Java RecyclerView项目选择引发错误
我试图在SelectionTracker的帮助下在RecyclerView中实现项目选择功能,但是获取IllegalArgumentException和stacktrace并不直观,因为它只显示元数据 这就是我如何建立追踪器 令人惊讶的是,我在Kotlin中实现了相同的代码,并且在那里工作得很好。我发现了一篇有类似问题的SO帖子,被接受的答案建议传递一个定制的ItemKeyProvider,而不是StableIdKeyProvider。因此,在这样做时,我犯了这个错误 Stacktrace 2Java RecyclerView项目选择引发错误,java,android,android-recyclerview,Java,Android,Android Recyclerview,我试图在SelectionTracker的帮助下在RecyclerView中实现项目选择功能,但是获取IllegalArgumentException和stacktrace并不直观,因为它只显示元数据 这就是我如何建立追踪器 令人惊讶的是,我在Kotlin中实现了相同的代码,并且在那里工作得很好。我发现了一篇有类似问题的SO帖子,被接受的答案建议传递一个定制的ItemKeyProvider,而不是StableIdKeyProvider。因此,在这样做时,我犯了这个错误 Stacktrace 2
java.lang.IllegalArgumentException
at androidx.core.util.Preconditions.checkArgument(Preconditions.java:38)
at androidx.recyclerview.selection.DefaultSelectionTracker.anchorRange(DefaultSelectionTracker.java:269)
at androidx.recyclerview.selection.MotionInputHandler.selectItem(MotionInputHandler.java:60)
at androidx.recyclerview.selection.TouchInputHandler.onLongPress(TouchInputHandler.java:132)
at androidx.recyclerview.selection.GestureRouter.onLongPress(GestureRouter.java:96)
at android.view.GestureDetector.dispatchLongPress(GestureDetector.java:778)
at android.view.GestureDetector.-wrap0(Unknown Source:0)
at android.view.GestureDetector$GestureHandler.handleMessage(GestureDetector.java:293)
at android.os.Handler.dispatchMessage(Handler.java:105)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
java.lang.IllegalStateException: Two different ViewHolders have the same stable ID. Stable IDs in your adapter MUST BE unique and SHOULD NOT change.
ViewHolder 1:ViewHolder{987472c position=1 id=-1, oldPos=-1, pLpos:-1}
View Holder 2:ViewHolder{e50e5f5 position=2 id=-1, oldPos=-1, pLpos:-1 not recyclable(1)} androidx.recyclerview.widget.RecyclerView{617d73 VFED..... .F....ID 42,42-1038,1542 #7f08007b app:id/recyclerview}, adapter:com.example.roomwordssample.WordAdapter@7ada430, layout:androidx.recyclerview.widget.GridLayoutManager@a15b8a9, context:com.example.roomwordssample.Main2Activity@ca1d275
at androidx.recyclerview.widget.RecyclerView.handleMissingPreInfoForChangeError(RecyclerView.java:4058)
at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep3(RecyclerView.java:3982)
at androidx.recyclerview.widget.RecyclerView.dispatchLayout(RecyclerView.java:3652)
at androidx.recyclerview.widget.RecyclerView.consumePendingUpdateOperations(RecyclerView.java:1877)
at androidx.recyclerview.widget.RecyclerView$1.run(RecyclerView.java:407)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
at android.view.Choreographer.doCallbacks(Choreographer.java:723)
at android.view.Choreographer.doFrame(Choreographer.java:655)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
更新的跟踪器
wordAdapter.tracker=new SelectionTracker.Builder(
“mySelectionId”,
回收视图,
新的GetItemDetails(recyclerView、ItemKeyProvider.SCOPE_映射),
新MyDetailsLookUp(回收视图),
StorageStrategy.createLongStorage()
).带选择谓词(
SelectionPredicates.createSelectAnything()的
).build();
CustomItemKeyProvider
类CustomItemKeyProvider扩展了ItemKeyProvider{
回收视图回收视图;
CustomItemKeyProvider(RecyclerView RecyclerView,int范围){
超级(范围);
this.recyclerView=recyclerView;
}
@可空
@凌驾
公共长getKey(int位置){
返回wordAdapter.getItemId(位置);
}
@凌驾
public int getPosition(@NonNull长键){
RecyclerView.ViewHolder ViewHolder=RecyclerView.findViewHolderForItemId(键);
return viewHolder==null?RecyclerView.NO_位置:viewHolder.getLayoutPosition();
}
}
注意:wordAdapter.setHasStableIds(true)
在stacktrace中将适配器设置为RecyclerView
之前完成:
java.lang.IllegalStateException: Two different ViewHolders have the same stable ID. Stable IDs in your adapter MUST BE unique and SHOULD NOT change.
ViewHolder 1:ViewHolder{987472c **position=1 id=-1**, oldPos=-1, pLpos:-1}
View Holder 2:ViewHolder{e50e5f5 **position=2 id=-1**, oldPos=-1, pLpos:-1 not recyclable(1)}
在上面的错误中,它表示列表中的位置1和位置2使用相同的ID,但必须是唯一的。要与选择跟踪器一起使用,请确保您具有唯一的id。
通知列表您有稳定的ID
setHasStableIds(true)
在RecyclerView.Adapter中,您需要确保为每个适配器使用唯一的
public abstract class WordAdapter extends RecyclerView.Adapter {
private List<Item> itemsList = new ArrayList<>();
//other override methods
@Override
public long getItemId(int position) {
return position; // here each value must be unique either position or data unique id
}
}
公共抽象类WordAdapter扩展了RecyclerView.Adapter{
私有列表项列表=新的ArrayList();
//其他覆盖方法
@凌驾
公共长getItemId(int位置){
return position;//此处每个值必须是唯一的位置id或数据唯一id
}
}
在stacktrace中:
java.lang.IllegalStateException: Two different ViewHolders have the same stable ID. Stable IDs in your adapter MUST BE unique and SHOULD NOT change.
ViewHolder 1:ViewHolder{987472c **position=1 id=-1**, oldPos=-1, pLpos:-1}
View Holder 2:ViewHolder{e50e5f5 **position=2 id=-1**, oldPos=-1, pLpos:-1 not recyclable(1)}
在上面的错误中,它表示列表中的位置1和位置2使用相同的ID,但必须是唯一的。要与选择跟踪器一起使用,请确保您具有唯一的id。
通知列表您有稳定的ID
setHasStableIds(true)
在RecyclerView.Adapter中,您需要确保为每个适配器使用唯一的
public abstract class WordAdapter extends RecyclerView.Adapter {
private List<Item> itemsList = new ArrayList<>();
//other override methods
@Override
public long getItemId(int position) {
return position; // here each value must be unique either position or data unique id
}
}
公共抽象类WordAdapter扩展了RecyclerView.Adapter{
私有列表项列表=新的ArrayList();
//其他覆盖方法
@凌驾
公共长getItemId(int位置){
return position;//此处每个值必须是唯一的位置id或数据唯一id
}
}
由于适配器具有稳定的id,它必须为每个适配器位置返回唯一的id。现在如何返回该Id?由于适配器具有稳定的Id,它必须为每个适配器位置返回唯一的Id。你现在如何归还身份证?
class CustomItemKeyProvider extends ItemKeyProvider<Long> {
RecyclerView recyclerView;
CustomItemKeyProvider(RecyclerView recyclerView, int scope) {
super(scope);
this.recyclerView = recyclerView;
}
@Nullable
@Override
public Long getKey(int position) {
return wordAdapter.getItemId(position);
}
@Override
public int getPosition(@NonNull Long key) {
RecyclerView.ViewHolder viewHolder = recyclerView.findViewHolderForItemId(key);
return viewHolder == null ? RecyclerView.NO_POSITION : viewHolder.getLayoutPosition();
}
}
java.lang.IllegalStateException: Two different ViewHolders have the same stable ID. Stable IDs in your adapter MUST BE unique and SHOULD NOT change.
ViewHolder 1:ViewHolder{987472c **position=1 id=-1**, oldPos=-1, pLpos:-1}
View Holder 2:ViewHolder{e50e5f5 **position=2 id=-1**, oldPos=-1, pLpos:-1 not recyclable(1)}
public abstract class WordAdapter extends RecyclerView.Adapter {
private List<Item> itemsList = new ArrayList<>();
//other override methods
@Override
public long getItemId(int position) {
return position; // here each value must be unique either position or data unique id
}
}