMode(stereoMode);
+    }
+
+    clearStartPosition();
+  }
+
+  @Override
+  public void onResume() {
+    super.onResume();
+    if (Util.SDK_INT <= 23 || player == null) {
+      initializePlayer();
+    }
+  }
+
+  @Override
+  public void onPause() {
+    super.onPause();
+    if (Util.SDK_INT <= 23) {
+      releasePlayer();
+    }
+  }
+
+  @Override
+  public void onDestroy() {
+    super.onDestroy();
+  }
+
+  // PlaybackControlView.PlaybackPreparer implementation
+
+  @Override
+  public void preparePlayback() {
+    initializePlayer();
+  }
+
+  // Internal methods
+
+  private void initializePlayer() {
+    if (player == null) {
+      Intent intent = getIntent();
+      Uri uri = intent.getData();
+      if (!Util.checkCleartextTrafficPermitted(uri)) {
+        showToast(R.string.error_cleartext_not_permitted);
+        return;
+      }
+
+      DefaultRenderersFactory renderersFactory = new DefaultRenderersFactory(this);
+
+      trackSelector = new DefaultTrackSelector(new AdaptiveTrackSelection.Factory());
+      lastSeenTrackGroupArray = null;
+
+      player =
+          ExoPlayerFactory.newSimpleInstance(/* context= */ this, renderersFactory, trackSelector);
+      player.addListener(new PlayerEventListener());
+      player.setPlayWhenReady(startAutoPlay);
+      player.addAnalyticsListener(new EventLogger(trackSelector));
+      setPlayer(player);
+
+      mediaSource = buildMediaSource(uri, intent.getStringExtra(EXTENSION_EXTRA));
+    }
+    boolean haveStartPosition = startWindow != C.INDEX_UNSET;
+    if (haveStartPosition) {
+      player.seekTo(startWindow, startPosition);
+    }
+    player.prepare(mediaSource, !haveStartPosition, false);
+  }
+
+  private MediaSource buildMediaSource(Uri uri, @Nullable String overrideExtension) {
+    @ContentType int type = Util.inferContentType(uri, overrideExtension);
+    switch (type) {
+      case C.TYPE_DASH:
+        return new DashMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
+      case C.TYPE_SS:
+        return new SsMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
+      case C.TYPE_HLS:
+        return new HlsMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
+      case C.TYPE_OTHER:
+        return new ProgressiveMediaSource.Factory(dataSourceFactory).createMediaSource(uri);
+      default:
+        throw new IllegalStateException("Unsupported type: " + type);
+    }
+  }
+
+  private void releasePlayer() {
+    if (player != null) {
+      updateStartPosition();
+      player.release();
+      player = null;
+      mediaSource = null;
+      trackSelector = null;
+    }
+  }
+
+  private void updateStartPosition() {
+    if (player != null) {
+      startAutoPlay = player.getPlayWhenReady();
+      startWindow = player.getCurrentWindowIndex();
+      startPosition = Math.max(0, player.getContentPosition());
+    }
+  }
+
+  private void clearStartPosition() {
+    startAutoPlay = true;
+    startWindow = C.INDEX_UNSET;
+    startPosition = C.TIME_UNSET;
+  }
+
+  private void showToast(int messageId) {
+    showToast(getString(messageId));
+  }
+
+  private void showToast(String message) {
+    Toast.makeText(getApplicationContext(), message, Toast.LENGTH_LONG).show();
+  }
+
+  private class PlayerEventListener implements Player.EventListener {
+
+    @Override
+    public void onPlayerStateChanged(boolean playWhenReady, int playbackState) {}
+
+    @Override
+    public void onPositionDiscontinuity(@Player.DiscontinuityReason int reason) {
+      if (player.getPlaybackError() != null) {
+        // The user has performed a seek whilst in the error state. Update the resume position so
+        // that if the user then retries, playback resumes from the position to which they seeked.
+        updateStartPosition();
+      }
+    }
+
+    @Override
+    public void onPlayerError(ExoPlaybackException e) {
+      updateStartPosition();
+    }
+
+    @Override
+    @SuppressWarnings("ReferenceEquality")
+    public void onTracksChanged(TrackGroupArray trackGroups, TrackSelectionArray trackSelections) {
+      if (trackGroups != lastSeenTrackGroupArray) {
+        MappedTrackInfo mappedTrackInfo = trackSelector.getCurrentMappedTrackInfo();
+        if (mappedTrackInfo != null) {
+          if (mappedTrackInfo.getTypeSupport(C.TRACK_TYPE_VIDEO)
+              == MappedTrackInfo.RENDERER_SUPPORT_UNSUPPORTED_TRACKS) {
+            showToast(R.string.error_unsupported_video);
+          }
+          if (mappedTrackInfo.getTypeSupport(C.TRACK_TYPE_AUDIO)
+              == MappedTrackInfo.RENDERER_SUPPORT_UNSUPPORTED_TRACKS) {
+            showToast(R.string.error_unsupported_audio);
+          }
+        }
+        lastSeenTrackGroupArray = trackGroups;
+      }
+    }
+  }
+}

demos/gvr/src/main/java/com/google/android/exoplayer2/gvrdemo/SampleChooserActivity.java

+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.google.android.exoplayer2.gvrdemo;
+
+import static com.google.android.exoplayer2.gvrdemo.PlayerActivity.SPHERICAL_STEREO_MODE_LEFT_RIGHT;
+import static com.google.android.exoplayer2.gvrdemo.PlayerActivity.SPHERICAL_STEREO_MODE_MONO;
+import static com.google.android.exoplayer2.gvrdemo.PlayerActivity.SPHERICAL_STEREO_MODE_TOP_BOTTOM;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import android.widget.ArrayAdapter;
+import android.widget.ListView;
+
+/** An activity for selecting from a list of media samples. */
+public class SampleChooserActivity extends Activity {
+
+  private final Sample[] samples =
+      new Sample[] {
+        new Sample(
+            "Congo (360 top-bottom stereo)",
+            "https://storage.googleapis.com/exoplayer-test-media-1/360/congo.mp4",
+            SPHERICAL_STEREO_MODE_TOP_BOTTOM),
+        new Sample(
+            "Sphericalv2 (180 top-bottom stereo)",
+            "https://storage.googleapis.com/exoplayer-test-media-1/360/sphericalv2.mp4",
+            SPHERICAL_STEREO_MODE_TOP_BOTTOM),
+        new Sample(
+            "Iceland (360 top-bottom stereo ts)",
+            "https://storage.googleapis.com/exoplayer-test-media-1/360/iceland0.ts",
+            SPHERICAL_STEREO_MODE_TOP_BOTTOM),
+        new Sample(
+            "Camera motion metadata test",
+            "https://storage.googleapis.com/exoplayer-test-media-internal-"
+                + "63834241aced7884c2544af1a3452e01/vr180/synthetic_with_camm.mp4",
+            SPHERICAL_STEREO_MODE_TOP_BOTTOM),
+        new Sample(
+            "actual_camera_cat",
+            "https://storage.googleapis.com/exoplayer-test-media-internal-"
+                + "63834241aced7884c2544af1a3452e01/vr180/actual_camera_cat.mp4",
+            SPHERICAL_STEREO_MODE_TOP_BOTTOM),
+        new Sample(
+            "johnny_stitched",
+            "https://storage.googleapis.com/exoplayer-test-media-internal-"
+                + "63834241aced7884c2544af1a3452e01/vr180/johnny_stitched.mp4",
+            SPHERICAL_STEREO_MODE_TOP_BOTTOM),
+        new Sample(
+            "lenovo_birds.vr",
+            "https://storage.googleapis.com/exoplayer-test-media-internal-"
+                + "63834241aced7884c2544af1a3452e01/vr180/lenovo_birds.vr.mp4",
+            SPHERICAL_STEREO_MODE_TOP_BOTTOM),
+        new Sample(
+            "mono_v1_sample",
+            "https://storage.googleapis.com/exoplayer-test-media-internal-"
+                + "63834241aced7884c2544af1a3452e01/vr180/mono_v1_sample.mp4",
+            SPHERICAL_STEREO_MODE_MONO),
+        new Sample(
+            "not_vr180_actually_shot_with_moto_mod",
+            "https://storage.googleapis.com/exoplayer-test-media-internal-"
+                + "63834241aced7884c2544af1a3452e01/vr180/"
+                + "not_vr180_actually_shot_with_moto_mod.mp4",
+            SPHERICAL_STEREO_MODE_TOP_BOTTOM),
+        new Sample(
+            "stereo_v1_sample",
+            "https://storage.googleapis.com/exoplayer-test-media-internal-"
+                + "63834241aced7884c2544af1a3452e01/vr180/stereo_v1_sample.mp4",
+            SPHERICAL_STEREO_MODE_TOP_BOTTOM),
+        new Sample(
+            "yi_giraffes.vr",
+            "https://storage.googleapis.com/exoplayer-test-media-internal-"
+                + "63834241aced7884c2544af1a3452e01/vr180/yi_giraffes.vr.mp4",
+            SPHERICAL_STEREO_MODE_TOP_BOTTOM),
+      };
+
+  @Override
+  public void onCreate(Bundle savedInstanceState) {
+    super.onCreate(savedInstanceState);
+    setContentView(R.layout.sample_chooser_activity);
+    ListView sampleListView = findViewById(R.id.sample_list);
+    sampleListView.setAdapter(
+        new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, samples));
+    sampleListView.setOnItemClickListener(
+        (parent, view, position, id) ->
+            startActivity(
+                samples[position].buildIntent(/* context= */ SampleChooserActivity.this)));
+  }
+
+  private static final class Sample {
+    public final String name;
+    public final String uri;
+    public final String extension;
+    public final String sphericalStereoMode;
+
+    public Sample(String name, String uri, String sphericalStereoMode) {
+      this(name, uri, sphericalStereoMode, null);
+    }
+
+    public Sample(String name, String uri, String sphericalStereoMode, String extension) {
+      this.name = name;
+      this.uri = uri;
+      this.extension = extension;
+      this.sphericalStereoMode = sphericalStereoMode;
+    }
+
+    public Intent buildIntent(Context context) {
+      Intent intent = new Intent(context, PlayerActivity.class);
+      return intent
+          .setData(Uri.parse(uri))
+          .putExtra(PlayerActivity.EXTENSION_EXTRA, extension)
+          .putExtra(PlayerActivity.SPHERICAL_STEREO_MODE_EXTRA, sphericalStereoMode);
+    }
+
+    @Override
+    public String toString() {
+      return name;
+    }
+  }
+}

demos/gvr/src/main/res/layout/sample_chooser_activity.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Copyright (C) 2016 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+  <ListView android:id="@+id/sample_list"
+      android:layout_width="match_parent"
+      android:layout_height="match_parent"/>
+
+</LinearLayout>

demos/gvr/src/main/res/values/strings.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+
+  <string name="application_name">ExoPlayer VR Demo</string>
+
+  <string name="error_cleartext_not_permitted">Cleartext traffic not permitted</string>
+
+  <string name="error_unrecognized_stereo_mode">Unrecognized stereo mode</string>
+
+  <string name="error_unsupported_video">Media includes video tracks, but none are playable by this device</string>
+
+  <string name="error_unsupported_audio">Media includes audio tracks, but none are playable by this device</string>
+
+</resources>

extensions/gvr/src/main/java/com/google/android/exoplayer2/ext/gvr/GvrPlayerActivity.java

@@ -50,7 +50,10 @@ import com.google.vr.sdk.controller.ControllerManager;
 import javax.microedition.khronos.egl.EGLConfig;
 import javax.microedition.khronos.egl.EGLConfig;
 import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
 
-/** Base activity for VR 360 video playback. */
+/**
+ * Base activity for VR 360 video playback. Before starting the video playback a player needs to be
+ * set using {@link #setPlayer(Player)}.
+ */
 public abstract class GvrPlayerActivity extends GvrActivity {
 public abstract class GvrPlayerActivity extends GvrActivity {
 
 
   private static final int EXIT_FROM_VR_REQUEST_CODE = 42;
   private static final int EXIT_FROM_VR_REQUEST_CODE = 42;

settings.gradle

@@ -21,10 +21,12 @@ if (gradle.ext.has('exoplayerModulePrefix')) {
 include modulePrefix + 'demo'
 include modulePrefix + 'demo'
 include modulePrefix + 'demo-cast'
 include modulePrefix + 'demo-cast'
 include modulePrefix + 'demo-ima'
 include modulePrefix + 'demo-ima'
+include modulePrefix + 'demo-gvr'
 include modulePrefix + 'playbacktests'
 include modulePrefix + 'playbacktests'
 project(modulePrefix + 'demo').projectDir = new File(rootDir, 'demos/main')
 project(modulePrefix + 'demo').projectDir = new File(rootDir, 'demos/main')
 project(modulePrefix + 'demo-cast').projectDir = new File(rootDir, 'demos/cast')
 project(modulePrefix + 'demo-cast').projectDir = new File(rootDir, 'demos/cast')
 project(modulePrefix + 'demo-ima').projectDir = new File(rootDir, 'demos/ima')
 project(modulePrefix + 'demo-ima').projectDir = new File(rootDir, 'demos/ima')
+project(modulePrefix + 'demo-gvr').projectDir = new File(rootDir, 'demos/gvr')
 project(modulePrefix + 'playbacktests').projectDir = new File(rootDir, 'playbacktests')
 project(modulePrefix + 'playbacktests').projectDir = new File(rootDir, 'playbacktests')
 
 
 apply from: 'core_settings.gradle'
 apply from: 'core_settings.gradle'