本人在网上找了一些资料编写了一个jni库,用来显示yuv数据,里面用到了一些android源码的库文件如下:
#include <assert.h> #include <JNIHelp.h> #include <utils/Log.h> #include <gui/Surface.h> #include <cutils/properties.h> #include <ui/GraphicBufferMapper.h> #include <media/stagefright/foundation/ADebug.h> #include <android_runtime/android_view_Surface.h>
所以对Android.mk做了修改,包含Android源码 Android.mk内容如下:
LOCAL_PATH := $(call my-dir) include $(CLEAR_VARS) LOCAL_MODULE := showYUV MY_ANDROID_SOURCE = D:/Android/java_software/android_4.4 MY_ANDROID_SYSLIB = $(MY_ANDROID_SOURCE)/out/target/product/generic/system/lib MY_FILES_PATH := $(LOCAL_PATH) MY_FILES_SUFFIX := %.cpp %.c rwildcard=$(wildcard $1$2) $(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2)) MY_ALL_FILES := $(foreach src_path,$(MY_FILES_PATH), $(call rwildcard,$(src_path),*.*)) MY_ALL_FILES := $(MY_ALL_FILES:$(MY_CPP_PATH)/./%=$(MY_CPP_PATH)%) MY_SRC_LIST := $(filter $(MY_FILES_SUFFIX),$(MY_ALL_FILES)) MY_SRC_LIST := $(MY_SRC_LIST:$(LOCAL_PATH)/%=%) MY_ALL_DIRS := $(dir $(foreach src_path,$(MY_FILES_PATH), $(call rwildcard,$(src_path),*/))) MY_ALL_DIRS := $(call uniq,$(MY_ALL_DIRS)) LOCAL_SRC_FILES := $(MY_SRC_LIST) LOCAL_C_INCLUDES := $(MY_ALL_DIRS) LOCAL_CPPFLAGS += -fexceptions -DXLOCALE_NOT_USED=1 -DNULL=0 -DNO_SSTREAM=1 -UIP_ADD_SOURCE_MEMBERSHIP LOCAL_STATIC_LIBRARIES := \ libstagefright_color_conversion\ LOCAL_SHARED_LIBRARIES := \ libcutils \ libutils \ libbinder \ libui \ libgui \ libstagefright\ libstagefright_foundation LOCAL_C_INCLUDES += \ $(MY_ANDROID_SOURCE)/external/opencore/codecs_v2/video/mfc_c110/include \ $(MY_ANDROID_SOURCE)/libnativehelper/include/nativehelper \ $(MY_ANDROID_SOURCE)/frameworks/native/include \ $(MY_ANDROID_SOURCE)/frameworks/av/include \ $(MY_ANDROID_SOURCE)/frameworks/base/include \ $(MY_ANDROID_SOURCE)/hardware/libhardware/include \ $(MY_ANDROID_SOURCE)/system/core/include # for logging LOCAL_LDLIBS += -llog LOCAL_LDLIBS += -landroid -lstdc++ LOCAL_LDFLAGS += -fuse-ld=bfd //LOCAL_CXXFLAGS := -DHAVE_PTHREADS LOCAL_ALLOW_UNDEFINED_SYMBOLS := true include $(BUILD_SHARED_LIBRARY) $(call import-module,cpufeatures) $(warning $(LOCAL_SRC_FILES)) $(warning $(MY_INCLUDE_LIST))
编译通过生成so文件,但是在运行加载so文件时报错 java.lang.UnsatisfiedLinkError: dlopen failed: cannot locate symbol “_ZNK7android7RefBase9decStrongEPKv” 查了一下有的说是原因是android ndk版本太高导致的
本人的Android ndk版本是 ndk-r10 Android源码版本是4.4的 Android软件要多平台支持 从4.0~4.4的 所以本人想向各位质询一下这个问题怎么解决呢。
解决方案
15
_ZNK7android7RefBase9decStrongEPKv 这个是用到的函数是在2.2下面才可以使用,在2.2之后播放框架修改了,无法找到这个函数了。
15
提示很明确。用android NDK r8 或r9重编一下试试!