使用静态库的Android NDK - >函数尚未声明

Question

我正在测试Android应用程序中的集成静态库。 不幸的是编译不起作用！你能帮我吗？

我总是得到错误：

jni/main-jni.cpp: In function 'jint Java_com_tmz_cc_MainActivity_test1(JNIEnv*,  jobject)': jni/main-jni.cpp:10:23: error: 'FileSync' has not been declared 
make: *** [obj/local/armeabi/objs/ccSharedLib/main-jni.o] Error 1 

我想通过链接将是 “FileSync” 之称。

考虑以下几点：

project 
+- .. 
+-jni 
    +- include 
    +- prebuild 
    +- libFileSync.a 
    +- Android.mk 
    +- main-jni.cpp 

Android.mk

LOCAL_PATH:= $(call my-dir) 

include $(CLEAR_VARS) 
LOCAL_MODULE := fileSyncStaticLibrary 
LOCAL_SRC_FILES := prebuild/libFileSync.a 
LOCAL_EXPORT_C_INCLUDES := include/ 
include $(PREBUILT_STATIC_LIBRARY) 


include $(CLEAR_VARS) 
LOCAL_MODULE := ccSharedLib 
LOCAL_SRC_FILES := main-jni.cpp 
LOCAL_STATIC_LIBRARIES := fileSyncStaticLibrary 
include $(BUILD_SHARED_LIBRARY) 

主jni.cpp

#include <jni.h> 
#include <stdio.h> 

extern "C" { 

jint Java_com_tmz_cc_MainActivity_test1(JNIEnv* env, jobject thiz) { 


    //FileSync *file = new FileSync("connection"); 
    jstring seperator = FileSync::getPathSeperator(); 

    jint temp = 0; 
    return temp; 
} 

jint Java_com_tmz_cc_MainActivity_test2(JNIEnv* env, jobject thiz) { 

    jint temp = 0; 
    return temp; 
} 

} 

错误：

"Compile++ thumb : ccSharedLib <= main-jni.cpp 
Reaping winning child 0x012d6098 PID 19632680 
Cleaning up temp batch file C:\Users\jpenning\AppData\Local\Temp\make4148-1.bat 
CreateProcess(C:\android\ndk\toolchains\arm-linux-androideabi-4.6\prebuilt\windows\bin\arm-linux-androideabi-g++.exe,C:/android/ndk/toolchains/arm-linux-androideabi-4.6/prebuilt/windows/bin/arm-linux-androideabi-g++ -MMD -MP -MF ./obj/local/armeabi/objs/ccSharedLib/main-jni.o.d -fpic -ffunction-sections -funwind-tables -fstack-protector -no-canonical-prefixes -march=armv5te -mtune=xscale -msoft-float -fno-exceptions -fno-rtti -mthumb -Os -g -DNDEBUG -fomit-frame-pointer -fno-strict-aliasing -finline-limit=64 -Iinclude/ -IC:/android/ndk/sources/cxx-stl/system/include -Ijni -DANDROID -Wa,--noexecstack -IC:/android/ndk/platforms/android-14/arch-arm/usr/include -c jni/main-jni.cpp -o ./obj/local/armeabi/objs/ccSharedLib/main-jni.o,...) 
Live child 0x12d6098 (obj/local/armeabi/objs/ccSharedLib/main-jni.o) PID 19632680 
jni/main-jni.cpp: In function 'jint Java_com_tmz_cc_MainActivity_test1(JNIEnv*, jobject)': 
jni/main-jni.cpp:10:23: error: 'FileSync' has not been declared 
make: *** [obj/local/armeabi/objs/ccSharedLib/main-jni.o] Error 1 
Reaping losing child 0x12d6098 PID 19632680 
Removing child 0x12d6098 PID 19632680 from chain. 

Answer 1

必须包括正确的头文件，例如#include <FileSync.h>，在main-jni.cpp内。