Question

我怎么能做到这一点？
我可以将适配器和片段分开，还是一切都必须在片段中？

我需要你的帮助谢谢

package info.androidhive.slidingmenu;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.Locale;
import android.app.Activity;
import android.app.Fragment;
import android.app.SearchManager;
import android.content.Context;
import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.SearchView;
import android.widget.TextView;

public class myfragment extends Fragment implements 
SearchView.OnQueryTextListener, SearchView.OnCloseListener {

private SearchView search; 
private MyListAdapter listAdapter; 
private ExpandableListView myList; 
private ArrayList<Continent> continentList = new ArrayList<Continent>(); 

/*
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.main, null);
ExpandableListView elv = (ExpandableListView) v.findViewById(R.id.expandableList);
elv.setAdapter(new MyListAdapter(getActivity(), continentList));
SearchManager searchManager = (SearchManager) getActivity().getSystemService(Context.SEARCH_SERVICE); 
search = (SearchView) getActivity().findViewById(R.id.search); 
search.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName())); 
search.setIconifiedByDefault(false); 
search.setOnQueryTextListener(this); 
search.setOnCloseListener(this); 
loadSomeData();
return v;
}

*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) { 
//super.onCreate(savedInstanceState); 



getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
View v = inflater.inflate(R.layout.main,null);
//getActivity().setContentView(R.layout.main); 
SearchManager searchManager = (SearchManager) getActivity().getSystemService(getActivity().SEARCH_SERVICE); 
search = (SearchView) getActivity().findViewById(R.id.search); 
search.setSearchableInfo(searchManager.getSearchableInfo(getActivity().getComponentName())); 
search.setIconifiedByDefault(false); 
search.setOnQueryTextListener(this); 
search.setOnCloseListener(this); 
//display the list 
displayList(); 
//expand all Groups 
expandAll(); 
return v;
} 



public boolean onCreateOptionsMenu(Menu menu) { 
getActivity().getMenuInflater().inflate(R.menu.main, menu); 
return true; 
} 
//method to expand all groups 
private void expandAll() { 
int count = listAdapter.getGroupCount(); 
for (int i = 0; i < count; i++){ 
myList.expandGroup(i); 
} 
} 
//method to expand all groups 
private void displayList() { 
//display the list 
loadSomeData(); 
//get reference to the ExpandableListView 
myList = (ExpandableListView) getActivity().findViewById(R.id.expandableList); 
//create the adapter by passing your ArrayList data 
listAdapter = new MyListAdapter(getActivity(), continentList); 
//attach the adapter to the list 
myList.setAdapter(listAdapter); 

//myList.setOnChildClickListener(myListItemClicked); 



/*myList.setOnChildClickListener(new OnChildClickListener() {

    public boolean onChildClick(ExpandableListView parent, View v,
            int groupPosition, int childPosition, long id) {
        final Country country = (Country) getChild(groupPosition, childPosition); 

        String product = country.getName();
        //Toast.makeText(context, product, Toast.LENGTH_SHORT).show();



      Intent i = new Intent(getApplicationContext(), SingleListItem.class);
      //.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
      i.putExtra("product", product );

      //i.putExtra("imv", R.id.option_icon); 
      startActivity(i);
    return true;
    }
    });*/
}

private void loadSomeData() { 
ArrayList<Country> countryList = new ArrayList<Country>(); 
Country country = new Country("1","heter",1,"im1"); 
countryList.add(country); 
country = new Country("2","bor",2,"im2"); 
countryList.add(country); 
country = new Country("3","snakker",3,"im3"); 
countryList.add(country); 
Continent continent = new Continent("Side 1",countryList); 
continentList.add(continent); 
countryList = new ArrayList<Country>(); 
country = new Country("4","skriver",4,"im4"); 
countryList.add(country); 
country = new Country("5","leser",5,"im5"); 
countryList.add(country); 
country = new Country("6","regner",6,"im6"); 
countryList.add(country); 
continent = new Continent("Side 2",countryList); 
continentList.add(continent); 
} 
@Override
public boolean onClose() { 
listAdapter.filterData(""); 
expandAll(); 
return false; 
} 
@Override
public boolean onQueryTextChange(String query) { 
listAdapter.filterData(query); 
expandAll(); 
return false; 
} 
@Override
public boolean onQueryTextSubmit(String query) { 
listAdapter.filterData(query); 
expandAll(); 
return false; 
}

public Object getChild(int groupPosition, int childPosition) { 
ArrayList<Country> countryList = continentList.get(groupPosition).getCountryList(); 
return countryList.get(childPosition); 
} 

public class MyListAdapter extends BaseExpandableListAdapter { 




    Context context =  getActivity().getApplicationContext(); 
    private ArrayList<Continent> continentList; 
    private ArrayList<Continent> originalList; 

    public MyListAdapter(Context context, ArrayList<Continent> continentList) { 
    this.context = context; 
    this.continentList = new ArrayList<Continent>(); 
    this.continentList.addAll(continentList); 
    this.originalList = new ArrayList<Continent>(); 
    this.originalList.addAll(continentList); 


    } 



    @Override
    public Object getChild(int groupPosition, int childPosition) { 
    ArrayList<Country> countryList = continentList.get(groupPosition).getCountryList(); 
    return countryList.get(childPosition); 
    } 
    @Override
    public long getChildId(int groupPosition, int childPosition) { 
    return childPosition; 
    } 
    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, 
    View view, ViewGroup parent) { 
    final Country country = (Country) getChild(groupPosition, childPosition); 
    if (view == null) { 
    LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    view = layoutInflater.inflate(R.layout.child_row, null); 
    } 
    TextView code = (TextView) view.findViewById(R.id.code); 
    TextView name = (TextView) view.findViewById(R.id.name); 
    TextView population = (TextView) view.findViewById(R.id.population); 
    ImageView image=(ImageView) view.findViewById(R.id.imageView1);
    code.setText(country.getCode().trim()); 
    name.setText(country.getName().trim()); 
    population.setText(NumberFormat.getNumberInstance(Locale.US).format(country.getPopulation())); 

    image.setImageResource(context.getResources().getIdentifier("info.androidhive.slidingmenu:drawable/"+country.getimag(),null,null));

    /*view.setOnClickListener(new OnClickListener() {
        @Override
        public void onClick(View v) {
            String product = country.getName();
            //Toast.makeText(context, product, Toast.LENGTH_SHORT).show();



          Intent i = new Intent(context.getApplicationContext(), SingleListItem.class);
          //.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)
          i.putExtra("product", product );

          //i.putExtra("imv", R.id.option_icon); 
          context.startActivity(i);
        }
      });
    */
    return view; 
    } 

    @Override
    public int getChildrenCount(int groupPosition) { 
    ArrayList<Country> countryList = continentList.get(groupPosition).getCountryList(); 
    return countryList.size(); 
    } 
    @Override
    public Object getGroup(int groupPosition) { 
    return continentList.get(groupPosition); 
    } 
    @Override
    public int getGroupCount() { 
    return continentList.size(); 
    } 
    @Override
    public long getGroupId(int groupPosition) { 
    return groupPosition; 
    } 
    @Override
    public View getGroupView(int groupPosition, boolean isLastChild, View view, 
    ViewGroup parent) { 
    Continent continent = (Continent) getGroup(groupPosition); 
    if (view == null) { 
    LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    view = layoutInflater.inflate(R.layout.group_row, null); 
    } 
    TextView heading = (TextView) view.findViewById(R.id.heading); 
    heading.setText(continent.getName().trim()); 
    return view; 
    } 
    @Override
    public boolean hasStableIds() { 
    return true; 
    } 
    @Override
    public boolean isChildSelectable(int groupPosition, int childPosition) { 
    return true; 
    } 
    public void filterData(String query){ 
    query = query.toLowerCase(); 
    Log.v("MyListAdapter", String.valueOf(continentList.size())); 
    continentList.clear(); 
    if(query.isEmpty()){ 
    continentList.addAll(originalList); 
    } 
    else { 
    for(Continent continent: originalList){ 
    ArrayList<Country> countryList = continent.getCountryList(); 
    ArrayList<Country> newList = new ArrayList<Country>(); 
    for(Country country: countryList){ 
    if(country.getCode().toLowerCase().contains(query) || 
    country.getName().toLowerCase().contains(query)){ 
    newList.add(country); 
    } 
    } 
    if(newList.size() > 0){ 
    Continent nContinent = new Continent(continent.getName(),newList); 
    continentList.add(nContinent); 
    } 
    } 
    } 
    Log.v("MyListAdapter", String.valueOf(continentList.size())); 
    notifyDataSetChanged(); `enter code here`
    } 

   }
 }

Answer 1

how i can make that work ?

请说明代码中的问题是什么？

i can separate the adapter and the fragment or everything must be in the fragment?

由您决定是将创建适配器分开还是将其保存在同一个片段中。无论是为适配器类创建单独的文件还是仅将其保存到java文件中，这都没有任何区别。

您只需要将数据绑定到与ExpandableListView内的ListView相同的Fragment。

它是如何工作的片段可扩展

1 个答案: