diff --git a/camera/ndk/include/camera/NdkCameraCaptureSession.h b/camera/ndk/include/camera/NdkCameraCaptureSession.h
index 78e062a..9bf8247 100644
--- a/camera/ndk/include/camera/NdkCameraCaptureSession.h
+++ b/camera/ndk/include/camera/NdkCameraCaptureSession.h
@@ -45,8 +45,6 @@
 
 __BEGIN_DECLS
 
-#if __ANDROID_API__ >= 24
-
 /**
  * ACameraCaptureSession is an opaque type that manages frame captures of a camera device.
  *
@@ -434,7 +432,7 @@
  *
  */
 camera_status_t ACameraCaptureSession_getDevice(
-        ACameraCaptureSession* session, /*out*/ACameraDevice** device);
+        ACameraCaptureSession* session, /*out*/ACameraDevice** device) __INTRODUCED_IN(24);
 
 /**
  * Submit an array of requests to be captured in sequence as a burst in the minimum of time possible.
@@ -472,7 +470,7 @@
         ACameraCaptureSession* session,
         /*optional*/ACameraCaptureSession_captureCallbacks* callbacks,
         int numRequests, ACaptureRequest** requests,
-        /*optional*/int* captureSequenceId);
+        /*optional*/int* captureSequenceId) __INTRODUCED_IN(24);
 
 /**
  * Request endlessly repeating capture of a sequence of images by this capture session.
@@ -526,7 +524,7 @@
         ACameraCaptureSession* session,
         /*optional*/ACameraCaptureSession_captureCallbacks* callbacks,
         int numRequests, ACaptureRequest** requests,
-        /*optional*/int* captureSequenceId);
+        /*optional*/int* captureSequenceId) __INTRODUCED_IN(24);
 
 /**
  * Cancel any ongoing repeating capture set by {@link ACameraCaptureSession_setRepeatingRequest}.
@@ -549,7 +547,8 @@
  *         <li>{@link ACAMERA_ERROR_CAMERA_SERVICE} if the camera service encounters fatal error</li>
  *         <li>{@link ACAMERA_ERROR_UNKNOWN} if the method fails for some other reasons</li></ul>
  */
-camera_status_t ACameraCaptureSession_stopRepeating(ACameraCaptureSession* session);
+camera_status_t ACameraCaptureSession_stopRepeating(ACameraCaptureSession* session)
+        __INTRODUCED_IN(24);
 
 /**
  * Discard all captures currently pending and in-progress as fast as possible.
@@ -589,11 +588,8 @@
  *         <li>{@link ACAMERA_ERROR_CAMERA_SERVICE} if the camera service encounters fatal error</li>
  *         <li>{@link ACAMERA_ERROR_UNKNOWN} if the method fails for some other reasons</li></ul>
  */
-camera_status_t ACameraCaptureSession_abortCaptures(ACameraCaptureSession* session);
-
-#endif /* __ANDROID_API__ >= 24 */
-
-#if __ANDROID_API__ >= 28
+camera_status_t ACameraCaptureSession_abortCaptures(ACameraCaptureSession* session)
+        __INTRODUCED_IN(24);
 
 typedef struct ACaptureSessionOutput ACaptureSessionOutput;
 
@@ -638,8 +634,7 @@
  *         <li>{@link ACAMERA_ERROR_UNKNOWN} if the method fails for some other reasons</li></ul>
  */
 camera_status_t ACameraCaptureSession_updateSharedOutput(ACameraCaptureSession* session,
-        ACaptureSessionOutput* output);
-#endif /* __ANDROID_API__ >= 28 */
+        ACaptureSessionOutput* output) __INTRODUCED_IN(28);
 
 __END_DECLS
 
diff --git a/camera/ndk/include/camera/NdkCameraDevice.h b/camera/ndk/include/camera/NdkCameraDevice.h
index b715b12..bdd27f9 100644
--- a/camera/ndk/include/camera/NdkCameraDevice.h
+++ b/camera/ndk/include/camera/NdkCameraDevice.h
@@ -44,8 +44,6 @@
 
 __BEGIN_DECLS
 
-#if __ANDROID_API__ >= 24
-
 /**
  * ACameraDevice is opaque type that provides access to a camera device.
  *
@@ -176,7 +174,7 @@
  *         <li>{@link ACAMERA_OK} if the method call succeeds.</li>
  *         <li>{@link ACAMERA_ERROR_INVALID_PARAMETER} if device is NULL.</li></ul>
  */
-camera_status_t ACameraDevice_close(ACameraDevice* device);
+camera_status_t ACameraDevice_close(ACameraDevice* device) __INTRODUCED_IN(24);
 
 /**
  * Return the camera id associated with this camera device.
@@ -187,7 +185,7 @@
  * delete/free by the application. Also the returned string must not be used after the device
  * has been closed.
  */
-const char* ACameraDevice_getId(const ACameraDevice* device);
+const char* ACameraDevice_getId(const ACameraDevice* device) __INTRODUCED_IN(24);
 
 typedef enum {
     /**
@@ -290,7 +288,7 @@
  */
 camera_status_t ACameraDevice_createCaptureRequest(
         const ACameraDevice* device, ACameraDevice_request_template templateId,
-        /*out*/ACaptureRequest** request);
+        /*out*/ACaptureRequest** request) __INTRODUCED_IN(24);
 
 
 typedef struct ACaptureSessionOutputContainer ACaptureSessionOutputContainer;
@@ -313,7 +311,7 @@
  *         <li>{@link ACAMERA_ERROR_INVALID_PARAMETER} if container is NULL.</li></ul>
  */
 camera_status_t ACaptureSessionOutputContainer_create(
-        /*out*/ACaptureSessionOutputContainer** container);
+        /*out*/ACaptureSessionOutputContainer** container) __INTRODUCED_IN(24);
 
 /**
  * Free a capture session output container.
@@ -322,7 +320,8 @@
  *
  * @see ACaptureSessionOutputContainer_create
  */
-void            ACaptureSessionOutputContainer_free(ACaptureSessionOutputContainer* container);
+void            ACaptureSessionOutputContainer_free(ACaptureSessionOutputContainer* container)
+        __INTRODUCED_IN(24);
 
 /**
  * Create a ACaptureSessionOutput object.
@@ -344,7 +343,7 @@
  * @see ACaptureSessionOutputContainer_add
  */
 camera_status_t ACaptureSessionOutput_create(
-        ANativeWindow* anw, /*out*/ACaptureSessionOutput** output);
+        ANativeWindow* anw, /*out*/ACaptureSessionOutput** output) __INTRODUCED_IN(24);
 
 /**
  * Free a ACaptureSessionOutput object.
@@ -353,7 +352,7 @@
  *
  * @see ACaptureSessionOutput_create
  */
-void            ACaptureSessionOutput_free(ACaptureSessionOutput* output);
+void            ACaptureSessionOutput_free(ACaptureSessionOutput* output) __INTRODUCED_IN(24);
 
 /**
  * Add an {@link ACaptureSessionOutput} object to {@link ACaptureSessionOutputContainer}.
@@ -366,7 +365,8 @@
  *         <li>{@link ACAMERA_ERROR_INVALID_PARAMETER} if container or output is NULL.</li></ul>
  */
 camera_status_t ACaptureSessionOutputContainer_add(
-        ACaptureSessionOutputContainer* container, const ACaptureSessionOutput* output);
+        ACaptureSessionOutputContainer* container, const ACaptureSessionOutput* output)
+        __INTRODUCED_IN(24);
 
 /**
  * Remove an {@link ACaptureSessionOutput} object from {@link ACaptureSessionOutputContainer}.
@@ -382,7 +382,8 @@
  *         <li>{@link ACAMERA_ERROR_INVALID_PARAMETER} if container or output is NULL.</li></ul>
  */
 camera_status_t ACaptureSessionOutputContainer_remove(
-        ACaptureSessionOutputContainer* container, const ACaptureSessionOutput* output);
+        ACaptureSessionOutputContainer* container, const ACaptureSessionOutput* output)
+        __INTRODUCED_IN(24);
 
 /**
  * Create a new camera capture session by providing the target output set of {@link ANativeWindow}
@@ -663,11 +664,7 @@
         ACameraDevice* device,
         const ACaptureSessionOutputContainer*       outputs,
         const ACameraCaptureSession_stateCallbacks* callbacks,
-        /*out*/ACameraCaptureSession** session);
-
-#endif /* __ANDROID_API__ >= 24 */
-
-#if __ANDROID_API__ >= 28
+        /*out*/ACameraCaptureSession** session) __INTRODUCED_IN(24);
 
 /**
  * Create a shared ACaptureSessionOutput object.
@@ -691,7 +688,7 @@
  * @see ACaptureSessionOutputContainer_add
  */
 camera_status_t ACaptureSessionSharedOutput_create(
-        ANativeWindow* anw, /*out*/ACaptureSessionOutput** output);
+        ANativeWindow* anw, /*out*/ACaptureSessionOutput** output) __INTRODUCED_IN(28);
 
 /**
  * Add a native window to shared ACaptureSessionOutput.
@@ -708,7 +705,8 @@
  *             window associated with ACaptureSessionOutput; or anw is already present inside
  *             ACaptureSessionOutput.</li></ul>
  */
-camera_status_t ACaptureSessionSharedOutput_add(ACaptureSessionOutput *output, ANativeWindow *anw);
+camera_status_t ACaptureSessionSharedOutput_add(ACaptureSessionOutput *output,
+        ANativeWindow *anw) __INTRODUCED_IN(28);
 
 /**
  * Remove a native window from shared ACaptureSessionOutput.
@@ -724,7 +722,7 @@
  *             ACaptureSessionOutput.</li></ul>
  */
 camera_status_t ACaptureSessionSharedOutput_remove(ACaptureSessionOutput *output,
-        ANativeWindow* anw);
+        ANativeWindow* anw) __INTRODUCED_IN(28);
 
 /**
  * Create a new camera capture session similar to {@link ACameraDevice_createCaptureSession}. This
@@ -757,9 +755,7 @@
         const ACaptureSessionOutputContainer* outputs,
         const ACaptureRequest* sessionParameters,
         const ACameraCaptureSession_stateCallbacks* callbacks,
-        /*out*/ACameraCaptureSession** session);
-
-#endif /* __ANDROID_API__ >= 28 */
+        /*out*/ACameraCaptureSession** session) __INTRODUCED_IN(28);
 
 __END_DECLS
 
diff --git a/camera/ndk/include/camera/NdkCameraError.h b/camera/ndk/include/camera/NdkCameraError.h
index 6b58155..e19ce36 100644
--- a/camera/ndk/include/camera/NdkCameraError.h
+++ b/camera/ndk/include/camera/NdkCameraError.h
@@ -40,8 +40,6 @@
 
 __BEGIN_DECLS
 
-#if __ANDROID_API__ >= 24
-
 typedef enum {
     ACAMERA_OK = 0,
 
@@ -132,8 +130,6 @@
     ACAMERA_ERROR_PERMISSION_DENIED     = ACAMERA_ERROR_BASE - 13,
 } camera_status_t;
 
-#endif /* __ANDROID_API__ >= 24 */
-
 __END_DECLS
 
 #endif /* _NDK_CAMERA_ERROR_H */
diff --git a/camera/ndk/include/camera/NdkCameraManager.h b/camera/ndk/include/camera/NdkCameraManager.h
index e5b3ad8..a1cca4d 100644
--- a/camera/ndk/include/camera/NdkCameraManager.h
+++ b/camera/ndk/include/camera/NdkCameraManager.h
@@ -44,8 +44,6 @@
 
 __BEGIN_DECLS
 
-#if __ANDROID_API__ >= 24
-
 /**
  * ACameraManager is opaque type that provides access to camera service.
  *
@@ -65,14 +63,14 @@
  * @return a {@link ACameraManager} instance.
  *
  */
-ACameraManager* ACameraManager_create();
+ACameraManager* ACameraManager_create() __INTRODUCED_IN(24);
 
 /**
  * <p>Delete the {@link ACameraManager} instance and free its resources. </p>
  *
  * @param manager the {@link ACameraManager} instance to be deleted.
  */
-void ACameraManager_delete(ACameraManager* manager);
+void ACameraManager_delete(ACameraManager* manager) __INTRODUCED_IN(24);
 
 /// Struct to hold list of camera devices
 typedef struct ACameraIdList {
@@ -102,14 +100,14 @@
  *         <li>{@link ACAMERA_ERROR_NOT_ENOUGH_MEMORY} if allocating memory fails.</li></ul>
  */
 camera_status_t ACameraManager_getCameraIdList(ACameraManager* manager,
-                                              /*out*/ACameraIdList** cameraIdList);
+        /*out*/ACameraIdList** cameraIdList) __INTRODUCED_IN(24);
 
 /**
  * Delete a list of camera devices allocated via {@link ACameraManager_getCameraIdList}.
  *
  * @param cameraIdList the {@link ACameraIdList} to be deleted.
  */
-void ACameraManager_deleteCameraIdList(ACameraIdList* cameraIdList);
+void ACameraManager_deleteCameraIdList(ACameraIdList* cameraIdList) __INTRODUCED_IN(24);
 
 /**
  * Definition of camera availability callbacks.
@@ -120,7 +118,8 @@
  *                 argument is owned by camera framework and will become invalid immediately after
  *                 this callback returns.
  */
-typedef void (*ACameraManager_AvailabilityCallback)(void* context, const char* cameraId);
+typedef void (*ACameraManager_AvailabilityCallback)(void* context,
+        const char* cameraId) __INTRODUCED_IN(24);
 
 /**
  * A listener for camera devices becoming available or unavailable to open.
@@ -168,7 +167,8 @@
  *                  {ACameraManager_AvailabilityCallbacks#onCameraUnavailable} is NULL.</li></ul>
  */
 camera_status_t ACameraManager_registerAvailabilityCallback(
-        ACameraManager* manager, const ACameraManager_AvailabilityCallbacks* callback);
+        ACameraManager* manager,
+        const ACameraManager_AvailabilityCallbacks* callback) __INTRODUCED_IN(24);
 
 /**
  * Unregister camera availability callbacks.
@@ -185,7 +185,8 @@
  *                  {ACameraManager_AvailabilityCallbacks#onCameraUnavailable} is NULL.</li></ul>
  */
 camera_status_t ACameraManager_unregisterAvailabilityCallback(
-        ACameraManager* manager, const ACameraManager_AvailabilityCallbacks* callback);
+        ACameraManager* manager,
+        const ACameraManager_AvailabilityCallbacks* callback) __INTRODUCED_IN(24);
 
 /**
  * Query the capabilities of a camera device. These capabilities are
@@ -211,7 +212,7 @@
  */
 camera_status_t ACameraManager_getCameraCharacteristics(
         ACameraManager* manager, const char* cameraId,
-        /*out*/ACameraMetadata** characteristics);
+        /*out*/ACameraMetadata** characteristics) __INTRODUCED_IN(24);
 
 /**
  * Open a connection to a camera with the given ID. The opened camera device will be
@@ -271,9 +272,7 @@
 camera_status_t ACameraManager_openCamera(
         ACameraManager* manager, const char* cameraId,
         ACameraDevice_StateCallbacks* callback,
-        /*out*/ACameraDevice** device);
-
-#endif /* __ANDROID_API__ >= 24 */
+        /*out*/ACameraDevice** device) __INTRODUCED_IN(24);
 
 __END_DECLS
 
diff --git a/camera/ndk/include/camera/NdkCameraMetadata.h b/camera/ndk/include/camera/NdkCameraMetadata.h
index bdb1587..2078da7 100644
--- a/camera/ndk/include/camera/NdkCameraMetadata.h
+++ b/camera/ndk/include/camera/NdkCameraMetadata.h
@@ -44,8 +44,6 @@
 
 __BEGIN_DECLS
 
-#if __ANDROID_API__ >= 24
-
 /**
  * ACameraMetadata is opaque type that provides access to read-only camera metadata like camera
  * characteristics (via {@link ACameraManager_getCameraCharacteristics}) or capture results (via
@@ -191,7 +189,8 @@
  *             of input tag value.</li></ul>
  */
 camera_status_t ACameraMetadata_getConstEntry(
-        const ACameraMetadata* metadata, uint32_t tag, /*out*/ACameraMetadata_const_entry* entry);
+        const ACameraMetadata* metadata,
+        uint32_t tag, /*out*/ACameraMetadata_const_entry* entry) __INTRODUCED_IN(24);
 
 /**
  * List all the entry tags in input {@link ACameraMetadata}.
@@ -208,7 +207,8 @@
  *         <li>{@link ACAMERA_ERROR_UNKNOWN} if the method fails for some other reasons.</li></ul>
  */
 camera_status_t ACameraMetadata_getAllTags(
-        const ACameraMetadata* metadata, /*out*/int32_t* numEntries, /*out*/const uint32_t** tags);
+        const ACameraMetadata* metadata,
+        /*out*/int32_t* numEntries, /*out*/const uint32_t** tags) __INTRODUCED_IN(24);
 
 /**
  * Create a copy of input {@link ACameraMetadata}.
@@ -220,16 +220,14 @@
  *
  * @return a valid ACameraMetadata pointer or NULL if the input metadata cannot be copied.
  */
-ACameraMetadata* ACameraMetadata_copy(const ACameraMetadata* src);
+ACameraMetadata* ACameraMetadata_copy(const ACameraMetadata* src) __INTRODUCED_IN(24);
 
 /**
  * Free a {@link ACameraMetadata} structure.
  *
  * @param metadata the {@link ACameraMetadata} to be freed.
  */
-void ACameraMetadata_free(ACameraMetadata* metadata);
-
-#endif /* __ANDROID_API__ >= 24 */
+void ACameraMetadata_free(ACameraMetadata* metadata) __INTRODUCED_IN(24);
 
 __END_DECLS
 
diff --git a/camera/ndk/include/camera/NdkCameraMetadataTags.h b/camera/ndk/include/camera/NdkCameraMetadataTags.h
index e90b8f8..7398f78 100644
--- a/camera/ndk/include/camera/NdkCameraMetadataTags.h
+++ b/camera/ndk/include/camera/NdkCameraMetadataTags.h
@@ -40,8 +40,6 @@
 
 __BEGIN_DECLS
 
-#if __ANDROID_API__ >= 24
-
 typedef enum acamera_metadata_section {
     ACAMERA_COLOR_CORRECTION,
     ACAMERA_CONTROL,
@@ -7880,9 +7878,6 @@
 
 } acamera_metadata_enum_android_distortion_correction_mode_t;
 
-
-#endif /* __ANDROID_API__ >= 24 */
-
 __END_DECLS
 
 #endif /* _NDK_CAMERA_METADATA_TAGS_H */
diff --git a/camera/ndk/include/camera/NdkCaptureRequest.h b/camera/ndk/include/camera/NdkCaptureRequest.h
index 4961ce3..2fb5d12 100644
--- a/camera/ndk/include/camera/NdkCaptureRequest.h
+++ b/camera/ndk/include/camera/NdkCaptureRequest.h
@@ -44,8 +44,6 @@
 
 __BEGIN_DECLS
 
-#if __ANDROID_API__ >= 24
-
 // Container for output targets
 typedef struct ACameraOutputTargets ACameraOutputTargets;
 
@@ -101,7 +99,8 @@
  *
  * @see ACaptureRequest_addTarget
  */
-camera_status_t ACameraOutputTarget_create(ANativeWindow* window, ACameraOutputTarget** output);
+camera_status_t ACameraOutputTarget_create(ANativeWindow* window,
+        ACameraOutputTarget** output) __INTRODUCED_IN(24);
 
 /**
  * Free a ACameraOutputTarget object.
@@ -110,7 +109,7 @@
  *
  * @see ACameraOutputTarget_create
  */
-void ACameraOutputTarget_free(ACameraOutputTarget* output);
+void ACameraOutputTarget_free(ACameraOutputTarget* output) __INTRODUCED_IN(24);
 
 /**
  * Add an {@link ACameraOutputTarget} object to {@link ACaptureRequest}.
@@ -123,7 +122,7 @@
  *         <li>{@link ACAMERA_ERROR_INVALID_PARAMETER} if request or output is NULL.</li></ul>
  */
 camera_status_t ACaptureRequest_addTarget(ACaptureRequest* request,
-        const ACameraOutputTarget* output);
+        const ACameraOutputTarget* output) __INTRODUCED_IN(24);
 
 /**
  * Remove an {@link ACameraOutputTarget} object from {@link ACaptureRequest}.
@@ -138,7 +137,7 @@
  *         <li>{@link ACAMERA_ERROR_INVALID_PARAMETER} if request or output is NULL.</li></ul>
  */
 camera_status_t ACaptureRequest_removeTarget(ACaptureRequest* request,
-        const ACameraOutputTarget* output);
+        const ACameraOutputTarget* output) __INTRODUCED_IN(24);
 
 /**
  * Get a metadata entry from input {@link ACaptureRequest}.
@@ -158,7 +157,7 @@
  *             entry of input tag value.</li></ul>
  */
 camera_status_t ACaptureRequest_getConstEntry(
-        const ACaptureRequest* request, uint32_t tag, ACameraMetadata_const_entry* entry);
+        const ACaptureRequest* request, uint32_t tag, ACameraMetadata_const_entry* entry) __INTRODUCED_IN(24);
 
 /*
  * List all the entry tags in input {@link ACaptureRequest}.
@@ -179,7 +178,7 @@
  *         <li>{@link ACAMERA_ERROR_UNKNOWN} if the method fails for some other reasons.</li></ul>
  */
 camera_status_t ACaptureRequest_getAllTags(
-        const ACaptureRequest* request, /*out*/int32_t* numTags, /*out*/const uint32_t** tags);
+        const ACaptureRequest* request, /*out*/int32_t* numTags, /*out*/const uint32_t** tags) __INTRODUCED_IN(24);
 
 /**
  * Set/change a camera capture control entry with unsigned 8 bits data type.
@@ -198,7 +197,7 @@
  *             the tag is not controllable by application.</li></ul>
  */
 camera_status_t ACaptureRequest_setEntry_u8(
-        ACaptureRequest* request, uint32_t tag, uint32_t count, const uint8_t* data);
+        ACaptureRequest* request, uint32_t tag, uint32_t count, const uint8_t* data) __INTRODUCED_IN(24);
 
 /**
  * Set/change a camera capture control entry with signed 32 bits data type.
@@ -217,7 +216,7 @@
  *             the tag is not controllable by application.</li></ul>
  */
 camera_status_t ACaptureRequest_setEntry_i32(
-        ACaptureRequest* request, uint32_t tag, uint32_t count, const int32_t* data);
+        ACaptureRequest* request, uint32_t tag, uint32_t count, const int32_t* data) __INTRODUCED_IN(24);
 
 /**
  * Set/change a camera capture control entry with float data type.
@@ -236,7 +235,7 @@
  *             the tag is not controllable by application.</li></ul>
  */
 camera_status_t ACaptureRequest_setEntry_float(
-        ACaptureRequest* request, uint32_t tag, uint32_t count, const float* data);
+        ACaptureRequest* request, uint32_t tag, uint32_t count, const float* data) __INTRODUCED_IN(24);
 
 /**
  * Set/change a camera capture control entry with signed 64 bits data type.
@@ -255,7 +254,7 @@
  *             the tag is not controllable by application.</li></ul>
  */
 camera_status_t ACaptureRequest_setEntry_i64(
-        ACaptureRequest* request, uint32_t tag, uint32_t count, const int64_t* data);
+        ACaptureRequest* request, uint32_t tag, uint32_t count, const int64_t* data) __INTRODUCED_IN(24);
 
 /**
  * Set/change a camera capture control entry with double data type.
@@ -274,7 +273,7 @@
  *             the tag is not controllable by application.</li></ul>
  */
 camera_status_t ACaptureRequest_setEntry_double(
-        ACaptureRequest* request, uint32_t tag, uint32_t count, const double* data);
+        ACaptureRequest* request, uint32_t tag, uint32_t count, const double* data) __INTRODUCED_IN(24);
 
 /**
  * Set/change a camera capture control entry with rational data type.
@@ -294,18 +293,14 @@
  */
 camera_status_t ACaptureRequest_setEntry_rational(
         ACaptureRequest* request, uint32_t tag, uint32_t count,
-        const ACameraMetadata_rational* data);
+        const ACameraMetadata_rational* data) __INTRODUCED_IN(24);
 
 /**
  * Free a {@link ACaptureRequest} structure.
  *
  * @param request the {@link ACaptureRequest} to be freed.
  */
-void ACaptureRequest_free(ACaptureRequest* request);
-
-#endif /* __ANDROID_API__ >= 24 */
-
-#if __ANDROID_API__ >= 28
+void ACaptureRequest_free(ACaptureRequest* request) __INTRODUCED_IN(24);
 
 /**
  * Associate an arbitrary user context pointer to the {@link ACaptureRequest}
@@ -325,7 +320,7 @@
  *         <li>{@link ACAMERA_ERROR_INVALID_PARAMETER} if request is NULL.</li></ul>
  */
 camera_status_t ACaptureRequest_setUserContext(
-        ACaptureRequest* request, void* context);
+        ACaptureRequest* request, void* context) __INTRODUCED_IN(28);
 
 /**
  * Get the user context pointer of the {@link ACaptureRequest}
@@ -341,7 +336,7 @@
  *         <li>{@link ACAMERA_ERROR_INVALID_PARAMETER} if request is NULL.</li></ul>
  */
 camera_status_t ACaptureRequest_getUserContext(
-        const ACaptureRequest* request, /*out*/void** context);
+        const ACaptureRequest* request, /*out*/void** context) __INTRODUCED_IN(28);
 
 /**
  * Create a copy of input {@link ACaptureRequest}.
@@ -353,9 +348,7 @@
  *
  * @return a valid ACaptureRequest pointer or NULL if the input request cannot be copied.
  */
-ACaptureRequest* ACaptureRequest_copy(const ACaptureRequest* src);
-
-#endif /* __ANDROID_API__ >= 28 */
+ACaptureRequest* ACaptureRequest_copy(const ACaptureRequest* src) __INTRODUCED_IN(28);
 
 __END_DECLS
 
diff --git a/camera/ndk/libcamera2ndk.map.txt b/camera/ndk/libcamera2ndk.map.txt
index d179aa0..a29e96d 100644
--- a/camera/ndk/libcamera2ndk.map.txt
+++ b/camera/ndk/libcamera2ndk.map.txt
@@ -6,11 +6,11 @@
     ACameraCaptureSession_getDevice;
     ACameraCaptureSession_setRepeatingRequest;
     ACameraCaptureSession_stopRepeating;
-    ACameraCaptureSession_updateSharedOutput;
+    ACameraCaptureSession_updateSharedOutput; # introduced=28
     ACameraDevice_close;
     ACameraDevice_createCaptureRequest;
     ACameraDevice_createCaptureSession;
-    ACameraDevice_createCaptureSessionWithSessionParameters;
+    ACameraDevice_createCaptureSessionWithSessionParameters; # introduced=28
     ACameraDevice_getId;
     ACameraManager_create;
     ACameraManager_delete;
@@ -27,11 +27,11 @@
     ACameraOutputTarget_create;
     ACameraOutputTarget_free;
     ACaptureRequest_addTarget;
-    ACaptureRequest_copy;
+    ACaptureRequest_copy; # introduced=28
     ACaptureRequest_free;
     ACaptureRequest_getAllTags;
     ACaptureRequest_getConstEntry;
-    ACaptureRequest_getUserContext;
+    ACaptureRequest_getUserContext; # introduced=28
     ACaptureRequest_removeTarget;
     ACaptureRequest_setEntry_double;
     ACaptureRequest_setEntry_float;
@@ -39,15 +39,15 @@
     ACaptureRequest_setEntry_i64;
     ACaptureRequest_setEntry_rational;
     ACaptureRequest_setEntry_u8;
-    ACaptureRequest_setUserContext;
+    ACaptureRequest_setUserContext; # introduced=28
     ACaptureSessionOutputContainer_add;
     ACaptureSessionOutputContainer_create;
     ACaptureSessionOutputContainer_free;
     ACaptureSessionOutputContainer_remove;
     ACaptureSessionOutput_create;
-    ACaptureSessionSharedOutput_create;
-    ACaptureSessionSharedOutput_add;
-    ACaptureSessionSharedOutput_remove;
+    ACaptureSessionSharedOutput_create; # introduced=28
+    ACaptureSessionSharedOutput_add; # introduced=28
+    ACaptureSessionSharedOutput_remove; # introduced=28
     ACaptureSessionOutput_free;
   local:
     *;