目录
问题:
尝试
问题得到解决
我的解释
问题:
最近游戏要上线,发现一个现象,部分机型在启动的时候闪退或者黑屏,概率是5%左右,通过Bugly只有个别机型才有这个现象,其实真实情况比这严重的多,bugly有时候并不能捕捉到这种情况,我们各种怀疑和查找,最终发现问题的根源。
问题日志如下:
2-18 15:04:10.924 28696 30223 E Unity : Unable to open archive file for writing: '/storage/emulated/0/Android/data/com.xfp.hnsz.ks.xwdxy.cs/files/UnityCache/Temp/0b2da51ac602117b08efce711b40391f/__data'
12-18 15:04:10.924 28696 30144 E Unity : Error while downloading Asset Bundle: Failed to decompress data for the AssetBundle 'jar:file:///data/app/~~mqBnkrTVeHx0R5PQj6Zlhw==/com.xfp.hnsz.ks.xwdxy.cs-ujHBQxE6h_IEHhAMfYKUNA==/base.apk!/assets/assets-art-atlas-achievement.spriteatlasv2_assets_all_fb282f19f9eb9a06452ff40988043469.bundle'.
12-18 15:04:10.927 28696 30148 E Unity : Unable to move cache file '/storage/emulated/0/Android/data/com.xfp.hnsz.ks.xwdxy.cs/files/UnityCache/Temp/1678b268885c708b6b23968c60116b1a' to '/storage/emulated/0/Android/data/com.xfp.hnsz.ks.xwdxy.cs/files/UnityCache/Shared/c145b22e3c49b6b6064231a90d5e684c/48c0472eecd6b114bfc238bd99e509c4': error code - 1
12-18 15:04:10.927 28696 30148 E Unity : Error while downloading Asset Bundle: Couldn't move cache data '/storage/emulated/0/Android/data/com.xfp.hnsz.ks.xwdxy.cs/files/UnityCache/Temp/1678b268885c708b6b23968c60116b1a' into place '/storage/emulated/0/Android/data/com.xfp.hnsz.ks.xwdxy.cs/files/UnityCache/Shared/c145b22e3c49b6b6064231a90d5e684c/48c0472eecd6b114bfc238bd99e509c4' when caching AssetBundle 'jar:file:///data/app/~~mqBnkrTVeHx0R5PQj6Zlhw==/com.xfp.hnsz.ks.xwdxy.cs-ujHBQxE6h_IEHhAMfYKUNA==/base.apk!/assets/icon_fr_eye.png_48c0472eecd6b114bfc238bd99e509c4.bundle'.
12-18 15:04:10.927 28696 30149 E Unity : Unable to move cache file '/storage/emulated/0/Android/data/com.xfp.hnsz.ks.xwdxy.cs/files/UnityCache/Temp/eda9c7b7cbb31ddf2be58ac700e478d6' to '/storage/emulated/0/Android/data/com.xfp.hnsz.ks.xwdxy.cs/files/UnityCache/Shared/c64d4e8d8e84733e1a9638e93f484830/1627a372980ad47ae64c100b39449f60': error code - 1
12-18 15:04:10.927 28696 30149 E Unity : Error while downloading Asset Bundle: Couldn't move cache data '/storage/emulated/0/Android/data/com.xfp.hnsz.ks.xwdxy.cs/files/UnityCache/Temp/eda9c7b7cbb31ddf2be58ac700e478d6' into place '/storage/emulated/0/Android/data/com.xfp.hnsz.ks.xwdxy.cs/files/UnityCache/Shared/c64d4e8d8e84733e1a9638e93f484830/1627a372980ad47ae64c100b39449f60' when caching AssetBundle 'jar:file:///data/app/~~mqBnkrTVeHx0R5PQj6Zlhw==/com.xfp.hnsz.ks.xwdxy.cs-ujHBQxE6h_IEHhAMfYKUNA==/base.apk!/assets/icon_mca_up.png_1627a372980ad47ae64c100b39449f60.bundle'.
12-18 15:04:11.222 28696 30025 E Unity : UnityWebRequestException: Data Processing Error, see Download Handler error
12-18 15:04:11.222 28696 30025 E Unity : at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x00000] in <00000000000000000000000000000000>:0
12-18 15:04:11.222 28696 30025 E Unity : at Cysharp.Threading.Tasks.UnityAsyncExtensions+UnityWebRequestAsyncOperationConfiguredSource.GetResult (System.Int16 token) [0x00000] in <00000000000000000000000000000000>:0
通过日志我们发现,在unityActivity一启动的时候,我们就启动下载更新文件(也就是在awake函数中调用UnityWebRequest函数将StreamingAssets的初始包的assetbundle拷贝到可写的沙盒目录下),小概率爆出如上问题。
尝试
我们怀疑是unity的storage的存储权限问题,所以我们将安装目录放到 external(SDCard)扩展卡中,默认情况是internal(沙盒目录):
并在导出android工程的清单文件(AndroidManifest.xml)下开扩展卡权限:
READ_EXTERNAL_STORAGE(读取外部存储器 )
WRITE_EXTERNAL_STORAGE(写外部存储器
但是由于发行方说,游戏已启动就申请扩展卡的存储权限,不合规;也不利于用户安装和导量的转化,最终我们将该办法摒弃掉了。
问题得到解决
从头再来,最终我们在官网发现Caching.ready
using System.Collections;
using UnityEngine;
using UnityEngine.Networking;
public class Example : MonoBehaviour
{
IEnumerator IsCachingReadyExample(string uri)
{
//Using this conditional says we want to wait for our Caching system to be ready before trying to download bundles
while (!Caching.ready)
{
yield return null;
}
//Download the bundle
UnityWebRequest request = UnityWebRequest.GetAssetBundle(uri);
yield return request.SendWebRequest();
AssetBundle bundle = DownloadHandlerAssetBundle.GetContent(request);
//Do something with the AssetBundle...
}
}
当我们在UnityWebRequest我们的assetbundle之前加上Caching.ready这句的时候,最终问题得到解决。
其实日志已经告诉我们,在写文件的时候无法将文件写入到缓存中。由于unity对于cache的机制以及什么时候cache.ready准备好了并没有写的很清楚(或许官方写了,我并没有找到出处)
我的解释
对于cache,unity应该unityActivity一启动的时候需要申请cache,但一定是异步或者在awake之后,而我们的下载更新就在awake第一行就启动下载并是异步的操纵,这时cache有一定概率并没有初始化完成。所有造成有一定概率爆出以上错误的原因。文章来源:https://www.toymoban.com/news/detail-798129.html
如果小伙伴找到cache的详细文档以及cache.ready=true的时机,请告知我,不胜感激!!!文章来源地址https://www.toymoban.com/news/detail-798129.html
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