ナビゲーションドロワーの[Expandable listview]の例またはC＃コードを入力してください。 私はXamarin StudioでXamarin.Androidを使用しています。xamarin androidを使用してナビゲーションドロワーで拡張可能なリストビューを作成する方法
私はこのように次の図のように作成します。
navigation drawer with expandable listview
私は、Javaコードに慣れていないんです。おかげさまで
私はヘッダ項目にもアイコンがあるコードサンプルを作成しました。私が持っているMainActivity.csで
：
using Android.App;
using Android.Widget;
using Android.OS;
using Android.Support.V7.App;
using Toolbar = Android.Support.V7.Widget.Toolbar;
using Android.Support.Design.Widget;
using System;
using Android.Support.V4.Widget;
using System.Collections.Generic;
using Android.Views;
namespace NavigationDrawer_ExpandableListView
{
[Activity(Label = "NavigationDrawer_ExpandableListView", MainLauncher = true, Icon = "@drawable/icon", Theme = "@style/MyTheme")]
public class MainActivity : AppCompatActivity
{
private DrawerLayout drawerLayout;
ExpandableListAdapter menuAdapter;
ExpandableListView expandableList;
List<ExpandedMenuModel> listDataHeader;
Dictionary<ExpandedMenuModel, List<String>> listDataChild;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView (Resource.Layout.Main);
var toolbar = FindViewById<Toolbar>(Resource.Id.toolbar);
//Toolbar will now take on default actionbar characteristics
SetSupportActionBar(toolbar);
SupportActionBar.Title = "Hello from Appcompat Toolbar";
ExpandableListView expandableList = FindViewById<ExpandableListView>(Resource.Id.navigationmenu);
NavigationView navigationView = FindViewById<NavigationView>(Resource.Id.nav_view);
if (navigationView != null)
{
navigationView.NavigationItemSelected += OnNavigationItemSelected;
}
PrepareListData();
menuAdapter = new ExpandableListAdapter(this, listDataHeader, listDataChild, expandableList);
// setting list adapter
expandableList.SetAdapter(menuAdapter);
}
private void PrepareListData()
{
listDataHeader = new List<ExpandedMenuModel>();
listDataChild = new Dictionary<ExpandedMenuModel, List<String>>();
ExpandedMenuModel item1 = new ExpandedMenuModel();
item1.Name = "heading1";
item1.Image = Resource.Drawable.abc_ic_menu_copy_mtrl_am_alpha;
// Adding data header
listDataHeader.Add(item1);
ExpandedMenuModel item2 = new ExpandedMenuModel();
item2.Name = "heading2";
item2.Image = Resource.Drawable.abc_ic_voice_search_api_material;
listDataHeader.Add(item2);
ExpandedMenuModel item3 = new ExpandedMenuModel();
item3.Name = "heading3";
item3.Image = Resource.Drawable.abc_ic_menu_share_mtrl_alpha;
listDataHeader.Add(item3);
ExpandedMenuModel item4 = new ExpandedMenuModel();
item4.Name = "heading4";
item4.Image = Resource.Drawable.abc_ic_menu_paste_mtrl_am_alpha;
listDataHeader.Add(item4);
// Adding child data
List<String> heading1 = new List<String>();
heading1.Add("Submenu of item 1");
List<String> heading2 = new List<String>();
heading2.Add("Submenu of item 2");
heading2.Add("Submenu of item 2");
heading2.Add("Submenu of item 2");
List<String> heading3 = new List<String>();
heading3.Add("Submenu of item 3");
heading3.Add("Submenu of item 3");
List<String> heading4 = new List<String>();
heading4.Add("Submenu of item 4");
heading4.Add("Submenu of item 4");
listDataChild.Add(listDataHeader[0], heading1);// Header, Child data
listDataChild.Add(listDataHeader[1], heading2);
listDataChild.Add(listDataHeader[2], heading3);
listDataChild.Add(listDataHeader[3], heading4);
}
public override bool OnOptionsItemSelected(IMenuItem item)
{
switch (item.ItemId)
{
case Android.Resource.Id.Home:
drawerLayout.OpenDrawer(Android.Support.V4.View.GravityCompat.Start);
return true;
}
return base.OnOptionsItemSelected(item);
}
private void OnNavigationItemSelected(object sender, NavigationView.NavigationItemSelectedEventArgs e)
{
var menuItem = e.MenuItem;
menuItem.SetChecked(!menuItem.IsChecked);
drawerLayout.CloseDrawers();
}
}
}
ExpandableListAdapter.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Java.Lang;
namespace NavigationDrawer_ExpandableListView
{
class ExpandableListAdapter : BaseExpandableListAdapter
{
private Activity _context;
private List<ExpandedMenuModel> _listDataHeader; // header titles
// child data in format of header title, child title
private Dictionary<ExpandedMenuModel, List<string>> _listDataChild;
ExpandableListView expandList;
public ExpandableListAdapter(Activity context, List<ExpandedMenuModel> listDataHeader, Dictionary<ExpandedMenuModel, List<string>> listChildData, ExpandableListView mView)
{
_context = context;
_listDataHeader = listDataHeader;
_listDataChild = listChildData;
expandList = mView;
}
public override int GroupCount
{
get
{
return _listDataHeader.Count;
}
}
public override bool HasStableIds
{
get
{
return false;
}
}
public override Java.Lang.Object GetChild(int groupPosition, int childPosition)
{
return _listDataChild[_listDataHeader[groupPosition]][childPosition];
}
public override long GetChildId(int groupPosition, int childPosition)
{
return childPosition;
}
public override int GetChildrenCount(int groupPosition)
{
int childCount = _listDataChild[_listDataHeader[groupPosition]].Count;
return childCount;
}
public override View GetChildView(int groupPosition, int childPosition, bool isLastChild, View convertView, ViewGroup parent)
{
string childText = (string)GetChild(groupPosition, childPosition);
if (convertView == null)
{
convertView = _context.LayoutInflater.Inflate(Resource.Layout.list_submenu, null);
}
TextView txtListChild = (TextView)convertView.FindViewById(Resource.Id.submenu);
txtListChild.Text = childText;
return convertView;
}
public override Java.Lang.Object GetGroup(int groupPosition)
{
return new JavaObjectWrapper<ExpandedMenuModel>() { Obj = _listDataHeader[groupPosition] };
}
public override long GetGroupId(int groupPosition)
{
return groupPosition;
}
public override View GetGroupView(int groupPosition, bool isExpanded, View convertView, ViewGroup parent)
{
ExpandedMenuModel headerTitle = _listDataHeader[groupPosition];
convertView = convertView ?? _context.LayoutInflater.Inflate(Resource.Layout.list_header, null);
TextView lblListHeader = (TextView)convertView.FindViewById(Resource.Id.submenu);
ImageView headerIcon = (ImageView)convertView.FindViewById(Resource.Id.iconimage);
lblListHeader.Text = headerTitle.Name;
headerIcon.SetImageResource(headerTitle.Image);
return convertView;
}
public override bool IsChildSelectable(int groupPosition, int childPosition)
{
return true;
}
public class JavaObjectWrapper<T> : Java.Lang.Object
{
public T Obj { get; set; }
}
}
}
ExpandedMenuModel.cs（あなたは単なる文字列を使用することができない場合は、ヘッダ上のアイコンを使用する場合モデルの代わりにリスト）
namespace NavigationDrawer_ExpandableListView
{
public class ExpandedMenuModel
{
public ExpandedMenuModel()
{
}
public string Name { get; set; }
public int Image { get; set; }
}
}
Main.axml（基本的には、モデルの代わりにExpandableListView IDE NavigationView）
<?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"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true">
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/actionBarSize"
android:background="?attr/colorPrimary"
app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"
app:popupTheme="@style/ThemeOverlay.AppCompat.Dark" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
</LinearLayout>
<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">
<ExpandableListView
android:id="@+id/navigationmenu"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@android:color/white"
android:layout_marginTop="192dp">
</ExpandableListView>
</android.support.design.widget.NavigationView>
</android.support.v4.widget.DrawerLayout>
list_header.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="2dp"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginLeft="20dp"
android:orientation="horizontal">
<ImageView
android:id="@+id/iconimage"
android:layout_width="50dp"
android:layout_height="50dp"
android:paddingBottom="10dp"
android:paddingLeft="10dp"
android:paddingTop="10dp"/>
<TextView
android:id="@+id/submenu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp"
android:textColor="#000000"
android:textSize="20sp"/>
</LinearLayout>
</LinearLayout>
list_submenu.xmlここ
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/submenu"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginLeft="20dp"
android:padding="10dp"
android:textColor="#000000"
android:textSize="18sp"/>
</LinearLayout>
は、それがどのように見えるかです：
GitHubからプロジェクトをダウンロードすることもできます：https://github.com/Florin-Birgu/NavigationDrawer-ExpandableListView-Xamarin.Android