搜索适配器 onbind 方法中的 IndexOutofBounexception？
IndexOutofBounexception in search adapter onbind method?
只要我开始搜索/过滤我的 recyclerview 列表结果，我就会不断从搜索适配器中的 onBind 方法中获取 IndexOutofBoundsException。
这是例外情况：
java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid item position 0(offset:0).state:25 android.support.v7.widget.RecyclerView{3247b3d VFED..... ......ID 0,0-1440,5550 #7f090216 app:id/search_guests_recycler_view}, adapter:com.myapp.ui.registervisitor.searchGuests.SearchGuestListAdapter@2433f32, layout:android.support.v7.widget.LinearLayoutManager@68f5483, context:com.myapp.ui.registervisitor.searchGuests.SearchGuestActivity@843713
at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5923)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5858)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5854)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2230)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1557)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924)
at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:3336)
at android.view.View.measure(View.java:24545)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:735)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:481)
at android.view.View.measure(View.java:24545)
at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1414)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.widget.ScrollView.onMeasure(ScrollView.java:452)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:733)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:805)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:733)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:805)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24545)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:735)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:481)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24545)
我在网上试了几篇文章，但没有成功。我试过的一些文章是： and RecyclerView: Inconsistency detected. Invalid item position
我针对此问题的适配器代码位于：
https://pastebin.com/VxsWWMiS
和相应的activity过滤代码：
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
mSearchGuestListAdapter.getFilter().filter(query);
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
mSearchGuestListAdapter.getFilter().filter(newText);
mSearchGuestListAdapter.notifyDataSetChanged();
mSearchGuestListAdapter.setFilter(newText);
if(mSearchGuestListAdapter.getItemCount() == 0){
String sourceString = "No match found for <b>" + newText + "</b> ";
mNoMatchTextView.setText(Html.fromHtml(sourceString));
} else {
mEmptyRelativeLayout.setVisibility(View.GONE);
mRecyclerView.setVisibility(View.VISIBLE);
}
return false;
}
});
如果需要，很乐意分享任何其他详细信息。有什么解决办法吗？
这是我的全部 activity 代码：https://pastebin.com/5qDN4yh9
这是主持人 class，其中 API 被称为：https://pastebin.com/YGiPGn8Z
这是模型class：https://pastebin.com/WCkPFnvU
这是一个 json 示例：https://pastebin.com/82R1zBHP
这是调用 recyclerview 的 xml 代码：https://pastebin.com/Z3QxPkSL "search_guests_recycler_view"
上面的堆栈跟踪似乎与您的代码没有隐式关联。以及由动画的内部 RecyclerView 实现引起的问题。还有described here。
1) 可能的解决方法，只需清除活动的 ViewHolders 池，这可能在动画中挂起。并且可以抛出 IndexOfBoundException。在任何 notifyDataSetChanged 之前调用以下方法。
mRecyclerView.getRecycledViewPool().clear();
mAdapter.notifyDataSetChanged();
2) 确保您的适配器中没有 notifyItemRangeChanged 或 notifyItemAdded（以及类似的）方法。使用 notifyDataSetChanged。当然你可以避免这种情况，但是你需要每次都使用单个集合并调试正确的位置才能使用这个特性。
3) 最后如您所见，这都是关于您的项目的动画和 RecyclerView 的内部行为。要从另一侧解决它，您可以覆盖 LayoutManager 并删除动画。这将确保您的实施中的职位没有问题。
/**
* Could be the same for Grid LayoutManager or Linear
**/
private static class NpaLinearLayoutManager extends LinearLayoutManager {
/**
* Disable predictive animations. There is a bug in RecyclerView which causes views that
* are being reloaded to pull invalid ViewHolders from the internal recycler stack if the
* adapter size has decreased since the ViewHolder was recycled.
*/
@Override
public boolean supportsPredictiveItemAnimations() {
return false;
}
// .....
}
替换所有 mSearchGuestListResponseList
在SearchGuestListAdapter#getItemCount()中，
并在 SearchGuestListAdapter#getItemViewType()
和mSearchGuestListResponseListFiltered；
您的代码中有多个注意事项可能会导致您的适配器不一致。
要了解过滤器 class 的工作原理，您应该注意，根据 official documentation:
Filtering operations performed by calling filter(java.lang.CharSequence) or filter(java.lang.CharSequence, android.widget.Filter.FilterListener) are performed asynchronously. When these methods are called, a filtering request is posted in a request queue and processed later. Any call to one of these methods will cancel any previous non-executed filtering request.
1。使用 Filter
的单个实例
过滤器 class 执行后台任务，其中调用了 performFiltering() 方法。为避免在键入时重叠过滤器，您应该避免使用过滤器的多个实例。在您的 SearchGuestListAdapter class:
不正确：
@Override
public Filter getFilter() {
// WRONG: Return new instance of Filter every time getFilter() is called
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
// Perform filtering...
return anything;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
// Update and Notify adapter...
}
};
}
替换为：
private final Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
// Perform filtering...
return anything;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
// Update and Notify adapter...
}
};
@Override
public Filter getFilter() {
// CORRECT: Always use the same Filter instance.
return this.filter;
}
2。您不应在 performFiltering()
中修改适配器变量
performFiltering() 方法在后台线程中执行。在这里你可以做一个很长的工作，从数据库中读取数据，如果需要的话甚至可以进行webservice同步请求。
但是，如果您在此处更改适配器列表，将导致屏幕上显示的 RecyclerView 与适配器列表的内容不一致。相反，您必须构建一个您将 return 使用 FilterResults 的临时列表。
使用以下结构修复 performFiltering()：
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
// Here is Background Thread, never alter adapter list in this method
String charString = charSequence.toString();
List<RegisterGuestList.Guest> filteredList = new ArrayList<>();
if (charString.isEmpty()) {
filteredList.addAll(mSearchGuestListResponseList);
} else {
... // fill filteredList as you did previously
}
FilterResults filterResults = new FilterResults();
filterResults.values = filteredList;
filterResults.count = filteredList.size(); // count is optional
return filterResults;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
// Here is Main Thread, safe to update list and notify adapter
mSearchGuestListResponseListFiltered = (ArrayList<RegisterGuestList.Guest>) filterResults.values;
searchText = charSequence.toString();
notifyDataSetChanged();
}
3。使用 FilterListener 在过滤器完成时得到通知。
在 SearchGuestActivity 的 onQueryTextChange() 中，您想要检查适配器列表大小以显示或隐藏空视图。由于过滤器在后台线程中工作，您必须使用 FilterListener 执行过滤器调用以检查空列表。
删除 SearchGuestListAdapter 的 setFilter() 方法，并使用以下结构修复 SearchGuestActivity 的 onQueryTextChange()：
@Override
public boolean onQueryTextChange(String newText) {
mSearchGuestListAdapter.getFilter().filter(newText, new Filter.FilterListener() {
@Override
public void onFilterComplete(int count) {
if (count == 0) {
// Show empty view...
} else {
// Show recyclerView...
}
}
});
// Don't call notifyDataSetChanged() or setFilter() here!
// Adaper will notified by publishResults() method
// mSearchGuestListAdapter.setFilter(newText);
// mSearchGuestListAdapter.notifyDataSetChanged();
return false;
}
只要我开始搜索/过滤我的 recyclerview 列表结果，我就会不断从搜索适配器中的 onBind 方法中获取 IndexOutofBoundsException。 这是例外情况：
java.lang.IndexOutOfBoundsException: Inconsistency detected. Invalid item position 0(offset:0).state:25 android.support.v7.widget.RecyclerView{3247b3d VFED..... ......ID 0,0-1440,5550 #7f090216 app:id/search_guests_recycler_view}, adapter:com.myapp.ui.registervisitor.searchGuests.SearchGuestListAdapter@2433f32, layout:android.support.v7.widget.LinearLayoutManager@68f5483, context:com.myapp.ui.registervisitor.searchGuests.SearchGuestActivity@843713
at android.support.v7.widget.RecyclerView$Recycler.tryGetViewHolderForPositionByDeadline(RecyclerView.java:5923)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5858)
at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5854)
at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2230)
at android.support.v7.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:1557)
at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1517)
at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:612)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3924)
at android.support.v7.widget.RecyclerView.onMeasure(RecyclerView.java:3336)
at android.view.View.measure(View.java:24545)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:735)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:481)
at android.view.View.measure(View.java:24545)
at android.widget.ScrollView.measureChildWithMargins(ScrollView.java:1414)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.widget.ScrollView.onMeasure(ScrollView.java:452)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:733)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:805)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.support.design.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:733)
at android.support.design.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:805)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24545)
at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:735)
at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:481)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:194)
at android.support.v7.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:143)
at android.view.View.measure(View.java:24545)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:6828)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:842)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:721)
at android.view.View.measure(View.java:24545)
我在网上试了几篇文章，但没有成功。我试过的一些文章是：
我针对此问题的适配器代码位于： https://pastebin.com/VxsWWMiS
和相应的activity过滤代码：
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
mSearchGuestListAdapter.getFilter().filter(query);
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
mSearchGuestListAdapter.getFilter().filter(newText);
mSearchGuestListAdapter.notifyDataSetChanged();
mSearchGuestListAdapter.setFilter(newText);
if(mSearchGuestListAdapter.getItemCount() == 0){
String sourceString = "No match found for <b>" + newText + "</b> ";
mNoMatchTextView.setText(Html.fromHtml(sourceString));
} else {
mEmptyRelativeLayout.setVisibility(View.GONE);
mRecyclerView.setVisibility(View.VISIBLE);
}
return false;
}
});
如果需要，很乐意分享任何其他详细信息。有什么解决办法吗？
这是我的全部 activity 代码：https://pastebin.com/5qDN4yh9
这是主持人 class，其中 API 被称为：https://pastebin.com/YGiPGn8Z
这是模型class：https://pastebin.com/WCkPFnvU
这是一个 json 示例：https://pastebin.com/82R1zBHP
这是调用 recyclerview 的 xml 代码：https://pastebin.com/Z3QxPkSL "search_guests_recycler_view"
上面的堆栈跟踪似乎与您的代码没有隐式关联。以及由动画的内部 RecyclerView 实现引起的问题。还有described here。
1) 可能的解决方法，只需清除活动的 ViewHolders 池，这可能在动画中挂起。并且可以抛出 IndexOfBoundException。在任何 notifyDataSetChanged 之前调用以下方法。
mRecyclerView.getRecycledViewPool().clear();
mAdapter.notifyDataSetChanged();
2) 确保您的适配器中没有 notifyItemRangeChanged 或 notifyItemAdded（以及类似的）方法。使用 notifyDataSetChanged。当然你可以避免这种情况，但是你需要每次都使用单个集合并调试正确的位置才能使用这个特性。
3) 最后如您所见，这都是关于您的项目的动画和 RecyclerView 的内部行为。要从另一侧解决它，您可以覆盖 LayoutManager 并删除动画。这将确保您的实施中的职位没有问题。
/**
* Could be the same for Grid LayoutManager or Linear
**/
private static class NpaLinearLayoutManager extends LinearLayoutManager {
/**
* Disable predictive animations. There is a bug in RecyclerView which causes views that
* are being reloaded to pull invalid ViewHolders from the internal recycler stack if the
* adapter size has decreased since the ViewHolder was recycled.
*/
@Override
public boolean supportsPredictiveItemAnimations() {
return false;
}
// .....
}
替换所有 mSearchGuestListResponseList
在SearchGuestListAdapter#getItemCount()中，
并在 SearchGuestListAdapter#getItemViewType()
和mSearchGuestListResponseListFiltered；
您的代码中有多个注意事项可能会导致您的适配器不一致。
要了解过滤器 class 的工作原理，您应该注意，根据 official documentation:
Filtering operations performed by calling filter(java.lang.CharSequence) or filter(java.lang.CharSequence, android.widget.Filter.FilterListener) are performed asynchronously. When these methods are called, a filtering request is posted in a request queue and processed later. Any call to one of these methods will cancel any previous non-executed filtering request.
1。使用 Filter
的单个实例过滤器 class 执行后台任务，其中调用了 performFiltering() 方法。为避免在键入时重叠过滤器，您应该避免使用过滤器的多个实例。在您的 SearchGuestListAdapter class:
不正确：
@Override
public Filter getFilter() {
// WRONG: Return new instance of Filter every time getFilter() is called
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
// Perform filtering...
return anything;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
// Update and Notify adapter...
}
};
}
替换为：
private final Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
// Perform filtering...
return anything;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
// Update and Notify adapter...
}
};
@Override
public Filter getFilter() {
// CORRECT: Always use the same Filter instance.
return this.filter;
}
2。您不应在 performFiltering()
中修改适配器变量performFiltering() 方法在后台线程中执行。在这里你可以做一个很长的工作，从数据库中读取数据，如果需要的话甚至可以进行webservice同步请求。
但是，如果您在此处更改适配器列表，将导致屏幕上显示的 RecyclerView 与适配器列表的内容不一致。相反，您必须构建一个您将 return 使用 FilterResults 的临时列表。
使用以下结构修复 performFiltering()：
@Override
protected FilterResults performFiltering(CharSequence charSequence) {
// Here is Background Thread, never alter adapter list in this method
String charString = charSequence.toString();
List<RegisterGuestList.Guest> filteredList = new ArrayList<>();
if (charString.isEmpty()) {
filteredList.addAll(mSearchGuestListResponseList);
} else {
... // fill filteredList as you did previously
}
FilterResults filterResults = new FilterResults();
filterResults.values = filteredList;
filterResults.count = filteredList.size(); // count is optional
return filterResults;
}
@Override
protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
// Here is Main Thread, safe to update list and notify adapter
mSearchGuestListResponseListFiltered = (ArrayList<RegisterGuestList.Guest>) filterResults.values;
searchText = charSequence.toString();
notifyDataSetChanged();
}
3。使用 FilterListener 在过滤器完成时得到通知。
在 SearchGuestActivity 的 onQueryTextChange() 中，您想要检查适配器列表大小以显示或隐藏空视图。由于过滤器在后台线程中工作，您必须使用 FilterListener 执行过滤器调用以检查空列表。
删除 SearchGuestListAdapter 的 setFilter() 方法，并使用以下结构修复 SearchGuestActivity 的 onQueryTextChange()：
@Override
public boolean onQueryTextChange(String newText) {
mSearchGuestListAdapter.getFilter().filter(newText, new Filter.FilterListener() {
@Override
public void onFilterComplete(int count) {
if (count == 0) {
// Show empty view...
} else {
// Show recyclerView...
}
}
});
// Don't call notifyDataSetChanged() or setFilter() here!
// Adaper will notified by publishResults() method
// mSearchGuestListAdapter.setFilter(newText);
// mSearchGuestListAdapter.notifyDataSetChanged();
return false;
}