如何解决在退出Activity后GLTextureView无法自动回收

Question

如何解决在退出Activity后GLTextureView无法自动回收

icebuf opened this issue 6 years ago · comments

Ice_Tang commented 6 years ago

使用您的Demo，和AS自带的分析器观察：在退出应用后，系统自动gc了两次，但是还是有很大一部分内存未被回收，dump后发现未被回收的主要是TextureView里mCanvas的Bitmap对象，求教如何解决这个问题。

ChillingVan commented 6 years ago

那就好

ChillingVan · Answer 1 · Mon Nov 12 2018 22:32:28 GMT+0800 (China Standard Time)

请问你看的是哪个界面？除了OffScreenActivity忘了onResume onPause外，其它基本上都能看到内存已经回收了。 GLCanvas里用的是WeakHashMap来管理bitmap的

Ice_Tang · Answer 2 · Tue Nov 13 2018 08:34:46 GMT+0800 (China Standard Time)

DrawText那个页面，我这边用模拟器和真机测试都无法完全回收，也看了你那个回收时调用final()方法，尽管那个方法有时候确实被调用了但是还是无法回收，我这边机型是华为荣耀9，还有一个问题等下我再开一页说明。

Ice_Tang · Answer 3 · Tue Nov 13 2018 09:52:53 GMT+0800 (China Standard Time)

我在Github上已经提交详细问题，关于图片绘制不完整请参考视频： https://bflyff.oss-cn-beijing.aliyuncs.com/video/SVID_20181113_084807.mp4?Expires=1542137974&OSSAccessKeyId=TMP.AQHmEmFHdXW9HFzKNcLR5R6hO83pNo6JzZ0oUjgaM77F0WHDc8wYnvKpCElHADAtAhQdV1jYWcEOOQbe2TZ2AHo9IZ7xdAIVAK9EtXq_RLtL4glER1Kao9SogbQh&Signature=OPcXwrwZsAE1YjADcf%2FcpK%2FBMRE%3D<https://bflyff.cn/video/test.mp4?Expires=1542136622&OSSAccessKeyId=TMP.AQHmEmFHdXW9HFzKNcLR5R6hO83pNo6JzZ0oUjgaM77F0WHDc8wYnvKpCElHADAtAhQdV1jYWcEOOQbe2TZ2AHo9IZ7xdAIVAK9EtXq_RLtL4glER1Kao9SogbQh&Signature=E9SlsHGguY4Yu9u8a7J%2BP19wAbA%3D> 您看到的可以拖动的其实是一个View，表示的是图片当前大小和位置，便于操作。点击空白处后面的GLTextureView开始绘制等大的图片。视频有效时间18个小时，请勿转发。

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________________________________ 发件人: ChillingVan <notifications@github.com> 发送时间: 2018年11月12日 14:32 收件人: ChillingVan/android-openGL-canvas 抄送: bflyff; Author 主题: Re: [ChillingVan/android-openGL-canvas] 如何解决在退出Activity后GLTextureView无法自动回收 (#52) 请问你看的是哪个界面？除了OffScreenActivity忘了onResume onPause外，其它基本上都能看到内存已经回收了。 GLCanvas里用的是WeakHashMap来管理bitmap的 ― You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#52 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/Ae4KFbq8RBlrKXGlo56lsT4SZPLuIC6wks5uuYZ_gaJpZM4YZViE>.

ChillingVan · Answer 4 · Tue Nov 13 2018 12:09:10 GMT+0800 (China Standard Time)

视频打不开呀..

<Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message><RequestId>5BEA4E2920FB5E8025044EEE</RequestId><HostId>bflyff.oss-cn-beijing.aliyuncs.com</HostId><OSSAccessKeyId>TMP.AQHmEmFHdXW9HFzKNcLR5R6hO83pNo6JzZ0oUjgaM77F0WHDc8wYnvKpCElHADAtAhQdV1jYWcEOOQbe2TZ2AHo9IZ7xdAIVAK9EtXq_RLtL4glER1Kao9SogbQh</OSSAccessKeyId><SignatureProvided>OPcXwrwZsAE1YjADcf/cpK/BMRE=<https://bflyff.cn/video/test.mp4?Expires=1542136622</SignatureProvided><StringToSign>GET


1542137974
/bflyff/video/SVID_20181113_084807.mp4</StringToSign><StringToSignBytes>47 45 54 0A 0A 0A 31 35 34 32 31 33 37 39 37 34 0A 2F 62 66 6C 79 66 66 2F 76 69 64 65 6F 2F 53 56 49 44 5F 32 30 31 38 31 31 31 33 5F 30 38 34 38 30 37 2E 6D 70 34 </StringToSignBytes></Error>

Ice_Tang · Answer 5 · Tue Nov 13 2018 13:03:51 GMT+0800 (China Standard Time)

https://bflyff.oss-cn-beijing.aliyuncs.com/video/SVID_20181113_084807.mp4 试试这个，我把密钥验证忘了去掉了

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________________________________ 发件人: ChillingVan <notifications@github.com> 发送时间: 2018年11月13日 4:09 收件人: ChillingVan/android-openGL-canvas 抄送: bflyff; Author 主题: Re: [ChillingVan/android-openGL-canvas] 如何解决在退出Activity后GLTextureView无法自动回收 (#52) 视频打不开呀.. <Error><Code>SignatureDoesNotMatch</Code><Message>The request signature we calculated does not match the signature you provided. Check your key and signing method.</Message><RequestId>5BEA4E2920FB5E8025044EEE</RequestId><HostId>bflyff.oss-cn-beijing.aliyuncs.com</HostId><OSSAccessKeyId>TMP.AQHmEmFHdXW9HFzKNcLR5R6hO83pNo6JzZ0oUjgaM77F0WHDc8wYnvKpCElHADAtAhQdV1jYWcEOOQbe2TZ2AHo9IZ7xdAIVAK9EtXq_RLtL4glER1Kao9SogbQh</OSSAccessKeyId><SignatureProvided>OPcXwrwZsAE1YjADcf/cpK/BMRE=<https://bflyff.cn/video/test.mp4?Expires=1542136622</SignatureProvided><StringToSign>GET 1542137974 /bflyff/video/SVID_20181113_084807.mp4</StringToSign><StringToSignBytes>47 45 54 0A 0A 0A 31 35 34 32 31 33 37 39 37 34 0A 2F 62 66 6C 79 66 66 2F 76 69 64 65 6F 2F 53 56 49 44 5F 32 30 31 38 31 31 31 33 5F 30 38 34 38 30 37 2E 6D 70 34 </StringToSignBytes></Error> ― You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#52 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/Ae4KFeVtfSI5Pw5u8vGJ7j9nC5-wlfMwks5uukXngaJpZM4YZViE>.

ChillingVan · Answer 6 · Tue Nov 13 2018 21:30:34 GMT+0800 (China Standard Time)

我的结果还是好的：

这一张图是打开DrawTextActivity后录的内存，可以看到有DrawTextActivity

然后是关闭这个Acitivty几十秒后的，没点force gc，可以看到还在

然后狂点了好几次gc，可以看到没有了。CanvasGL对象也没有了。但还能看到有剩余2张Bitmap,原本有10张Bitmap。

ChillingVan · Answer 7 · Thu Nov 15 2018 21:46:20 GMT+0800 (China Standard Time)

这个还有问题吗？

Ice_Tang · Answer 8 · Thu Nov 15 2018 21:50:17 GMT+0800 (China Standard Time)

这个问题我现在使用的是用System.exit(0)强制退出的，因为等gc的话要好久，这期间如果连续不断关闭开启应用还是会产生OOM Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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________________________________ From: ChillingVan <notifications@github.com> Sent: Thursday, November 15, 2018 9:46:21 PM To: ChillingVan/android-openGL-canvas Cc: bflyff; Author Subject: Re: [ChillingVan/android-openGL-canvas] 如何解决在退出Activity后GLTextureView无法自动回收 (#52) 这个还有问题吗？ ― You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#52 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/Ae4KFX1f25oTt_Rjh6sG4yMs0_-jpF9kks5uvXAtgaJpZM4YZViE>.

ChillingVan · Answer 9 · Thu Nov 15 2018 21:53:02 GMT+0800 (China Standard Time)

嗯嗯，那可能 private Map<Bitmap, BasicTexture> bitmapTextureMap = new WeakHashMap<>();这Map限制一下数量，或加一下有效时间好一点

Ice_Tang · Answer 10 · Thu Nov 15 2018 21:54:57 GMT+0800 (China Standard Time)

行那我有空按你说的试一下，这个Map存在时间可以调节的话那基本没什么大问题了 Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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________________________________ From: ChillingVan <notifications@github.com> Sent: Thursday, November 15, 2018 9:53:03 PM To: ChillingVan/android-openGL-canvas Cc: bflyff; Author Subject: Re: [ChillingVan/android-openGL-canvas] 如何解决在退出Activity后GLTextureView无法自动回收 (#52) 嗯嗯，那可能 private Map<Bitmap, BasicTexture> bitmapTextureMap = new WeakHashMap<>();这Map限制一下数量，或加一下有效时间好一点 ― You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#52 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/Ae4KFVnwlsNJN5dsuGXwF63n3z2MTZYbks5uvXG_gaJpZM4YZViE>.

ChillingVan · Answer 11 · Tue Nov 20 2018 22:11:18 GMT+0800 (China Standard Time)

我重现不了你说的不断开启关闭会OOM。因为WeakHashMap的内容在内存不足时肯定会被回收的。我在AnimActivity里解码数十张图片绘制，内存占到100多M了，只要退出，内存就会立刻降，反复打开关闭10多次都不会出现OOM。
是不是还需要什么触发条件？

Ice_Tang · Answer 12 · Tue Nov 20 2018 23:38:26 GMT+0800 (China Standard Time)

可能是我的华为手机系统有毛病吧，两个真机每次dump出来一堆bitmap没被回收，而且每次重启应用都在增加，我换别的模拟器到没这样的情况，第二次启动时之前的bitmap基本就回收了，关于这个内存回收暂时没啥问题了，我还是希望您去修复下那个缩放的问题，比起这点内存，体验的问题应该比较重要。 Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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________________________________ From: ChillingVan <notifications@github.com> Sent: Tuesday, November 20, 2018 10:11:20 PM To: ChillingVan/android-openGL-canvas Cc: bflyff; Author Subject: Re: [ChillingVan/android-openGL-canvas] 如何解决在退出Activity后GLTextureView无法自动回收 (#52) 我重现不了你说的不断开启关闭会OOM。因为WeakHashMap的内容在内存不足时肯定会被回收的。我在AnimActivity里解码数十张图片绘制，内存占到100多M了，只要退出，内存就会立刻降，反复打开关闭10多次都不会出现OOM。是不是还需要什么触发条件？ ― You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#52 (comment)>, or mute the thread<https://github.com/notifications/unsubscribe-auth/Ae4KFdDLx4B3_2x-WaY_4kFat64lx7cQks5uxA2IgaJpZM4YZViE>.