一、创建Native C++ Module

1、右键项目->new->module

如图：

2、修改build-profile.json5配置

"externalNativeOptions": {"path": "./src/main/cpp/CMakeLists.txt","arguments": "-v -DOHOS_STL=c++_shared","abiFilters": [
//        "armeabi-v7a",
//        "x86_64","arm64-v8a"],"cppFlags": ""}

3、CMakeLists.txt 配置如下：

# the minimum version of CMake.
cmake_minimum_required(VERSION 3.4.1)
project(MyApplication43)set(NATIVERENDER_ROOT_PATH ${CMAKE_CURRENT_SOURCE_DIR})include_directories(${NATIVERENDER_ROOT_PATH}${NATIVERENDER_ROOT_PATH}/include)add_library(application SHARED SRRtcVideoEngineNapi.cpp SRRtcRoomCallBackNapi.cpp)
target_link_libraries(application PUBLIC libace_napi.z.so)

二、代码实现

1、主调接口实现

NAPI中缓存回调接口的变量，便于后面回调给TS

napi_value SRRtcVideoEngineNapi::setRRoomCallBack(napi_env env, napi_callback_info info) {LogE("setRRoomCallBack---一个参数:ISRoomCallBack");size_t argc = 1;napi_value args[1] = {nullptr};napi_status status = napi_get_cb_info(env, info, &argc, args, nullptr, nullptr);if (status != napi_ok) {napi_throw_error(env, "", "");return nullptr;}// 缓存回调函数全局变量，回调ets用if (SRGlobalvar::napi_CallbackReference == nullptr) {LogE("setRRoomCallBack===new NapiCallBack()");SRGlobalvar::napi_CallbackReference = new NapiCallBack(); // 创建缓存函数}napi_create_reference(env, args[0], 1, &SRGlobalvar::napi_CallbackReference->roomCallBack_napi);SRGlobalvar::napi_CallbackReference->env = env;// 调用 底层sdk ： RRoomControlMgr.setCallBackRResult rResult = sr_engineSdk->setRRoomCallBackRtcEngine();return SRGlobalvar::returnResult(env, rResult);
}

2、回调接口实现

通过缓存的env，callback对象，调用napi_call_function方法将数据传回给ts

void SRRtcRoomCallBackNapi::onRoomJoinConfirm(RResult rResult, const RRoomInfo &roomInfo) {// 处理 onRoomJoinConfirm 通知LogE("回调消息---SRRtcRoomCallBack:onRoomJoinConfirm ");// 转换N-API对象napi_value roomInfo_napi = SRGlobalvar::convertToSRRoomInfo(SRGlobalvar::napi_CallbackReference->env, roomInfo);napi_value rResult_napi = SRGlobalvar::convertToSRResult(SRGlobalvar::napi_CallbackReference->env, rResult);// 传递给TSnapi_value callback;napi_get_reference_value(SRGlobalvar::napi_CallbackReference->env,SRGlobalvar::napi_CallbackReference->roomCallBack_napi, &callback);napi_value jsMethod;napi_get_named_property(SRGlobalvar::napi_CallbackReference->env, callback, "onRoomJoinConfirm", &jsMethod);napi_value argv[] = {rResult_napi, roomInfo_napi};napi_value callbackResult = nullptr;napi_call_function(SRGlobalvar::napi_CallbackReference->env, nullptr, jsMethod, 2, argv, &callbackResult);
}

三、ets的接收c++传回的数据

1、index.d.ts 代码增加接口

function setRRoomCallBack(sroomCallback: ISRoomCallBack): SRReult

2、回调接口SRoomCallBack.ets

export class SRoomCallBack implements ISRoomCallBack {onRoomJoinConfirm(rResult: SRReult, roomInfo: SRRoomInfo) {SRLog.i(TAG, `onRoomJoinConfirm==回调测试完成=rResult:${JsonUtil.jsonToString(rResult)}\n roomInfo:${JsonUtil.jsonToString(roomInfo)}`)}
}

3、调用

import srrtcNapi from 'librtcvideo.so';setRRoomCallBackRtcEngine(callback: ISRoomCallBack) {let srResult = srrtcNapi.setRRoomCallBack(callback)SRLog.i(TAG, "setRRoomCallBackRtcEngine===srresult:" + JsonUtil.jsonToString(srResult))}