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私はゼロの子を持つグループのインジケータを設定しません。拡張可能なリストビューを使用しました。これはスクリーンショットInitial layoutです。最初は0の子を持つグループはインジケータを持っていません。しかし、子どもがいないグループにも指標が表示され始めます。Expandable ListViewにゼロの子を持つグループのインジケータを設定しない方法は？
MainActivity.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:ads="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start">
<include
layout="@layout/app_bar_main"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.NavigationView
android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main"
android:clickable="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ExpandableListView
android:id="@+id/exp_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="160dp"
android:indicatorRight="?android:attr/expandableListPreferredItemIndicatorRight"
android:background="@android:color/white"
android:footerDividersEnabled="true"
android:groupIndicator="@null">
</ExpandableListView>
<!--<ListView-->
<!--android:background="@android:color/white"-->
<!--android:id="@+id/menuList"-->
<!--android:layout_width="match_parent"-->
<!--android:layout_height="match_parent"-->
<!--android:layout_marginTop="10dp" />-->
</LinearLayout>
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
Listheader.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="5dp"
android:orientation="horizontal">
<ImageView
android:id="@+id/iconimage"
android:layout_width="40dp"
android:layout_height="40dp"
android:padding="10dp"/>
<TextView
android:id="@+id/submenu"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="10dp"
android:textColor="#000000"
android:textSize="16sp"
android:gravity="center_vertical" />
</LinearLayout>
</LinearLayout>
ExpandableListAdapter.java
package com.global.market;
import android.content.Context;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseExpandableListAdapter;
import android.widget.ExpandableListView;
import android.widget.ImageView;
import android.widget.TextView;
import java.util.HashMap;
import java.util.List;
/**
* Created by Samarth on 17-Jul-16.
*/
public class ExpandableListAdapter extends BaseExpandableListAdapter {
private Context mContext;
private List<ExpandedMenuModel> mListDataHeader; // header titles
// child data in format of header title, child title
private HashMap<ExpandedMenuModel, List<String>> mListDataChild;
ExpandableListView expandList;
public ExpandableListAdapter(Context context, List<ExpandedMenuModel> listDataHeader,
HashMap<ExpandedMenuModel, List<String>> listChildData, ExpandableListView mView) {
this.mContext = context;
this.mListDataHeader = listDataHeader;
this.mListDataChild = listChildData;
this.expandList = mView;
}
@Override
public int getGroupCount() {
int i = mListDataHeader.size();
Log.d("GROUPCOUNT", String.valueOf(i));
return this.mListDataHeader.size();
}
@Override
public int getChildrenCount(int groupPosition) {
int childCount = 0;
if (groupPosition<2) {
childCount = this.mListDataChild.get(this.mListDataHeader.get(groupPosition))
.size();
}
return childCount;
}
@Override
public Object getGroup(int groupPosition) {
Log.d("Group",groupPosition+"");
return this.mListDataHeader.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
// Log.d("CHILD", mListDataChild.get(this.mListDataHeader.get(groupPosition))
// .get(childPosition).toString());
return this.mListDataChild.get(this.mListDataHeader.get(groupPosition))
.get(childPosition);
}
@Override
public long getGroupId(int groupPosition) {
return groupPosition;
}
@Override
public long getChildId(int groupPosition, int childPosition) {
return childPosition;
}
@Override
public boolean hasStableIds() {
return false;
}
@Override
public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
ExpandedMenuModel headerTitle = (ExpandedMenuModel) getGroup(groupPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this.mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.listheader, null);
}
TextView lblListHeader = (TextView) convertView
.findViewById(R.id.submenu);
ImageView headerIcon = (ImageView) convertView.findViewById(R.id.iconimage);
// lblListHeader.setTypeface(null, Typeface.BOLD);
lblListHeader.setText(headerTitle.getIconName());
headerIcon.setImageResource(headerTitle.getIconImg());
if (isExpanded && getChildrenCount(groupPosition)>0) {
lblListHeader.setCompoundDrawablesWithIntrinsicBounds(0, 0,
R.drawable.collapse, 0);
}
else if(getChildrenCount(groupPosition)>0){
// If group is not expanded then change the text back into normal
// and change the icon
lblListHeader.setCompoundDrawablesWithIntrinsicBounds(0, 0,
R.drawable.expand, 0);
}
return convertView;
}
@Override
public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
final String childText = (String) getChild(groupPosition, childPosition);
if (convertView == null) {
LayoutInflater infalInflater = (LayoutInflater) this.mContext
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = infalInflater.inflate(R.layout.list_submenu, null);
}
TextView txtListChild = (TextView) convertView
.findViewById(R.id.submenu);
txtListChild.setText(childText);
return convertView;
}
@Override
public boolean isChildSelectable(int groupPosition, int childPosition) {
return true;
}
}