9, armeabi 不支持
8, 将so编入jni的不同abi
7, 引入多个静态库
通过LOCAL_LDFLAGS :=xx.a之间指点需要添加的静态库.
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_LDLIBS := -lm -llog
LOCAL_MODULE := xyttcore
MY_CPP_LIST := $(wildcard $(LOCAL_PATH)/*.c)
MY_CPP_LIST += $(wildcard $(LOCAL_PATH)/engine/*.c)
MY_CPP_LIST += $(wildcard $(LOCAL_PATH)/processer/*.c)
MY_CPP_LIST += $(wildcard $(LOCAL_PATH)/processer/nano/*.c)
LOCAL_SRC_FILES := $(MY_CPP_LIST:$(LOCAL_PATH)/%=%)
LOCAL_LDFLAGS := $(LOCAL_PATH)/libs/lib32/libCNG_32.a
LOCAL_LDFLAGS += $(LOCAL_PATH)/libs/lib32/libfeedbackProcess-vendor_32.a
LOCAL_LDFLAGS += $(LOCAL_PATH)/libs/lib32/libMsbcDecoder_32.a
LOCAL_LDFLAGS += $(LOCAL_PATH)/libs/lib32/libsbcSTEREO_32.a
LOCAL_LDFLAGS += $(LOCAL_PATH)/libs/lib32/libwnmscEncoder_32.a
LOCAL_LDFLAGS += $(LOCAL_PATH)/libs/lib32/libWnvcDecoder160320_StereoEncoder320_32.a
include $(BUILD_SHARED_LIBRARY)
6, 参考集
5, 使用已有的静态库或动态库
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := thirdlib1 # name it whatever
LOCAL_SRC_FILES := $(TARGET_ARCH_ABI)/libthird1.a # or $(so_path)/libthird1.so
#LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_STATIC_LIBRARY) #or PREBUILT_SHARED_LIBRARY
include $(CLEAR_VARS)
LOCAL_MODULE := mylib_use_thirdlib
LOCAL_SRC_FILES := src.c
LOCAL_STATIC_LIBRARIES := thirdlib1 #or LOCAL_SHARED_LIBRARY
include $(BUILD_SHARED_LIBRARY) #如果编译静态库,需要Application.mk
4, 编译动态库和静态库
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := mylib_static
LOCAL_SRC_FILES := src.c
include $(BUILD_STATIC_LIBRARY)
include $(CLEAR_VARS)
LOCAL_MODULE := mylib_shared
LOCAL_SRC_FILES := src2.c
LOCAL_STATIC_LIBRARIES := mylib_static
include $(BUILD_SHARED_LIBRARY)
3, 动态库编译
2, 在工程中单独编译静态库
1, 让androidstudio 支持c/cpp代码格式化和跳转
在build.gradle里添加
android {
externalNativeBuild {
ndkBuild {
path 'src/main/jni/Android.mk'
}
}
}
碰到的问题:
1, 使用第三方提供的so库编如jni工程.编译正常 , 运行时出现如下报错.
解决参考
参考2
参考3
java.lang.UnsatisfiedLinkError: dlopen failed: library "libc++.so" not found
操作:
在/system/lib/下libc++.so和libhello.so都存在但是APK却不能使用,这就是本文前沿描述的权限问题。
在本文中,解决错误的办法是从Android系统或源码中将将libc++.so拷贝出来,与libhello.so一样将libc++.so拷贝到jniLibs/armeabi目录下(与libhello.so放在一起):