Android - 如何在 Android 的 Expandable ListView 的子视图下添加另一个视图？

Posted 2023-05-07

【中文标题】Android - 如何在 Android 的 Expandable ListView 的子视图下添加另一个视图？

【英文标题】：Android - How to add Another view under a childview in Expandable ListView in Android?

【发布时间】：2013-09-20 03:49:59

【问题描述】：

我正在开发一个使用 Expandable ListView 的 android 应用程序。

Activity A有以下sn-ps，

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ExpandableListView.OnGroupClickListener;
import android.widget.ExpandableListView.OnGroupCollapseListener;
import android.widget.ExpandableListView.OnGroupExpandListener;
import android.widget.Toast;

public class A extends Activity 

    ExpandableListAdapter listAdapter;
    ExpandableListView expListView;
    List<String> listDataHeader;
    HashMap<String, List<String>> listDataChild;

    @Override
    protected void onCreate(Bundle savedInstanceState) 

        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);

        super.onCreate(savedInstanceState);
        setContentView(R.layout.bussinessproductmanagement);
        getWindow().setWindowAnimations(0);
        // get the listview
        expListView = (ExpandableListView) findViewById(R.id.list);
        expListView.setGroupIndicator(null);
        expListView.setSelector(R.drawable.clientprojecthover);
        // 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)  

                return false;
            
        );

        // Listview Group expanded listener
        expListView.setOnGroupExpandListener(new OnGroupExpandListener() 

            @Override
            public void onGroupExpand(int groupPosition) 

                int len = listAdapter.getGroupCount();
                for (int i = 0; i < len; i++) 
                    if (i != groupPosition) 
                        expListView.collapseGroup(i);
                    
                
            
        );

        // Listview Group collasped listener
        expListView.setOnGroupCollapseListener(new OnGroupCollapseListener() 

            @Override
            public void onGroupCollapse(int groupPosition) 
                Toast.makeText(getApplicationContext(),
                        listDataHeader.get(groupPosition) + " Collapsed",
                        Toast.LENGTH_SHORT).show();
            
        );

        // Listview on child click listener
        expListView.setOnChildClickListener(new OnChildClickListener() 

            @Override
            public boolean onChildClick(ExpandableListView parent, View v,
                    int groupPosition, int childPosition, long id) 
                // TODO Auto-generated method stub
                Toast.makeText(
                        getApplicationContext(),
                        listDataHeader.get(groupPosition)
                                + " : "
                                + listDataChild.get(
                                        listDataHeader.get(groupPosition)).get(
                                        childPosition), Toast.LENGTH_SHORT)
                        .show();

                return false;
            
        );
    

    /*
     * Preparing the list data
     */

    private void prepareListData() 
        listDataHeader = new ArrayList<String>();
    listDataChild = new HashMap<String, List<String>>();
    ArrayList<List<String>> childObjects=new ArrayList<List<String>>();

        for(int i=1;i<11;i++)
        
        listDataHeader.add("Client "+ i);
        List<String> childLists = new ArrayList<String>();

        for(int childCount=1;childCount<11;childCount++)
        
            childLists.add("Project "+childCount);
        

        childObjects.add(childLists);

        

        for(int j=0;j<listDataHeader.size();j++)
        
            listDataChild.put(listDataHeader.get(j), childObjects.get(j));
        
    
    

可扩展列表适配器类有以下sn-ps，

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.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;

public class ExpandableListAdapter extends BaseExpandableListAdapter 

private Context _context;
private List<String> _listDataHeader;
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);
    ImageView imgView=(ImageView)convertView.findViewById(R.id.indicator);

    lblListHeader.setTypeface(null, Typeface.BOLD);
    lblListHeader.setText(headerTitle);

    if(isExpanded)
    
        imgView.setImageResource(R.drawable.clientbuttonarrowt);
    
    else
    
        imgView.setImageResource(R.drawable.arrowrght);
    

    return convertView;


@Override
public boolean hasStableIds() 
    return false;


@Override
public boolean isChildSelectable(int groupPosition, int childPosition) 
    return true;

在这里，我可以获得带有行及其子项的 Expandable ListView。但我想在每个孩子下添加另一个视图。

【问题讨论】：

检查这个...这将有助于你...allappsdevelopers.com/…@Rakesh L

你有解决方案吗，上面的链接不起作用

【参考方案1】：

在您的可展开视图中添加其他视图作为页脚视图，如下所示

ExpandableListView list = getListView();
View headerView = View.inflate(this, R.layout.header, null);
list.addHeaderView(headerView);
View footerView = View.inflate(this, R.layout.footer, null);
list.addFooterView(footerView);

【讨论】：

这可以将页眉和页脚添加到列表视图，但我们如何添加到子级仅意味着所有子级都有一个共同视图

【参考方案2】：

这是我为解决问题所做的工作

public class MyExpandableAdapter extends BaseExpandableListAdapter 
Context context;
List<ParentObject> parentObjects;

public MyExpandableAdapter(Context context, List<ParentObject> parentObjects)

    this.context = context;
    this.parentObjects = parentObjects;

@Override
public int getGroupCount() 
    return parentObjects.size();


 //Add 2 to childcount. The first row and the last row are used as header and footer to childview
@Override
public int getChildrenCount(int i) 
    return parentObjects.get(i).childObjects.size() +2;


@Override
public ParentObject getGroup(int i) 
    return parentObjects.get(i);


@Override
public ChildObject getChild(int i, int i2) 
    return parentObjects.get(i).childObjects.get(i2);


@Override
public long getGroupId(int i) 
    return i;


@Override
public long getChildId(int i, int i2) 
    return 0;


@Override
public boolean hasStableIds() 
    return false;


@Override
public View getGroupView(int i, boolean b, View view, ViewGroup viewGroup)

    ParentObject currentParent = parentObjects.get(i);
    if(view ==null)
    
        LayoutInflater inflater =(LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        view = inflater.inflate(R.layout.parent_row,null);
    
    TextView txtMother = (TextView)view.findViewById(R.id.txtMother);
    TextView txtFather = (TextView)view.findViewById(R.id.txtFather);
    txtMother.setText(currentParent.mother);
    txtFather.setText(currentParent.father);
    return view;


@Override
public View getChildView(int groupPosition, int childPosition, boolean b, View view, ViewGroup viewGroup) 
    ParentObject currentParent = getGroup(groupPosition);
    LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    //the first row is used as header
    if(childPosition ==0)
    
        view = inflater.inflate(R.layout.child_header, null);
        TextView txtHeader = (TextView)view.findViewById(R.id.txtHeader);
        txtHeader.setText(currentParent.textToHeader);
    

    //Here is the ListView of the ChildView
    if(childPosition>0 && childPosition<getChildrenCount(groupPosition)-1)
    
        ChildObject currentChild = getChild(groupPosition,childPosition-1);
        view = inflater.inflate(R.layout.child_row,null);
        TextView txtChildName = (TextView)view.findViewById(R.id.txtChildName);
        TextView txtChildAge = (TextView)view.findViewById(R.id.txtChildAge);
        txtChildName.setText(currentChild.childName);
        txtChildAge.setText("Age: " + String.valueOf(currentChild.age));
    
    //the last row is used as footer
    if(childPosition == getChildrenCount(groupPosition)-1)
    
        view = inflater.inflate(R.layout.child_footer,null);
        TextView txtFooter = (TextView)view.findViewById(R.id.txtFooter);
        txtFooter.setText(currentParent.textToFooter);
    
    return view;


@Override
public boolean isChildSelectable(int i, int i2) 
    return false;

您可以在这里查看教程：http://robusttechhouse.com/how-to-add-header-footer-to-expandablelistview-childview/ 希望对您有所帮助！