1 下载protobuf源码，我用的版本是2.6.0，并把google/protobuf 整个目录拷贝到src/main/jni目录下
2 修改config.h文件，如下：
#define HASH_MAP_H <ext/hash_map>
/* the namespace of hash_map/hash_set */
// Apparently Microsoft decided to move hash_map *back* to the std namespace
// in MSVC 2010:
// http://blogs.msdn.com/vcblog/archive/2009/05/25/stl-breaking-changes-in-visual-studio-2010-beta-1.aspx
// TODO(kenton): Use unordered_map instead, which is available in MSVC 2010.
#if _MSC_VER < 1310 || _MSC_VER >= 1600
#define HASH_NAMESPACE std
#else
#define HASH_NAMESPACE stdext
#endif
/* the location of <hash_set> */
#define HASH_SET_H <ext/hash_set>
#define HASH_NAMESPACE __gnu_cxx
/* define if the compiler has hash_map */
//#define HAVE_HASH_MAP 1
/* define if the compiler has hash_set */
//#define HAVE_HASH_SET 1
/* define if you want to use zlib. See readme.txt for additional
* requirements. */
// #define HAVE_ZLIB 1
#define HAVE_PTHREAD
3 添加Android.mk
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE := protobuf
LOCAL_CFLAGS := -std=c++11 -fexceptions -frtti
LOCAL_MODULE_FILENAME := libprotobuf
LOCAL_SRC_FILES := \
google/config.h \
google/protobuf/stubs/atomicops_internals_x86_gcc.cc \
google/protobuf/stubs/atomicops_internals_x86_msvc.cc \
google/protobuf/stubs/common.cc \
google/protobuf/stubs/once.cc \
google/protobuf/stubs/hash.h \
google/protobuf/stubs/map_util.h \
google/protobuf/stubs/shared_ptr.h \
google/protobuf/stubs/stringprintf.cc \
google/protobuf/stubs/stringprintf.h \
google/protobuf/extension_set.cc \
google/protobuf/generated_message_util.cc \
google/protobuf/message_lite.cc \
google/protobuf/repeated_field.cc \
google/protobuf/wire_format_lite.cc \
google/protobuf/io/coded_stream.cc \
google/protobuf/io/coded_stream_inl.h \
google/protobuf/io/zero_copy_stream.cc \
google/protobuf/io/zero_copy_stream_impl_lite.cc \
google/protobuf/stubs/strutil.cc \
google/protobuf/stubs/strutil.h \
google/protobuf/stubs/substitute.cc \
google/protobuf/stubs/substitute.h \
google/protobuf/stubs/structurally_valid.cc \
google/protobuf/descriptor.cc \
google/protobuf/descriptor.pb.cc \
google/protobuf/descriptor_database.cc \
google/protobuf/dynamic_message.cc \
google/protobuf/extension_set_heavy.cc \
google/protobuf/generated_message_reflection.cc \
google/protobuf/message.cc \
google/protobuf/reflection_ops.cc \
google/protobuf/service.cc \
google/protobuf/text_format.cc \
google/protobuf/unknown_field_set.cc \
google/protobuf/wire_format.cc \
google/protobuf/io/gzip_stream.cc \
google/protobuf/io/printer.cc \
google/protobuf/io/strtod.cc \
google/protobuf/io/tokenizer.cc \
google/protobuf/io/zero_copy_stream_impl.cc \
google/protobuf/compiler/importer.cc \
google/protobuf/compiler/parser.cc
LOCAL_EXPORT_C_INCLUDES :=
LOCAL_EXPORT_LDLIBS :=
LOCAL_C_INCLUDES := $(LOCAL_PATH)/google/config.h \
$(LOCAL_PATH)/src
LOCAL_LDLIBS := -llog -lz
include $(BUILD_SHARED_LIBRARY)
#include $(BUILD_STATIC_LIBRARY)
4 添加Appliction.mk
APP_MODULES := protobuf
APP_PLATFORM := android-19
APP_ABI := all
APP_STL := c++_static
APP_OPTIM := release
5 在jni目录下执行ndk-build即可。
