diff --git a/app/src/main/cpp/camera2/ndkcamera.cpp b/app/src/main/cpp/camera2/ndkcamera.cpp
index ee8203e2..0a701e4a 100644
--- a/app/src/main/cpp/camera2/ndkcamera.cpp
+++ b/app/src/main/cpp/camera2/ndkcamera.cpp
@@ -24,7 +24,7 @@
 
 static void onDisconnected(void* context, ACameraDevice* device)
 {
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "onDisconnected %p", device);
+    ALOGW("onDisconnected %p", device);
 }
 
 static void onError(void* context, ACameraDevice* device, int error)
@@ -41,32 +41,32 @@ static void onImageAvailable(void* context, AImageReader* reader)
 
 static void onSessionActive(void* context, ACameraCaptureSession *session)
 {
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "onSessionActive %p", session);
+    ALOGW("onSessionActive %p", session);
 }
 
 static void onSessionReady(void* context, ACameraCaptureSession *session)
 {
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "onSessionReady %p", session);
+    ALOGW("onSessionReady %p", session);
 }
 
 static void onSessionClosed(void* context, ACameraCaptureSession *session)
 {
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "onSessionClosed %p", session);
+    ALOGW("onSessionClosed %p", session);
 }
 
 void onCaptureFailed(void* context, ACameraCaptureSession* session, ACaptureRequest* request, ACameraCaptureFailure* failure)
 {
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "onCaptureFailed %p %p %p", session, request, failure);
+    ALOGW("onCaptureFailed %p %p %p", session, request, failure);
 }
 
 void onCaptureSequenceCompleted(void* context, ACameraCaptureSession* session, int sequenceId, int64_t frameNumber)
 {
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "onCaptureSequenceCompleted %p %d %ld", session, sequenceId, frameNumber);
+    ALOGW("onCaptureSequenceCompleted %p %d %ld", session, sequenceId, frameNumber);
 }
 
 void onCaptureSequenceAborted(void* context, ACameraCaptureSession* session, int sequenceId)
 {
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "onCaptureSequenceAborted %p %d", session, sequenceId);
+    ALOGW("onCaptureSequenceAborted %p %d", session, sequenceId);
 }
 
 void onCaptureCompleted(void* context, ACameraCaptureSession* session, ACaptureRequest* request, const ACameraMetadata* result)
@@ -116,7 +116,7 @@ NdkCamera::~NdkCamera()
 }
 
 int NdkCamera::open(const char* cameraId) {
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "DBG::open %s", cameraId);
+    ALOGW("DBG::open %s", cameraId);
 
     // camera_facing = _camera_facing;
 
@@ -320,7 +320,7 @@ int NdkCamera::open(const char* cameraId) {
         ANativeWindow_acquire(image_reader_surface);
     }
 
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "open %s %d", camera_id.c_str(), camera_orientation);
+    ALOGW("open %s %d", camera_id.c_str(), camera_orientation);
 
     // open camera
     {
@@ -471,13 +471,13 @@ void NdkCamera::close()
         ACameraManager_delete(camera_manager);
         camera_manager = 0;
 
-        __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "DBG::close %s", mCameraId.c_str());
+        ALOGW("DBG::close %s", mCameraId.c_str());
     }
 }
 
 void NdkCamera::onImageAvailable(AImageReader* reader)
 {
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "onImageAvailable %p", reader);
+    ALOGW("onImageAvailable %p", reader);
 
     AImage* image = 0;
     media_status_t status = AImageReader_acquireLatestImage(reader, &image);
@@ -588,7 +588,7 @@ bool NdkCamera::on_image(const cv::Mat& rgb)
 
 void NdkCamera::on_image(const unsigned char* nv21, int nv21_width, int nv21_height)
 {
-    __android_log_print(ANDROID_LOG_WARN, "NdkCamera", "nv21 size: %d x %d", nv21_width, nv21_height);
+    ALOGW("nv21 size: %d x %d", nv21_width, nv21_height);
     // rotate nv21
     int w = 0;
     int h = 0;