对子值进行排序。 当我键入搜索工作正常,但当我删除键入的字母时,列表不更新。
我的模特课
public class Category {
public class SubCategory
{
public String name;
public SubCategory(String name)
{
this.name = name;
}
}
public String name;
public ArrayList<SubCategory> categories;
public Category(String name, ArrayList<SubCategory> categories)
{
this.name = name;
this.categories = categories;
}
}
适配器片段
private ArrayList<Category> data;
private ArrayList<Category> originalData;
public CategoryListAdapter(Context context, ArrayList<Category> data)
{
this.context = context;
this.data = data;
this.originalData = new ArrayList<>();
this.originalData.addAll(data); }
public Filter getFilter() {
MyFilter filter = new MyFilter();
return filter;
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
String filterString = constraint.toString().toLowerCase();
Log.i("Tag" , filterString);
final ArrayList<Category> processData = originalData;
if(filterString.isEmpty()){
results.values = processData;
results.count = processData.size();
Log.i("Tag" , "original"+ originalData.get(0).categories.size());
}else {
int count = processData.size();
ArrayList<Category> nlist = new ArrayList<>();
for (int i = 0; i < count; i++) {
Category cat = processData.get(i);
final ArrayList<RequestCategory> req_catgories = processData.get(i).categories;
final ArrayList<RequestCategory> new_list = new ArrayList<>();
for (RequestCategory req_catgory : req_catgories) {
if (req_catgory.display_name.toLowerCase().contains(filterString)) {
new_list.add(req_catgory);
Log.i("Sub category", "added");
}
}
cat.categories = new_list;
nlist.add(cat);
}
results.values = nlist;
results.count = nlist.size();
}
Log.i("VALUES", results.values.toString());
return results;
}
问题出在哪里?我想我的原始列表在某处被修改了? 有什么帮助吗?
答案 0 :(得分:1)
在performFiltering方法中进行以下更改:
替换
final ArrayList<Category> processData = originalData;
与
final ArrayList<Category> processData = new ArrayList<>();
processData.addAll(originalData);
目前您的processData正在引用originalData数组,当您修改processData数组时,您的originalData也会更改。
答案 1 :(得分:0)
请添加试试这个以进行一些更改..!
private ArrayList<Category> data;
private ArrayList<Category> searchData;
private ArrayList<Category> originalData;
public CategoryListAdapter(Context context, ArrayList<Category> data) {
this.context = context;
this.data = data;
this.searchData = data;
this.originalData = data;
}
public Filter getFilter() {
MyFilter filter = new MyFilter();
return filter;
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
String filterString = constraint.toString().toLowerCase();
Log.i("Tag", filterString);
final ArrayList<Category> processData = searchData;
if (filterString.isEmpty()) {
results.values = processData;
results.count = processData.size();
Log.i("Tag", "original" + originalData.get(0).categories.size());
} else {
int count = processData.size();
ArrayList<Category> nlist = new ArrayList<>();
for (int i = 0; i < count; i++) {
Category cat = processData.get(i);
final ArrayList<RequestCategory> req_catgories = processData.get(i).categories;
final ArrayList<RequestCategory> new_list = new ArrayList<>();
for (RequestCategory req_catgory : req_catgories) {
if (req_catgory.display_name.toLowerCase().contains(filterString)) {
new_list.add(req_catgory);
Log.i("Sub category", "added");
}
}
cat.categories = new_list;
nlist.add(cat);
}
results.values = nlist;
results.count = nlist.size();
}
Log.i("VALUES", results.values.toString());
return results;
}
我希望它对你有帮助..!
答案 2 :(得分:0)
将以下代码替换为Filter中的部分代码。
if(filterString==null||filterString.equals("")||filterString.length()==0){
new_list.addAll(req_catgories);
}else{
for (RequestCategory req_catgory : req_catgories) {
if (req_catgory.display_name.toLowerCase().contains(filterString)) {
new_list.add(req_catgory);
Log.i("Sub category", "added");
}
}}