Özel Adaptör'ü kullanarak Genişletilebilir Liste Görünümü

Question

Bir ImageView ve 2 TextViews içeren Genişletilebilir ListView için özel bir adaptör uygulamak istiyorum. Basit Genişletilebilir ListView'i Array Adapter ile başarıyla uyguladım. İstenen Özel Düzenlemeyi uygulamak için aşağıdaki iki sınıfta (birinci sınıf Bağdaştırıcı sınıfı ve ikincisi Genişletilebilir Liste Görünümü'nü görüntülemek için Etkinlik) ne yapılmalıdır?

Aşağıda

Adaptör Sınıf geçerli: Aşağıda değiştirilmesi gerekir sınıflardır

package com.example.travelplanner; 

import java.util.List; 
import java.util.Map; 

import android.R.string; 
import android.app.Activity; 
import android.content.Context; 
import android.content.Intent; 
import android.sax.StartElementListener; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.BaseExpandableListAdapter; 
import android.widget.Button; 
import android.widget.ExpandableListView; 
import android.widget.TextView; 

public class ExpandableListAdapter extends BaseExpandableListAdapter implements OnClickListener{ 

    private Activity context; 
    private Map<String, List<String>> itemcollections; 
    private List<String> item; 
    TextView childtv; 
    Button btn_cat_explore; 
    public ExpandableListAdapter(Activity context, List<String> item_names, Map<String, List<String>> collections){ 
     this.context = context; 
     this.item = item_names; 
     this.itemcollections = collections; 
    } 
    @Override 
    public Object getChild(int groupposition, int childposition) { 
     // TODO Auto-generated method stub 
     return itemcollections.get(item.get(groupposition)).get(childposition); 
    } 

    @Override 
    public long getChildId(int groupposition, int childposition) { 
     // TODO Auto-generated method stub 
     return childposition; 
    } 

    @Override 
    public View getChildView(int groupposition, int childpostion, boolean isLastchild, View convertview, 
      ViewGroup parent) { 
     // TODO Auto-generated method stub 
     final String childitem = (String) getChild(groupposition, childpostion); 
     LayoutInflater inflater = context.getLayoutInflater(); 
     if(convertview==null){ 
      convertview = inflater.inflate(R.layout.child_item, null); 
     } 
     childtv = (TextView)convertview.findViewById(R.id.child_text); 
     childtv.setText(childitem); 
     return convertview; 
    } 

    @Override 
    public int getChildrenCount(int groupposition) { 
     // TODO Auto-generated method stub 
     return itemcollections.get(item.get(groupposition)).size(); 
    } 

    @Override 
    public Object getGroup(int groupPosition) { 
     // TODO Auto-generated method stub 
     return item.get(groupPosition); 
    } 

    @Override 
    public int getGroupCount() { 
     // TODO Auto-generated method stub 
     return item.size(); 
    } 

    @Override 
    public long getGroupId(int groupPosition) { 
     // TODO Auto-generated method stub 
     return groupPosition; 
    } 

    @Override 
    public View getGroupView(int groupPosition, boolean isExpanded, 
      View convertView, ViewGroup parent) { 
     // TODO Auto-generated method stub 
     String itemname = (String) getGroup(groupPosition); 
     if(convertView==null){ 
      LayoutInflater groupinflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
      convertView = groupinflater.inflate(R.layout.group_item, null); 
     } 
     return convertView; 
    } 

    @Override 
    public boolean hasStableIds() { 
     // TODO Auto-generated method stub 
     return false; 
    } 

    @Override 
    public boolean isChildSelectable(int groupPosition, int childPosition) { 
     // TODO Auto-generated method stub 
     return false; 
    } 
    @Override 
    public void onClick(View v) { 
     // TODO Auto-generated method stub 

    } 

} 

Aşağıda benim TourCatActivity.java geçerli:

İşte

package com.example.travelplanner; 

import java.util.ArrayList; 
import java.util.LinkedHashMap; 
import java.util.List; 
import java.util.Map; 

import android.os.Bundle; 
import android.app.Activity; 
import android.view.Menu; 
import android.view.View; 
import android.widget.ExpandableListView; 
import android.widget.ExpandableListView.OnChildClickListener; 
import android.widget.TabHost; 
import android.widget.TabHost.TabSpec; 

public class TourCatActivity extends Activity { 

    List<String> groupList; 
    List<String> childList; 
    Map<String, List<String>> catcollection; 
    ExpandableListView expListView; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_tour_cat); 
     //Tab view 
     TabHost tabHost=(TabHost)findViewById(R.id.tabhost); 
     tabHost.setup(); 

     TabSpec spec1=tabHost.newTabSpec("Tab 1"); 
     spec1.setContent(R.id.tab1); 
     spec1.setIndicator("Category"); 

     TabSpec spec2=tabHost.newTabSpec("Theme"); 
     spec2.setIndicator("Theme tours"); 
     spec2.setContent(R.id.tab2); 

     tabHost.addTab(spec1); 
     tabHost.addTab(spec2); 

     createGroupList(); 

     createCollection(); 
     expListView = (ExpandableListView) findViewById(R.id.expandableListView1); 
     final ExpandableListAdapter expListAdapter = new ExpandableListAdapter(
       this, groupList, catcollection); 
     expListView.setAdapter(expListAdapter); 
     expListView.setOnChildClickListener(new OnChildClickListener() { 

      @Override 
      public boolean onChildClick(ExpandableListView parent, View v, 
        int groupPosition, int childPosition, long id) { 
       // TODO Auto-generated method stub 
       return false; 
      } 
     }); 
    } 
     private void createGroupList() { 
      groupList = new ArrayList<String>(); 
      groupList.add("Rajasthan"); 
      groupList.add("Golden Triangle"); 
      groupList.add("Luxury Trains"); 
      groupList.add("Heritage Tours"); 
      groupList.add("Cultural Tours"); 
      groupList.add("Beyond India Tours"); 
     } 

     private void createCollection() { 
      // preparing category collection(child) 
      String[] hpModels = { "HP Pavilion G6-2014TX", "ProBook HP 4540", 
        "HP Envy 4-1025TX" }; 
      String[] hclModels = { "HCL S2101", "HCL L2102", "HCL V2002" }; 
      String[] lenovoModels = { "IdeaPad Z Series", "Essential G Series", 
        "ThinkPad X Series", "Ideapad Z Series" }; 
      String[] sonyModels = { "VAIO E Series", "VAIO Z Series", 
        "VAIO S Series", "VAIO YB Series" }; 
      String[] dellModels = { "Inspiron", "Vostro", "XPS" }; 
      String[] samsungModels = { "NP Series", "Series 5", "SF Series" }; 

      catcollection = new LinkedHashMap<String, List<String>>(); 

      for (String laptop : groupList) { 
       if (laptop.equals("HP")) { 
        loadChild(hpModels); 
       } else if (laptop.equals("Dell")) 
        loadChild(dellModels); 
       else if (laptop.equals("Sony")) 
        loadChild(sonyModels); 
       else if (laptop.equals("HCL")) 
        loadChild(hclModels); 
       else if (laptop.equals("Samsung")) 
        loadChild(samsungModels); 
       else 
        loadChild(lenovoModels); 

       catcollection.put(laptop, childList); 
      } 
     } 

     private void loadChild(String[] laptopModels) { 
      childList = new ArrayList<String>(); 
      for (String model : laptopModels) 
       childList.add(model); 
     } 
    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.tour_cat, menu); 
     return true; 
    } 

} 

Answer 1

Özelleştirme ile Expandable ListView en iyi örneğidir. Herhangi bir zorluk durumunda bana bildirin. ExpandableBaseAdapter derinlemesine bakmak için ihtiyacınız olan şeydir.