Android picasso在将图像加载到回收器视图时占用内存

Question

我有一个RecyclerView，它有很多项(100+)。每一项都是一个ImageView。在每个ImageView中，我使用Picasso库设置Bitmap，如下所示：

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    String photoUrl = photos.get(position).getPath();
    File photoFile = new File(photoUrl);
    Picasso.with(context).load(photoFile).fit().centerCrop().into(holder.photo);
}

我的问题是我在logcat中捕获了stacktrace：

04-27 14:48:43.613 27706-27740/com.rcd.perfecto E/dalvikvm-heap: Out of memory on a 30720016-byte allocation.
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm: "Picasso-/storage/emulated/0/DCIM/Camera/IMG_20150921_100202_HDR.jpg" prio=5 tid=25 RUNNABLE
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:   | group="main" sCount=0 dsCount=0 obj=0x42badb28 self=0x560cd3c0
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:   | sysTid=27740 nice=10 sched=0/0 cgrp=apps/bg_non_interactive handle=1443672328
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:   | state=R schedstat=( 818421079 614394933 1660 ) utm=75 stm=6 core=0
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at android.graphics.BitmapFactory.decodeStreamInternal(BitmapFactory.java:627)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:603)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at com.squareup.picasso.BitmapHunter.decodeStream(BitmapHunter.java:142)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at com.squareup.picasso.BitmapHunter.hunt(BitmapHunter.java:217)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at com.squareup.picasso.BitmapHunter.run(BitmapHunter.java:159)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:422)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at java.util.concurrent.FutureTask.run(FutureTask.java:237)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1112)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:587)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at java.lang.Thread.run(Thread.java:841)
04-27 14:48:43.613 27706-27740/com.rcd.perfecto I/dalvikvm:     at com.squareup.picasso.Utils$PicassoThread.run(Utils.java:411)

如果我捕捉到了这一点，那么我就会得到OutOfMemoryError，然后应用程序就会崩溃。我能做些什么来防止这种情况发生？

Answer 1

尝试在AndroidManefist.xml的Application标签中添加android:largeHeap="true"

Answer 2

最好使用.fit()或.resize(width, height)。

1) .fit() -这将导致请求的延迟执行，直到ImageView布局完成。注意:仅当您的目标是ImageView时，此方法才有效。

2) .resize(width, height) -这会将图像调整到指定的像素大小。

参考：http://square.github.io/picasso/2.x/picasso/

Answer 3

尝试使用毕加索缓存策略https://futurestud.io/blog/picasso-influencing-image-caching

或者使用UniversalImageLoader而不是毕加索;-)