diff --git a/camera/ndk/impl/ACameraCaptureSession.cpp b/camera/ndk/impl/ACameraCaptureSession.cpp
index d6f1412..68db233 100644
--- a/camera/ndk/impl/ACameraCaptureSession.cpp
+++ b/camera/ndk/impl/ACameraCaptureSession.cpp
@@ -33,7 +33,9 @@
         dev->unlockDevice();
     }
     // Fire onClosed callback
-    (*mUserSessionCallback.onClosed)(mUserSessionCallback.context, this);
+    if (mUserSessionCallback.onClosed != nullptr) {
+        (*mUserSessionCallback.onClosed)(mUserSessionCallback.context, this);
+    }
     ALOGV("~ACameraCaptureSession: %p is deleted", this);
 }
 
diff --git a/camera/ndk/ndk_vendor/tests/AImageReaderVendorTest.cpp b/camera/ndk/ndk_vendor/tests/AImageReaderVendorTest.cpp
index 7ab0124..938b5f5 100644
--- a/camera/ndk/ndk_vendor/tests/AImageReaderVendorTest.cpp
+++ b/camera/ndk/ndk_vendor/tests/AImageReaderVendorTest.cpp
@@ -253,21 +253,9 @@
         return true;
     }
 
-    static void onDeviceDisconnected(void* /*obj*/, ACameraDevice* /*device*/) {}
-
-    static void onDeviceError(void* /*obj*/, ACameraDevice* /*device*/, int /*errorCode*/) {}
-
-    static void onSessionClosed(void* /*obj*/, ACameraCaptureSession* /*session*/) {}
-
-    static void onSessionReady(void* /*obj*/, ACameraCaptureSession* /*session*/) {}
-
-    static void onSessionActive(void* /*obj*/, ACameraCaptureSession* /*session*/) {}
-
    private:
-    ACameraDevice_StateCallbacks mDeviceCb{this, onDeviceDisconnected,
-                                           onDeviceError};
-    ACameraCaptureSession_stateCallbacks mSessionCb{
-        this, onSessionClosed, onSessionReady, onSessionActive};
+    ACameraDevice_StateCallbacks mDeviceCb{this, nullptr, nullptr};
+    ACameraCaptureSession_stateCallbacks mSessionCb{ this, nullptr, nullptr, nullptr};
 
     native_handle_t* mImgReaderAnw = nullptr;  // not owned by us.