diff --git a/extensions/gvr/src/main/java/com/google/android/exoplayer2/ext/gvr/GvrPlayerActivity.java b/extensions/gvr/src/main/java/com/google/android/exoplayer2/ext/gvr/GvrPlayerActivity.java
index 46cb423aa6..0462f39050 100644
--- a/extensions/gvr/src/main/java/com/google/android/exoplayer2/ext/gvr/GvrPlayerActivity.java
+++ b/extensions/gvr/src/main/java/com/google/android/exoplayer2/ext/gvr/GvrPlayerActivity.java
@@ -68,6 +68,8 @@ public abstract class GvrPlayerActivity extends GvrActivity {
     mainHandler = new Handler(Looper.getMainLooper());
   }
 
+  // TODO(b/124903498): Incompatible parameter type for savedInstanceState.
+  @SuppressWarnings("nullness:override.param.invalid")
   @Override
   protected void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/drm/DrmInitData.java b/library/core/src/main/java/com/google/android/exoplayer2/drm/DrmInitData.java
index 7402396042..af2bd057b5 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/drm/DrmInitData.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/drm/DrmInitData.java
@@ -136,7 +136,10 @@ public final class DrmInitData implements Comparator<SchemeData>, Parcelable {
     Arrays.sort(this.schemeDatas, this);
   }
 
-  /* package */ DrmInitData(Parcel in) {
+  /* package */
+  // TODO(b/124903498): incompatible types in assignment.
+  @SuppressWarnings("nullness:assignment.type.incompatible")
+  DrmInitData(Parcel in) {
     schemeType = in.readString();
     schemeDatas = in.createTypedArray(SchemeData.CREATOR);
     schemeDataCount = schemeDatas.length;
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/ChapterTocFrame.java b/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/ChapterTocFrame.java
index 98688ad098..2184e4f9ec 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/ChapterTocFrame.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/ChapterTocFrame.java
@@ -45,7 +45,10 @@ public final class ChapterTocFrame extends Id3Frame {
     this.subFrames = subFrames;
   }
 
-  /* package */ ChapterTocFrame(Parcel in) {
+  /* package */
+  // TODO(b/124903498): incompatible types in assignment.
+  @SuppressWarnings("nullness:assignment.type.incompatible")
+  ChapterTocFrame(Parcel in) {
     super(ID);
     this.elementId = castNonNull(in.readString());
     this.isRoot = in.readByte() != 0;
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/MlltFrame.java b/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/MlltFrame.java
index 7d0a1dba31..df41ce863f 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/MlltFrame.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/MlltFrame.java
@@ -44,7 +44,10 @@ public final class MlltFrame extends Id3Frame {
     this.millisecondsDeviations = millisecondsDeviations;
   }
 
-  /* package */ MlltFrame(Parcel in) {
+  /* package */
+  // TODO(b/124903498): incompatible types in assignment.
+  @SuppressWarnings("nullness:assignment.type.incompatible")
+  MlltFrame(Parcel in) {
     super(ID);
     this.mpegFramesBetweenReference = in.readInt();
     this.bytesBetweenReference = in.readInt();
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadHelper.java b/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadHelper.java
index bc19b886a0..fe58323dad 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadHelper.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/offline/DownloadHelper.java
@@ -363,6 +363,8 @@ public final class DownloadHelper {
    *     Looper}, in which case it will be called on the application's main thread.
    * @throws IllegalStateException If the download helper has already been prepared.
    */
+  // TODO(b/124903498): incompatible types in argument.
+  @SuppressWarnings("nullness:argument.type.incompatible")
   public void prepare(Callback callback) {
     Assertions.checkState(this.callback == null);
     this.callback = callback;
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java
index 601de5fe3e..aa122f3082 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java
@@ -888,7 +888,10 @@ public class DefaultTrackSelector extends MappingTrackSelector {
       this.rendererDisabledFlags = rendererDisabledFlags;
     }
 
-    /* package */ Parameters(Parcel in) {
+    /* package */
+    // TODO(b/124903498): incompatible types in assignment.
+    @SuppressWarnings("nullness:assignment.type.incompatible")
+    Parameters(Parcel in) {
       super(in);
       // Video
       this.maxVideoWidth = in.readInt();
diff --git a/library/core/src/main/java/com/google/android/exoplayer2/util/Util.java b/library/core/src/main/java/com/google/android/exoplayer2/util/Util.java
index 5a2732a05d..c0f83674e3 100644
--- a/library/core/src/main/java/com/google/android/exoplayer2/util/Util.java
+++ b/library/core/src/main/java/com/google/android/exoplayer2/util/Util.java
@@ -162,6 +162,8 @@ public final class Util {
    * @param intent The intent to pass to the called method.
    * @return The result of the called method.
    */
+  // TODO(b/124903498): incompatible types in return.
+  @SuppressWarnings("nullness:return.type.incompatible")
   public static ComponentName startForegroundService(Context context, Intent intent) {
     if (Util.SDK_INT >= 26) {
       return context.startForegroundService(intent);
diff --git a/library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerNotificationManager.java b/library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerNotificationManager.java
index 809c76f19a..cd232a21db 100644
--- a/library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerNotificationManager.java
+++ b/library/ui/src/main/java/com/google/android/exoplayer2/ui/PlayerNotificationManager.java
@@ -1265,6 +1265,8 @@ public class PlayerNotificationManager {
 
   private class NotificationBroadcastReceiver extends BroadcastReceiver {
 
+    // TODO(b/124903498): incompatible types in argument.
+    @SuppressWarnings("nullness:argument.type.incompatible")
     @Override
     public void onReceive(Context context, Intent intent) {
       Player player = PlayerNotificationManager.this.player;