D:/AS/AndroidSdk/ndk/19.2.534560

今天用jni编译so库一直报错

D:\AS\AndroidSdk\ndk\19.2.5345600\ndk-build.cmd
Android NDK: WARNING: APP_PLATFORM android-19 is higher than android:minSdkVersion 1 in ./AndroidManifest.xml. NDK binaries will *not* be compatible with devices older than android-19. See https://android.googlesource.com/platform/ndk/+/master/docs/user/common_problems.md for more information.    
D:/AS/AndroidSdk/ndk/19.2.5345600/build//../build/core/build-static-library.mk:26: *** Android NDK: Aborting    .  Stop.
Android NDK: jni/Android.mk:FreeTypeLibs: LOCAL_MODULE_FILENAME must not contain a file extension    

Process finished with exit code 2

查了下发现Android.mk写的两行不同同时存在

include $(BUILD_SHARED_LIBRARY)//编译动态.so库
include $(BUILD_STATIC_LIBRARY)//编译静态.a库

解决办法去掉其中一句，即需要编译动态库还是静态库，一个一个来就行
最后
Android.mk编译动态库.so库

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)

LOCAL_MODULE := FreeTypeLibs
LOCAL_SRC_FILES =: aMyTest.cpp
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../jni

LOCAL_LDLIBS +=  -lm -llog
include $(BUILD_SHARED_LIBRARY)

Android.mk编译动态库.a库

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)

LOCAL_MODULE := FreeTypeLibs
LOCAL_SRC_FILES =: aMyTest.cpp
LOCAL_C_INCLUDES := $(LOCAL_PATH)/../jni

LOCAL_LDLIBS +=  -lm -llog
include $(BUILD_STATIC_LIBRARY)

具体的jni编译步骤可查看之前的文章：https://www.jianshu.com/p/4485be6402d5