java.lang.IllegalStateException：已在池中

Question

在回收物品时，我在回收者视图上的产品上遇到这种奇怪的崩溃，而且我也无法重现此崩溃。

  Fatal Exception: java.lang.IllegalStateException: Already in the pool!
   at androidx.core.util.Pools$SimplePool.release(Pools.java:117)
   at androidx.recyclerview.widget.AdapterHelper.recycleUpdateOp(AdapterHelper.java:743)
   at androidx.recyclerview.widget.AdapterHelper.recycleUpdateOpsAndClearList(AdapterHelper.java:750)
   at androidx.recyclerview.widget.AdapterHelper.consumePostponedUpdates(AdapterHelper.java:123)
   at androidx.recyclerview.widget.AdapterHelper.consumeUpdatesInOnePass(AdapterHelper.java:557)
   at androidx.recyclerview.widget.RecyclerView.processAdapterUpdatesAndSetAnimationFlags(RecyclerView.java:3585)
   at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep1(RecyclerView.java:3829)
   at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:3639)
   at androidx.recyclerview.widget.RecyclerView.consumePendingUpdateOperations(RecyclerView.java:1877)
   at androidx.recyclerview.widget.RecyclerView$ViewFlinger.run(RecyclerView.java:5044)
   at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1092)
   at android.view.Choreographer.doCallbacks(Choreographer.java:893)
   at android.view.Choreographer.doFrame(Choreographer.java:809)
   at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1078)
   at android.os.Handler.handleCallback(Handler.java:891)
   at android.os.Handler.dispatchMessage(Handler.java:102)
   at android.os.Looper.loop(Looper.java:207)
   at android.app.ActivityThread.main(ActivityThread.java:7539)
   at java.lang.reflect.Method.invoke(Method.java)
   at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:958)

Answer 1

当两个不同的线程尝试访问您的回收视图实例以更新它时，会引发异常。

让我们澄清一下。假设线程 A 去更新你的回收视图，然后下一个线程 B 尝试做与 A 相同的事情。结果，抛出异常，说 A 已经在池中 ( Already in the pool!)

经过一些研究，为了找到解决方案，我发现了这些方法

同步方法

synchronized(recycleview)
{

}

池.SynchronizedPool

使用androidx.core.util.Pools.SynchronizedPool<T>而不是androidx.core.util.Pools.SimplePool

两种方法都尝试同步访问关键部分以避免引发异常。