diff --git a/apex/appsearch/framework/api/current.txt b/apex/appsearch/framework/api/current.txt
index 9fa4b8e5a4e7c..f9ff9dd5fd5b7 100644
--- a/apex/appsearch/framework/api/current.txt
+++ b/apex/appsearch/framework/api/current.txt
@@ -80,7 +80,8 @@ package android.app.appsearch {
     method @NonNull public android.app.appsearch.AppSearchSchema.PropertyConfig.Builder setTokenizerType(int);
   }
 
-  public final class AppSearchSession {
+  public final class AppSearchSession implements java.io.Closeable {
+    method public void close();
     method public void getByUri(@NonNull android.app.appsearch.GetByUriRequest, @NonNull java.util.concurrent.Executor, @NonNull android.app.appsearch.BatchResultCallback<java.lang.String,android.app.appsearch.GenericDocument>);
     method public void getSchema(@NonNull java.util.concurrent.Executor, @NonNull java.util.function.Consumer<android.app.appsearch.AppSearchResult<java.util.Set<android.app.appsearch.AppSearchSchema>>>);
     method public void putDocuments(@NonNull android.app.appsearch.PutDocumentsRequest, @NonNull java.util.concurrent.Executor, @NonNull android.app.appsearch.BatchResultCallback<java.lang.String,java.lang.Void>);
diff --git a/apex/appsearch/framework/api/system-current.txt b/apex/appsearch/framework/api/system-current.txt
index 73a4a196b90ac..56b7ffd353853 100644
--- a/apex/appsearch/framework/api/system-current.txt
+++ b/apex/appsearch/framework/api/system-current.txt
@@ -9,7 +9,8 @@ package android.app.appsearch {
     method public static void initialize();
   }
 
-  public class GlobalSearchSession {
+  public class GlobalSearchSession implements java.io.Closeable {
+    method public void close();
     method @NonNull public android.app.appsearch.SearchResults query(@NonNull String, @NonNull android.app.appsearch.SearchSpec, @NonNull java.util.concurrent.Executor);
   }
 
diff --git a/apex/appsearch/framework/java/android/app/appsearch/AppSearchSession.java b/apex/appsearch/framework/java/android/app/appsearch/AppSearchSession.java
index d4872e8151348..042757797dce4 100644
--- a/apex/appsearch/framework/java/android/app/appsearch/AppSearchSession.java
+++ b/apex/appsearch/framework/java/android/app/appsearch/AppSearchSession.java
@@ -28,6 +28,7 @@ import android.util.Log;
 
 import com.android.internal.util.Preconditions;
 
+import java.io.Closeable;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -42,7 +43,7 @@ import java.util.function.Consumer;
  *
  * This class is thread safe.
  */
-public final class AppSearchSession {
+public final class AppSearchSession implements Closeable {
     private static final String TAG = "AppSearchSession";
     private final String mDatabaseName;
     @UserIdInt
@@ -490,11 +491,10 @@ public final class AppSearchSession {
     }
 
     /**
-     * Closes the SearchSessionImpl to persists all update/delete requests to the disk.
-     *
-     * @hide
+     * Closes the {@link AppSearchSession} to persist all schema and document updates, additions,
+     * and deletes to disk.
      */
-    // TODO(b/175637134) when unhide it, implement Closeable and remove this method.
+    @Override
     public void close() {
         if (mIsMutated && !mIsClosed) {
             try {
diff --git a/apex/appsearch/framework/java/android/app/appsearch/GlobalSearchSession.java b/apex/appsearch/framework/java/android/app/appsearch/GlobalSearchSession.java
index 95f7d796d007a..9e3461675031f 100644
--- a/apex/appsearch/framework/java/android/app/appsearch/GlobalSearchSession.java
+++ b/apex/appsearch/framework/java/android/app/appsearch/GlobalSearchSession.java
@@ -23,6 +23,9 @@ import android.annotation.SystemApi;
 import android.annotation.UserIdInt;
 import android.os.RemoteException;
 
+import com.android.internal.util.Preconditions;
+
+import java.io.Closeable;
 import java.util.Objects;
 import java.util.concurrent.Executor;
 import java.util.function.Consumer;
@@ -34,11 +37,12 @@ import java.util.function.Consumer;
  * @hide
  */
 @SystemApi
-public class GlobalSearchSession {
+public class GlobalSearchSession implements Closeable {
 
     private final IAppSearchManager mService;
     @UserIdInt
     private final int mUserId;
+    private boolean mIsClosed = false;
 
     static void createGlobalSearchSession(
             @NonNull IAppSearchManager service,
@@ -129,7 +133,14 @@ public class GlobalSearchSession {
         Objects.requireNonNull(queryExpression);
         Objects.requireNonNull(searchSpec);
         Objects.requireNonNull(executor);
+        Preconditions.checkState(!mIsClosed, "GlobalSearchSession has already been closed");
         return new SearchResults(mService, /*databaseName=*/null, queryExpression,
                 searchSpec, mUserId, executor);
     }
+
+    /** Closes the {@link GlobalSearchSession}. */
+    @Override
+    public void close() {
+        mIsClosed = true;
+    }
 }