Android - 实现搜索过滤器到RecyclerView [英] Android - Implementing search filter to a RecyclerView
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问题描述
我需要实现一个基于EditText的搜索功能,我的RecyclerView列表必须被滤除,而typng
这里的代码是:
DisplayAdapter.java 这是适配器
public class DisplayAdapter extends RecyclerView.Adapter< DisplayAdapter.MyViewHolder> {
private List< DataHolder> displayedList;
public class MyViewHolder extends RecyclerView.ViewHolder {
public TextView english_d;
public MyViewHolder(View view){
super(view);
english_d =(TextView)view.findViewById(R.id.engword);
$ b public DisplayAdapter(List< DataHolder> displayedList){
this.displayedList = displayedList;
$ b @Override
public MyViewHolder onCreateViewHolder(ViewGroup parent,int position){
//创建布局
查看itemView = LayoutInflater.from( parent.getContext())。inflate(R.layout.list_item,parent,false);
返回新的MyViewHolder(itemView);
@Override
public void onBindViewHolder(MyViewHolder holder,int position){
DataHolder content = displayedList.get(position);
holder.english_d.setText(content.getEnglish());
@Override
public int getItemCount(){
return displayedList.size();
$ p DataHolder.java / p>
public class DataHolder {
private String english;
$ b public DataHolder(){
}
public DataHolder(String english,String norse){
this.english = english;
public String getEnglish(){
return english;
}
public void setEnglish(String english){
this.english = english;
$ b $ / code $ / pre
这里是我的片段使用:
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup容器,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_two_fragment,container,false);
rv =(RecyclerView)view.findViewById(R.id.list_view_english);
rv.setHasFixedSize(true);
inputSearch =(EditText)view.findViewById(R.id.inputSearch);
rv.addItemDecoration(new DividerItemDecoration(getActivity(),LinearLayoutManager.VERTICAL));
final LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity(),LinearLayoutManager.VERTICAL,false);
rv.setLayoutManager(layoutManager);
DisplayContent();
disp_adapter = new DisplayAdapter(displayedList);
rv.setAdapter(disp_adapter);
返回视图;
解决方案用于更新列表
public void updateList(List< DataHolder> list){
displayedList = list;
notifyDataSetChanged();
$ b $ p
$ b 添加用于搜索的textWatcher可以让您使用Edittext作为搜索字段
searchField.addTextChangedListener(new TextWatcher(){
@Override $ b $ public void onTextChanged(CharSequence s,int start, int before,int count){
// TODO自动生成方法存根
$ b @Override
public void beforeTextChanged(CharSequence s,int int count,int after){
// TODO自动生成的方法存根
}
@Override
public void afterTextChanged(Editable s ){
//从输入
过滤你的列表(s.toString());
//你可以使用可运行的postDelayed,比如500毫秒来延迟搜索文本
}
});
void filter(String text){
List< DataHolder> temp = new ArrayList();
for(DataHolder d:displayedList){
//或者使用.equal(text)与你想要的匹配
//使用.toLowerCase()获得更好的匹配
if( d.getEnglish()。contains(text)){
temp.add(d);
//更新recyclerview
disp_adapter.updateList(temp);
}
I need to implement a search feature based on an EditText to my RecyclerView the list must be filtered while typng
Here's the code :
DisplayAdapter.java this is the adapter
public class DisplayAdapter extends RecyclerView.Adapter<DisplayAdapter.MyViewHolder>{
private List<DataHolder> displayedList;
public class MyViewHolder extends RecyclerView.ViewHolder{
public TextView english_d;
public MyViewHolder(View view){
super(view);
english_d = (TextView) view.findViewById(R.id.engword);
}
}
public DisplayAdapter(List<DataHolder> displayedList){
this.displayedList = displayedList;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int position) {
// create a layout
View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.list_item, parent, false);
return new MyViewHolder(itemView);
}
@Override
public void onBindViewHolder(MyViewHolder holder, int position) {
DataHolder content = displayedList.get(position);
holder.english_d.setText(content.getEnglish());
}
@Override
public int getItemCount() {
return displayedList.size();
}
}
DataHolder.java
public class DataHolder {
private String english;
public DataHolder() {
}
public DataHolder(String english, String norse) {
this.english = english;
}
public String getEnglish() {
return english;
}
public void setEnglish(String english) {
this.english = english;
}
}
and here's the Fragment that I am working with :
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.activity_two_fragment, container, false);
rv = (RecyclerView) view.findViewById(R.id.list_view_english);
rv.setHasFixedSize(true);
inputSearch = (EditText) view.findViewById(R.id.inputSearch);
rv.addItemDecoration(new DividerItemDecoration(getActivity(), LinearLayoutManager.VERTICAL));
final LinearLayoutManager layoutManager = new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL, false);
rv.setLayoutManager(layoutManager);
DisplayContent();
disp_adapter = new DisplayAdapter(displayedList);
rv.setAdapter(disp_adapter);
return view;
}
解决方案 in your adapter add new function for update the list
public void updateList(List<DataHolder> list){
displayedList = list;
notifyDataSetChanged();
}
add textWatcher for search lets say you are using Edittext as search field
searchField.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// filter your list from your input
filter(s.toString());
//you can use runnable postDelayed like 500 ms to delay search text
}
});
void filter(String text){
List<DataHolder> temp = new ArrayList();
for(DataHolder d: displayedList){
//or use .equal(text) with you want equal match
//use .toLowerCase() for better matches
if(d.getEnglish().contains(text)){
temp.add(d);
}
}
//update recyclerview
disp_adapter.updateList(temp);
}
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