0
我試圖開發一個應用程序，將有一個SearchView.I已經成功實現了篩選結果和ListView.But更新的邏輯當我取消或關閉搜索時， ListView上的數據不會恢復到它的舊列表中。我一直在嘗試所有可能的方法，並在此停留很長時間。請幫我解決這個問題。 這是我寫的代碼：ListView不更新後搜索使用SearchView在Android
MainActivity.java
package com.example.arushi.searchviewcustom;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.text.TextUtils;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
ListView lv_listname;
ArrayList<Beanclass> al_names,al_names2;
ArrayList<String> altype;
Adap ad_names;
ArrayAdapter<String> ad;
com.example.arushi.searchviewcustom.MaterialSearchView searchview;
Toolbar toolbar;
android.widget.Filter filter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
lv_listname = (ListView) findViewById(R.id.listView);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
// toolbar.setNavigationIcon(R.drawable.back_arrow_white);
searchview = (com.example.arushi.searchviewcustom.MaterialSearchView) findViewById(R.id.searchview);
al_names = new ArrayList<>();
/* altype=new ArrayList<>();
altype.add("Rushi");
altype.add("ayyappa");
altype.add("kiran");
altype.add("priya");
altype.add("swathi");
altype.add("pen");
altype.add("bat");
altype.add("cat");
ad = new ArrayAdapter<String>
(MainActivity.this,android.R.layout.simple_list_item_1,altype);
lv_listname.setAdapter(ad);
filter=ad.getFilter();*/
// ad.notifyDataSetChanged();
al_names.add(new Beanclass("Rushi", 22));
al_names.add(new Beanclass("Swathi", 22));
al_names.add(new Beanclass("Priya", 22));
al_names.add(new Beanclass("Kiran", 22));
al_names.add(new Beanclass("Laskshmi", 22));
al_names.add(new Beanclass("Hammad", 22));
al_names.add(new Beanclass("Anil", 22));
al_names.add(new Beanclass("Anand", 22));
al_names2=al_names;
ad_names = new Adap(MainActivity.this,al_names);
lv_listname.setAdapter(ad_names);
lv_listname.setTextFilterEnabled(false);
// filter = ad_names.getFilter();
//ad_names.notifyDataSetChanged();
/*setupSearchView();*/
searchview.setOnSearchViewListener(new
com.example.arushi.searchviewcustom.MaterialSearchView.SearchViewListener() {
@Override
public void onSearchViewShown() {
searchview.setVisibility(View.VISIBLE);
Toast.makeText(getApplicationContext(), "opened ", Toast.LENGTH_LONG).show();
toolbar.setVisibility(View.GONE);
}
@Override
public void onSearchViewClosed() {
// lv_listname.clearTextFilter();
Toast.makeText(getApplicationContext(), "closed ", Toast.LENGTH_LONG).show();
toolbar.setVisibility(View.VISIBLE);
}
});
searchview.setOnQueryTextListener(new com.example.arushi.searchviewcustom.MaterialSearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
if (TextUtils.isEmpty(newText)) {
lv_listname.clearTextFilter();
} else {
// lv_listname.setFilterText(newText);
ad_names.getFilter().filter(newText);
//filter.filter(newText);
}
return true;
}
});
lv_listname.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Toast.makeText(getApplicationContext(), "you clicked on " + al_names.get(position), Toast.LENGTH_LONG).show();
}
});
// searchview.setSubmitButtonEnabled(true);
searchview.setHint("Search Containers");
}
private void setupSearchView() {
// searchview.setIconifiedByDefault(false);
// searchview.seti
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
MenuItem item = menu.findItem(R.id.searchicon);
searchview.setMenuItem(item);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.searchicon) {
searchview.setVisibility(View.VISIBLE);
}
return super.onOptionsItemSelected(item);
}
}
這裏是我的AdapterClass
package com.example.arushi.searchviewcustom;
import android.content.Context;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.List;
class Adap extends BaseAdapter implements Filterable {
public ArrayList<Beanclass> mData;
public ArrayList<Beanclass> mFilteredData ;
Context ctx;
public Adap(Context ctx,ArrayList<Beanclass> al_names) {
mData=al_names;
mFilteredData=al_names;
this.ctx=ctx;
}
@Override
public int getCount() {
return mFilteredData.size();
}
@Override
public Object getItem(int position) {
return position;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public void notifyDataSetChanged() {
super.notifyDataSetChanged();
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// LayoutInflater lf =;
convertView = LayoutInflater.from(ctx).inflate(R.layout.pattern, parent, false);
TextView tv = (TextView) convertView.findViewById(R.id.textView);
TextView tv2 = (TextView) convertView.findViewById(R.id.textView2);
tv.setText(mFilteredData.get(position).getName());
tv2.setText("age:" + mFilteredData.get(position).getAge());
return convertView;
}
@Override
public Filter getFilter() {
/* if (mContactsFilter == null)
mContactsFilter = new Filterer(mData);
return mContactsFilter;
}*/
return new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults oReturn = new FilterResults();
ArrayList<Beanclass> results = new ArrayList<Beanclass>();
if (TextUtils.isEmpty(constraint))
// orig = al_namesfilter;
{
oReturn.count = mData.size();
oReturn.values = mData;
} else {
List<Beanclass> resultList = new ArrayList<>();
// if (orig != null && orig.size() > 0) {
for (final Beanclass g : mData) {
if ((g.getName().toLowerCase()
.contains(constraint.toString())))
// results.add(g);
resultList.add(g);
}
// }
oReturn.count = resultList.size();
oReturn.values = resultList;
}
return oReturn;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
/* al_namesfilter = (ArrayList<Beanclass>) results.values;
notifyDataSetChanged();*/
if (results.count == 0) {
notifyDataSetInvalidated();
} else {
mFilteredData = (ArrayList<Beanclass>) results.values;
notifyDataSetChanged();
}
}
};
}
}
請幫我我在哪裏做錯了嗎？