Fix a bunch of misc analysis warnings

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=209758330

javadoc_combined.gradle

@@ -39,7 +39,7 @@ class CombinedJavadocPlugin implements Plugin<Project> {
             libraryModules.each { libraryModule ->
               libraryModule.android.libraryVariants.all { variant ->
                 def name = variant.buildType.name
-                if (name.equals("release")) {
+                if (name == "release") {
                   classpath +=
                       libraryModule.project.files(
                           variant.javaCompile.classpath.files,
@@ -63,7 +63,7 @@ class CombinedJavadocPlugin implements Plugin<Project> {
   }
 
   // Returns Android library modules that declare a generateJavadoc task.
-  private Set<Project> getLibraryModules(Project project) {
+  private static Set<Project> getLibraryModules(Project project) {
     project.subprojects.findAll {
       it.plugins.findPlugin("com.android.library") &&
       it.tasks.findByName("generateJavadoc")

library/core/src/main/java/com/google/android/exoplayer2/C.java

@@ -418,6 +418,7 @@ private C() {}
   /** Indicates that a buffer is (at least partially) encrypted. */
   public static final int BUFFER_FLAG_ENCRYPTED = 1 << 30; // 0x40000000
   /** Indicates that a buffer should be decoded but not rendered. */
+  @SuppressWarnings("NumericOverflow")
   public static final int BUFFER_FLAG_DECODE_ONLY = 1 << 31; // 0x80000000
 
   /**

library/core/src/main/java/com/google/android/exoplayer2/Player.java

@@ -424,12 +424,10 @@ public void onTimelineChanged(Timeline timeline, @Nullable Object manifest) {
    */
   int STATE_ENDED = 4;
 
-  /**
-   * Repeat modes for playback.
-   */
+  /** Repeat modes for playback. */
   @Retention(RetentionPolicy.SOURCE)
   @IntDef({REPEAT_MODE_OFF, REPEAT_MODE_ONE, REPEAT_MODE_ALL})
-  public @interface RepeatMode {}
+  @interface RepeatMode {}
   /**
    * Normal playback without repetition.
    */
@@ -452,7 +450,7 @@ public void onTimelineChanged(Timeline timeline, @Nullable Object manifest) {
     DISCONTINUITY_REASON_AD_INSERTION,
     DISCONTINUITY_REASON_INTERNAL
   })
-  public @interface DiscontinuityReason {}
+  @interface DiscontinuityReason {}
   /**
    * Automatic playback transition from one period in the timeline to the next. The period index may
    * be the same as it was before the discontinuity in case the current period is repeated.
@@ -470,13 +468,14 @@ public void onTimelineChanged(Timeline timeline, @Nullable Object manifest) {
   /** Discontinuity introduced internally by the source. */
   int DISCONTINUITY_REASON_INTERNAL = 4;
 
-  /**
-   * Reasons for timeline and/or manifest changes.
-   */
+  /** Reasons for timeline and/or manifest changes. */
   @Retention(RetentionPolicy.SOURCE)
-  @IntDef({TIMELINE_CHANGE_REASON_PREPARED, TIMELINE_CHANGE_REASON_RESET,
-      TIMELINE_CHANGE_REASON_DYNAMIC})
-  public @interface TimelineChangeReason {}
+  @IntDef({
+    TIMELINE_CHANGE_REASON_PREPARED,
+    TIMELINE_CHANGE_REASON_RESET,
+    TIMELINE_CHANGE_REASON_DYNAMIC
+  })
+  @interface TimelineChangeReason {}
   /**
    * Timeline and manifest changed as a result of a player initialization with new media.
    */

library/core/src/main/java/com/google/android/exoplayer2/PlayerMessage.java

@@ -231,7 +231,7 @@ public boolean getDeleteAfterDelivery() {
    * Player.EventListener#onPlayerError(ExoPlaybackException)}.
    *
    * @return This message.
-   * @throws IllegalStateException If {@link #send()} has already been called.
+   * @throws IllegalStateException If this message has already been sent.
    */
   public PlayerMessage send() {
     Assertions.checkState(!isSent);

library/core/src/main/java/com/google/android/exoplayer2/Renderer.java

@@ -202,7 +202,7 @@ void replaceStream(Format[] formats, SampleStream stream, long offsetUs)
    * @param operatingRate The operating rate.
    * @throws ExoPlaybackException If an error occurs handling the operating rate.
    */
-  default void setOperatingRate(float operatingRate) throws ExoPlaybackException {};
+  default void setOperatingRate(float operatingRate) throws ExoPlaybackException {}
 
   /**
    * Incrementally renders the {@link SampleStream}.

library/core/src/main/java/com/google/android/exoplayer2/drm/DrmSession.java

@@ -39,12 +39,10 @@ public DrmSessionException(Throwable cause) {
 
   }
 
-  /**
-   * The state of the DRM session.
-   */
+  /** The state of the DRM session. */
   @Retention(RetentionPolicy.SOURCE)
   @IntDef({STATE_RELEASED, STATE_ERROR, STATE_OPENING, STATE_OPENED, STATE_OPENED_WITH_KEYS})
-  public @interface State {}
+  @interface State {}
   /**
    * The session has been released.
    */

library/core/src/main/java/com/google/android/exoplayer2/extractor/ts/AdtsReader.java

@@ -81,7 +81,6 @@ public final class AdtsReader implements ElementaryStreamReader {
   private int firstFrameSampleRateIndex;
 
   private int currentFrameVersion;
-  private int currentFrameSampleRateIndex;
 
   // Used when parsing the header.
   private boolean hasOutputFormat;
@@ -327,7 +326,7 @@ private void checkAdtsHeader(ParsableByteArray buffer) {
     adtsScratch.data[0] = buffer.data[buffer.getPosition()];
 
     adtsScratch.setPosition(2);
-    currentFrameSampleRateIndex = adtsScratch.readBits(4);
+    int currentFrameSampleRateIndex = adtsScratch.readBits(4);
     if (firstFrameSampleRateIndex != C.INDEX_UNSET
         && currentFrameSampleRateIndex != firstFrameSampleRateIndex) {
       // Invalid header.

library/core/src/main/java/com/google/android/exoplayer2/text/tx3g/Tx3gDecoder.java

@@ -56,8 +56,8 @@ public final class Tx3gDecoder extends SimpleSubtitleDecoder {
   private static final int FONT_FACE_ITALIC = 0x0002;
   private static final int FONT_FACE_UNDERLINE = 0x0004;
 
-  private static final int SPAN_PRIORITY_LOW = (0xFF << Spanned.SPAN_PRIORITY_SHIFT);
-  private static final int SPAN_PRIORITY_HIGH = (0x00 << Spanned.SPAN_PRIORITY_SHIFT);
+  private static final int SPAN_PRIORITY_LOW = 0xFF << Spanned.SPAN_PRIORITY_SHIFT;
+  private static final int SPAN_PRIORITY_HIGH = 0;
 
   private static final int DEFAULT_FONT_FACE = 0;
   private static final int DEFAULT_COLOR = Color.WHITE;

library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/SimpleCache.java

@@ -191,7 +191,7 @@ public synchronized NavigableSet<CacheSpan> getCachedSpans(String key) {
     Assertions.checkState(!released);
     CachedContent cachedContent = index.get(key);
     return cachedContent == null || cachedContent.isEmpty()
-        ? new TreeSet<CacheSpan>()
+        ? new TreeSet<>()
         : new TreeSet<CacheSpan>(cachedContent.getSpans());
   }
 

library/core/src/test/java/com/google/android/exoplayer2/audio/SilenceSkippingAudioProcessorTest.java

@@ -401,8 +401,8 @@ public Pcm16BitAudioBuilder(int channelCount, int frameCount) {
     public void appendFrames(int count, short... channelLevels) {
       Assertions.checkState(!built);
       for (int i = 0; i < count; i += channelCount) {
-        for (int j = 0; j < channelLevels.length; j++) {
-          buffer.put(channelLevels[j]);
+        for (short channelLevel : channelLevels) {
+          buffer.put(channelLevel);
         }
       }
     }

library/core/src/test/java/com/google/android/exoplayer2/source/MergingMediaSourceTest.java

@@ -95,15 +95,15 @@ private static void testMergingMediaSourcePrepare(Timeline... timelines) throws
     for (int i = 0; i < timelines.length; i++) {
       mediaSources[i] = new FakeMediaSource(timelines[i], null);
     }
-    MergingMediaSource mediaSource = new MergingMediaSource(mediaSources);
-    MediaSourceTestRunner testRunner = new MediaSourceTestRunner(mediaSource, null);
+    MergingMediaSource mergingMediaSource = new MergingMediaSource(mediaSources);
+    MediaSourceTestRunner testRunner = new MediaSourceTestRunner(mergingMediaSource, null);
     try {
       Timeline timeline = testRunner.prepareSource();
       // The merged timeline should always be the one from the first child.
       assertThat(timeline).isEqualTo(timelines[0]);
       testRunner.releaseSource();
-      for (int i = 0; i < mediaSources.length; i++) {
-        mediaSources[i].assertReleased();
+      for (FakeMediaSource mediaSource : mediaSources) {
+        mediaSource.assertReleased();
       }
     } finally {
       testRunner.release();

library/core/src/test/java/com/google/android/exoplayer2/upstream/cache/CachedRegionTrackerTest.java

@@ -61,8 +61,7 @@ public final class CachedRegionTrackerTest {
   @Before
   public void setUp() throws Exception {
     MockitoAnnotations.initMocks(this);
-    when(cache.addListener(anyString(), any(Cache.Listener.class)))
-        .thenReturn(new TreeSet<CacheSpan>());
+    when(cache.addListener(anyString(), any(Cache.Listener.class))).thenReturn(new TreeSet<>());
     tracker = new CachedRegionTracker(cache, CACHE_KEY, CHUNK_INDEX);
     cacheDir = Util.createTempDirectory(RuntimeEnvironment.application, "ExoPlayerTest");
     index = new CachedContentIndex(cacheDir);

library/hls/src/test/java/com/google/android/exoplayer2/source/hls/offline/HlsDownloaderTest.java

@@ -191,8 +191,7 @@ private HlsDownloader getHlsDownloader(String mediaPlaylistUri, List<StreamKey>
   private static ArrayList<StreamKey> getKeys(int... variantIndices) {
     ArrayList<StreamKey> streamKeys = new ArrayList<>();
     for (int variantIndex : variantIndices) {
-      final int trackIndex = variantIndex;
-      streamKeys.add(new StreamKey(HlsMasterPlaylist.GROUP_INDEX_VARIANT, trackIndex));
+      streamKeys.add(new StreamKey(HlsMasterPlaylist.GROUP_INDEX_VARIANT, variantIndex));
     }
     return streamKeys;
   }

library/smoothstreaming/src/main/java/com/google/android/exoplayer2/source/smoothstreaming/manifest/SsManifestParser.java

@@ -213,7 +213,7 @@ protected boolean handleChildInline(String tagName) {
 
     /**
      * @param xmlParser The underlying {@link XmlPullParser}
-     * @throws ParserException
+     * @throws ParserException If a parsing error occurs.
      */
     protected void parseStartTag(XmlPullParser xmlParser) throws ParserException {
       // Do nothing.

library/smoothstreaming/src/test/java/com/google/android/exoplayer2/source/smoothstreaming/manifest/SsManifestTest.java

@@ -64,9 +64,7 @@ public void testCopyRemoveStreamElement() throws Exception {
     SsManifest sourceManifest =
         newSsManifest(newStreamElement("1", formats[0]), newStreamElement("2", formats[1]));
 
-    List<StreamKey> keys = Arrays.asList(new StreamKey(1, 0));
-    // Keys don't need to be in any particular order
-    Collections.shuffle(keys, new Random(0));
+    List<StreamKey> keys = Collections.singletonList(new StreamKey(1, 0));
 
     SsManifest copyManifest = sourceManifest.copy(keys);
 

library/ui/src/main/res/layout/exo_playback_control_view.xml

@@ -14,12 +14,14 @@
      limitations under the License.
 -->
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+  xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_gravity="bottom"
   android:layoutDirection="ltr"
   android:background="#CC000000"
-  android:orientation="vertical">
+  android:orientation="vertical"
+  tools:targetApi="28">
 
   <LinearLayout
     android:layout_width="match_parent"

testutils_robolectric/src/main/java/com/google/android/exoplayer2/testutil/TestDownloadManagerListener.java

@@ -95,7 +95,7 @@ public void blockUntilTasksCompleteAndThrowAnyDownloadError() throws Throwable {
   private ArrayBlockingQueue<Integer> getStateQueue(DownloadAction action) {
     synchronized (actionStates) {
       if (!actionStates.containsKey(action)) {
-        actionStates.put(action, new ArrayBlockingQueue<Integer>(10));
+        actionStates.put(action, new ArrayBlockingQueue<>(10));
       }
       return actionStates.get(action);
     }