diff --git a/Android.bp b/Android.bp
index 4c1cafc..f5620f8 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1,3 +1,10 @@
+ndk_headers {
+    name: "libandroid_headers",
+    from: "include/android",
+    to: "android",
+    srcs: ["include/android/**/*.h"],
+}
+
 subdirs = [
     "cmds/*",
     "libs/*",
diff --git a/include/android/asset_manager.h b/include/android/asset_manager.h
index d654839..beb6549 100644
--- a/include/android/asset_manager.h
+++ b/include/android/asset_manager.h
@@ -26,6 +26,8 @@
 #ifndef ANDROID_ASSET_MANAGER_H
 #define ANDROID_ASSET_MANAGER_H
 
+#include <sys/cdefs.h>
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -131,6 +133,7 @@
  */
 off_t AAsset_seek(AAsset* asset, off_t offset, int whence);
 
+#if __ANDROID_API__ >= 13
 /**
  * Seek to the specified offset within the asset data.  'whence' uses the
  * same constants as lseek()/fseek().
@@ -141,6 +144,7 @@
  * Returns the new position on success, or (off64_t) -1 on error.
  */
 off64_t AAsset_seek64(AAsset* asset, off64_t offset, int whence);
+#endif
 
 /**
  * Close the asset, freeing all associated resources.
@@ -159,23 +163,27 @@
  */
 off_t AAsset_getLength(AAsset* asset);
 
+#if __ANDROID_API__ >= 13
 /**
  * Report the total size of the asset data. Reports the size using a 64-bit
  * number insted of 32-bit as AAsset_getLength.
  */
 off64_t AAsset_getLength64(AAsset* asset);
+#endif
 
 /**
  * Report the total amount of asset data that can be read from the current position.
  */
 off_t AAsset_getRemainingLength(AAsset* asset);
 
+#if __ANDROID_API__ >= 13
 /**
  * Report the total amount of asset data that can be read from the current position.
  *
  * Uses a 64-bit number instead of a 32-bit number as AAsset_getRemainingLength does.
  */
 off64_t AAsset_getRemainingLength64(AAsset* asset);
+#endif
 
 /**
  * Open a new file descriptor that can be used to read the asset data. If the
@@ -187,6 +195,7 @@
  */
 int AAsset_openFileDescriptor(AAsset* asset, off_t* outStart, off_t* outLength);
 
+#if __ANDROID_API__ >= 13
 /**
  * Open a new file descriptor that can be used to read the asset data.
  *
@@ -197,6 +206,7 @@
  * compressed).
  */
 int AAsset_openFileDescriptor64(AAsset* asset, off64_t* outStart, off64_t* outLength);
+#endif
 
 /**
  * Returns whether this asset's internal buffer is allocated in ordinary RAM (i.e. not
diff --git a/include/android/choreographer.h b/include/android/choreographer.h
index 02c83dc..43346fe 100644
--- a/include/android/choreographer.h
+++ b/include/android/choreographer.h
@@ -30,6 +30,8 @@
 
 __BEGIN_DECLS
 
+#if __ANDROID_API__ >= 24
+
 struct AChoreographer;
 typedef struct AChoreographer AChoreographer;
 
@@ -62,6 +64,9 @@
  */
 void AChoreographer_postFrameCallbackDelayed(AChoreographer* choreographer,
                 AChoreographer_frameCallback callback, void* data, long delayMillis);
+
+#endif /* __ANDROID_API__ >= 24 */
+
 __END_DECLS
 
 #endif // ANDROID_CHOREOGRAPHER_H
diff --git a/include/android/configuration.h b/include/android/configuration.h
index 81f71a9..8e10f67 100644
--- a/include/android/configuration.h
+++ b/include/android/configuration.h
@@ -26,6 +26,8 @@
 #ifndef ANDROID_CONFIGURATION_H
 #define ANDROID_CONFIGURATION_H
 
+#include <sys/cdefs.h>
+
 #include <android/asset_manager.h>
 
 #ifdef __cplusplus
@@ -628,6 +630,7 @@
  */
 void AConfiguration_setUiModeNight(AConfiguration* config, int32_t uiModeNight);
 
+#if __ANDROID_API__ >= 13
 /**
  * Return the current configuration screen width in dp units, or
  * ACONFIGURATION_SCREEN_WIDTH_DP_ANY if not set.
@@ -660,7 +663,9 @@
  * Set the configuration's smallest screen width in dp units.
  */
 void AConfiguration_setSmallestScreenWidthDp(AConfiguration* config, int32_t value);
+#endif /* __ANDROID_API__ >= 13 */
 
+#if __ANDROID_API__ >= 17
 /**
  * Return the configuration's layout direction, or
  * ACONFIGURATION_LAYOUTDIR_ANY if not set.
@@ -671,6 +676,7 @@
  * Set the configuration's layout direction.
  */
 void AConfiguration_setLayoutDirection(AConfiguration* config, int32_t value);
+#endif /* __ANDROID_API__ >= 17 */
 
 /**
  * Perform a diff between two configurations.  Returns a bit mask of
diff --git a/include/android/input.h b/include/android/input.h
index fd9fa98..f928c6e 100644
--- a/include/android/input.h
+++ b/include/android/input.h
@@ -26,6 +26,8 @@
 #ifndef _ANDROID_INPUT_H
 #define _ANDROID_INPUT_H
 
+#include <sys/cdefs.h>
+
 /******************************************************************
  *
  * IMPORTANT NOTICE:
@@ -978,8 +980,10 @@
  */
 int32_t AMotionEvent_getMetaState(const AInputEvent* motion_event);
 
+#if __ANDROID_API__ >= 14
 /** Get the button state of all buttons that are pressed. */
 int32_t AMotionEvent_getButtonState(const AInputEvent* motion_event);
+#endif
 
 /**
  * Get a bitfield indicating which edges, if any, were touched by this motion event.
@@ -1044,12 +1048,14 @@
  */
 int32_t AMotionEvent_getPointerId(const AInputEvent* motion_event, size_t pointer_index);
 
+#if __ANDROID_API__ >= 14
 /**
  * Get the tool type of a pointer for the given pointer index.
  * The tool type indicates the type of tool used to make contact such as a
  * finger or stylus, if known.
  */
 int32_t AMotionEvent_getToolType(const AInputEvent* motion_event, size_t pointer_index);
+#endif
 
 /**
  * Get the original raw X coordinate of this event.
@@ -1139,9 +1145,11 @@
  */
 float AMotionEvent_getOrientation(const AInputEvent* motion_event, size_t pointer_index);
 
+#if __ANDROID_API__ >= 13
 /** Get the value of the request axis for the given pointer index. */
 float AMotionEvent_getAxisValue(const AInputEvent* motion_event,
         int32_t axis, size_t pointer_index);
+#endif
 
 /**
  * Get the number of historical points in this event.  These are movements that
@@ -1272,12 +1280,14 @@
 float AMotionEvent_getHistoricalOrientation(const AInputEvent* motion_event, size_t pointer_index,
         size_t history_index);
 
+#if __ANDROID_API__ >= 13
 /**
  * Get the historical value of the request axis for the given pointer index
  * that occurred between this event and the previous motion event.
  */
 float AMotionEvent_getHistoricalAxisValue(const AInputEvent* motion_event,
         int32_t axis, size_t pointer_index, size_t history_index);
+#endif
 
 
 struct AInputQueue;
diff --git a/include/android/multinetwork.h b/include/android/multinetwork.h
index 6c718c9..be01518 100644
--- a/include/android/multinetwork.h
+++ b/include/android/multinetwork.h
@@ -51,6 +51,7 @@
  * on failure with an appropriate errno value set.
  */
 
+#if __ANDROID_API__ >= 24
 
 /**
  * Set the network to be used by the given socket file descriptor.
@@ -104,6 +105,8 @@
         const char *node, const char *service,
         const struct addrinfo *hints, struct addrinfo **res);
 
+#endif /* __ANDROID_API__ >= 24 */
+
 __END_DECLS
 
 #endif  // ANDROID_MULTINETWORK_H
diff --git a/include/android/native_window.h b/include/android/native_window.h
index cf07f1a..b60b9f1 100644
--- a/include/android/native_window.h
+++ b/include/android/native_window.h
@@ -26,6 +26,8 @@
 #ifndef ANDROID_NATIVE_WINDOW_H
 #define ANDROID_NATIVE_WINDOW_H
 
+#include <sys/cdefs.h>
+
 #include <android/rect.h>
 
 #ifdef __cplusplus
diff --git a/include/android/native_window_jni.h b/include/android/native_window_jni.h
index 60a36c3..1ec2a67 100644
--- a/include/android/native_window_jni.h
+++ b/include/android/native_window_jni.h
@@ -26,6 +26,8 @@
 #ifndef ANDROID_NATIVE_WINDOW_JNI_H
 #define ANDROID_NATIVE_WINDOW_JNI_H
 
+#include <sys/cdefs.h>
+
 #include <android/native_window.h>
 
 #include <jni.h>
@@ -42,6 +44,16 @@
  */
 ANativeWindow* ANativeWindow_fromSurface(JNIEnv* env, jobject surface);
 
+#if __ANDROID_API__ >= 13
+/**
+ * Return the ANativeWindow associated with a Java SurfaceTexture object,
+ * for interacting with it through native code.  This acquires a reference
+ * on the ANativeWindow that is returned; be sure to use ANativeWindow_release()
+ * when done with it so that it doesn't leak.
+ */
+ANativeWindow* ANativeWindow_fromSurfaceTexture(JNIEnv* env, jobject surfaceTexture);
+#endif
+
 #ifdef __cplusplus
 };
 #endif
diff --git a/include/android/sensor.h b/include/android/sensor.h
index 5a61213..b6a42ae 100644
--- a/include/android/sensor.h
+++ b/include/android/sensor.h
@@ -367,12 +367,14 @@
  */
 ASensor const* ASensorManager_getDefaultSensor(ASensorManager* manager, int type);
 
+#if __ANDROID_API__ >= 21
 /**
  * Returns the default sensor with the given type and wakeUp properties or NULL if no sensor
  * of this type and wakeUp properties exists.
  */
 ASensor const* ASensorManager_getDefaultSensorEx(ASensorManager* manager, int type,
         bool wakeUp);
+#endif
 
 /**
  * Creates a new sensor event queue and associate it with a looper.
@@ -471,6 +473,7 @@
  */
 int ASensor_getMinDelay(ASensor const* sensor);
 
+#if __ANDROID_API__ >= 21
 /**
  * Returns the maximum size of batches for this sensor. Batches will often be
  * smaller, as the hardware fifo might be used for other sensors.
@@ -496,6 +499,7 @@
  * Returns true if this is a wake up sensor, false otherwise.
  */
 bool ASensor_isWakeUpSensor(ASensor const* sensor);
+#endif /* __ANDROID_API__ >= 21 */
 
 #ifdef __cplusplus
 };
diff --git a/include/android/trace.h b/include/android/trace.h
index e42e334..6cdcfeb 100644
--- a/include/android/trace.h
+++ b/include/android/trace.h
@@ -19,11 +19,14 @@
 #define ANDROID_NATIVE_TRACE_H
 
 #include <stdbool.h>
+#include <sys/cdefs.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+#if __ANDROID_API__ >= 23
+
 /**
  * Returns true if tracing is enabled. Use this signal to avoid expensive computation only necessary
  * when tracing is enabled.
@@ -48,6 +51,8 @@
  */
 void ATrace_endSection();
 
+#endif /* __ANDROID_API__ >= 23 */
+
 #ifdef __cplusplus
 };
 #endif