native层如何访问rawfile的二进制文件？

Question

native层如何访问rawfile的二进制文件

Answer 1

1. ts层通过napi接口传入resourceManager，示例代码：

   let resourceManager = getContext(this).resourceManagerawait;   
   napiTest.openRawfile(resourceManager);
   

2. napi获取ts层resourceManager创建NativeResourceManager并读取resource/rawfile二进制文件，参考代码如下：

   static napi_value OpenRawFile(napi_env env, napi_callback_info info) {   
    size_t argc = 1;   
    napi_value args[1] = {nullptr};   
    napi_get_cb_info(env, info, \&argc, args, nullptr, nullptr);   
    
    NativeResourceManager \*nativeRm = OH_ResourceManager_InitNativeResourceManager(env, args[0]);   
    RawFile \*rawFile = OH_ResourceManager_OpenRawFile(nativeRm, "your rawfile name");   
    RawFileDescriptor descriptor;   
    bool b = OH_ResourceManager_GetRawFileDescriptor(rawFile, descriptor);   
    
    napi_value napi_value_size;   
    napi_create_int32(env, descriptor.length, \&napi_value_size);   
    
    return napi_value_size;   
   }