diff --git a/cobalt/android/BUILD.gn b/cobalt/android/BUILD.gn
index bcd4910f3ec..8dc79ff14e9 100644
--- a/cobalt/android/BUILD.gn
+++ b/cobalt/android/BUILD.gn
@@ -32,13 +32,21 @@ jinja_template("cobalt_manifest") {
   variables = [ "manifest_package=dev.cobalt.coat" ]
 }
 
+generate_jni("jni_headers") {
+  sources = [ "apk/app/src/main/java/dev/cobalt/coat/StarboardBridge.java" ]
+}
+
 # TODO(cobalt): Re-enable or remove disabled java files.
 android_library("cobalt_apk_java") {
   testonly = true
   resources_package = "dev.cobalt.coat"
+  annotation_processor_deps = [ "//base/android/jni_generator:jni_processor" ]
+
   deps = [
     ":cobalt_java_resources",
+    ":jni_headers",
     "//base:base_java",
+    "//base:jni_java",
     "//base:process_launcher_java",
     "//build/android:build_java",
     "//components/embedder_support/android:view_java",
@@ -56,6 +64,7 @@ android_library("cobalt_apk_java") {
     "//ui/android:ui_no_recycler_view_java",
     "//url:gurl_java",
   ]
+
   sources = [
     "apk/app/src/app/java/dev/cobalt/app/CobaltApplication.java",
     "apk/app/src/app/java/dev/cobalt/app/MainActivity.java",
diff --git a/cobalt/android/apk/app/src/main/java/dev/cobalt/coat/StarboardBridge.java b/cobalt/android/apk/app/src/main/java/dev/cobalt/coat/StarboardBridge.java
index 731f3015ed2..6b088d2a91a 100644
--- a/cobalt/android/apk/app/src/main/java/dev/cobalt/coat/StarboardBridge.java
+++ b/cobalt/android/apk/app/src/main/java/dev/cobalt/coat/StarboardBridge.java
@@ -52,8 +52,12 @@
 import java.util.HashMap;
 import java.util.Locale;
 import java.util.TimeZone;
+import org.chromium.base.annotations.CalledByNative;
+import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.annotations.NativeMethods;
 
 /** Implementation of the required JNI methods called by the Starboard C++ code. */
+@JNINamespace("starboard::android::shared")
 public class StarboardBridge {
 
   /** Interface to be implemented by the Android Application hosting the starboard app. */
@@ -145,7 +149,18 @@ public StarboardBridge(
 
   private native void closeNativeStarboard(long nativeApp);
 
-  private native long nativeCurrentMonotonicTime();
+  @NativeMethods
+    interface Natives {
+        void onStop();
+
+        long currentMonotonicTime();
+
+        // boolean initJNI();
+
+        // long startNativeStarboard();
+
+        // void closeNativeStarboard(long nativeApp);
+    }
 
   protected void onActivityStart(Activity activity) {
     Log.e(TAG, "onActivityStart ran");
@@ -164,8 +179,6 @@ protected void onActivityStop(Activity activity) {
     afterStopped();
   }
 
-  private native void nativeOnStop();
-
   protected void onActivityDestroy(Activity activity) {
     if (applicationStopped) {
       // We can't restart the starboard app, so kill the process for a clean start next time.
@@ -188,7 +201,7 @@ protected void onServiceDestroy(Service service) {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected void beforeStartOrResume() {
     Log.i(TAG, "Prepare to resume");
     // Bring our platform services to life before resuming so that they're ready to deal with
@@ -204,7 +217,7 @@ protected void beforeStartOrResume() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected void beforeSuspend() {
     try {
       Log.i(TAG, "Prepare to suspend");
@@ -222,7 +235,7 @@ protected void beforeSuspend() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected void afterStopped() {
     applicationStopped = true;
     ttsHelper.shutdown();
@@ -242,20 +255,20 @@ protected void afterStopped() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected void applicationStarted() {
     applicationReady = true;
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected void applicationStopping() {
     applicationReady = false;
     applicationStopped = true;
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   public void requestSuspend() {
     Activity activity = activityHolder.get();
     if (activity != null) {
@@ -275,7 +288,7 @@ public boolean onSearchRequested() {
   // private native boolean nativeOnSearchRequested();
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   public Context getApplicationContext() {
     if (appContext == null) {
       throw new IllegalArgumentException("appContext cannot be null");
@@ -284,7 +297,7 @@ public Context getApplicationContext() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   void raisePlatformError(@PlatformError.ErrorType int errorType, long data) {
     PlatformError error = new PlatformError(activityHolder, errorType, data);
     error.raise();
@@ -304,7 +317,7 @@ protected Holder<Activity> getActivityHolder() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected String[] getArgs() {
     if (args == null) {
       throw new IllegalArgumentException("args cannot be null");
@@ -314,7 +327,7 @@ protected String[] getArgs() {
 
   /** Returns the URL from the Intent that started the app. */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected String getStartDeepLink() {
     if (startDeepLink == null) {
       throw new IllegalArgumentException("startDeepLink cannot be null");
@@ -342,7 +355,7 @@ private void nativeHandleDeepLink(String url) {
    * May be overridden for use cases that need to segregate storage.
    */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected String getFilesAbsolutePath() {
     return appContext.getFilesDir().getAbsolutePath();
   }
@@ -352,7 +365,7 @@ protected String getFilesAbsolutePath() {
    * overridden for use cases that need to segregate storage.
    */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected String getCacheAbsolutePath() {
     return appContext.getCacheDir().getAbsolutePath();
   }
@@ -364,6 +377,9 @@ protected String getCacheAbsolutePath() {
    */
   @SuppressWarnings("unused")
   @UsedByNative
+  // TODO: (cobalt b/372559388) Migrate complicated returned type functions to JNI zero.
+  // The @CalledByNative annotation has strict signature parsing rules,
+  // and Pair<byte[], byte[]> is not be supported well.
   Pair<byte[], byte[]> getLocalInterfaceAddressAndNetmask(boolean wantIPv6) {
     try {
       Enumeration<NetworkInterface> it = NetworkInterface.getNetworkInterfaces();
@@ -411,7 +427,7 @@ Pair<byte[], byte[]> getLocalInterfaceAddressAndNetmask(boolean wantIPv6) {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   CobaltTextToSpeechHelper getTextToSpeechHelper() {
     if (ttsHelper == null) {
       throw new IllegalArgumentException("ttsHelper cannot be null for native code");
@@ -423,7 +439,7 @@ CobaltTextToSpeechHelper getTextToSpeechHelper() {
    * @return A new CaptionSettings object with the current system caption settings.
    */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   CaptionSettings getCaptionSettings() {
     CaptioningManager cm =
         (CaptioningManager) appContext.getSystemService(Context.CAPTIONING_SERVICE);
@@ -432,13 +448,13 @@ CaptionSettings getCaptionSettings() {
 
   /** Java-layer implementation of SbSystemGetLocaleId. */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   String systemGetLocaleId() {
     return Locale.getDefault().toLanguageTag();
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   String getTimeZoneId() {
     Locale locale = Locale.getDefault();
     Calendar calendar = Calendar.getInstance(locale);
@@ -450,19 +466,19 @@ String getTimeZoneId() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   SizeF getDisplayDpi() {
     return DisplayUtil.getDisplayDpi();
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   Size getDisplaySize() {
     return DisplayUtil.getSystemDisplaySize();
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   public ResourceOverlay getResourceOverlay() {
     if (resourceOverlay == null) {
       throw new IllegalArgumentException("resourceOverlay cannot be null for native code");
@@ -484,7 +500,7 @@ private static String getSystemProperty(String name) {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   Size getDeviceResolution() {
     String displaySize =
         android.os.Build.VERSION.SDK_INT < 28
@@ -508,7 +524,7 @@ Size getDeviceResolution() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   boolean isNetworkConnected() {
     if (networkStatus == null) {
       throw new IllegalArgumentException("networkStatus cannot be null for native code");
@@ -522,7 +538,7 @@ boolean isNetworkConnected() {
    * @return true if no device is connected.
    */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   public boolean isMicrophoneDisconnected() {
     // A check specifically for microphones is not available before API 28, so it is assumed that a
     // connected input audio device is a microphone.
@@ -551,7 +567,7 @@ public boolean isMicrophoneDisconnected() {
    * @return true if the microphone mute is on.
    */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   public boolean isMicrophoneMute() {
     AudioManager audioManager = (AudioManager) appContext.getSystemService(AUDIO_SERVICE);
     return audioManager.isMicrophoneMute();
@@ -561,7 +577,7 @@ public boolean isMicrophoneMute() {
    * @return true if we have an active network connection and it's on an wireless network.
    */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   boolean isCurrentNetworkWireless() {
     ConnectivityManager connMgr =
         (ConnectivityManager) appContext.getSystemService(Context.CONNECTIVITY_SERVICE);
@@ -581,7 +597,7 @@ boolean isCurrentNetworkWireless() {
    * @return true if the user has enabled accessibility high contrast text in the operating system.
    */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   boolean isAccessibilityHighContrastTextEnabled() {
     AccessibilityManager am =
         (AccessibilityManager) appContext.getSystemService(Context.ACCESSIBILITY_SERVICE);
@@ -596,7 +612,7 @@ boolean isAccessibilityHighContrastTextEnabled() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   void updateMediaSession(
       int playbackState,
       long actions,
@@ -615,7 +631,7 @@ void updateMediaSession(
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   public void deactivateMediaSession() {
     // TODO(b/377019873): re-enable
     Log.e(TAG, "MediaSession is disabled");
@@ -624,7 +640,7 @@ public void deactivateMediaSession() {
 
   /** Returns string for kSbSystemPropertyUserAgentAuxField */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected String getUserAgentAuxField() {
     StringBuilder sb = new StringBuilder();
 
@@ -652,7 +668,7 @@ protected String getUserAgentAuxField() {
 
   /** Returns string for kSbSystemPropertyAdvertisingId */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected String getAdvertisingId() {
     // TODO(b/377049113): re-enable
     Log.e(TAG, "IFA is disabled");
@@ -662,7 +678,7 @@ protected String getAdvertisingId() {
 
   /** Returns boolean for kSbSystemPropertyLimitAdTracking */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected boolean getLimitAdTracking() {
     // TODO(b/377049113): re-enable
     Log.e(TAG, "IFA is disabled");
@@ -671,7 +687,7 @@ protected boolean getLimitAdTracking() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   AudioOutputManager getAudioOutputManager() {
     if (audioOutputManager == null) {
       throw new IllegalArgumentException("audioOutputManager cannot be null for native code");
@@ -681,7 +697,7 @@ AudioOutputManager getAudioOutputManager() {
 
   /** Returns Java layer implementation for AudioPermissionRequester */
   // @SuppressWarnings("unused")
-  // @UsedByNative
+  // @CalledByNative
   // AudioPermissionRequester getAudioPermissionRequester() {
   //   return audioPermissionRequester;
   // }
@@ -691,7 +707,7 @@ AudioOutputManager getAudioOutputManager() {
   // }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   public void resetVideoSurface() {
     Activity activity = activityHolder.get();
     if (activity instanceof CobaltActivity) {
@@ -700,7 +716,7 @@ public void resetVideoSurface() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   public void setVideoSurfaceBounds(final int x, final int y, final int width, final int height) {
     Activity activity = activityHolder.get();
     if (activity instanceof CobaltActivity) {
@@ -710,7 +726,7 @@ public void setVideoSurfaceBounds(final int x, final int y, final int width, fin
 
   /** Return supported hdr types. */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   public int[] getSupportedHdrTypes() {
     Display defaultDisplay = DisplayUtil.getDefaultDisplay();
     if (defaultDisplay == null) {
@@ -739,7 +755,7 @@ public boolean hasCobaltService(String serviceName) {
     return cobaltServiceFactories.get(serviceName) != null;
   }
 
-  public CobaltService openCobaltService(long nativeService, String serviceName) {
+  public CobaltService openCobaltService(long nativeService, String serviceName) { // ???????????
     if (cobaltServices.get(serviceName) != null) {
       // Attempting to re-open an already open service fails.
       Log.e(TAG, String.format("Cannot open already open service %s", serviceName));
@@ -788,12 +804,12 @@ public byte[] sendToCobaltService(String serviceName, byte [] data) {
 
   /** Returns the application start timestamp. */
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected long getAppStartTimestamp() {
     Activity activity = activityHolder.get();
     if (activity instanceof CobaltActivity) {
       long javaStartTimestamp = ((CobaltActivity) activity).getAppStartTimestamp();
-      long cppTimestamp = nativeCurrentMonotonicTime();
+      long cppTimestamp = StarboardBridgeJni.get().currentMonotonicTime();
       long javaStopTimestamp = System.nanoTime();
       return cppTimestamp
           - (javaStopTimestamp - javaStartTimestamp) / timeNanosecondsPerMicrosecond;
@@ -802,7 +818,7 @@ protected long getAppStartTimestamp() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   void reportFullyDrawn() {
     Activity activity = activityHolder.get();
     if (activity != null) {
@@ -811,7 +827,7 @@ void reportFullyDrawn() {
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   public void setCrashContext(String key, String value) {
     Log.i(TAG, "setCrashContext Called: " + key + ", " + value);
     crashContext.put(key, value);
@@ -829,19 +845,19 @@ public void registerCrashContextUpdateHandler(CrashContextUpdateHandler handler)
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected boolean getIsAmatiDevice() {
     return this.isAmatiDevice;
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected String getBuildFingerprint() {
     return Build.FINGERPRINT;
   }
 
   @SuppressWarnings("unused")
-  @UsedByNative
+  @CalledByNative
   protected long getPlayServicesVersion() {
     try {
       if (android.os.Build.VERSION.SDK_INT < 28) {
diff --git a/starboard/android/shared/BUILD.gn b/starboard/android/shared/BUILD.gn
index 7d081f02bf7..2801ca2a6b8 100644
--- a/starboard/android/shared/BUILD.gn
+++ b/starboard/android/shared/BUILD.gn
@@ -265,6 +265,8 @@ static_library("starboard_platform") {
     #"speech_synthesis_internal.cc",
     #"speech_synthesis_is_supported.cc",
     #"speech_synthesis_speak.cc",
+    "starboard_bridge.cc",
+    "starboard_bridge.h",
     "system_get_extensions.cc",
     "system_get_locale_id.cc",
     "system_get_path.cc",
@@ -316,12 +318,14 @@ static_library("starboard_platform") {
   public_deps = [
     ":starboard_base_symbolize",
     ":starboard_jni_state",
+    "//cobalt/android:jni_headers",
     "//starboard/common",
     "//starboard/shared/starboard/media:media_util",
     "//starboard/shared/starboard/player/filter:filter_based_player_sources",
   ]
 
   deps = [
+    "//base",
     "//third_party/libevent",
     "//third_party/opus",
   ]
diff --git a/starboard/android/shared/android_main.cc b/starboard/android/shared/android_main.cc
index 0ed8090673a..fbc37107b75 100644
--- a/starboard/android/shared/android_main.cc
+++ b/starboard/android/shared/android_main.cc
@@ -35,6 +35,8 @@
 #include "starboard/crashpad_wrapper/wrapper.h"  // nogncheck
 #endif
 
+#include "starboard/android/shared/starboard_bridge.h"
+
 namespace starboard {
 namespace android {
 namespace shared {
@@ -292,10 +294,14 @@ void StarboardThreadLaunch() {
 }
 #endif  // SB_IS(EVERGREEN_COMPATIBLE)
 
+// TODO: consolidate this function when fully deprecate JniEnvExt.
 extern "C" SB_EXPORT_PLATFORM void Java_dev_cobalt_coat_StarboardBridge_initJNI(
     JniEnvExt* env,
     jobject starboard_bridge) {
   JniEnvExt::Initialize(env, starboard_bridge);
+
+  // Initialize the singleton instance of StarboardBridge
+  StarboardBridge::GetInstance()->Initialize(env, starboard_bridge);
 }
 
 extern "C" SB_EXPORT_PLATFORM jlong
diff --git a/starboard/android/shared/application_android.cc b/starboard/android/shared/application_android.cc
index 5d076a7f268..9db7e234b47 100644
--- a/starboard/android/shared/application_android.cc
+++ b/starboard/android/shared/application_android.cc
@@ -24,6 +24,7 @@
 #include <string>
 #include <vector>
 
+#include "base/android/jni_android.h"
 #include "starboard/extension/accessibility.h"
 
 #include "starboard/android/shared/file_internal.h"
@@ -44,14 +45,6 @@
 namespace starboard {
 namespace android {
 namespace shared {
-namespace {
-int64_t GetAppStartTimestamp() {
-  JniEnvExt* env = JniEnvExt::Get();
-  jlong app_start_timestamp =
-      env->CallStarboardLongMethodOrAbort("getAppStartTimestamp", "()J");
-  return app_start_timestamp;
-}
-}  // namespace
 
 // TODO(cobalt, b/378708359): Remove this dummy init.
 void stubSbEventHandle(const SbEvent* event) {
@@ -70,18 +63,19 @@ ApplicationAndroid::ApplicationAndroid(
   // from the assets. The use ICU is used in our logging.
   SbFileAndroidInitialize();
 
-  JniEnvExt* env = JniEnvExt::Get();
-  jobject local_ref = env->CallStarboardObjectMethodOrAbort(
-      "getResourceOverlay", "()Ldev/cobalt/coat/ResourceOverlay;");
-  resource_overlay_ = env->ConvertLocalRefToGlobalRef(local_ref);
+  base::android::ScopedJavaLocalRef<jobject> resource_overlay =
+      starboard_bridge_->GetResourceOverlay();
+  resource_overlay_ =
+      JniEnvExt::Get()->ConvertLocalRefToGlobalRef(resource_overlay.obj());
+
   SbAudioSinkPrivate::Initialize();
-  app_start_timestamp_ = GetAppStartTimestamp();
-  env->CallStarboardVoidMethodOrAbort("applicationStarted", "()V");
+
+  app_start_timestamp_ = starboard_bridge_->GetAppStartTimestamp();
+  starboard_bridge_->ApplicationStarted();
 }
 
 ApplicationAndroid::~ApplicationAndroid() {
-  JniEnvExt* env = JniEnvExt::Get();
-  env->CallStarboardVoidMethodOrAbort("applicationStopping", "()V");
+  starboard_bridge_->ApplicationStopping();
 
   // The application is exiting.
   // Release the global reference.
@@ -94,12 +88,6 @@ ApplicationAndroid::~ApplicationAndroid() {
   JniEnvExt::OnThreadShutdown();
 }
 
-extern "C" SB_EXPORT_PLATFORM void
-Java_dev_cobalt_coat_StarboardBridge_nativeOnStop(JniEnvExt* env) {
-  SbAudioSinkPrivate::TearDown();
-  SbFileAndroidTeardown();
-}
-
 extern "C" SB_EXPORT_PLATFORM jboolean
 Java_dev_cobalt_coat_StarboardBridge_nativeOnSearchRequested(
     JniEnvExt* env,
@@ -108,14 +96,6 @@ Java_dev_cobalt_coat_StarboardBridge_nativeOnSearchRequested(
   return true;
 }
 
-extern "C" SB_EXPORT_PLATFORM jlong
-Java_dev_cobalt_coat_StarboardBridge_nativeCurrentMonotonicTime(
-    JNIEnv* env,
-    jobject jcaller,
-    jboolean online) {
-  return CurrentMonotonicTime();
-}
-
 extern "C" SB_EXPORT_PLATFORM void
 Java_dev_cobalt_coat_CobaltSystemConfigChangeReceiver_nativeDateTimeConfigurationChanged(
     JNIEnv* env,
diff --git a/starboard/android/shared/application_android.h b/starboard/android/shared/application_android.h
index 16c2a577840..c97c11b76f8 100644
--- a/starboard/android/shared/application_android.h
+++ b/starboard/android/shared/application_android.h
@@ -29,6 +29,8 @@
 #include "starboard/shared/starboard/queue_application.h"
 #include "starboard/types.h"
 
+#include "starboard/android/shared/starboard_bridge.h"
+
 namespace starboard {
 namespace android {
 namespace shared {
@@ -66,6 +68,9 @@ class ApplicationAndroid
   void WakeSystemEventWait() override {}
 
  private:
+  // starboard_bridge_ is a global singleton, use a raw pointer to not interfere
+  // with it's lifecycle management.
+  StarboardBridge* starboard_bridge_;
   jobject resource_overlay_;
 
   Mutex overlay_mutex_;
diff --git a/starboard/android/shared/starboard_bridge.cc b/starboard/android/shared/starboard_bridge.cc
new file mode 100644
index 00000000000..734bbf54673
--- /dev/null
+++ b/starboard/android/shared/starboard_bridge.cc
@@ -0,0 +1,65 @@
+// Copyright 2024 The Cobalt Authors. All Rights Reserved.
+//
+// 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.
+
+#include "starboard/android/shared/starboard_bridge.h"
+
+#include "starboard/android/shared/file_internal.h"
+#include "starboard/common/time.h"
+#include "starboard/media.h"
+#include "starboard/shared/starboard/audio_sink/audio_sink_internal.h"
+
+// Must come after all headers that specialize FromJniType() / ToJniType().
+#include "cobalt/android/jni_headers/StarboardBridge_jni.h"
+
+namespace starboard {
+namespace android {
+namespace shared {
+
+extern "C" SB_EXPORT_PLATFORM void JNI_StarboardBridge_OnStop(JNIEnv* env) {
+  SbAudioSinkPrivate::TearDown();
+  SbFileAndroidTeardown();
+}
+
+extern "C" SB_EXPORT_PLATFORM jlong
+JNI_StarboardBridge_CurrentMonotonicTime(JNIEnv* env) {
+  return CurrentMonotonicTime();
+}
+
+long StarboardBridge::GetAppStartTimestamp() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  CHECK(env);
+  return Java_StarboardBridge_getAppStartTimestamp(env, j_starboard_bridge_);
+}
+
+base::android::ScopedJavaLocalRef<jobject>
+StarboardBridge::GetResourceOverlay() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  CHECK(env);
+  return Java_StarboardBridge_getResourceOverlay(env, j_starboard_bridge_);
+}
+
+void StarboardBridge::ApplicationStarted() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  CHECK(env);
+  return Java_StarboardBridge_applicationStarted(env, j_starboard_bridge_);
+}
+
+void StarboardBridge::ApplicationStopping() {
+  JNIEnv* env = base::android::AttachCurrentThread();
+  CHECK(env);
+  return Java_StarboardBridge_applicationStopping(env, j_starboard_bridge_);
+}
+}  // namespace shared
+}  // namespace android
+}  // namespace starboard
diff --git a/starboard/android/shared/starboard_bridge.h b/starboard/android/shared/starboard_bridge.h
new file mode 100644
index 00000000000..87321883399
--- /dev/null
+++ b/starboard/android/shared/starboard_bridge.h
@@ -0,0 +1,64 @@
+// Copyright 2024 The Cobalt Authors. All Rights Reserved.
+//
+// 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.
+
+#ifndef STARBOARD_ANDROID_SHARED_STARBOARD_BRIDGE_H_
+#define STARBOARD_ANDROID_SHARED_STARBOARD_BRIDGE_H_
+
+#include <jni.h>
+
+#include "base/android/scoped_java_ref.h"
+#include "base/memory/singleton.h"
+
+namespace starboard {
+namespace android {
+namespace shared {
+
+class StarboardBridge {
+ public:
+  // Returns the singleton.
+  static StarboardBridge* GetInstance() {
+    return base::Singleton<StarboardBridge>::get();
+  }
+
+  void Initialize(JNIEnv* env, jobject obj) {
+    j_starboard_bridge_.Reset(env, obj);
+  }
+
+  long GetAppStartTimestamp();
+
+  base::android::ScopedJavaLocalRef<jobject> GetResourceOverlay();
+
+  void ApplicationStarted();
+
+  void ApplicationStopping();
+
+ private:
+  StarboardBridge() = default;
+  ~StarboardBridge() = default;
+
+  // Prevent copy construction and assignment
+  StarboardBridge(const StarboardBridge&) = delete;
+  StarboardBridge& operator=(const StarboardBridge&) = delete;
+
+  friend struct base::DefaultSingletonTraits<StarboardBridge>;
+
+  // Java StarboardBridge instance.
+  base::android::ScopedJavaGlobalRef<jobject> j_starboard_bridge_;
+};
+
+}  // namespace shared
+}  // namespace android
+}  // namespace starboard
+
+#endif  // STARBOARD_ANDROID_SHARED_STARBOARD_BRIDGE_H_