diff --git a/Makefile b/Makefile
index 9cbccd8d14..5a27960ea8 100644
--- a/Makefile
+++ b/Makefile
@@ -80,7 +80,11 @@ endif
 # Make sure the all target is the first one
 all: libraries binaries
 
-include $(SRC_PATH)build/platform-$(OS).mk
+ifeq ($(findstring android-ndk-r18, $(NDKROOT)), android-ndk-r18)
+    include $(SRC_PATH)build/platform-android-r18b.mk
+else
+    include $(SRC_PATH)build/platform-$(OS).mk
+endif
 
 MODULE := $(LIBPREFIX)$(MODULE_NAME).$(SHAREDLIBSUFFIX)
 
diff --git a/build/platform-android-r18b.mk b/build/platform-android-r18b.mk
new file mode 100644
index 0000000000..0c442dfac1
--- /dev/null
+++ b/build/platform-android-r18b.mk
@@ -0,0 +1,138 @@
+ARCH = arm
+include $(SRC_PATH)build/arch.mk
+SHAREDLIBSUFFIX = so
+# Android APK/JARs expect libraries to be unversioned
+SHAREDLIBSUFFIXFULLVER=$(SHAREDLIBSUFFIX)
+SHAREDLIBSUFFIXMAJORVER=$(SHAREDLIBSUFFIX)
+SHLDFLAGS =
+NDKLEVEL = 12
+ifeq ($(ARCH), arm)
+  ifneq ($(APP_ABI), armeabi)
+    CFLAGS += -march=armv7-a -mfloat-abi=softfp
+    CFLAGS += -mfpu=vfpv3-d16
+    LDFLAGS += -march=armv7-a -Wl,--fix-cortex-a8
+    APP_ABI = armeabi-v7a
+  endif
+else ifeq ($(ARCH), arm64)
+  APP_ABI = arm64-v8a
+else ifeq ($(ARCH), x86)
+  APP_ABI = x86
+  ifeq (Yes, $(USE_ASM))
+    ASMFLAGS += -f elf
+  endif
+else ifeq ($(ARCH), x86_64)
+  APP_ABI = x86_64
+  ifeq (Yes, $(USE_ASM))
+    ASMFLAGS += -f elf64
+  endif
+else
+  APP_ABI = $(ARCH)
+endif
+
+ifndef NDKROOT
+$(error NDKROOT is not set)
+endif
+ifndef TARGET
+$(error TARGET is not set)
+endif
+
+TOOLCHAINPREFIX = $(shell NDK_PROJECT_PATH=$(SRC_PATH)/codec/build/android/dec make --no-print-dir -f $(NDKROOT)/build/core/build-local.mk DUMP_TOOLCHAIN_PREFIX APP_ABI=$(APP_ABI))
+TOOLCHAIN_NAME = $(shell NDK_TOOLCHAIN_VERSION= NDK_PROJECT_PATH=$(SRC_PATH)/codec/build/android/dec make --no-print-dir -f $(NDKROOT)/build/core/build-local.mk DUMP_TOOLCHAIN_NAME APP_ABI=$(APP_ABI))
+GCC_TOOLCHAIN_PATH = $(shell dirname $(TOOLCHAINPREFIX) | xargs dirname )
+
+SYSROOT = $(NDKROOT)/platforms/android-$(NDKLEVEL)/arch-$(ARCH)
+CXX = $(TOOLCHAINPREFIX)g++
+CC = $(TOOLCHAINPREFIX)gcc
+AR = $(TOOLCHAINPREFIX)ar
+CFLAGS += -DANDROID_NDK -fpic --sysroot=$(SYSROOT) -MMD -MP
+ifeq ($(USE_STACK_PROTECTOR), Yes)
+CFLAGS += -fstack-protector-all
+endif
+CFLAGS += -isystem $(NDKROOT)/sysroot/usr/include -isystem $(NDKROOT)/sysroot/usr/include/$(TOOLCHAIN_NAME) -D__ANDROID_API__=$(NDKLEVEL)
+CXXFLAGS += -fno-rtti -fno-exceptions
+LDFLAGS += --sysroot=$(SYSROOT)
+SHLDFLAGS = -Wl,--no-undefined -Wl,-z,relro -Wl,-z,now -Wl,-soname,lib$(PROJECT_NAME).so
+UTSHLDFLAGS = -Wl,-soname,libut.so
+
+ifeq ($(NDK_TOOLCHAIN_VERSION), clang)
+  HOST_OS = $(shell uname -s | tr [A-Z] [a-z])
+  LLVM_INSTALL_DIR = $(NDKROOT)/toolchains/llvm/prebuilt/$(HOST_OS)-x86_64/bin
+  CC = $(LLVM_INSTALL_DIR)/clang
+  CXX = $(LLVM_INSTALL_DIR)/clang++
+
+  ifeq ($(ARCH), arm)
+    TARGET_NAME = armv7-none-linux-androideabi
+  else ifeq ($(ARCH), arm64)
+    TARGET_NAME = aarch64-none-linux-android
+  else ifeq ($(ARCH), x86)
+    TARGET_NAME = i686-none-linux-android
+  else ifeq ($(ARCH), x86_64)
+    TARGET_NAME = x86_64-none-linux-android
+  else
+    $(error "does not support this arch now!")
+  endif
+
+  CFLAGS += -target $(TARGET_NAME)
+  LDFLAGS += -target $(TARGET_NAME) -gcc-toolchain $(GCC_TOOLCHAIN_PATH)
+endif
+
+# background reading: https://android.googlesource.com/platform/ndk/+/master/docs/BuildSystemMaintainers.md#unwinding
+LDFLAGS += -Wl,--exclude-libs,libgcc.a -Wl,--exclude-libs,libunwind.a
+
+ifneq ($(findstring /,$(CXX)),$(findstring \,$(CXX)))
+ifneq ($(CXX),$(wildcard $(CXX)))
+ifneq ($(CXX).exe,$(wildcard $(CXX).exe))
+$(error Compiler not found, bad NDKROOT or ARCH?)
+endif
+endif
+endif
+
+ifeq ($(NDK_TOOLCHAIN_VERSION), clang)
+STL_INCLUDES = \
+    -I$(NDKROOT)/sources/cxx-stl/llvm-libc++/include \
+    -I$(NDKROOT)/sources/cxx-stl/llvm-libc++abi/include
+STL_LIB = \
+    $(NDKROOT)/sources/cxx-stl/llvm-libc++/libs/$(APP_ABI)/libc++_static.a
+else
+STL_INCLUDES = \
+    -I$(NDKROOT)/sources/cxx-stl/stlport/stlport
+STL_LIB = \
+    $(NDKROOT)/sources/cxx-stl/stlport/libs/$(APP_ABI)/libstlport_static.a
+endif
+
+GTEST_INCLUDES = $(STL_INCLUDES)
+CODEC_UNITTEST_INCLUDES = $(STL_INCLUDES)
+CODEC_UNITTEST_LDFLAGS_SUFFIX = $(STL_LIB)
+MODULE_INCLUDES = $(STL_INCLUDES)
+MODULE_LDFLAGS = $(STL_LIB)
+
+ifeq (./,$(SRC_PATH))
+binaries: decdemo encdemo
+
+decdemo: libraries
+	cd ./codec/build/android/dec && $(NDKROOT)/ndk-build -B NDK_TOOLCHAIN_VERSION=$(NDK_TOOLCHAIN_VERSION) APP_ABI=$(APP_ABI) APP_PLATFORM=$(TARGET) && android update project -t $(TARGET) -p . && ant debug
+
+encdemo: libraries
+	cd ./codec/build/android/enc && $(NDKROOT)/ndk-build -B NDK_TOOLCHAIN_VERSION=$(NDK_TOOLCHAIN_VERSION) APP_ABI=$(APP_ABI) APP_PLATFORM=$(TARGET) && android update project -t $(TARGET) -p . && ant debug
+
+clean_Android: clean_Android_dec clean_Android_enc
+
+clean_Android_dec:
+	-cd ./codec/build/android/dec && $(NDKROOT)/ndk-build APP_ABI=$(APP_ABI) clean && ant clean
+clean_Android_enc:
+	-cd ./codec/build/android/enc && $(NDKROOT)/ndk-build APP_ABI=$(APP_ABI) clean && ant clean
+else
+clean_Android:
+	@:
+endif
+
+COMMON_INCLUDES += -I$(NDKROOT)/sources/android/cpufeatures
+COMMON_OBJS += $(COMMON_SRCDIR)/src/cpu-features.$(OBJ)
+
+COMMON_CFLAGS += \
+	-Dandroid_getCpuIdArm=wels_getCpuIdArm -Dandroid_setCpuArm=wels_setCpuArm \
+	-Dandroid_getCpuCount=wels_getCpuCount -Dandroid_getCpuFamily=wels_getCpuFamily \
+	-Dandroid_getCpuFeatures=wels_getCpuFeatures -Dandroid_setCpu=wels_setCpu \
+
+codec/common/src/cpu-features.$(OBJ): $(NDKROOT)/sources/android/cpufeatures/cpu-features.c
+	$(QUIET_CC)$(CC) $(CFLAGS) $(INCLUDES) $(COMMON_CFLAGS) $(COMMON_INCLUDES) -c $(CXX_O) $<