使用NDK编译Google Protocol Buffer

NDK编译c++代码的流程请参考别处。只要配置好了NDK的环境，那个jni文件夹是否建立在Android studio或者eclipse等开发工具建立的工程中不是必要的。关键是源代码要放在这个名称的文件夹下，以及两个文件的内容：Application.mk和Android.mk

Application.mk

APP_STL := gnustl_static
APP_ABI := x86
APP_PROJECT_PATH := ./
APP_BUILD_SCRIPT := ./Android.mk

如果APP_STL不设置为gnustl_static，会提示找不到标准库的引用。我需要在x86的模拟器下使用，所以APP_ABI设置为x86

Android.mk

这个比较长啊，我下载protobuffer版本是2.6.1，而且是x86架构，比这里copy的内容有所删减：

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
CC_LITE_SRC_FILES := \
src/google/protobuf/stubs/common.cc \
src/google/protobuf/stubs/once.cc \
src/google/protobuf/stubs/stringprintf.cc \ #编译错误追加的
src/google/protobuf/stubs/atomicops_internals_x86_gcc.cc \ #这个也是编译错误后追加
src/google/protobuf/extension_set.cc \
src/google/protobuf/generated_message_util.cc \
src/google/protobuf/message_lite.cc \
src/google/protobuf/repeated_field.cc \
src/google/protobuf/wire_format_lite.cc \
src/google/protobuf/io/coded_stream.cc \
src/google/protobuf/io/zero_copy_stream.cc \
src/google/protobuf/io/zero_copy_stream_impl_lite.cc \
src/google/protobuf/io/strtod.cc

COMPILER_SRC_FILES := \
src/google/protobuf/descriptor.cc \
src/google/protobuf/descriptor.pb.cc \
src/google/protobuf/descriptor_database.cc \
src/google/protobuf/dynamic_message.cc \
src/google/protobuf/extension_set.cc \
src/google/protobuf/extension_set_heavy.cc \
src/google/protobuf/generated_message_reflection.cc \
src/google/protobuf/generated_message_util.cc \
src/google/protobuf/message.cc \
src/google/protobuf/message_lite.cc \
src/google/protobuf/reflection_ops.cc \
src/google/protobuf/repeated_field.cc \
src/google/protobuf/service.cc \
src/google/protobuf/text_format.cc \
src/google/protobuf/unknown_field_set.cc \
src/google/protobuf/wire_format.cc \
src/google/protobuf/wire_format_lite.cc \
src/google/protobuf/compiler/code_generator.cc \
src/google/protobuf/compiler/command_line_interface.cc \
src/google/protobuf/compiler/importer.cc \
src/google/protobuf/compiler/main.cc \
src/google/protobuf/compiler/parser.cc \
src/google/protobuf/compiler/plugin.cc \
src/google/protobuf/compiler/plugin.pb.cc \
src/google/protobuf/compiler/subprocess.cc \
src/google/protobuf/compiler/zip_writer.cc \
src/google/protobuf/compiler/cpp/cpp_enum.cc \
src/google/protobuf/compiler/cpp/cpp_enum_field.cc \
src/google/protobuf/compiler/cpp/cpp_extension.cc \
src/google/protobuf/compiler/cpp/cpp_field.cc \
src/google/protobuf/compiler/cpp/cpp_file.cc \
src/google/protobuf/compiler/cpp/cpp_generator.cc \
src/google/protobuf/compiler/cpp/cpp_helpers.cc \
src/google/protobuf/compiler/cpp/cpp_message.cc \
src/google/protobuf/compiler/cpp/cpp_message_field.cc \
src/google/protobuf/compiler/cpp/cpp_primitive_field.cc \
src/google/protobuf/compiler/cpp/cpp_service.cc \
src/google/protobuf/compiler/cpp/cpp_string_field.cc \
src/google/protobuf/compiler/java/java_enum.cc \
src/google/protobuf/compiler/java/java_enum_field.cc \
src/google/protobuf/compiler/java/java_extension.cc \
src/google/protobuf/compiler/java/java_field.cc \
src/google/protobuf/compiler/java/java_file.cc \
src/google/protobuf/compiler/java/java_generator.cc \
src/google/protobuf/compiler/java/java_helpers.cc \
src/google/protobuf/compiler/java/java_message.cc \
src/google/protobuf/compiler/java/java_message_field.cc \
src/google/protobuf/compiler/java/java_primitive_field.cc \
src/google/protobuf/compiler/java/java_service.cc \
src/google/protobuf/compiler/javamicro/javamicro_enum.cc \
src/google/protobuf/compiler/javamicro/javamicro_enum_field.cc \
src/google/protobuf/compiler/javamicro/javamicro_field.cc \
src/google/protobuf/compiler/javamicro/javamicro_file.cc \
src/google/protobuf/compiler/javamicro/javamicro_generator.cc \
src/google/protobuf/compiler/javamicro/javamicro_helpers.cc \
src/google/protobuf/compiler/javamicro/javamicro_message.cc \
src/google/protobuf/compiler/javamicro/javamicro_message_field.cc \
src/google/protobuf/compiler/javamicro/javamicro_primitive_field.cc \
src/google/protobuf/compiler/python/python_generator.cc \
src/google/protobuf/io/coded_stream.cc \
src/google/protobuf/io/gzip_stream.cc \
src/google/protobuf/io/printer.cc \
src/google/protobuf/io/tokenizer.cc \
src/google/protobuf/io/zero_copy_stream.cc \
src/google/protobuf/io/zero_copy_stream_impl.cc \
src/google/protobuf/io/zero_copy_stream_impl_lite.cc \
src/google/protobuf/stubs/common.cc \
src/google/protobuf/stubs/hash.cc \
src/google/protobuf/stubs/once.cc \
src/google/protobuf/stubs/structurally_valid.cc \
src/google/protobuf/stubs/strutil.cc \
src/google/protobuf/stubs/substitute.cc

# C++ full library
# =======================================================
#include $(CLEAR_VARS)

LOCAL_MODULE := libprotobuf
LOCAL_MODULE_TAGS := optional

LOCAL_CPP_EXTENSION := .cc

LOCAL_SRC_FILES := \
$(CC_LITE_SRC_FILES) \
src/google/protobuf/stubs/strutil.cc \
src/google/protobuf/stubs/substitute.cc \
src/google/protobuf/stubs/structurally_valid.cc \
src/google/protobuf/descriptor.cc \
src/google/protobuf/descriptor.pb.cc \
src/google/protobuf/descriptor_database.cc \
src/google/protobuf/dynamic_message.cc \
src/google/protobuf/extension_set_heavy.cc \
src/google/protobuf/generated_message_reflection.cc \
src/google/protobuf/message.cc \
src/google/protobuf/reflection_ops.cc \
src/google/protobuf/service.cc \
src/google/protobuf/text_format.cc \
src/google/protobuf/unknown_field_set.cc \
src/google/protobuf/wire_format.cc \
src/google/protobuf/io/gzip_stream.cc \
src/google/protobuf/io/printer.cc \
src/google/protobuf/io/tokenizer.cc \
src/google/protobuf/io/zero_copy_stream_impl.cc \
src/google/protobuf/compiler/importer.cc \
src/google/protobuf/compiler/parser.cc

LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/src

LOCAL_C_INCLUDES := \
$(LOCAL_PATH)/android \
bionic \
$(LOCAL_PATH)/src \
$(JNI_H_INCLUDE)

LOCAL_SHARED_LIBRARIES := \
libz libcutils libutils
LOCAL_LDLIBS := -lz
# stlport conflicts with the host stl library
ifneq ($(TARGET_SIMULATOR),true)
LOCAL_C_INCLUDES += external/stlport/stlport
LOCAL_SHARED_LIBRARIES += libstlport
endif

# Define the header files to be copied
#LOCAL_COPY_HEADERS := \
# src/google/protobuf/stubs/once.h \
# src/google/protobuf/stubs/common.h \
# src/google/protobuf/io/coded_stream.h \
# src/google/protobuf/generated_message_util.h \
# src/google/protobuf/repeated_field.h \
# src/google/protobuf/extension_set.h \
# src/google/protobuf/wire_format_lite_inl.h
#
#LOCAL_COPY_HEADERS_TO := $(LOCAL_MODULE)

LOCAL_CFLAGS := -DGOOGLE_PROTOBUF_NO_RTTI

include $(BUILD_SHARED_LIBRARY)

然后，没有了............