为cocos2d-x实现安卓输入框。非全屏，无dialog，绑定到lua

cocos2d-x官方自带的输入框，简直惨不忍睹，在ios还好，在安卓简直了。。用过的都知道。。。

所以为了用户体验，我们自己搞一个吧。输入框这种东西比较特殊，不像按钮、列表框之类的很容易实现，因为涉及到复制粘贴、操作虚拟键盘等，所以当然是用安卓原生的输入框最好了。

非常感谢我们的主程陈剑大哥，思路是陈剑大哥想的，我只负责记录一下。

本来代码50天前就写好了，但是绑定到js一直失败，恶心了好几天放弃了。前几天在用lua写点东西，把之前的代码拷过来试着绑定到lua，结果一次就成功了，完全没有踩坑，不知道说什么好了。。而且前几天官方发布了cocos2d-x 3.8版本，已经自带了，所以现在再发出来感觉毫无竞争力了呢。。。

使用原生控件的优点不用多说了，缺点当然也是有的。例如排版、布局、屏幕适配等，都要适应cocos2d的规则，而且由于是系统控件，渲染层级不受cocos2d的zorder的影响。当然这些努力一下也是可以解决的。

要注意的有：

1、c++通过jni控制java创建安卓控件。

2、c++持有java对象的引用，防止垃圾回收。

3、java回调c语言，c语言调用c++，所以需要处理好java对象与c++对象的对应关系。

我的做法是：

1、创建一个输入框工厂类，负责根据不同平台生成输入框，当然我只会安卓的。

2、工厂类维护一个map，保存c++对象和java对象的对应关系。

3、根据cocos2d的世界坐标系，更新安卓原生控件。

防止恶意转载还改名的恶心行为。本博客地址：http://www.cnblogs.com/wolfred7464/

上代码吧：

#include "lua_RedBindings_auto.hpp"
#if CC_TARGET_PLATFORM == CC_PLATFORM_ANDROID || CC_TARGET_PLATFORM == CC_PLATFORM_IOS || CC_TARGET_PLATFORM == CC_PLATFORM_MAC || CC_TARGET_PLATFORM == CC_PLATFORM_WIN32
#include "RedBindings.h"
#include "tolua_fix.h"
#include "LuaBasicConversions.h"

int lua_RedBindings_EditText_setString(lua_State* tolua_S)
{
int argc = 0;
EditText* cobj = nullptr;
bool ok  = true;

#if COCOS2D_DEBUG >= 1
tolua_Error tolua_err;
#endif

#if COCOS2D_DEBUG >= 1
if (!tolua_isusertype(tolua_S,1,"EditText",0,&tolua_err)) goto tolua_lerror;
#endif

cobj = (EditText*)tolua_tousertype(tolua_S,1,0);

#if COCOS2D_DEBUG >= 1
if (!cobj)
{
tolua_error(tolua_S,"invalid 'cobj' in function 'lua_RedBindings_EditText_setString'", nullptr);
return 0;
}
#endif

argc = lua_gettop(tolua_S)-1;
if (argc == 1)
{
std::string arg0;

ok &= luaval_to_std_string(tolua_S, 2,&arg0, "EditText:setString");
if(!ok)
{
tolua_error(tolua_S,"invalid arguments in function 'lua_RedBindings_EditText_setString'", nullptr);
return 0;
}
cobj->setString(arg0);
lua_settop(tolua_S, 1);
return 1;
}
luaL_error(tolua_S, "%s has wrong number of arguments: %d, was expecting %d \n", "EditText:setString",argc, 1);
return 0;

#if COCOS2D_DEBUG >= 1
tolua_lerror:
tolua_error(tolua_S,"#ferror in function 'lua_RedBindings_EditText_setString'.",&tolua_err);
#endif

return 0;
}
int lua_RedBindings_EditText_getString(lua_State* tolua_S)
{
int argc = 0;
EditText* cobj = nullptr;
bool ok  = true;

#if COCOS2D_DEBUG >= 1
tolua_Error tolua_err;
#endif

#if COCOS2D_DEBUG >= 1
if (!tolua_isusertype(tolua_S,1,"EditText",0,&tolua_err)) goto tolua_lerror;
#endif

cobj = (EditText*)tolua_tousertype(tolua_S,1,0);

#if COCOS2D_DEBUG >= 1
if (!cobj)
{
tolua_error(tolua_S,"invalid 'cobj' in function 'lua_RedBindings_EditText_getString'", nullptr);
return 0;
}
#endif

argc = lua_gettop(tolua_S)-1;
if (argc == 0)
{
if(!ok)
{
tolua_error(tolua_S,"invalid arguments in function 'lua_RedBindings_EditText_getString'", nullptr);
return 0;
}
std::string ret = cobj->getString();
tolua_pushcppstring(tolua_S,ret);
return 1;
}
luaL_error(tolua_S, "%s has wrong number of arguments: %d, was expecting %d \n", "EditText:getString",argc, 0);
return 0;

#if COCOS2D_DEBUG >= 1
tolua_lerror:
tolua_error(tolua_S,"#ferror in function 'lua_RedBindings_EditText_getString'.",&tolua_err);
#endif

return 0;
}
static int lua_RedBindings_EditText_finalize(lua_State* tolua_S)
{
printf("luabindings: finalizing LUA object (EditText)");
return 0;
}

int lua_register_RedBindings_EditText(lua_State* tolua_S)
{
tolua_usertype(tolua_S,"EditText");
tolua_cclass(tolua_S,"EditText","EditText","cc.Node",nullptr);

tolua_beginmodule(tolua_S,"EditText");
tolua_function(tolua_S,"setString",lua_RedBindings_EditText_setString);
tolua_function(tolua_S,"getString",lua_RedBindings_EditText_getString);
tolua_endmodule(tolua_S);
std::string typeName = typeid(EditText).name();
g_luaType[typeName] = "EditText";
g_typeCast["EditText"] = "EditText";
return 1;
}

int lua_RedBindings_EditTextFactory_getEditTextByJobject(lua_State* tolua_S)
{
int argc = 0;
EditTextFactory* cobj = nullptr;
bool ok  = true;

#if COCOS2D_DEBUG >= 1
tolua_Error tolua_err;
#endif

#if COCOS2D_DEBUG >= 1
if (!tolua_isusertype(tolua_S,1,"EditTextFactory",0,&tolua_err)) goto tolua_lerror;
#endif

cobj = (EditTextFactory*)tolua_tousertype(tolua_S,1,0);

#if COCOS2D_DEBUG >= 1
if (!cobj)
{
tolua_error(tolua_S,"invalid 'cobj' in function 'lua_RedBindings_EditTextFactory_getEditTextByJobject'", nullptr);
return 0;
}
#endif

argc = lua_gettop(tolua_S)-1;
if (argc == 1)
{
_jobject* arg0;

ok &= luaval_to_object<_jobject>(tolua_S, 2, "_jobject",&arg0, "EditTextFactory:getEditTextByJobject");
if(!ok)
{
tolua_error(tolua_S,"invalid arguments in function 'lua_RedBindings_EditTextFactory_getEditTextByJobject'", nullptr);
return 0;
}
EditText* ret = cobj->getEditTextByJobject(arg0);
object_to_luaval<EditText>(tolua_S, "EditText",(EditText*)ret);
return 1;
}
luaL_error(tolua_S, "%s has wrong number of arguments: %d, was expecting %d \n", "EditTextFactory:getEditTextByJobject",argc, 1);
return 0;

#if COCOS2D_DEBUG >= 1
tolua_lerror:
tolua_error(tolua_S,"#ferror in function 'lua_RedBindings_EditTextFactory_getEditTextByJobject'.",&tolua_err);
#endif

return 0;
}
int lua_RedBindings_EditTextFactory_createEditText(lua_State* tolua_S)
{
int argc = 0;
EditTextFactory* cobj = nullptr;
bool ok  = true;

#if COCOS2D_DEBUG >= 1
tolua_Error tolua_err;
#endif

#if COCOS2D_DEBUG >= 1
if (!tolua_isusertype(tolua_S,1,"EditTextFactory",0,&tolua_err)) goto tolua_lerror;
#endif

cobj = (EditTextFactory*)tolua_tousertype(tolua_S,1,0);

#if COCOS2D_DEBUG >= 1
if (!cobj)
{
tolua_error(tolua_S,"invalid 'cobj' in function 'lua_RedBindings_EditTextFactory_createEditText'", nullptr);
return 0;
}
#endif

argc = lua_gettop(tolua_S)-1;
if (argc == 0)
{
if(!ok)
{
tolua_error(tolua_S,"invalid arguments in function 'lua_RedBindings_EditTextFactory_createEditText'", nullptr);
return 0;
}
EditText* ret = cobj->createEditText();
object_to_luaval<EditText>(tolua_S, "EditText",(EditText*)ret);
return 1;
}
luaL_error(tolua_S, "%s has wrong number of arguments: %d, was expecting %d \n", "EditTextFactory:createEditText",argc, 0);
return 0;

#if COCOS2D_DEBUG >= 1
tolua_lerror:
tolua_error(tolua_S,"#ferror in function 'lua_RedBindings_EditTextFactory_createEditText'.",&tolua_err);
#endif

return 0;
}
int lua_RedBindings_EditTextFactory_getInstance(lua_State* tolua_S)
{
int argc = 0;
bool ok  = true;

#if COCOS2D_DEBUG >= 1
tolua_Error tolua_err;
#endif

#if COCOS2D_DEBUG >= 1
if (!tolua_isusertable(tolua_S,1,"EditTextFactory",0,&tolua_err)) goto tolua_lerror;
#endif

argc = lua_gettop(tolua_S) - 1;

if (argc == 0)
{
if(!ok)
{
tolua_error(tolua_S,"invalid arguments in function 'lua_RedBindings_EditTextFactory_getInstance'", nullptr);
return 0;
}
EditTextFactory* ret = EditTextFactory::getInstance();
object_to_luaval<EditTextFactory>(tolua_S, "EditTextFactory",(EditTextFactory*)ret);
return 1;
}
luaL_error(tolua_S, "%s has wrong number of arguments: %d, was expecting %d\n ", "EditTextFactory:getInstance",argc, 0);
return 0;
#if COCOS2D_DEBUG >= 1
tolua_lerror:
tolua_error(tolua_S,"#ferror in function 'lua_RedBindings_EditTextFactory_getInstance'.",&tolua_err);
#endif
return 0;
}
static int lua_RedBindings_EditTextFactory_finalize(lua_State* tolua_S)
{
printf("luabindings: finalizing LUA object (EditTextFactory)");
return 0;
}

int lua_register_RedBindings_EditTextFactory(lua_State* tolua_S)
{
tolua_usertype(tolua_S,"EditTextFactory");
tolua_cclass(tolua_S,"EditTextFactory","EditTextFactory","",nullptr);

tolua_beginmodule(tolua_S,"EditTextFactory");
tolua_function(tolua_S,"getEditTextByJobject",lua_RedBindings_EditTextFactory_getEditTextByJobject);
tolua_function(tolua_S,"createEditText",lua_RedBindings_EditTextFactory_createEditText);
tolua_function(tolua_S,"getInstance", lua_RedBindings_EditTextFactory_getInstance);
tolua_endmodule(tolua_S);
std::string typeName = typeid(EditTextFactory).name();
g_luaType[typeName] = "EditTextFactory";
g_typeCast["EditTextFactory"] = "EditTextFactory";
return 1;
}

static int lua_RedBindings_EditTextAndroid_finalize(lua_State* tolua_S)
{
printf("luabindings: finalizing LUA object (EditTextAndroid)");
return 0;
}

int lua_register_RedBindings_EditTextAndroid(lua_State* tolua_S)
{
tolua_usertype(tolua_S,"EditTextAndroid");
tolua_cclass(tolua_S,"EditTextAndroid","EditTextAndroid","EditText",nullptr);

tolua_beginmodule(tolua_S,"EditTextAndroid");
tolua_endmodule(tolua_S);
std::string typeName = typeid(EditTextAndroid).name();
g_luaType[typeName] = "EditTextAndroid";
g_typeCast["EditTextAndroid"] = "EditTextAndroid";
return 1;
}
TOLUA_API int register_all_RedBindings(lua_State* tolua_S)
{
tolua_open(tolua_S);

tolua_module(tolua_S,"red",0);
tolua_beginmodule(tolua_S,"red");

lua_register_RedBindings_EditText(tolua_S);
lua_register_RedBindings_EditTextFactory(tolua_S);
lua_register_RedBindings_EditTextAndroid(tolua_S);

tolua_endmodule(tolua_S);
return 1;
}

#endif

lua_RedBindings_auto.cpp