diff --git a/libraries/common/src/main/java/androidx/media3/common/util/Util.java b/libraries/common/src/main/java/androidx/media3/common/util/Util.java
index 08dd27056e..09f8fca8c7 100644
--- a/libraries/common/src/main/java/androidx/media3/common/util/Util.java
+++ b/libraries/common/src/main/java/androidx/media3/common/util/Util.java
@@ -523,7 +523,7 @@ public final class Util {
    * <p>This implements {@code SparseArray#contains} for lower API versions.
    */
   @UnstableApi
-  public static <T> boolean containsKey(SparseArray<T> sparseArray, int key) {
+  public static <T> boolean contains(SparseArray<T> sparseArray, int key) {
     return sparseArray.indexOfKey(key) >= 0;
   }
 
diff --git a/libraries/effect/src/main/java/androidx/media3/effect/InputSwitcher.java b/libraries/effect/src/main/java/androidx/media3/effect/InputSwitcher.java
index 742dc952b4..0f1bf28a1e 100644
--- a/libraries/effect/src/main/java/androidx/media3/effect/InputSwitcher.java
+++ b/libraries/effect/src/main/java/androidx/media3/effect/InputSwitcher.java
@@ -23,7 +23,7 @@ import static androidx.media3.common.VideoFrameProcessor.INPUT_TYPE_TEXTURE_ID;
 import static androidx.media3.common.util.Assertions.checkNotNull;
 import static androidx.media3.common.util.Assertions.checkState;
 import static androidx.media3.common.util.Assertions.checkStateNotNull;
-import static androidx.media3.common.util.Util.containsKey;
+import static androidx.media3.common.util.Util.contains;
 
 import android.content.Context;
 import android.util.SparseArray;
@@ -169,7 +169,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
   public void switchToInput(
       @VideoFrameProcessor.InputType int newInputType, FrameInfo inputFrameInfo) {
     checkStateNotNull(downstreamShaderProgram);
-    checkState(containsKey(inputs, newInputType), "Input type not registered: " + newInputType);
+    checkState(contains(inputs, newInputType), "Input type not registered: " + newInputType);
 
     for (int i = 0; i < inputs.size(); i++) {
       @VideoFrameProcessor.InputType int inputType = inputs.keyAt(i);
@@ -223,7 +223,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
    *     {@linkplain #registerInput registered}.
    */
   public Surface getInputSurface() {
-    checkState(containsKey(inputs, INPUT_TYPE_SURFACE));
+    checkState(contains(inputs, INPUT_TYPE_SURFACE));
     return inputs.get(INPUT_TYPE_SURFACE).textureManager.getInputSurface();
   }
 
@@ -234,7 +234,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
    *     {@linkplain #registerInput registered}.
    */
   public void setInputDefaultBufferSize(int width, int height) {
-    checkState(containsKey(inputs, INPUT_TYPE_SURFACE));
+    checkState(contains(inputs, INPUT_TYPE_SURFACE));
     inputs.get(INPUT_TYPE_SURFACE).textureManager.setDefaultBufferSize(width, height);
   }
 
@@ -245,7 +245,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
    *     {@linkplain #registerInput registered}.
    */
   public void setOnInputFrameProcessedListener(OnInputFrameProcessedListener listener) {
-    checkState(containsKey(inputs, INPUT_TYPE_TEXTURE_ID));
+    checkState(contains(inputs, INPUT_TYPE_TEXTURE_ID));
     inputs.get(INPUT_TYPE_TEXTURE_ID).textureManager.setOnInputFrameProcessedListener(listener);
   }
 
diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/DefaultAudioMixer.java b/libraries/transformer/src/main/java/androidx/media3/transformer/DefaultAudioMixer.java
index 6c19fe96ad..6b977aa844 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/DefaultAudioMixer.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/DefaultAudioMixer.java
@@ -18,7 +18,7 @@ package androidx.media3.transformer;
 import static androidx.media3.common.audio.AudioProcessor.EMPTY_BUFFER;
 import static androidx.media3.common.util.Assertions.checkArgument;
 import static androidx.media3.common.util.Assertions.checkState;
-import static androidx.media3.common.util.Util.containsKey;
+import static androidx.media3.common.util.Util.contains;
 import static java.lang.Math.max;
 import static java.lang.Math.min;
 
@@ -174,7 +174,7 @@ public final class DefaultAudioMixer implements AudioMixer {
   @Override
   public boolean hasSource(int sourceId) {
     checkStateIsConfigured();
-    return containsKey(sources, sourceId);
+    return contains(sources, sourceId);
   }
 
   @Override
@@ -319,7 +319,7 @@ public final class DefaultAudioMixer implements AudioMixer {
   }
 
   private SourceInfo getSourceById(int sourceId) {
-    checkState(containsKey(sources, sourceId), "Source not found.");
+    checkState(contains(sources, sourceId), "Source not found.");
     return sources.get(sourceId);
   }
 
diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/MuxerWrapper.java b/libraries/transformer/src/main/java/androidx/media3/transformer/MuxerWrapper.java
index d8623d19e9..66bbf7dfd4 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/MuxerWrapper.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/MuxerWrapper.java
@@ -19,7 +19,7 @@ package androidx.media3.transformer;
 import static androidx.media3.common.util.Assertions.checkArgument;
 import static androidx.media3.common.util.Assertions.checkNotNull;
 import static androidx.media3.common.util.Assertions.checkState;
-import static androidx.media3.common.util.Util.containsKey;
+import static androidx.media3.common.util.Util.contains;
 import static java.lang.Math.max;
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 
@@ -185,7 +185,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
         "Unsupported track format: " + sampleMimeType);
 
     checkState(
-        !containsKey(trackTypeToInfo, trackType), "There is already a track of type " + trackType);
+        !contains(trackTypeToInfo, trackType), "There is already a track of type " + trackType);
 
     ensureMuxerInitialized();
 
@@ -227,7 +227,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
   public boolean writeSample(
       @C.TrackType int trackType, ByteBuffer data, boolean isKeyFrame, long presentationTimeUs)
       throws Muxer.MuxerException {
-    checkArgument(containsKey(trackTypeToInfo, trackType));
+    checkArgument(contains(trackTypeToInfo, trackType));
     TrackInfo trackInfo = trackTypeToInfo.get(trackType);
     boolean canWriteSample = canWriteSample(trackType, presentationTimeUs);
     if (trackType == C.TRACK_TYPE_VIDEO) {
@@ -269,7 +269,7 @@ import org.checkerframework.checker.nullness.qual.RequiresNonNull;
    * @param trackType The {@link C.TrackType}.
    */
   public void endTrack(@C.TrackType int trackType) {
-    if (!containsKey(trackTypeToInfo, trackType)) {
+    if (!contains(trackTypeToInfo, trackType)) {
       return;
     }
 
diff --git a/libraries/transformer/src/main/java/androidx/media3/transformer/TransformerInternal.java b/libraries/transformer/src/main/java/androidx/media3/transformer/TransformerInternal.java
index a1cfb28e56..91b3b4255a 100644
--- a/libraries/transformer/src/main/java/androidx/media3/transformer/TransformerInternal.java
+++ b/libraries/transformer/src/main/java/androidx/media3/transformer/TransformerInternal.java
@@ -18,7 +18,7 @@ package androidx.media3.transformer;
 
 import static androidx.media3.common.util.Assertions.checkArgument;
 import static androidx.media3.common.util.Assertions.checkState;
-import static androidx.media3.common.util.Util.containsKey;
+import static androidx.media3.common.util.Util.contains;
 import static androidx.media3.transformer.AssetLoader.SUPPORTED_OUTPUT_TYPE_DECODED;
 import static androidx.media3.transformer.AssetLoader.SUPPORTED_OUTPUT_TYPE_ENCODED;
 import static androidx.media3.transformer.Composition.HDR_MODE_KEEP_HDR;
@@ -801,7 +801,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
     public Format getAssetLoaderInputFormat(int sequenceIndex, @C.TrackType int trackType) {
       SparseArray<Format> trackTypeToFirstAssetLoaderInputFormat =
           sequencesMetadata.get(sequenceIndex).trackTypeToFirstAssetLoaderInputFormat;
-      checkState(containsKey(trackTypeToFirstAssetLoaderInputFormat, trackType));
+      checkState(contains(trackTypeToFirstAssetLoaderInputFormat, trackType));
       return trackTypeToFirstAssetLoaderInputFormat.get(trackType);
     }
 
@@ -842,7 +842,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
       @C.TrackType int trackType = getProcessedTrackType(assetLoaderInputFormat.sampleMimeType);
       SparseArray<Format> trackTypeToFirstAssetLoaderInputFormat =
           sequencesMetadata.get(sequenceIndex).trackTypeToFirstAssetLoaderInputFormat;
-      checkState(!containsKey(trackTypeToFirstAssetLoaderInputFormat, trackType));
+      checkState(!contains(trackTypeToFirstAssetLoaderInputFormat, trackType));
       trackTypeToFirstAssetLoaderInputFormat.put(trackType, assetLoaderInputFormat);
     }
 
@@ -850,7 +850,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
      * Returns the index of the primary sequence for a given {@link C.TrackType trackType}.
      *
      * <p>A primary sequence for a {@link C.TrackType trackType} is defined as the lowest indexed
-     * sequence that containsKey a track of the given {@code trackType}.
+     * sequence that contains a track of the given {@code trackType}.
      */
     public int getIndexForPrimarySequence(@C.TrackType int trackType) {
       checkState(
@@ -859,7 +859,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
       for (int i = 0; i < sequencesMetadata.size(); i++) {
         SparseArray<Format> trackTypeToFirstAssetLoaderInputFormat =
             sequencesMetadata.get(i).trackTypeToFirstAssetLoaderInputFormat;
-        if (containsKey(trackTypeToFirstAssetLoaderInputFormat, trackType)) {
+        if (contains(trackTypeToFirstAssetLoaderInputFormat, trackType)) {
           return i;
         }
       }
@@ -890,7 +890,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
      */
     public void registerGraphInput(@C.TrackType int trackType) {
       int numberOfGraphInputForTrackType = 1;
-      if (containsKey(trackTypeToNumberOfRegisteredGraphInput, trackType)) {
+      if (contains(trackTypeToNumberOfRegisteredGraphInput, trackType)) {
         numberOfGraphInputForTrackType += trackTypeToNumberOfRegisteredGraphInput.get(trackType);
       }
       trackTypeToNumberOfRegisteredGraphInput.put(trackType, numberOfGraphInputForTrackType);
@@ -903,8 +903,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
     public boolean hasAssociatedAllTracksWithGraphInput(@C.TrackType int trackType) {
       int numberOfTracksForTrackType = 0;
       for (int i = 0; i < sequencesMetadata.size(); i++) {
-        if (containsKey(
-            sequencesMetadata.get(i).trackTypeToFirstAssetLoaderInputFormat, trackType)) {
+        if (contains(sequencesMetadata.get(i).trackTypeToFirstAssetLoaderInputFormat, trackType)) {
           numberOfTracksForTrackType++;
         }
       }
@@ -918,10 +917,10 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
       for (int i = 0; i < sequencesMetadata.size(); i++) {
         SparseArray<Format> trackTypeToFirstAssetLoaderInputFormat =
             sequencesMetadata.get(i).trackTypeToFirstAssetLoaderInputFormat;
-        if (containsKey(trackTypeToFirstAssetLoaderInputFormat, C.TRACK_TYPE_AUDIO)) {
+        if (contains(trackTypeToFirstAssetLoaderInputFormat, C.TRACK_TYPE_AUDIO)) {
           outputHasAudio = true;
         }
-        if (containsKey(trackTypeToFirstAssetLoaderInputFormat, C.TRACK_TYPE_VIDEO)) {
+        if (contains(trackTypeToFirstAssetLoaderInputFormat, C.TRACK_TYPE_VIDEO)) {
           outputHasVideo = true;
         }
       }
@@ -931,14 +930,14 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
     /** Registers a {@link SampleExporter} for the given {@link C.TrackType trackType}. */
     public void registerSampleExporter(int trackType, SampleExporter sampleExporter) {
       checkState(
-          !containsKey(trackTypeToSampleExporter, trackType),
+          !contains(trackTypeToSampleExporter, trackType),
           "Exactly one SampleExporter can be added for each track type.");
       trackTypeToSampleExporter.put(trackType, sampleExporter);
     }
 
     /** Sets whether a track should be transcoded. */
     public void setShouldTranscode(@C.TrackType int trackType, boolean shouldTranscode) {
-      if (containsKey(trackTypeToShouldTranscode, trackType)) {
+      if (contains(trackTypeToShouldTranscode, trackType)) {
         checkState(shouldTranscode == trackTypeToShouldTranscode.get(trackType));
         return;
       }
@@ -947,7 +946,7 @@ import org.checkerframework.checker.nullness.qual.MonotonicNonNull;
 
     /** Returns whether a track should be transcoded. */
     public boolean shouldTranscode(@C.TrackType int trackType) {
-      checkState(containsKey(trackTypeToShouldTranscode, trackType));
+      checkState(contains(trackTypeToShouldTranscode, trackType));
       return trackTypeToShouldTranscode.get(trackType);
     }