我正在尝试使用 NDK 将 TagLib C++ 库 ( http://taglib.github.io/ ) 导入 Android。
/jni/taglibroot/通过将所有源代码放在下面的图片中，我能够成功编译库：
并ndk-build在/jni文件夹上运行。
但是，我还创建了tag_lib_personal.cpp下面的文件（使用 TagLib API）：
#include <jni.h>
/*#include <iostream>
#include <iomanip>*/
#include <stdio.h>
#include <taglibroot/taglib/fileref.h>
#include <taglibroot/taglib/tag.h>
#include <taglibroot/taglib/tpropertymap.h>
#ifdef __cplusplus
extern "C"
{
#endif
jstring Java_com_mindtherobot_samples_ndkfoo_NdkFooActivity_invokeNativeFunction(JNIEnv* env, jobject javaThis) {
TagLib::FileRef f(argv[i]);
if(!f.isNull() && f.audioProperties()) {
TagLib::AudioProperties *properties = f.audioProperties();
int seconds = properties->length() % 60;
int minutes = (properties->length() - seconds) / 60;
/*cout << "-- AUDIO --" << endl;
cout << "bitrate - " << properties->bitrate() << endl;
cout << "sample rate - " << properties->sampleRate() << endl;
cout << "channels - " << properties->channels() << endl;
cout << "length - " << minutes << ":" << formatSeconds(seconds) << endl;*/
}
return "hello world!";
//return (*env)->NewStringUTF(env, "Hello from native code!");
}
#ifdef __cplusplus
}
#endif
但我无法编译它。当我尝试ndk-build再次运行时，出现以下错误：
[armeabi] Compile++ arm : my_own_source_files <= tag_lib_personal.cpp
In file included from D:/blabla/eclipse-jee-indigo-SR2-win32-x86_64/workspace/Project//jni/tag_lib_personal.cpp:7:0:
D:/blabla/eclipse-jee-indigo-SR2-win32-x86_64/workspace/Project//jni/taglibroot/taglib/fileref.h:29:19: fatal error: tfile.h: No such file or directory
compilation terminated.
make.exe: *** [D:/blabla/eclipse-jee-indigo-SR2-win32-x86_64/workspace/Project//obj/local/armeabi/objs/my_own_source_files/tag_lib_personal.o] Error 1
该错误表明它无法从 TagLib 库中找到一些 .h 文件。这是我的Android.mk文件：
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := taglib_module
FILE_LIST := $(wildcard $(LOCAL_PATH)/taglibroot/*.cpp) #Based on: http://stackoverflow.com/a/8980441
LOCAL_SRC_FILES := $(FILE_LIST:$(LOCAL_PATH)/%=%)
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/foo
LOCAL_EXPORT_CFLAGS := -DFOO=1
LOCAL_EXPORT_LDLIBS := -llog
LOCAL_ARM_MODE := arm
include $(BUILD_SHARED_LIBRARY)
# If I run ndk-build only on the above code, it compiles the TagLib library successfully and generates the .so files as expected
include $(CLEAR_VARS)
LOCAL_MODULE := my_own_source_files
LOCAL_SHARED_LIBRARIES := taglib_module
LOCAL_SRC_FILES := tag_lib_personal.cpp
LOCAL_C_INCLUDES := $(LOCAL_PATH)/taglibroot/taglib,\
$(LOCAL_PATH)/taglibroot/taglib/ape,\
$(LOCAL_PATH)/taglibroot/taglib/asf,\
$(LOCAL_PATH)/taglibroot/taglib/flac,\
$(LOCAL_PATH)/taglibroot/taglib/it,\
$(LOCAL_PATH)/taglibroot/taglib/mod,\
$(LOCAL_PATH)/taglibroot/taglib/mp4,\
$(LOCAL_PATH)/taglibroot/taglib/mpc,\
$(LOCAL_PATH)/taglibroot/taglib/mpeg,\
$(LOCAL_PATH)/taglibroot/taglib/mpeg/id3v1,\
$(LOCAL_PATH)/taglibroot/taglib/mpeg/id3v2,\
$(LOCAL_PATH)/taglibroot/taglib/mpeg/id3v2/frames,\
$(LOCAL_PATH)/taglibroot/taglib/ogg,\
$(LOCAL_PATH)/taglibroot/taglib/ogg/flac,\
$(LOCAL_PATH)/taglibroot/taglib/ogg/opus,\
$(LOCAL_PATH)/taglibroot/taglib/ogg/speex,\
$(LOCAL_PATH)/taglibroot/taglib/ogg/vorbis,\
$(LOCAL_PATH)/taglibroot/taglib/riff,\
$(LOCAL_PATH)/taglibroot/taglib/riff/aiff,\
$(LOCAL_PATH)/taglibroot/taglib/riff/wav,\
$(LOCAL_PATH)/taglibroot/taglib/s3m,\
$(LOCAL_PATH)/taglibroot/taglib/toolkit,\
$(LOCAL_PATH)/taglibroot/taglib/trueaudio,\
$(LOCAL_PATH)/taglibroot/taglib/wavpack,\
$(LOCAL_PATH)/taglibroot/taglib/xm
LOCAL_ARM_MODE := arm
include $(BUILD_SHARED_LIBRARY)
如您所见，我将 TagLib 库的每个目录都放在了LOCAL_EXPORT_C_INCLUDES指令中，其中至少有一个 .h 文件，但由于某种原因它仍然找不到tfile.h（在里面$(LOCAL_PATH)/taglibroot/taglib/toolkit）。我错过了什么？