android - 当适配器注册了观察者时，无法更改此适配器是否具有稳定 ID

Question

我在我的 android 项目中使用 RecyclerView，它的性能非常糟糕。来自答案here ，我尝试将 adapter.setHasStableIds(true); 添加到我的代码中。运行时报错:

java.lang.IllegalStateException: Cannot change whether this adapter has stable IDs while the adapter has registered observers.

我的完整logCat如下；

09-22 22:22:23.634 1808-1808/com.revosleap.movielist E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.revosleap.movielist, PID: 1808
java.lang.IllegalStateException: Cannot change whether this adapter has stable IDs while the adapter has registered observers.
    at android.support.v7.widget.RecyclerView$Adapter.setHasStableIds(RecyclerView.java:6749)
    at com.revosleap.movielist.Utils.UrlUtils.GenreFetcher.getGenre(GenreFetcher.java:48)
    at com.revosleap.movielist.MainActivity$2.onItemSelected(MainActivity.java:221)
    at android.widget.AdapterView.fireOnSelected(AdapterView.java:1124)
    at android.widget.AdapterView.access$200(AdapterView.java:54)
    at android.widget.AdapterView$SelectionNotifier.run(AdapterView.java:1089)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:145)
    at android.app.ActivityThread.main(ActivityThread.java:5942)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1400)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1195)

请问我该如何解决这个问题？

Answer 1

在将适配器分配给 recyclerview 之前，您必须将适配器的 hasStableIds 设置为 true。

YourAdapter adapter = new YourAdapter();
adapter.setHasStableIds(true);
myRecyclerView.setAdapter(adapter);