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확장형 목록보기에서 검색 필터를 구현하려고합니다.확장형 목록보기에서 검색을 구현할 수 없습니다.
그러나 editText에 키워드를 입력하려고 할 때 응용 프로그램이 손상됩니다.
다음은 두 개의 자바 클래스 인 MainActivity과 ExpandableListAdapter입니다.
MainActivity 클래스
package com.ahmedabadjobs.dashboard;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.view.View;
import android.widget.EditText;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnGroupClickListener;
import androidhive.dashboard.R;
import com.ahmedabadjobs.expandablelistview.ExpandableListAdapter;
public class MainActivity extends Activity {
/** Called when the activity is first created. */
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
List<String> listDataHeader;
HashMap<String, List<String>> listDataChild;
EditText inputSearch;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// get the listview
expListView = (ExpandableListView) findViewById(R.id.lvExp);
// preparing list data
prepareListData();
listAdapter = new ExpandableListAdapter(this, listDataHeader,
listDataChild);
// setting list adapter
expListView.setAdapter(listAdapter);
// Listview Group click listener
expListView.setOnGroupClickListener(new OnGroupClickListener() {
@Override
public boolean onGroupClick(ExpandableListView parent, View v,
int groupPosition, long id) {
// Toast.makeText(getApplicationContext(),
// "Group Clicked " + listDataHeader.get(groupPosition),
// Toast.LENGTH_SHORT).show();
return false;
}
});
inputSearch = (EditText) findViewById(R.id.inputSearch);
inputSearch.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence cs, int arg1, int arg2,
int arg3) {
// ((Filter) listAdapter.getFilter()).filter(cs);
NewsFeedActivity.this.listAdapter.getFilter().filter(cs);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1,
int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable arg0) {
// When user changed the Text
}
});
}
/*
* Preparing the list data
*/
private void prepareListData() {
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
// Adding child data
listDataHeader.add("Company 0");
listDataHeader.add("Company 1");
listDataHeader.add("Company 2");
// Adding child data
List<String> cignex = new ArrayList<String>();
company0.add("Address Line 1");
company0.add("Address Line 2");
company0.add("Address Line 3");
company0.add("Phone number");
company0.add("Email Address");
List<String> company1 = new ArrayList<String>();
company1.add("Address Line 1");
company1.add("Address Line 2");
company1.add("Address Line 3");
company1.add("Phone number");
company1.add("Email Address");
List<String> company2 = new ArrayList<String>();
company2.add("Address Line 1");
company2.add("Address Line 2");
company2.add("Address Line 3");
company2.add("Phone number");
company2.add("Email Address");
listDataChild.put(listDataHeader.get(0), company0); // Header, Child
// data
listDataChild.put(listDataHeader.get(1), company1);
listDataChild.put(listDataHeader.get(2), company2);
}
}
ExpandableListAdapter 클래스
package com.ahmedabadjobs.expandablelistview;
import java.util.HashMap;
import java.util.List;
import android.content.Context;
import android.graphics.Typeface;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.TextView;
import androidhive.dashboard.R;
public class ExpandableListAdapter extends BaseExpandableListAdapter implements
Filterable {
private Context _context;
private List<String> _listDataHeader; // header titles
// child data in format of header title, child title
private HashMap<String, List<String>> _listDataChild;
public ExpandableListAdapter(Context context, List<String> listDataHeader,
HashMap<String, List<String>> listChildData) {
this._context = context;
this._listDataHeader = listDataHeader;
this._listDataChild = listChildData;
}
@Override
public Object getChild(int groupPosition, int childPosititon) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.get(childPosititon);
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public View getChildView(int groupPosition, final int childPosition,
boolean isLastChild, View convertView, ViewGroup parent) {
final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_item, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.lblListItem);
txtListChild.setText(childText);
return convertView;
}
@Override
public int getChildrenCount(int groupPosition) {
return this._listDataChild.get(this._listDataHeader.get(groupPosition))
.size();
}
@Override
public Object getGroup(int groupPosition) {
return this._listDataHeader.get(groupPosition);
}
@Override
public int getGroupCount() {
return this._listDataHeader.size();
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded,
View convertView, ViewGroup parent) {
String headerTitle = (String) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this._context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_group, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.lblListHeader);
lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle);
return convertView;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
@Override
public Filter getFilter() {
// TODO Auto-generated method stub
return null;
}
}
EDITTEXT에 키워드를 제공 할 때 내가 울부 짖는 오류를 얻고있다.
12-09 03:37:48.080: E/InputEventSender(1139): Exception dispatching finished signal.
12-09 03:37:48.080: E/MessageQueue-JNI(1139): Exception in MessageQueue callback: handleReceiveCallback
12-09 03:37:48.161: E/MessageQueue-JNI(1139): java.lang.NullPointerException
기능을 추가하기 위해 필요한 변경 사항을 알려주십시오.
ExpandableListAdapter.java에서 변경해야합니까? –