尝试为安卓编译时出错"'JNIEXPORT' does not name a type"

Error "'JNIEXPORT' does not name a type" while trying to compile for Android

本文关键字：does JNIEXPORT not name type 编译 出错      更新时间：2023-10-16

我试图用NDK编译c++代码在Android上使用。然而，当我尝试编译时，我得到了这个错误:

error: 'JNIEXPORT' does not name a type (File: JNIApi.h, line: 9)
error: 'JNIEXPORT' does not name a type (File: JNIApi.h, line: 10)

JNIApi.h如下所示:

#pragma once
extern "C"
{
    JNIEXPORT void JNICALL Java_com_manabreak_tremortest_TremorLauncher_initTremor(JNIEnv* jenv, jobject obj);
    JNIEXPORT void JNICALL Java_com_manabreak_tremortest_TremorLauncher_setSurface(JNIEnv* jenv, jobject obj, jobject surface);
}

构建过程输出如下:

Build started 1.8.2014 11:14:17.
   1>Project "E:TremorbuildTremor.vcxproj" on node 2 (Build target(s)).
   1>ClCompile:
       E:ADTndktoolchainsarm-linux-androideabi-4.8prebuiltwindows-x86_64binarm-linux-androideabi-g++.exe JNIApi.cpp
       E:ADTndktoolchainsarm-linux-androideabi-4.8prebuiltwindows-x86_64binarm-linux-androideabi-g++.exe -o Android/Debug/JNIApi.o -marm -fno-strict-aliasing -funswitch-loops -finline-limit=100 -fomit-frame-pointer -fno-exceptions -fpic -fstack-protector -fno-rtti -fno-short-enums -x c++ -Wno-psabi -IE:/ADT/ndk/platforms/android-19/arch-arm/usr/include -IE:/ADT/ndk/sources/cxx-stl/gnu-libstdc++/4.8/include -IE:/ADT/ndk/sources/cxx-stl/gnu-libstdc++/4.8/libs/armeabi-v7a/include -DANDROID_NDK -DANDROID -D__ANDROID__ -D__ARM_EABI__ -D__ARM_ARCH_7__ -D__ARM_ARCH_7A__ -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -O0 -g -std=c++11 -march=armv7-a -mtune=xscale -c -MD ../src/platforms/android/JNIApi.cpp
     TRApplicationContext.cpp
     E:ADTndktoolchainsarm-linux-androideabi-4.8prebuiltwindows-x86_64binarm-linux-androideabi-g++.exe -o Android/Debug/TRApplicationContext.o -marm -fno-strict-aliasing -funswitch-loops -finline-limit=100 -fomit-frame-pointer -fno-exceptions -fpic -fstack-protector -fno-rtti -fno-short-enums -x c++ -Wno-psabi -IE:/ADT/ndk/platforms/android-19/arch-arm/usr/include -IE:/ADT/ndk/sources/cxx-stl/gnu-libstdc++/4.8/include -IE:/ADT/ndk/sources/cxx-stl/gnu-libstdc++/4.8/libs/armeabi-v7a/include -DANDROID_NDK -DANDROID -D__ANDROID__ -D__ARM_EABI__ -D__ARM_ARCH_7__ -D__ARM_ARCH_7A__ -D__ARM_ARCH_5__ -D__ARM_ARCH_5T__ -D__ARM_ARCH_5E__ -D__ARM_ARCH_5TE__ -O0 -g -std=c++11 -march=armv7-a -mtune=xscale -c -MD ../src/platforms/android/TRApplicationContext.cpp
     E:TremorsrcplatformsandroidTRApplicationContext.cpp(3): includes this header: 0:
   1>E:TremorsrcplatformsandroidJNIApi.h(9,2): error : 'JNIEXPORT' does not name a type
       JNIEXPORT void JNICALL Java_com_manabreak_tremortest_TremorLauncher_initTremor(JNIEnv* jenv, jobject obj);
       ^
   1>E:TremorsrcplatformsandroidJNIApi.h(10,2): error : 'JNIEXPORT' does not name a type
       JNIEXPORT void JNICALL Java_com_manabreak_tremortest_TremorLauncher_setSurface(JNIEnv* jenv, jobject obj, jobject surface);
       ^
   1>Done Building Project "E:TremorbuildTremor.vcxproj" (Build target(s)) -- FAILED.
Build FAILED.
Time Elapsed 00:00:00.52

必须包含JNI头文件:

#include <jni.h>

这将定义宏JNIEXPORT和JNICALL，更不用说JNI所需的所有其他类型等。

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