add .mk files

在build.gradle中指定
android {
    externalNativeBuild {
        ndkBuild {
            path 'src/main/jni/Android.mk'
        }
    }
}
Application.mk和Android.mk放在一个目录下即可

Author: Mainvooid

Android.mk

@@ -0,0 +1,18 @@
+LOCAL_PATH:=$(call my-dir)
+
+include $(CLEAR_VARS)
+OPENCV_LIB_TYPE :=STATIC
+
+ifeq ("$(wildcard $(OPENCV_MK_PATH))","")
+include $(LOCAL_PATH)/native/jni/OpenCV.mk
+else
+include $(OPENCV_MK_PATH)
+endif
+
+LOCAL_MODULE := opencv3
+LOCAL_LDLIBS += -llog -ljnigraphics
+LOCAL_SRC_FILES := opencv3.cpp
+include $(BUILD_SHARED_LIBRARY)
+
+#LOCAL_SRC_FILES := opencv3.so
+#include $(PREBUILT_SHARED_LIBRARY)

Application.mk

@@ -0,0 +1,5 @@
+APP_STL := gnustl_static
+APP_CPPFLAGS := -frtti -fexceptions
+APP_PLATFORM := android-21
+APP_ABI += armeabi-v7a
+