android嵌入lua
java嵌入lua有多种方案可选择，比如纯java的luaj 、纯C jni的 luajava还有个lua4j。在android中嵌入lua，我偏向使用luajava(当然面对除arm外的平台如x86、mips或需单独打包).
要使用luajava除了要下载luajava还要下载lua源码，需要注意的是luajava并不支持lua2.0以上的版本，我测试支持的版本是5.1.4,而且luajava中缺少头文件luajava.h(本文末提供该文件下载)。下载完后把lua和luajava的luajava.c和luajava.h解压到同一个文件夹，注意：把llex.c源文件的trydecpoint函数中的
ls->decpoint = (cv ? cv->decimal_point[0] : '.');
改为
ls->decpoint = '.';
不然编译不过。
实际项目中嵌入lua可能我们并不乐意让人轻易知道我们使用了lua。这就要编译so时不输出lua中的api和luajava的Java_org_keplerproject_luajava_LuaState_XXX函数。
关闭lua的api输出，可以在luaconf.h头文件中找到LUA_API宏
#define LUA_API extern
将它改为
#define LUA_API extern __attribute__((visibility("hidden")))
而要关闭luajava中输出函数，则需要把luajava中JNIEXPORT标识的函数去除JNIEXPORT，和在JNI_OnLoad中注册所有Java_org_keplerproject_luajava_LuaState_XXX函数(这种函数命名实在是丑陋！)。以下是我整理出来的函数(其中注释掉的函数是luajava中的作者并没有实现的).
static JNINativeMethod METHOD_LUASTATE[]={
{"_open", "()Lorg/keplerproject/luajava/CPtr;", (void *)Java_org_keplerproject_luajava_LuaState__1open},
{"_close", "(Lorg/keplerproject/luajava/CPtr;)V", (void *)Java_org_keplerproject_luajava_LuaState__1close},
{"_newthread", "(Lorg/keplerproject/luajava/CPtr;)Lorg/keplerproject/luajava/CPtr;", (void *)Java_org_keplerproject_luajava_LuaState__1newthread},
{"_getTop","(Lorg/keplerproject/luajava/CPtr;)I",(void*)Java_org_keplerproject_luajava_LuaState__1getTop},
{"_setTop","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1setTop},
{"_pushValue","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1pushValue},
{"_remove","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1remove},
{"_insert","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1insert},
{"_replace","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1replace},
{"_checkStack","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1checkStack},
{"_xmove","(Lorg/keplerproject/luajava/CPtr;Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1xmove},
{"_isNumber","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isNumber},
{"_isString","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isString},
{"_isCFunction","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isCFunction},
{"_isUserdata","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isUserdata},
{"_type","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1type},
{"_typeName","(Lorg/keplerproject/luajava/CPtr;I)Ljava/lang/String;",(void*)Java_org_keplerproject_luajava_LuaState__1typeName},
{"_equal","(Lorg/keplerproject/luajava/CPtr;II)I",(void*)Java_org_keplerproject_luajava_LuaState__1equal},
{"_rawequal","(Lorg/keplerproject/luajava/CPtr;II)I",(void*)Java_org_keplerproject_luajava_LuaState__1rawequal},
{"_lessthan","(Lorg/keplerproject/luajava/CPtr;II)I",(void*)Java_org_keplerproject_luajava_LuaState__1lessthan},
{"_toNumber","(Lorg/keplerproject/luajava/CPtr;I)D",(void*)Java_org_keplerproject_luajava_LuaState__1toNumber},
{"_toInteger","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1toInteger},
{"_toBoolean","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1toBoolean},
{"_toString","(Lorg/keplerproject/luajava/CPtr;I)Ljava/lang/String;",(void*)Java_org_keplerproject_luajava_LuaState__1toString},
{"_objlen","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1objlen},
{"_toThread","(Lorg/keplerproject/luajava/CPtr;I)Lorg/keplerproject/luajava/CPtr;",(void*)Java_org_keplerproject_luajava_LuaState__1toThread},
{"_pushNil","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1pushNil},
{"_pushNumber","(Lorg/keplerproject/luajava/CPtr;D)V",(void*)Java_org_keplerproject_luajava_LuaState__1pushNumber},
// {"_pushInteger","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1pushInteger},
{"_pushString","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/String;)V",(void*)Java_org_keplerproject_luajava_LuaState__1pushString__Lorg_keplerproject_luajava_CPtr_2Ljava_lang_String_2},
{"_pushString","(Lorg/keplerproject/luajava/CPtr;[BI)V",(void*)Java_org_keplerproject_luajava_LuaState__1pushString__Lorg_keplerproject_luajava_CPtr_2_3BI},
{"_pushBoolean","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1pushBoolean},
{"_getTable","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1getTable},
{"_getField","(Lorg/keplerproject/luajava/CPtr;ILjava/lang/String;)V",(void*)Java_org_keplerproject_luajava_LuaState__1getField},
{"_rawGet","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1rawGet},
{"_rawGetI","(Lorg/keplerproject/luajava/CPtr;II)V",(void*)Java_org_keplerproject_luajava_LuaState__1rawGetI},
{"_createTable","(Lorg/keplerproject/luajava/CPtr;II)V",(void*)Java_org_keplerproject_luajava_LuaState__1createTable},
{"_getMetaTable","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1getMetaTable},
{"_getFEnv","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1getFEnv},
{"_setTable","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1setTable},
{"_setField","(Lorg/keplerproject/luajava/CPtr;ILjava/lang/String;)V",(void*)Java_org_keplerproject_luajava_LuaState__1setField},
{"_rawSet","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1rawSet},
{"_rawSetI","(Lorg/keplerproject/luajava/CPtr;II)V",(void*)Java_org_keplerproject_luajava_LuaState__1rawSetI},
{"_setMetaTable","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1setMetaTable},
{"_setFEnv","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1setFEnv},
{"_call","(Lorg/keplerproject/luajava/CPtr;II)V",(void*)Java_org_keplerproject_luajava_LuaState__1call},
{"_pcall","(Lorg/keplerproject/luajava/CPtr;III)I",(void*)Java_org_keplerproject_luajava_LuaState__1pcall},
{"_yield","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1yield},
{"_resume","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1resume},
{"_status","(Lorg/keplerproject/luajava/CPtr;)I",(void*)Java_org_keplerproject_luajava_LuaState__1status},
{"_gc","(Lorg/keplerproject/luajava/CPtr;II)I",(void*)Java_org_keplerproject_luajava_LuaState__1gc},
{"_error","(Lorg/keplerproject/luajava/CPtr;)I",(void*)Java_org_keplerproject_luajava_LuaState__1error},
{"_next","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1next},
{"_concat","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1concat},
{"_pop","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1pop},
{"_newTable","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1newTable},
{"_strlen","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1strlen},
{"_isFunction","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isFunction},
{"_isTable","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isTable},
{"_isNil","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isNil},
{"_isBoolean","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isBoolean},
// {"_isThread","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isThread},
{"_isNone","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isNone},
{"_isNoneOrNil","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1isNoneOrNil},
{"_setGlobal","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/String;)V",(void*)Java_org_keplerproject_luajava_LuaState__1setGlobal},
{"_getGlobal","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/String;)V",(void*)Java_org_keplerproject_luajava_LuaState__1getGlobal},
{"_getGcCount","(Lorg/keplerproject/luajava/CPtr;)I",(void*)Java_org_keplerproject_luajava_LuaState__1getGcCount},
{"_LdoFile","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/String;)I",(void*)Java_org_keplerproject_luajava_LuaState__1LdoFile},
{"_LdoString","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/String;)I",(void*)Java_org_keplerproject_luajava_LuaState__1LdoString},
{"_LgetMetaField","(Lorg/keplerproject/luajava/CPtr;ILjava/lang/String;)I",(void*)Java_org_keplerproject_luajava_LuaState__1LgetMetaField},
{"_LcallMeta","(Lorg/keplerproject/luajava/CPtr;ILjava/lang/String;)I",(void*)Java_org_keplerproject_luajava_LuaState__1LcallMeta},
{"_Ltyperror","(Lorg/keplerproject/luajava/CPtr;ILjava/lang/String;)I",(void*)Java_org_keplerproject_luajava_LuaState__1Ltyperror},
{"_LargError","(Lorg/keplerproject/luajava/CPtr;ILjava/lang/String;)I",(void*)Java_org_keplerproject_luajava_LuaState__1LargError},
{"_LcheckString","(Lorg/keplerproject/luajava/CPtr;I)Ljava/lang/String;",(void*)Java_org_keplerproject_luajava_LuaState__1LcheckString},
{"_LoptString","(Lorg/keplerproject/luajava/CPtr;ILjava/lang/String;)Ljava/lang/String;",(void*)Java_org_keplerproject_luajava_LuaState__1LoptString},
{"_LcheckNumber","(Lorg/keplerproject/luajava/CPtr;I)D",(void*)Java_org_keplerproject_luajava_LuaState__1LcheckNumber},
{"_LoptNumber","(Lorg/keplerproject/luajava/CPtr;ID)D",(void*)Java_org_keplerproject_luajava_LuaState__1LoptNumber},
{"_LcheckInteger","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1LcheckInteger},
{"_LoptInteger","(Lorg/keplerproject/luajava/CPtr;II)I",(void*)Java_org_keplerproject_luajava_LuaState__1LoptInteger},
{"_LcheckStack","(Lorg/keplerproject/luajava/CPtr;ILjava/lang/String;)V",(void*)Java_org_keplerproject_luajava_LuaState__1LcheckStack},
{"_LcheckType","(Lorg/keplerproject/luajava/CPtr;II)V",(void*)Java_org_keplerproject_luajava_LuaState__1LcheckType},
{"_LcheckAny","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1LcheckAny},
{"_LnewMetatable","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/String;)I",(void*)Java_org_keplerproject_luajava_LuaState__1LnewMetatable},
{"_LgetMetatable","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/String;)V",(void*)Java_org_keplerproject_luajava_LuaState__1LgetMetatable},
{"_Lwhere","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState__1Lwhere},
{"_Lref","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1Lref},
{"_LunRef","(Lorg/keplerproject/luajava/CPtr;II)V",(void*)Java_org_keplerproject_luajava_LuaState__1LunRef},
{"_LgetN","(Lorg/keplerproject/luajava/CPtr;I)I",(void*)Java_org_keplerproject_luajava_LuaState__1LgetN},
{"_LsetN","(Lorg/keplerproject/luajava/CPtr;II)V",(void*)Java_org_keplerproject_luajava_LuaState__1LsetN},
{"_LloadFile","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/String;)I",(void*)Java_org_keplerproject_luajava_LuaState__1LloadFile},
{"_LloadBuffer","(Lorg/keplerproject/luajava/CPtr;[BJLjava/lang/String;)I",(void*)Java_org_keplerproject_luajava_LuaState__1LloadBuffer},
{"_LloadString","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/String;)I",(void*)Java_org_keplerproject_luajava_LuaState__1LloadString},
{"_Lgsub","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;",(void*)Java_org_keplerproject_luajava_LuaState__1Lgsub},
{"_LfindTable","(Lorg/keplerproject/luajava/CPtr;ILjava/lang/String;I)Ljava/lang/String;",(void*)Java_org_keplerproject_luajava_LuaState__1LfindTable},
{"_openBase","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1openBase},
{"_openTable","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1openTable},
{"_openIo","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1openIo},
{"_openOs","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1openOs},
{"_openString","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1openString},
{"_openMath","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1openMath},
{"_openDebug","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1openDebug},
{"_openPackage","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1openPackage},
{"_openLibs","(Lorg/keplerproject/luajava/CPtr;)V",(void*)Java_org_keplerproject_luajava_LuaState__1openLibs},
{"luajava_open","(Lorg/keplerproject/luajava/CPtr;I)V",(void*)Java_org_keplerproject_luajava_LuaState_luajava_1open},
{"_getObjectFromUserdata","(Lorg/keplerproject/luajava/CPtr;I)Ljava/lang/Object;",(void*)Java_org_keplerproject_luajava_LuaState__1getObjectFromUserdata},
{"_isObject","(Lorg/keplerproject/luajava/CPtr;I)Z",(void*)Java_org_keplerproject_luajava_LuaState__1isObject},
{"_pushJavaObject","(Lorg/keplerproject/luajava/CPtr;Ljava/lang/Object;)V",(void*)Java_org_keplerproject_luajava_LuaState__1pushJavaObject},
{"_pushJavaFunction","(Lorg/keplerproject/luajava/CPtr;Lorg/keplerproject/luajava/JavaFunction;)V",(void*)Java_org_keplerproject_luajava_LuaState__1pushJavaFunction},
{"_isJavaFunction","(Lorg/keplerproject/luajava/CPtr;I)Z",(void*)Java_org_keplerproject_luajava_LuaState__1isJavaFunction}
};
OK!最后将org.keplerproject.luajava包名和类名也一同改改(当然如果 改 了也要注意修改so中的函数签名)，再给so取个其他的什么名字^_^。希望本文对您有所帮助。