Glide 是不是对每个图像请求进行排队？滚动时Recyclerview加载非常慢

Posted 2023-04-19

【中文标题】Glide 是不是对每个图像请求进行排队？滚动时Recyclerview加载非常慢

【英文标题】：Does Glide queue up every image request? Recyclerview loads are very slow when scrollingGlide 是否对每个图像请求进行排队？滚动时Recyclerview加载非常慢

【发布时间】：2015-08-11 06:37:27

【问题描述】：

我发现我们的应用程序中使用 Glide 3.6 + 使用 GridLayoutManager 的 RecyclerView 加载图像的时间很长。图像都在 20kb-40kb 左右。似乎 glide 将所有请求排队，一旦您开始向下滚动列表，就会导致图像需要很长时间才能加载。我已经附加了 GenericRequest 类的日志。

V/GenericRequest﹕ finished setup for calling load in 0.170291 this: 249721749
V/GenericRequest﹕ finished onSizeReady in 0.36724999999999997 this: 249721749
V/GenericRequest﹕ finished run method in 0.763083 this: 249721749
V/GenericRequest﹕ Got onSizeReady in 0.041249999999999995 this: 991315424
V/GenericRequest﹕ finished setup for calling load in 0.15479199999999999 this: 991315424
V/GenericRequest﹕ finished onSizeReady in 0.30008399999999996 this: 991315424
V/GenericRequest﹕ finished run method in 0.499959 this: 991315424
V/GenericRequest﹕ Got onSizeReady in 0.060584 this: 1029510845
V/GenericRequest﹕ finished setup for calling load in 0.200625 this: 1029510845
V/GenericRequest﹕ finished onSizeReady in 0.39233399999999996 this: 1029510845
V/GenericRequest﹕ finished run method in 0.670084 this: 1029510845
V/GenericRequest﹕ Got onSizeReady in 0.048374999999999994 this: 516458536
V/GenericRequest﹕ finished setup for calling load in 0.188666 this: 516458536
V/GenericRequest﹕ finished onSizeReady in 0.379916 this: 516458536
V/GenericRequest﹕ finished run method in 0.654083 this: 516458536
V/GenericRequest﹕ Resource ready in 1012.49325 size: 2.18359375 fromCache: false this: 671303046
V/GenericRequest﹕ Got onSizeReady in 0.073833 this: 356666200
V/GenericRequest﹕ finished setup for calling load in 0.240667 this: 356666200
V/GenericRequest﹕ finished onSizeReady in 0.460792 this: 356666200
V/GenericRequest﹕ finished run method in 0.780708 this: 356666200
V/GenericRequest﹕ Got onSizeReady in 0.064583 this: 347417463
V/GenericRequest﹕ finished setup for calling load in 0.242583 this: 347417463
V/GenericRequest﹕ finished onSizeReady in 0.45758299999999996 this: 347417463
V/GenericRequest﹕ finished run method in 0.7521249999999999 this: 347417463
V/GenericRequest﹕ Got onSizeReady in 0.142833 this: 671303046
V/GenericRequest﹕ finished setup for calling load in 0.38966599999999996 this: 671303046
V/GenericRequest﹕ finished onSizeReady in 0.703708 this: 671303046
V/GenericRequest﹕ finished run method in 1.851125 this: 671303046
V/GenericRequest﹕ Got onSizeReady in 0.056957999999999995 this: 634418527
V/GenericRequest﹕ finished setup for calling load in 0.21787499999999999 this: 634418527
V/GenericRequest﹕ finished onSizeReady in 0.443083 this: 634418527
V/GenericRequest﹕ finished run method in 0.7567499999999999 this: 634418527
V/GenericRequest﹕ Resource ready in 3443.041335 size: 2.18359375 fromCache: false this: 249721749
V/GenericRequest﹕ Resource ready in 4110.604794 size: 3.8623809814453125 fromCache: false this: 1054166306
V/GenericRequest﹕ Resource ready in 3824.033544 size: 3.8623809814453125 fromCache: false this: 991315424
V/GenericRequest﹕ Resource ready in 3773.0562109999996 size: 3.8623809814453125 fromCache: false this: 1029510845
V/GenericRequest﹕ Resource ready in 4542.90796 size: 2.18359375 fromCache: false this: 516458536
V/GenericRequest﹕ Resource ready in 4171.866168 size: 3.8623809814453125 fromCache: false this: 634418527
V/GenericRequest﹕ Resource ready in 4474.170752 size: 3.8623809814453125 fromCache: false this: 356666200
V/GenericRequest﹕ Resource ready in 4496.104085 size: 2.18359375 fromCache: false this: 671303046
V/GenericRequest﹕ Resource ready in 4814.625126999999 size: 2.18359375 fromCache: false this: 347417463

想知道是否有人可以提供一些关于问题可能是什么的见解。也许是调整视图大小所需的时间？我使用match_parent 作为视图的宽度和大约200dp 的固定高度。

图片加载使用

Glide.with(fragmentContext)
          .load(imageUrl)
          .centerCrop()
          .placeholder(R.drawable.placeholder)
          .into(viewHolder.productImage);

XML

<ImageView
      android:id="@+id/product_image"
      android:layout_
      android:layout_ (208dp)
      android:layout_gravity="top"
      android:background="@color/placeholder_bg"
      />

编辑：根据@VladimirMironov 的评论。我已经更新了增加的池并在回收视图时清除了挂起的负载。这似乎在快速滚动时有所帮助。在进行视图测量时，为视图提供覆盖或不使用“match_parent”是否会带来任何好处？仍然存在视图不会显示近 5 秒的情况。

【问题讨论】：

您可以尝试两件事来提高性能：1. 取消RecyclerView.Adapter.onViewRecycled 中的下载请求（通过Glide.clear 调用） 2. 通过recycler.getRecycledViewPool().setMaxRecycledViews(0, 2 * numColumns) 增加ViewHolders 池大小

@VladimirMironov 很有趣，不知道这些我会试一试

@VladimirMironov 我用一些额外的信息编辑了我的帖子

【参考方案1】：

添加以下行，您将看到改进

recyclerView.setHasFixedSize(true);
yourAdapter.setHasStableIds(true);//recycler adapter

覆盖 onViewRecycled() 并清除之前的 Glide 请求

Glide.with(imageHolder.preview.getContext()).clear(imageHolder.preview);