recyclerview过滤器在android studio中不工作

Question

我已经编码了getFilter()在适配器类和onQueryTextChange在mainactivity中，但不知道是什么问题，它不是过滤也不是搜索请帮助我需要实现一个搜索过滤器RecyclerView列表必须在输入时过滤。

这部分是在我的Mainactivity

@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.search, menu);
MenuItem item = menu.findItem(R.id.action_search);
SearchView searchView = (SearchView) item.getActionView();
searchView.setImeOptions(EditorInfo.IME_ACTION_DONE);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
BalanceReportAdapter myClass = new BalanceReportAdapter(jsonResponses, 
BalanceReport.this);
myClass.getFilter().filter(newText);
return false;
}
});
return  super.onCreateOptionsMenu(menu);
}

这个部分在我的Adapter.class

Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constaint) {
List<BalanceReportModel> filteredList = new ArrayList<>();
if (constaint.toString().isEmpty()) {
filteredList.addAll(retrievedResponses);
Log.e("you are here1",filteredList.toString());
} else {
for (BalanceReportModel patient : retrievedResponsesAll) {
if 

(patient.getcustomer().toLowerCase().contains(constaint.toString().toLowerCase()))
{
filteredList.add(patient);
}
}
Log.e("you are here2",retrievedResponses.toString());
}
FilterResults filterResults = new FilterResults();
filterResults.values = filteredList;
return filterResults;
}
@SuppressLint("NotifyDataSetChanged")
@Override
protected void publishResults(CharSequence constraint, FilterResults filterResults) {
Log.e("you are here3",filterResults.toString());
retrievedResponses.clear();
retrievedResponses.addAll((Collection<? extends BalanceReportModel>) filterResults.values);
notifyDataSetChanged();
}
};

我试了好几次都没有成功，谁来帮帮我吧。还有别的办法吗?如果我说错了请纠正我

Answer 1

似乎您每次都在onQueryTextChange中创建一个新的适配器

这个适配器实例在此之后不会被分配给recyclerView。我建议在顶层某处有一个适配器实例，然后调用该实例和.filter逻辑