在recyclerview中使用筛选方法自动搜索选项 [英] Autosearching option using filter method in recyclerview
本文介绍了在recyclerview中使用筛选方法自动搜索选项的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
在我的应用程序中，我使用cardview实现了一个recyclerview，以显示公司内部员工的列表。现在我想实现一个serch选项，用户可以通过这个选项来搜索员工的名字。我已经在网站上阅读过有关文件。我写了一个代码来实现一个serch选项。但不幸的是，我可以看到搜索选项，我可以写它，但它不能检测列表中的名称。我不知道我的代码里面有什么问题。这里是我的适配器类，其中我implment可Filterable mehtod
public class MyColleaguesAdapter extends RecyclerView.Adapter< MyColleaguesAdapter.ColleagueHolder>实现可过滤{
private static final String TAG =MyColleaguesAdapter;
protected List< MyColleageModel> colleagueObject;
protected List< MyColleageModel> filteredcolleague;
私有上下文上下文;
public MyColleaguesAdapter（List< MyColleageModel> colleagueObject，Context context）{
this.colleagueObject = colleagueObject;
this.filteredcolleague = colleagueObject;
this.context = context;
$ b @Override
public ColleagueHolder onCreateViewHolder（ViewGroup parent，int viewType）{
View view = LayoutInflater.from（parent.getContext（））
。发音（R.layout.colleage_row_layout，parent，false）;
返回新的同事管理者（查看）;
$ b @Override
public void onBindViewHolder（ColleagueHolder holder，int position）{
final MyColleageModel myColleague = colleagueObject.get（position）;
holder.name.setText（myColleague.getName（））;
holder.company.setText（myColleague.getCompany（））;
holder.title.setText（myColleague.getTitle（））;
holder.cardView.setTag（position）;
holder.cardView.setOnClickListener（new View.OnClickListener（）{
@Override
public void onClick（View view）{
int pos =（int）view.getTag（） ;
openDetailActivity（myColleague.getMobile（），myColleague.getMail（），myColleague.getName（），
myColleague.getCompany（），myColleague.getDepartment（），myColleague.getTitle（））;
}
}）;
@Override
public int getItemCount（）{
return colleagueObject.size（）;
}
//打开活动
private void openDetailActivity（String ... details）
{
Intent i = new Intent（context，DetailMyColleague.class）;
i.putExtra（mail，details [1]）;
........
context.startActivity（i）;
$ b @Override
public Filter getFilter（）{
return new Filter（）{
@SuppressWarnings（unchecked）
@Override
protected void publishResults（CharSequence constraint，FilterResults results）{
filteredcolleague =（List< MyColleageModel>）results.values;
MyColleaguesAdapter.this.notifyDataSetChanged（）;
$ b @Override
Filter FilterResults performFiltering（CharSequence constraint）{
List< MyColleageModel> filteredResults = null;
if（constraint.length（）== 0）{
filteredResults = colleagueObject;
} else {
filteredResults = getFilteredResults（constraint.toString（）。toLowerCase（））;
}
FilterResults results = new FilterResults（）;
results.values = filteredResults;
返回结果;
}
};
}
protected List< MyColleageModel> getFilteredResults（String constraint）{
List< MyColleageModel> results = new ArrayList<>（）; （item）：
（MyColleageModel item：colleagueObject）{
if（item.getName（）。toLowerCase（）。contains（constraint））{
results.add（item）;
Log.d（TAG，value is here+ item.getName（））;
}
}
返回结果;
public class ColleagueHolder extends RecyclerView.ViewHolder implements View.OnClickListener {
public CardView cardView;
公共TextView名称;
公共TextView公司;
公共TextView标题;
public ColleagueHolder（查看itemView）{
super（itemView）;
name =（TextView）itemView.findViewById（R.id.colleague_name）;
company =（TextView）itemView.findViewById（R.id.company_name）;
title =（TextView）itemView.findViewById（R.id.job_role）;
cardView =（CardView）itemView.findViewById（R.id.cvSingleUser）;
$ b $ p $这些是我的MainActivity
public class MyColleaguesPage extends AppCompatActivity implements SearchView.OnQueryTextListener {
private RecyclerView recyclerView;
私人CardView cardView;
私人MyColleaguesAdapter适配器;
私人列表< MyColleageModel> colleagueObject;
InputStream是;
@Override
protected void onCreate（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）;
setContentView（R.layout.mycolleagues_layout）;
$ b $ //显示并启用Home / Up按钮上的点击
if（getSupportActionBar（）！= null）{
getSupportActionBar（）。setDisplayHomeAsUpEnabled（true）;
getSupportActionBar（）。setDisplayShowHomeEnabled（true）;
}
cardView =（CardView）findViewById（R.id.cvSingleUser）;
recyclerView =（RecyclerView）findViewById（R.id.colleagues_recycler）;
recyclerView.setHasFixedSize（true）;
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager（MyColleaguesPage.this）;
recyclerView.setLayoutManager（layoutManager）;
new JSONTask（）。execute（）;
$ b @Override
public boolean onQueryTextSubmit（String query）{
return false;
}
@Override
public boolean onQueryTextChange（String newText）{
List< MyColleageModel> filteredModelList = filter（colleagueObject，newText）;
if（filteredModelList.size（）> 0）{
//myPhotosAdapter.setFilter(filteredModelList）;
返回true;
} else {
Toast.makeText（MyColleaguesPage.this，Not Found，Toast.LENGTH_SHORT）.show（）;
返回false;
$ b public class JSONTask extends AsyncTask< String，String，List< MyColleageModel>> {
@Override
保护无效onPreExecute（）{
super.onPreExecute（）;
}
@Override
protected List< MyColleageModel> doInBackground（String ... params）{
colleagueObject = new ArrayList< MyColleageModel>（）;
try {
// withou Gson
JSONObject obj = new JSONObject（loadJSONFromAsset（））;
JSONArray m_jArry = obj.getJSONArray（contacts）;
MyColleageModel my_clg;
for（int i = 0; i< m_jArry.length（）; i ++）{
JSONObject jo_inside = m_jArry.getJSONObject（i）;
字符串val1 = jo_inside.getString（mobile）;
字符串val2 = jo_inside.getString（mail）;
字符串val3 = jo_inside.getString（name）;
字符串val4 = jo_inside.optString（company）;
字符串val5 = jo_inside.optString（department）;
字符串val6 = jo_inside.optString（title）;
my_clg = new MyColleageModel（val1，val2，val3，val4，val5，val6）;
colleagueObject.add（my_clg）;
$ b $ catch（JSONException e）{
e.printStackTrace（）;
}
返回null;
$ b @Override
protected void onPostExecute（final List< MyColleageModel> result）{
super.onPostExecute（result）;
adapter = new MyColleaguesAdapter（colleagueObject，getApplicationContext（））;
recyclerView.setAdapter（adapter）;
adapter.notifyDataSetChanged（）;
$ b private String loadJSONFromAsset（）{
....
}
@覆盖
public boolean onCreateOptionsMenu（Menu menu）{
$ b $ getMenuInflater（）。inflate（R.menu.recyclerviewmenu，menu）;
final MenuItem search = menu.findItem（R.id.search）;
最终SearchView searchView =（SearchView）MenuItemCompat.getActionView（search）;
searchView.setOnQueryTextListener（this）;
返回true;
}
私人列表< MyColleageModel> filter（List< MyColleageModel> models，String query）{
query = query.toLowerCase（）;
最终列表< MyColleageModel> filteredModelList = new ArrayList<>（）; （MyColleageModel model：models）
{
final String text = model.getName（）。toLowerCase（）。toString（）;
if（text.contains（query））{
filteredModelList.add（model）;
$ b在你的适配器中的arraylist
adapter = new MyColleaguesAdapter（colleagueObject，getApplicationContext（））;
recyclerView.setAdapter（adapter）;
adapter.notifyDataSetChanged（）;
return filteredModelList;
@Override
public boolean onOptionsItemSelected（MenuItem item）{
int id = item.getItemId（）;
if（id == android.R.id.home）{
finish（）;
}
return super.onOptionsItemSelected（item）;
code
$ b $ p
$ b 这是我的recyclerviewmenu.xml
< menu xmlns：android =http://schemas.android.com/apk / res / android
xmlns：app =http://schemas.android.com/apk/res-auto
xmlns：tools =http://schemas.android.com/tools tools：context =myColleagues.MyColleaguesPage>
android：icon =@ drawable / ic_search
android：title =Search
app：showAsAction =ifRoom | collapseActionView
app：actionViewClass =android.support.v7.widget.SearchView/>
< / menu>
我没有在代码中看到错误。 =h2_lin>解决方案
遵循这个stpes
第1步实现 SearchView。 OnQueryTextListener inactivity
第2步 onCreateOptionsMenu 写入下面的代码
@Override
public boolean onCreateOptionsMenu（Menu menu）{
getMenuInflater（）。inflate R.menu.menu_album_search，menu）;
final MenuItem item = menu.findItem（R.id.menu_search_album）;
final SearchView searchView =（SearchView）MenuItemCompat.getActionView（item）;
searchView.setOnQueryTextListener（this）;
返回true;
}
第3步写在 onQueryTextChange（）方法
@Override
public boolean onQueryTextChange（String newText） {
列表< MyColleageModel> filteredModelList = filter（data_fieldses，newText）;
if（filteredModelList.size（）> 0）{
//myPhotosAdapter.setFilter(filteredModelList）;
返回true;
} else {
Toast.makeText（MyPhotosActivity.this，Not Found，Toast.LENGTH_SHORT）.show（）;
返回false;
$ b 第4步 strong>
私人列表< MyColleageModel> filter（List< MyColleageModel> models，String query）{
query = query.toLowerCase（）;
最终列表< MyColleageModel> filteredModelList = new ArrayList<>（）; （MyColleageModel model：models）
（
final String text = model.getImagename（）。toLowerCase（）。toString（）;
if（text.contains（query））{
filteredModelList.add（model）;
//你的适配器中的数组列表
myPhotosAdapter = new MyPhotosAdapter（MyPhotosActivity.this，（ArrayList< MyColleageModel>）filteredModelList）;
recyclerViewMyPhotos.setLayoutManager（新的GridLayoutManager（MyPhotosActivity.this，2））;
recyclerViewMyPhotos.setAdapter（myPhotosAdapter）;
myPhotosAdapter.notifyDataSetChanged（）;
返回filteredModelList;
$ / code>
在任何查询的情况下询问我
In my app I have implemented a recyclerview with cardview to show the list of the employee inside a company. Now I want to implement a serch option by which user can search with the name of the employee. I have read related document in website about it. I wrote a code to implement a serch option. But unfortunately I can see the search option and I can write it but it cannot detect the name from the list. I do not know what is the problem inside my code. Here is my adapter class where I implment Filterable mehtod
public class MyColleaguesAdapter extends RecyclerView.Adapter<MyColleaguesAdapter.ColleagueHolder> implements Filterable {
private static final String TAG = "MyColleaguesAdapter";
protected List<MyColleageModel> colleagueObject;
protected List<MyColleageModel> filteredcolleague;
private Context context;
public MyColleaguesAdapter(List<MyColleageModel> colleagueObject, Context context) {
this.colleagueObject = colleagueObject;
this.filteredcolleague=colleagueObject;
this.context = context;
}
@Override
public ColleagueHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view= LayoutInflater.from(parent.getContext())
.inflate(R.layout.colleage_row_layout,parent,false);
return new ColleagueHolder(view);
}
@Override
public void onBindViewHolder(ColleagueHolder holder, int position) {
final MyColleageModel myColleague=colleagueObject.get(position);
holder.name.setText(myColleague.getName());
holder.company.setText(myColleague.getCompany());
holder.title.setText(myColleague.getTitle());
holder.cardView.setTag(position);
holder.cardView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
int pos = (int)view.getTag();
openDetailActivity(myColleague.getMobile(),myColleague.getMail(), myColleague.getName(),
myColleague.getCompany(), myColleague.getDepartment(), myColleague.getTitle());
}
});
}
@Override
public int getItemCount() {
return colleagueObject.size();
}
//open activity
private void openDetailActivity(String...details)
{
Intent i=new Intent(context,DetailMyColleague.class);
i.putExtra("mail",details[1]);
........
context.startActivity(i);
}
@Override
public Filter getFilter() {
return new Filter() {
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
filteredcolleague = (List<MyColleageModel>) results.values;
MyColleaguesAdapter.this.notifyDataSetChanged();
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
List<MyColleageModel> filteredResults = null;
if (constraint.length() == 0) {
filteredResults = colleagueObject;
} else {
filteredResults = getFilteredResults(constraint.toString().toLowerCase());
}
FilterResults results = new FilterResults();
results.values = filteredResults;
return results;
}
};
}
protected List<MyColleageModel> getFilteredResults(String constraint) {
List<MyColleageModel> results = new ArrayList<>();
for (MyColleageModel item : colleagueObject) {
if (item.getName().toLowerCase().contains(constraint)) {
results.add(item);
Log.d( TAG,"value is here "+item.getName());
}
}
return results;
}
public class ColleagueHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public CardView cardView;
public TextView name;
public TextView company;
public TextView title;
public ColleagueHolder(View itemView) {
super(itemView);
name=(TextView) itemView.findViewById(R.id.colleague_name);
company=(TextView)itemView.findViewById(R.id.company_name);
title=(TextView) itemView.findViewById(R.id.job_role);
cardView=(CardView)itemView.findViewById(R.id.cvSingleUser);
}
}
Here is my MainActivity
public class MyColleaguesPage extends AppCompatActivity implements SearchView.OnQueryTextListener{
private RecyclerView recyclerView;
private CardView cardView;
private MyColleaguesAdapter adapter;
private List<MyColleageModel> colleagueObject;
InputStream is;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.mycolleagues_layout);
// Showing and Enabling clicks on the Home/Up button
if (getSupportActionBar() != null) {
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setDisplayShowHomeEnabled(true);
}
cardView=(CardView)findViewById(R.id.cvSingleUser);
recyclerView = (RecyclerView) findViewById(R.id.colleagues_recycler);
recyclerView.setHasFixedSize(true);
RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(MyColleaguesPage.this);
recyclerView.setLayoutManager(layoutManager);
new JSONTask().execute();
}
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
List<MyColleageModel> filteredModelList = filter(colleagueObject, newText);
if (filteredModelList.size() > 0) {
//myPhotosAdapter.setFilter(filteredModelList);
return true;
} else {
Toast.makeText(MyColleaguesPage.this, "Not Found", Toast.LENGTH_SHORT).show();
return false;
}
}
public class JSONTask extends AsyncTask<String, String, List<MyColleageModel>> {
@Override
protected void onPreExecute() {
super.onPreExecute();
}
@Override
protected List<MyColleageModel> doInBackground(String... params) {
colleagueObject = new ArrayList<MyColleageModel>();
try {
//withou Gson
JSONObject obj = new JSONObject(loadJSONFromAsset());
JSONArray m_jArry = obj.getJSONArray("contacts");
MyColleageModel my_clg;
for (int i = 0; i < m_jArry.length(); i++) {
JSONObject jo_inside = m_jArry.getJSONObject(i);
String val1 = jo_inside.getString("mobile");
String val2 = jo_inside.getString("mail");
String val3 = jo_inside.getString("name");
String val4 = jo_inside.optString("company");
String val5 = jo_inside.optString("department");
String val6 = jo_inside.optString("title");
my_clg = new MyColleageModel(val1, val2, val3, val4, val5, val6);
colleagueObject.add(my_clg);
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(final List<MyColleageModel> result) {
super.onPostExecute(result);
adapter = new MyColleaguesAdapter(colleagueObject, getApplicationContext());
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
}
}
private String loadJSONFromAsset() {
....
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.recyclerviewmenu, menu);
final MenuItem search = menu.findItem(R.id.search);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(search);
searchView.setOnQueryTextListener(this);
return true;
}
private List<MyColleageModel> filter(List<MyColleageModel> models, String query) {
query = query.toLowerCase();
final List<MyColleageModel> filteredModelList = new ArrayList<>();
for (MyColleageModel model : models) {
final String text = model.getName().toLowerCase().toString();
if (text.contains(query)) {
filteredModelList.add(model);
}
}
// arraylist in your adapter
adapter = new MyColleaguesAdapter(colleagueObject, getApplicationContext());
recyclerView.setAdapter(adapter);
adapter.notifyDataSetChanged();
return filteredModelList;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
finish();
}
return super.onOptionsItemSelected(item);
}
}
And this is my recyclerviewmenu.xml
<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools" tools:context="myColleagues.MyColleaguesPage">
<item
android:id="@+id/search"
android:icon="@drawable/ic_search"
android:title="Search"
app:showAsAction="ifRoom|collapseActionView"
app:actionViewClass="android.support.v7.widget.SearchView"/>
</menu>
I am not getting the error inside my code.
解决方案 follow this stpes
step 1 implements SearchView.OnQueryTextListener in youractivity
step 2 in onCreateOptionsMenu write below code
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_album_search, menu);
final MenuItem item = menu.findItem(R.id.menu_search_album);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(this);
return true;
}
step 3 write this in onQueryTextChange() method
@Override
public boolean onQueryTextChange(String newText) {
List<MyColleageModel> filteredModelList = filter(data_fieldses, newText);
if (filteredModelList.size() > 0) {
//myPhotosAdapter.setFilter(filteredModelList);
return true;
} else {
Toast.makeText(MyPhotosActivity.this, "Not Found", Toast.LENGTH_SHORT).show();
return false;
}
}
step 4
private List<MyColleageModel> filter(List<MyColleageModel> models, String query) {
query = query.toLowerCase();
final List<MyColleageModel> filteredModelList = new ArrayList<>();
for (MyColleageModel model : models) {
final String text = model.getImagename().toLowerCase().toString();
if (text.contains(query)) {
filteredModelList.add(model);
}
}
// arraylist in your adapter
myPhotosAdapter = new MyPhotosAdapter( MyPhotosActivity.this, (ArrayList<MyColleageModel>) filteredModelList);
recyclerViewMyPhotos.setLayoutManager(new GridLayoutManager(MyPhotosActivity.this, 2));
recyclerViewMyPhotos.setAdapter(myPhotosAdapter);
myPhotosAdapter.notifyDataSetChanged();
return filteredModelList;
}
ask me in case of any query
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