标签：android android-recyclerview search android-cardview filter
在我的应用程序中,我实现了带有cardview的recyclerview以显示公司内部员工的列表.现在,我想实现一个serch选项,用户可以通过该选项搜索雇员的姓名.我已经在网站上阅读了有关文件.我编写了代码来实现serch选项.但不幸的是,我可以看到搜索选项,并且可以编写它,但是它无法从列表中检测到该名称.我不知道我的代码内的问题是什么.这是我的适配器类,我在其中实现了可过滤的方法
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);
}
}
这是我的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);
}
}
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">
<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>
我的代码中没有错误.
解决方法:
按照这个步骤
步骤1在youractivity中实现SearchView.OnQueryTextListener
onCreateOptionsMenu中的步骤2编写以下代码
@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);
return true;
}
步骤3在onQueryTextChange()方法中编写
@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;
}
}
第四步
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;
}
如有疑问请问我
标签：android,android-recyclerview,search,android-cardview,filter 来源： https://codeday.me/bug/20191013/1910347.html
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