diff --git a/extensions/mediasession/src/main/java/com/google/android/exoplayer2/ext/mediasession/MediaSessionConnector.java b/extensions/mediasession/src/main/java/com/google/android/exoplayer2/ext/mediasession/MediaSessionConnector.java
index 8def61aead..baf5154e6c 100644
--- a/extensions/mediasession/src/main/java/com/google/android/exoplayer2/ext/mediasession/MediaSessionConnector.java
+++ b/extensions/mediasession/src/main/java/com/google/android/exoplayer2/ext/mediasession/MediaSessionConnector.java
@@ -647,6 +647,8 @@ public final class MediaSessionConnector {
    * @param customActionProviders The custom action providers, or null to remove all existing custom
    *     action providers.
    */
+  // incompatible types in assignment.
+  @SuppressWarnings("nullness:assignment.type.incompatible")
   public void setCustomActionProviders(@Nullable CustomActionProvider... customActionProviders) {
     this.customActionProviders =
         customActionProviders == null ? new CustomActionProvider[0] : customActionProviders;
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/audio/ChannelMappingAudioProcessor.java b/library/core/src/main/java/com/google/android/exoplayer2/audio/ChannelMappingAudioProcessor.java
index ea155323bb..6b84662093 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/audio/ChannelMappingAudioProcessor.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/audio/ChannelMappingAudioProcessor.java
@@ -25,7 +25,10 @@ import java.util.Arrays;
  * An {@link AudioProcessor} that applies a mapping from input channels onto specified output
  * channels. This can be used to reorder, duplicate or discard channels.
  */
-/* package */ final class ChannelMappingAudioProcessor extends BaseAudioProcessor {
+/* package */
+// the constructor does not initialize fields: pendingOutputChannels, outputChannels
+@SuppressWarnings("nullness:initialization.fields.uninitialized")
+final class ChannelMappingAudioProcessor extends BaseAudioProcessor {
 
   @Nullable private int[] pendingOutputChannels;
 
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java b/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
index 06aea69035..f9606d591e 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSessionManager.java
@@ -326,6 +326,8 @@ public class DefaultDrmSessionManager<T extends ExoMediaCrypto>
         new DefaultLoadErrorHandlingPolicy(initialDrmRequestRetryCount));
   }
 
+  // the constructor does not initialize fields: offlineLicenseKeySetId
+  @SuppressWarnings("nullness:initialization.fields.uninitialized")
   private DefaultDrmSessionManager(
       UUID uuid,
       ExoMediaDrm.Provider<T> exoMediaDrmProvider,
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/extractor/mp4/Track.java b/library/core/src/main/java/com/google/android/exoplayer2/extractor/mp4/Track.java
index 7676926c4d..0a21ddd3a3 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/extractor/mp4/Track.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/extractor/mp4/Track.java
@@ -129,6 +129,8 @@ public final class Track {
         : sampleDescriptionEncryptionBoxes[sampleDescriptionIndex];
   }
 
+  // incompatible types in argument.
+  @SuppressWarnings("nullness:argument.type.incompatible")
   public Track copyWithFormat(Format format) {
     return new Track(
         id,
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java b/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java
index 07836672e5..9adb6bc7bc 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/mediacodec/MediaCodecUtil.java
@@ -943,6 +943,8 @@ public final class MediaCodecUtil {
 
     @Nullable private android.media.MediaCodecInfo[] mediaCodecInfos;
 
+    // the constructor does not initialize fields: mediaCodecInfos
+    @SuppressWarnings("nullness:initialization.fields.uninitialized")
     public MediaCodecListCompatV21(boolean includeSecure, boolean includeTunneling) {
       codecKind =
           includeSecure || includeTunneling
@@ -956,6 +958,8 @@ public final class MediaCodecUtil {
       return mediaCodecInfos.length;
     }
 
+    // incompatible types in return.
+    @SuppressWarnings("nullness:return.type.incompatible")
     @Override
     public android.media.MediaCodecInfo getCodecInfoAt(int index) {
       ensureMediaCodecInfosInitialized();
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/offline/DefaultDownloadIndex.java b/library/core/src/main/java/com/google/android/exoplayer2/offline/DefaultDownloadIndex.java
index ef4bd00f20..4517e4ee9a 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/offline/DefaultDownloadIndex.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/offline/DefaultDownloadIndex.java
@@ -302,6 +302,8 @@ public final class DefaultDownloadIndex implements WritableDownloadIndex {
     }
   }
 
+  // incompatible types in argument.
+  @SuppressWarnings("nullness:argument.type.incompatible")
   private Cursor getCursor(String selection, @Nullable String[] selectionArgs)
       throws DatabaseIOException {
     try {
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/source/SingleSampleMediaPeriod.java b/library/core/src/main/java/com/google/android/exoplayer2/source/SingleSampleMediaPeriod.java
index a5d8266ef6..ca50c342b5 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/source/SingleSampleMediaPeriod.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/source/SingleSampleMediaPeriod.java
@@ -383,6 +383,8 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
     @Nullable private byte[] sampleData;
 
+    // the constructor does not initialize fields: sampleData
+    @SuppressWarnings("nullness:initialization.fields.uninitialized")
     public SourceLoadable(DataSpec dataSpec, DataSource dataSource) {
       this.dataSpec = dataSpec;
       this.dataSource = new StatsDataSource(dataSource);
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java
index eae21b5b30..041435482c 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/AdaptiveTrackSelection.java
@@ -609,13 +609,18 @@ public class AdaptiveTrackSelection extends BaseTrackSelection {
 
     @Nullable private long[][] allocationCheckpoints;
 
-    /* package */ DefaultBandwidthProvider(
+    /* package */
+    // the constructor does not initialize fields: allocationCheckpoints
+    @SuppressWarnings("nullness:initialization.fields.uninitialized")
+    DefaultBandwidthProvider(
         BandwidthMeter bandwidthMeter, float bandwidthFraction, long reservedBandwidth) {
       this.bandwidthMeter = bandwidthMeter;
       this.bandwidthFraction = bandwidthFraction;
       this.reservedBandwidth = reservedBandwidth;
     }
 
+    // unboxing a possibly-null reference allocationCheckpoints[nextIndex][0]
+    @SuppressWarnings("nullness:unboxing.of.nullable")
     @Override
     public long getAllocatedBandwidth() {
       long totalBandwidth = (long) (bandwidthMeter.getBitrateEstimate() * bandwidthFraction);
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/upstream/DataSchemeDataSource.java b/library/core/src/main/java/com/google/android/exoplayer2/upstream/DataSchemeDataSource.java
index 55c580ead2..e592c3bec3 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/upstream/DataSchemeDataSource.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/upstream/DataSchemeDataSource.java
@@ -36,6 +36,8 @@ public final class DataSchemeDataSource extends BaseDataSource {
   private int endPosition;
   private int readPosition;
 
+  // the constructor does not initialize fields: data
+  @SuppressWarnings("nullness:initialization.fields.uninitialized")
   public DataSchemeDataSource() {
     super(/* isNetwork= */ false);
   }
diff --git a/library/ui/src/main/java/com/google/android/exoplayer2/ui/spherical/SceneRenderer.java b/library/ui/src/main/java/com/google/android/exoplayer2/ui/spherical/SceneRenderer.java
index 5080e86345..01fa6837ea 100644
--- a/library/ui/src/main/java/com/google/android/exoplayer2/ui/spherical/SceneRenderer.java
+++ b/library/ui/src/main/java/com/google/android/exoplayer2/ui/spherical/SceneRenderer.java
@@ -60,6 +60,8 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
   // Methods called on any thread.
 
+  // the constructor does not initialize fields: lastProjectionData
+  @SuppressWarnings("nullness:initialization.fields.uninitialized")
   public SceneRenderer() {
     frameAvailable = new AtomicBoolean();
     resetRotationAtNextFrame = new AtomicBoolean(true);