Victory Game Center

Chris Babcock wrote: The files are packaged so you cannot use low-level fopen to access them. You need to use the file system.

Chris Babcock wrote: The OBB is embedded in the APK in the assets directory as "main.obb.png".

just use extern FString GExternalFilePath and protect any code using it with #if PLATFORM_ANDROID / #endif.

Something like this should copy all the files in the provided directory (assuming it was in Contents) to GExternalFilePath:

Code: Select all

void CopyAllAssetsToExternal(FString inDirectory)
{
#if PLATFORM_ANDROID
	// only do this on Android
	extern FString GExternalFilePath;
	FString DirectoryPath = FPaths::GameContentDir() / inDirectory;
	IFileManager* FileManager = &IFileManager::Get();

	// iterate over all the files in provided directory
	TArray<FString> directoriesToIgnoreAndNotRecurse;
	FLocalTimestampDirectoryVisitor Visitor(FPlatformFileManager::Get().GetPlatformFile(), directoriesToIgnoreAndNotRecurse, directoriesToIgnoreAndNotRecurse, false);
	FileManager->IterateDirectory(*DirectoryPath, Visitor);

	for (TMap<FString, FDateTime>::TIterator TimestampIt(Visitor.FileTimes); TimestampIt; ++TimestampIt)
	{
		// read the file contents and write it if successful to external path
		TArray<uint8> MemFile;
		const FString SourceFilename = TimestampIt.Key();
		if (FFileHelper::LoadFileToArray(MemFile, *SourceFilename, 0))
		{
			FString DestFilename = GExternalFilePath / FPaths::GetCleanFilename(*SourceFilename);
			FFileHelper::SaveArrayToFile(MemFile, *DestFilename);
		}
	}
#endif
}

Then you can give the filename to your third-party library prefixed with GExternalFilePath.