Client/GameClient/Assets/Game/Launcher/StreamingAssetsHelper/StreamingAssetsHelper2.cs

//-------------------------------------
// 作者：Stark
//-------------------------------------
using System.Collections.Generic;
using UnityEngine;
using YooAsset;

/*
/// <summary>
/// 资源文件查询服务类
/// </summary>
public class GameQueryServices2 : IQueryServices
{
	public DeliveryFileInfo GetDeliveryFileInfo(string packageName, string fileName)
	{
		throw new System.NotImplementedException();
	}

	public bool QueryDeliveryFiles(string packageName, string fileName)
	{
		return false;
	}

	public bool QueryStreamingAssets(string packageName, string fileName)
	{
		return StreamingAssetsHelper2.FileExists($"{StreamingAssetsDefine.RootFolderName}/{packageName}/{fileName}");
	}
}

/// <summary>
/// StreamingAssets目录下资源查询帮助类
/// </summary>
public sealed class StreamingAssetsHelper2
{
	private static readonly Dictionary<string, bool> _cacheData = new Dictionary<string, bool>(1000);

#if UNITY_ANDROID && !UNITY_EDITOR
	private static AndroidJavaClass _unityPlayerClass;
	public static AndroidJavaClass UnityPlayerClass
	{
		get
		{
			if (_unityPlayerClass == null)
				_unityPlayerClass = new UnityEngine.AndroidJavaClass("com.unity3d.player.UnityPlayer");
			return _unityPlayerClass;
		}
	}

	private static AndroidJavaObject _currentActivity;
	public static AndroidJavaObject CurrentActivity
	{
		get
		{
			if (_currentActivity == null)
				_currentActivity = UnityPlayerClass.GetStatic<AndroidJavaObject>("currentActivity");
			return _currentActivity;
		}
	}

	/// <summary>
	/// 利用安卓原生接口查询内置文件是否存在
	/// </summary>
	public static bool FileExists(string filePath)
	{
		if (_cacheData.TryGetValue(filePath, out bool result) == false)
		{
			result = CurrentActivity.Call<bool>("CheckAssetExist", filePath);
			_cacheData.Add(filePath, result);
		}
		return result;
	}
#else
	public static bool FileExists(string filePath)
	{
		if (_cacheData.TryGetValue(filePath, out bool result) == false)
		{
			result = System.IO.File.Exists(System.IO.Path.Combine(Application.streamingAssetsPath, filePath));
			_cacheData.Add(filePath, result);
		}
		return result;
	}
#endif
}


#if UNITY_ANDROID && UNITY_EDITOR
/// <summary>
/// 为Github对开发者的友好，采用自动补充UnityPlayerActivity.java文件的通用姿势满足各个开发者
/// </summary>
internal class AndroidPost : UnityEditor.Android.IPostGenerateGradleAndroidProject
{
	public int callbackOrder => 99;
	public void OnPostGenerateGradleAndroidProject(string path)
	{
		path = path.Replace("\\", "/");
		string untityActivityFilePath = $"{path}/src/main/java/com/unity3d/player/UnityPlayerActivity.java";
		var readContent = System.IO.File.ReadAllLines(untityActivityFilePath);
		string postContent =
			"    //auto-gen-function \n" +
			"    public boolean CheckAssetExist(String filePath) \n" +
			"    { \n" +
			"        android.content.res.AssetManager assetManager = getAssets(); \n" +
			"        try \n" +
			"        { \n" +
			"            java.io.InputStream inputStream = assetManager.open(filePath); \n" +
			"            if (null != inputStream) \n" +
			"            { \n" +
			"                 inputStream.close(); \n" +
			"                 return true; \n" +
			"            } \n" +
			"        } \n" +
			"        catch(java.io.IOException e) \n" +
			"        { \n" +
			"        } \n" +
			"        return false; \n" +
			"    } \n" +
			"}";

		if (CheckFunctionExist(readContent) == false)
			readContent[readContent.Length - 1] = postContent;
		System.IO.File.WriteAllLines(untityActivityFilePath, readContent);
	}
	private bool CheckFunctionExist(string[] contents)
	{
		for (int i = 0; i < contents.Length; i++)
		{
			if (contents[i].Contains("CheckAssetExist"))
			{
				return true;
			}
		}
		return false;
	}
}
#endif
*/



/*
// 以下代码为安卓原生代码，不需要解除注释
//auto-gen-function
public boolean CheckAssetExist(String filePath)
{
	android.content.res.AssetManager assetManager = getAssets();
	try
	{
		java.io.InputStream inputStream = assetManager.open(filePath);
		if(null != inputStream)
		{
			inputStream.close();
			return true;
		}
	}
	catch(java.io.IOException e)
	{
		//e.printStackTrace();
	}
	return false;
}
*/