我想在组没有 child 时隐藏组指示符我放下代码 我将自定义图像用于指示器可扩展 ListView 如果组没有 child 比指标隐藏如何隐藏这个
Home.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white" >
<RelativeLayout
android:id="@+id/header"
android:layout_height="wrap_content"
android:layout_width="fill_parent"
android:layout_alignParentTop="true"
>
<ImageView
android:id="@+id/imagemenu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/menu"
android:layout_alignParentLeft="true"
/>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_toRightOf="@+id/imagemenu"
android:background="@color/ColorGray" >
<ImageView
android:id="@+id/imagemenu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/bridgelogo"
android:layout_alignParentLeft="true"
/>
</RelativeLayout>
</RelativeLayout>
<ExpandableListView
android:id="@+id/expandablelistview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="@+id/header"
android:layout_above="@+id/footer"
android:indicatorRight="45sp"
android:divider="@android:color/white"
android:dividerHeight="3sp"
android:childDivider="@android:color/white"
android:groupIndicator="@drawable/selector"
>
</ExpandableListView>
<ImageView
android:id="@+id/footer"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="@drawable/footer"
android:layout_alignParentBottom="true"
/>
</RelativeLayout>
Selector.xml
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/empty" android:state_empty="true"/>
<item android:drawable="@drawable/expand" android:state_expanded="true"/>
<item android:drawable="@drawable/empty"></item>
</selector>
HomeListActivity.java
package com.bridge.app;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONObject;
import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.webkit.WebView;
import android.widget.ExpandableListView;
import android.widget.Toast;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ExpandableListView.OnGroupClickListener;
import android.widget.ExpandableListView.OnGroupCollapseListener;
import android.widget.ExpandableListView.OnGroupExpandListener;
public class HomeListActivity extends Activity
{
WebView webview;
ExpandableListAdapter listAdapter;
ExpandableListView expListView;
ArrayList<HashMap<String,String>> headerarraylist;
ArrayList<HashMap<String,String>> childarraylist;
List<String> listDataHeader;
HashMap<String, List<String>> listDataChild;
List<String> submenu0 = new ArrayList<String>();
List<String> submenu1 = new ArrayList<String>();
List<String> submenu2 = new ArrayList<String>();
List<String> submenu3 = new ArrayList<String>();
List<String> submenu4 = new ArrayList<String>();
List<String> submenu5 = new ArrayList<String>();
List<String> submenu6 = new ArrayList<String>();
List<String> submenu7 = new ArrayList<String>();
List<String> submenu8 = new ArrayList<String>();
List<String> submenu9 = new ArrayList<String>();
List<String> submenu10 = new ArrayList<String>();
List<String> submenu11= new ArrayList<String>();
List<String> submenu12= new ArrayList<String>();
List<String> submenu13= new ArrayList<String>();
int lastExpandedGroupPosition = 0;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_homelist);
expListView = (ExpandableListView) findViewById(R.id.expandablelistview);
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
headerarraylist=new ArrayList<HashMap<String,String>>();
childarraylist=new ArrayList<HashMap<String,String>>();
expListView.setGroupIndicator(null);
// 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)
{
if (groupPosition != lastExpandedGroupPosition)
{
expListView.collapseGroup(lastExpandedGroupPosition);
}
lastExpandedGroupPosition = groupPosition;
Toast.makeText(getApplicationContext(),listDataHeader.get(groupPosition) + " Expanded", Toast.LENGTH_SHORT).show();
}
});
// 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)
{
Toast.makeText(getApplicationContext(),listDataHeader.get(groupPosition)+ " : " + listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition), Toast.LENGTH_SHORT).show();
String child=listDataChild.get(listDataHeader.get(groupPosition)).get(childPosition);
for(int i=0;i<childarraylist.size();i++)
{
String uid=childarraylist.get(i).get(ClassVariable.SUBMENU.UID).toString();
String title=childarraylist.get(i).get(ClassVariable.SUBMENU.TITLE).toString();
String pid=childarraylist.get(i).get(ClassVariable.SUBMENU.PID).toString();
if(child.equalsIgnoreCase(title))
{
Intent intent = new Intent(HomeListActivity.this,HomeListClickActivity.class);
intent.putExtra("title", title);
intent.putExtra("uid", uid);
intent.putExtra("pid", pid);
startActivity(intent);
Log.e("Child Value uid","--------->"+uid);
Log.e("Child Value pid ","--------->"+pid);
Log.e("Child Value title","--------->"+title);
}
}
Log.e("Child Value","--------->"+child);
return false;
}
});
if (CheckConnection.getInstance(HomeListActivity.this).isOnline(HomeListActivity.this))
{
new HomeListAsynctask().execute("");
}
else
{
}
}
// Asynctask for getting the home data from url
public class HomeListAsynctask extends AsyncTask<String, List<String>,String>
{
String detail;
@Override
protected void onPreExecute()
{
}
@Override
protected String doInBackground(String... params)
{
try
{
JsonParser jparser = new JsonParser();
String menuurl="http://www.bridge.co.at/webservices/services.php?method=menu";
String menudata=jparser.getdata(menuurl);
JSONObject jobject = new JSONObject(menudata);
JSONArray jarray =jobject.getJSONArray(ClassVariable.MENU.MENU);
listDataHeader.clear();
for(int i=0;i<jarray.length();i++)
{
listDataHeader.add(jarray.getJSONObject(i).get(ClassVariable.MENU.TITLE).toString());
// For Getting Main Menu in ArrayList
String title=jarray.getJSONObject(i).get(ClassVariable.MENU.TITLE).toString();
String uid=jarray.getJSONObject(i).get(ClassVariable.MENU.UID).toString();
String pid=jarray.getJSONObject(i).get(ClassVariable.MENU.PID).toString();
HashMap<String,String> map = new HashMap<String, String>();
map.put(ClassVariable.MENU.TITLE, title);
map.put(ClassVariable.MENU.UID, uid);
map.put(ClassVariable.MENU.PID, pid);
headerarraylist.add(map);
// For Getting SubMenu in ArrayList
String submenuurl="http://www.bridge.co.at/webservices/services.php?method=submenu&uid="+uid;
String submenudata=jparser.getdata(submenuurl);
JSONObject jobjectsubmenu = new JSONObject(submenudata);
JSONArray jarraysubmenu =jobjectsubmenu.getJSONArray(ClassVariable.SUBMENU.SUBMENU);
for(int j=0;j<jarraysubmenu.length();j++)
{
String submenutitle=jarraysubmenu.getJSONObject(j).get(ClassVariable.SUBMENU.TITLE).toString();
String submenuuid=jarraysubmenu.getJSONObject(j).get(ClassVariable.SUBMENU.UID).toString();
String submenupid=jarraysubmenu.getJSONObject(j).get(ClassVariable.SUBMENU.PID).toString();
if(i==0)
{
submenu0.add(submenutitle);
}
if(i==1)
{
submenu1.add(submenutitle);
}
if(i==2)
{
submenu2.add(submenutitle);
}
if(i==3)
{
submenu3.add(submenutitle);
}
if(i==4)
{
submenu4.add(submenutitle);
}
if(i==5)
{
submenu5.add(submenutitle);
}
if(i==6)
{
submenu6.add(submenutitle);
}
if(i==7)
{
submenu7.add(submenutitle);
}
if(i==8)
{
submenu8.add(submenutitle);
}
if(i==9)
{
submenu9.add(submenutitle);
}
if(i==10)
{
submenu10.add(submenutitle);
}
if(i==11)
{
submenu11.add(submenutitle);
}
if(i==12)
{
submenu12.add(submenutitle);
}
HashMap<String,String> map1 = new HashMap<String, String>();
map1.put(ClassVariable.SUBMENU.TITLE, submenutitle);
map1.put(ClassVariable.SUBMENU.UID, submenuuid);
map1.put(ClassVariable.SUBMENU.PID, submenupid);
childarraylist.add(map1);
}
}
Log.e("Child Array List","----->"+childarraylist);
listDataChild.put(listDataHeader.get(0), submenu0); // Header, Child data
listDataChild.put(listDataHeader.get(1), submenu1);
listDataChild.put(listDataHeader.get(2), submenu2);
listDataChild.put(listDataHeader.get(3), submenu3); // Header, Child data
listDataChild.put(listDataHeader.get(4), submenu4);
listDataChild.put(listDataHeader.get(5), submenu5);
listDataChild.put(listDataHeader.get(6), submenu6); // Header, Child data
listDataChild.put(listDataHeader.get(7), submenu7);
listDataChild.put(listDataHeader.get(8), submenu8);
listDataChild.put(listDataHeader.get(9), submenu9); // Header, Child data
listDataChild.put(listDataHeader.get(10), submenu10);
listDataChild.put(listDataHeader.get(11), submenu11);
listDataChild.put(listDataHeader.get(12), submenu12); // Header, Child data
Log.e("HeaderList","---->"+listDataHeader);
Log.e("ChildList","---->"+listDataHeader);
}
catch (Exception e)
{
e.printStackTrace();
}
return detail;
}
@Override
protected void onPostExecute(String result)
{
listAdapter = new ExpandableListAdapter(HomeListActivity.this, listDataHeader, listDataChild);
expListView.setAdapter(listAdapter);
}
}
}
Expandable List Adapter.java
package com.bridge.app;
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.webkit.WebView.FindListener;
import android.widget.BaseExpandableListAdapter;
import android.widget.ImageView;
import android.widget.TextView;
public class ExpandableListAdapter extends BaseExpandableListAdapter
{
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;
}
}
最佳答案
定义您的自定义状态并将它们设置在正确的代码位置。
关于android - 当组在可扩展 ListView 中没有子项时隐藏组的指示器？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21495005/