diff --git a/libraries/exoplayer/src/androidTest/java/androidx/media3/exoplayer/MediaExtractorContractTest.java b/libraries/exoplayer/src/androidTest/java/androidx/media3/exoplayer/MediaExtractorContractTest.java
new file mode 100644
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--- /dev/null
+++ b/libraries/exoplayer/src/androidTest/java/androidx/media3/exoplayer/MediaExtractorContractTest.java
@@ -0,0 +1,482 @@
+/*
+ * Copyright 2025 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 androidx.media3.exoplayer;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+import android.content.res.AssetFileDescriptor;
+import android.media.MediaCodec;
+import android.media.MediaDataSource;
+import android.media.MediaExtractor;
+import android.media.MediaFormat;
+import android.media.metrics.LogSessionId;
+import android.net.Uri;
+import android.os.PersistableBundle;
+import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
+import androidx.test.core.app.ApplicationProvider;
+import com.google.common.base.Function;
+import com.google.common.collect.ImmutableList;
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.util.Map;
+import java.util.UUID;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.Parameterized;
+import org.junit.runners.Parameterized.Parameter;
+import org.junit.runners.Parameterized.Parameters;
+
+/**
+ * Contract tests for verifying consistent behavior across {@link MediaExtractor} implementations.
+ *
+ * <p>This tests both platform {@link MediaExtractor} and its compat implementation {@link
+ * MediaExtractorCompat}.
+ */
+@RunWith(Parameterized.class)
+public class MediaExtractorContractTest {
+
+  @Parameters(name = "{0}")
+  public static ImmutableList<Function<Context, MediaExtractorProxy>>
+      mediaExtractorProxyFactories() {
+    return ImmutableList.of(
+        new Function<Context, MediaExtractorProxy>() {
+          @Override
+          public MediaExtractorProxy apply(Context context) {
+            return new FrameworkMediaExtractorProxy();
+          }
+
+          @Override
+          public String toString() {
+            return FrameworkMediaExtractorProxy.class.getSimpleName();
+          }
+        },
+        new Function<Context, MediaExtractorProxy>() {
+          @Override
+          public MediaExtractorProxy apply(Context context) {
+            return new CompatMediaExtractorProxy(context);
+          }
+
+          @Override
+          public String toString() {
+            return CompatMediaExtractorProxy.class.getSimpleName();
+          }
+        });
+  }
+
+  @Parameter public Function<Context, MediaExtractorProxy> mediaExtractorProxyFactory;
+
+  private MediaExtractorProxy mediaExtractorProxy;
+
+  @Before
+  public void setUp() {
+    mediaExtractorProxy =
+        mediaExtractorProxyFactory.apply(ApplicationProvider.getApplicationContext());
+  }
+
+  @After
+  public void tearDown() {
+    mediaExtractorProxy.release();
+  }
+
+  @Test
+  public void setDataSource_withAssetFileDescriptor_returnsCorrectTrackCount() throws IOException {
+    AssetFileDescriptor afd =
+        ApplicationProvider.getApplicationContext().getAssets().openFd("media/mp4/sample.mp4");
+
+    mediaExtractorProxy.setDataSource(afd);
+
+    assertThat(mediaExtractorProxy.getTrackCount()).isEqualTo(2);
+  }
+
+  private static class FrameworkMediaExtractorProxy implements MediaExtractorProxy {
+
+    private final MediaExtractor mediaExtractor;
+
+    public FrameworkMediaExtractorProxy() {
+      this.mediaExtractor = new MediaExtractor();
+    }
+
+    @Override
+    public boolean advance() {
+      return mediaExtractor.advance();
+    }
+
+    @Override
+    public long getCachedDuration() {
+      return mediaExtractor.getCachedDuration();
+    }
+
+    @Override
+    @RequiresApi(24)
+    public Object getDrmInitData() {
+      return mediaExtractor.getDrmInitData();
+    }
+
+    @Override
+    @RequiresApi(31)
+    public LogSessionId getLogSessionId() {
+      return mediaExtractor.getLogSessionId();
+    }
+
+    @Override
+    @RequiresApi(26)
+    public PersistableBundle getMetrics() {
+      return mediaExtractor.getMetrics();
+    }
+
+    @Override
+    public Map<UUID, byte[]> getPsshInfo() {
+      return mediaExtractor.getPsshInfo();
+    }
+
+    @Override
+    public boolean getSampleCryptoInfo(MediaCodec.CryptoInfo info) {
+      return mediaExtractor.getSampleCryptoInfo(info);
+    }
+
+    @Override
+    public int getSampleFlags() {
+      return mediaExtractor.getSampleFlags();
+    }
+
+    @Override
+    @RequiresApi(28)
+    public long getSampleSize() {
+      return mediaExtractor.getSampleSize();
+    }
+
+    @Override
+    public long getSampleTime() {
+      return mediaExtractor.getSampleTime();
+    }
+
+    @Override
+    public int getSampleTrackIndex() {
+      return mediaExtractor.getSampleTrackIndex();
+    }
+
+    @Override
+    public int getTrackCount() {
+      return mediaExtractor.getTrackCount();
+    }
+
+    @Override
+    public MediaFormat getTrackFormat(int trackIndex) {
+      return mediaExtractor.getTrackFormat(trackIndex);
+    }
+
+    @Override
+    public boolean hasCacheReachedEndOfStream() {
+      return mediaExtractor.hasCacheReachedEndOfStream();
+    }
+
+    @Override
+    public int readSampleData(ByteBuffer buffer, int offset) {
+      return mediaExtractor.readSampleData(buffer, offset);
+    }
+
+    @Override
+    public void release() {
+      mediaExtractor.release();
+    }
+
+    @Override
+    public void seekTo(long timeUs, int mode) {
+      mediaExtractor.seekTo(timeUs, mode);
+    }
+
+    @Override
+    public void selectTrack(int trackIndex) {
+      mediaExtractor.selectTrack(trackIndex);
+    }
+
+    @Override
+    @RequiresApi(24)
+    public void setDataSource(AssetFileDescriptor assetFileDescriptor) throws IOException {
+      mediaExtractor.setDataSource(assetFileDescriptor);
+    }
+
+    @Override
+    public void setDataSource(FileDescriptor fileDescriptor) throws IOException {
+      mediaExtractor.setDataSource(fileDescriptor);
+    }
+
+    @Override
+    @RequiresApi(23)
+    public void setDataSource(MediaDataSource mediaDataSource) throws IOException {
+      mediaExtractor.setDataSource(mediaDataSource);
+    }
+
+    @Override
+    public void setDataSource(Context context, Uri uri, @Nullable Map<String, String> headers)
+        throws IOException {
+      mediaExtractor.setDataSource(context, uri, headers);
+    }
+
+    @Override
+    public void setDataSource(FileDescriptor fileDescriptor, long offset, long length)
+        throws IOException {
+      mediaExtractor.setDataSource(fileDescriptor, offset, length);
+    }
+
+    @Override
+    public void setDataSource(String path) throws IOException {
+      mediaExtractor.setDataSource(path);
+    }
+
+    @Override
+    public void setDataSource(String path, @Nullable Map<String, String> headers)
+        throws IOException {
+      mediaExtractor.setDataSource(path, headers);
+    }
+
+    @Override
+    @RequiresApi(31)
+    public void setLogSessionId(LogSessionId logSessionId) {
+      mediaExtractor.setLogSessionId(logSessionId);
+    }
+
+    @Override
+    public void unselectTrack(int trackIndex) {
+      mediaExtractor.unselectTrack(trackIndex);
+    }
+  }
+
+  private static class CompatMediaExtractorProxy implements MediaExtractorProxy {
+
+    private final MediaExtractorCompat mediaExtractorCompat;
+
+    public CompatMediaExtractorProxy(Context context) {
+      this.mediaExtractorCompat = new MediaExtractorCompat(context);
+    }
+
+    @Override
+    public boolean advance() {
+      return mediaExtractorCompat.advance();
+    }
+
+    @Override
+    public long getCachedDuration() {
+      return mediaExtractorCompat.getCachedDuration();
+    }
+
+    @Override
+    @RequiresApi(24)
+    public Object getDrmInitData() {
+      return mediaExtractorCompat.getDrmInitData();
+    }
+
+    @Override
+    @RequiresApi(31)
+    public LogSessionId getLogSessionId() {
+      return mediaExtractorCompat.getLogSessionId();
+    }
+
+    @Override
+    @RequiresApi(26)
+    public PersistableBundle getMetrics() {
+      return mediaExtractorCompat.getMetrics();
+    }
+
+    @Override
+    public Map<UUID, byte[]> getPsshInfo() {
+      return mediaExtractorCompat.getPsshInfo();
+    }
+
+    @Override
+    public boolean getSampleCryptoInfo(MediaCodec.CryptoInfo info) {
+      return mediaExtractorCompat.getSampleCryptoInfo(info);
+    }
+
+    @Override
+    public int getSampleFlags() {
+      return mediaExtractorCompat.getSampleFlags();
+    }
+
+    @Override
+    @RequiresApi(28)
+    public long getSampleSize() {
+      return mediaExtractorCompat.getSampleSize();
+    }
+
+    @Override
+    public long getSampleTime() {
+      return mediaExtractorCompat.getSampleTime();
+    }
+
+    @Override
+    public int getSampleTrackIndex() {
+      return mediaExtractorCompat.getSampleTrackIndex();
+    }
+
+    @Override
+    public int getTrackCount() {
+      return mediaExtractorCompat.getTrackCount();
+    }
+
+    @Override
+    public MediaFormat getTrackFormat(int trackIndex) {
+      return mediaExtractorCompat.getTrackFormat(trackIndex);
+    }
+
+    @Override
+    public boolean hasCacheReachedEndOfStream() {
+      return mediaExtractorCompat.hasCacheReachedEndOfStream();
+    }
+
+    @Override
+    public int readSampleData(ByteBuffer buffer, int offset) {
+      return mediaExtractorCompat.readSampleData(buffer, offset);
+    }
+
+    @Override
+    public void release() {
+      mediaExtractorCompat.release();
+    }
+
+    @Override
+    public void seekTo(long timeUs, int mode) {
+      mediaExtractorCompat.seekTo(timeUs, mode);
+    }
+
+    @Override
+    public void selectTrack(int trackIndex) {
+      mediaExtractorCompat.selectTrack(trackIndex);
+    }
+
+    @Override
+    @RequiresApi(24)
+    public void setDataSource(AssetFileDescriptor assetFileDescriptor) throws IOException {
+      mediaExtractorCompat.setDataSource(assetFileDescriptor);
+    }
+
+    @Override
+    public void setDataSource(FileDescriptor fileDescriptor) throws IOException {
+      mediaExtractorCompat.setDataSource(fileDescriptor);
+    }
+
+    @Override
+    @RequiresApi(23)
+    public void setDataSource(MediaDataSource mediaDataSource) throws IOException {
+      mediaExtractorCompat.setDataSource(mediaDataSource);
+    }
+
+    @Override
+    public void setDataSource(Context context, Uri uri, @Nullable Map<String, String> headers)
+        throws IOException {
+      mediaExtractorCompat.setDataSource(context, uri, headers);
+    }
+
+    @Override
+    public void setDataSource(FileDescriptor fileDescriptor, long offset, long length)
+        throws IOException {
+      mediaExtractorCompat.setDataSource(fileDescriptor, offset, length);
+    }
+
+    @Override
+    public void setDataSource(String path) throws IOException {
+      mediaExtractorCompat.setDataSource(path);
+    }
+
+    @Override
+    public void setDataSource(String path, @Nullable Map<String, String> headers)
+        throws IOException {
+      mediaExtractorCompat.setDataSource(path, headers);
+    }
+
+    @Override
+    @RequiresApi(31)
+    public void setLogSessionId(LogSessionId logSessionId) {
+      mediaExtractorCompat.setLogSessionId(logSessionId);
+    }
+
+    @Override
+    public void unselectTrack(int trackIndex) {
+      mediaExtractorCompat.unselectTrack(trackIndex);
+    }
+  }
+
+  @SuppressWarnings("unused") // TODO(b/392566318): Remove after adding tests for all methods.
+  private interface MediaExtractorProxy {
+
+    boolean advance();
+
+    long getCachedDuration();
+
+    @RequiresApi(24)
+    Object getDrmInitData();
+
+    @RequiresApi(31)
+    LogSessionId getLogSessionId();
+
+    @RequiresApi(26)
+    PersistableBundle getMetrics();
+
+    Map<UUID, byte[]> getPsshInfo();
+
+    boolean getSampleCryptoInfo(MediaCodec.CryptoInfo info);
+
+    int getSampleFlags();
+
+    @RequiresApi(28)
+    long getSampleSize();
+
+    long getSampleTime();
+
+    int getSampleTrackIndex();
+
+    int getTrackCount();
+
+    MediaFormat getTrackFormat(int trackIndex);
+
+    boolean hasCacheReachedEndOfStream();
+
+    int readSampleData(ByteBuffer buffer, int offset);
+
+    void release();
+
+    void seekTo(long timeUs, @MediaExtractorCompat.SeekMode int mode);
+
+    void selectTrack(int trackIndex);
+
+    @RequiresApi(24)
+    void setDataSource(AssetFileDescriptor assetFileDescriptor) throws IOException;
+
+    void setDataSource(FileDescriptor fileDescriptor) throws IOException;
+
+    @RequiresApi(23)
+    void setDataSource(MediaDataSource mediaDataSource) throws IOException;
+
+    void setDataSource(Context context, Uri uri, @Nullable Map<String, String> headers)
+        throws IOException;
+
+    void setDataSource(FileDescriptor fileDescriptor, long offset, long length) throws IOException;
+
+    void setDataSource(String path) throws IOException;
+
+    void setDataSource(String path, @Nullable Map<String, String> headers) throws IOException;
+
+    @RequiresApi(31)
+    void setLogSessionId(LogSessionId logSessionId);
+
+    void unselectTrack(int trackIndex);
+  }
+}