diff --git a/native-codec/app/src/main/cpp/CMakeLists.txt b/native-codec/app/src/main/cpp/CMakeLists.txt
index 86ffc238..3e8cd30c 100644
--- a/native-codec/app/src/main/cpp/CMakeLists.txt
+++ b/native-codec/app/src/main/cpp/CMakeLists.txt
@@ -1,15 +1,15 @@
 cmake_minimum_required(VERSION 3.22.1)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -UNDEBUG")
+include(AppLibrary)
 
-add_library(native-codec-jni SHARED
-            looper.cpp
-            native-codec-jni.cpp)
+add_app_library(native-codec-jni SHARED
+    looper.cpp
+    native-codec-jni.cpp
+)
 
-# Include libraries needed for native-codec-jni lib
 target_link_libraries(native-codec-jni
-                      android
-                      log
-                      mediandk
-                      OpenMAXAL)
-
+    android
+    log
+    mediandk
+    OpenMAXAL
+)
diff --git a/native-codec/app/src/main/cpp/native-codec-jni.cpp b/native-codec/app/src/main/cpp/native-codec-jni.cpp
index f4f99954..07fcf2da 100644
--- a/native-codec/app/src/main/cpp/native-codec-jni.cpp
+++ b/native-codec/app/src/main/cpp/native-codec-jni.cpp
@@ -199,7 +199,7 @@ void mylooper::handle(int what, void* obj) {
 extern "C" {
 
 jboolean Java_com_example_nativecodec_NativeCodec_createStreamingMediaPlayer(
-    JNIEnv* env, jclass clazz, jobject assetMgr, jstring filename) {
+    JNIEnv* env, jclass, jobject assetMgr, jstring filename) {
   LOGV("@@@ create");
 
   // convert Java string to UTF-8
@@ -269,7 +269,7 @@ jboolean Java_com_example_nativecodec_NativeCodec_createStreamingMediaPlayer(
 
 // set the playing state for the streaming media player
 void Java_com_example_nativecodec_NativeCodec_setPlayingStreamingMediaPlayer(
-    JNIEnv* env, jclass clazz, jboolean isPlaying) {
+    JNIEnv*, jclass, jboolean isPlaying) {
   LOGV("@@@ playpause: %d", isPlaying);
   if (mlooper) {
     if (isPlaying) {
@@ -281,8 +281,7 @@ void Java_com_example_nativecodec_NativeCodec_setPlayingStreamingMediaPlayer(
 }
 
 // shut down the native media system
-void Java_com_example_nativecodec_NativeCodec_shutdown(JNIEnv* env,
-                                                       jclass clazz) {
+void Java_com_example_nativecodec_NativeCodec_shutdown(JNIEnv*, jclass) {
   LOGV("@@@ shutdown");
   if (mlooper) {
     mlooper->post(kMsgDecodeDone, &data, true /* flush */);
@@ -297,8 +296,7 @@ void Java_com_example_nativecodec_NativeCodec_shutdown(JNIEnv* env,
 }
 
 // set the surface
-void Java_com_example_nativecodec_NativeCodec_setSurface(JNIEnv* env,
-                                                         jclass clazz,
+void Java_com_example_nativecodec_NativeCodec_setSurface(JNIEnv* env, jclass,
                                                          jobject surface) {
   // obtain a native window from a Java surface
   if (data.window) {
@@ -311,7 +309,7 @@ void Java_com_example_nativecodec_NativeCodec_setSurface(JNIEnv* env,
 
 // rewind the streaming media player
 void Java_com_example_nativecodec_NativeCodec_rewindStreamingMediaPlayer(
-    JNIEnv* env, jclass clazz) {
+    JNIEnv*, jclass) {
   LOGV("@@@ rewind");
   if (mlooper) {
     mlooper->post(kMsgSeek, &data);