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jeremejazz/Chemical.cs

Forked from Cheesebaron/Chemical.cs
Created October 8, 2016 13:04
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Revisions

  1. @Cheesebaron Cheesebaron revised this gist Mar 30, 2014. 4 changed files with 118 additions and 122 deletions.
    4 changes: 3 additions & 1 deletion Chemical.cs
    View file
    Original file line number Diff line number Diff line change
    @@ -1,7 +1,9 @@
    namespace SearchViewSample
    {
    public class Chemical : Java.Lang.Object
    public class Chemical
    {
    public string Name { get; set; }

    public int DrawableId { get; set; }
    }
    }
    77 changes: 23 additions & 54 deletions ChemicalsAdapter.cs
    View file
    Original file line number Diff line number Diff line change
    @@ -1,5 +1,4 @@
    using System.Collections.Generic;
    using System.Globalization;
    using System.Linq;
    using Android.App;
    using Android.Views;
    @@ -9,58 +8,35 @@

    namespace SearchViewSample
    {
    public class ChemicalsAdapter : BaseAdapter<Chemical>, ISectionIndexer, IFilterable
    public class ChemicalsAdapter : BaseAdapter<Chemical>, IFilterable
    {
    private List<Chemical> _originalData;
    private List<Chemical> _items;
    private readonly Activity _context;
    private Dictionary<string, int> _alphaIndex;
    private string[] _sections;
    private Object[] _sectionsObjects;

    public ChemicalsAdapter(Activity activity, IEnumerable<Chemical> chemicals)
    {
    _items = chemicals.OrderBy(s => s.Name).ToList();
    _context = activity;

    // Setup the indexer support
    SetupIndex();

    Filter = new ChemicalFilter(this);
    }

    void SetupIndex()
    {
    _alphaIndex = new Dictionary<string, int>();
    for (var i = 0; i < _items.Count; i++)
    { // loop through items
    var key = _items[i].ToString();
    if (!_alphaIndex.ContainsKey(key))
    _alphaIndex.Add(key, i); // add each 'new' letter to the index
    }
    _sections = new string[_alphaIndex.Keys.Count];
    _alphaIndex.Keys.CopyTo(_sections, 0); // convert letters list to string[]
    // Interface requires a Java.Lang.Object[], so we create one here
    _sectionsObjects = new Object[_sections.Length];
    for (var i = 0; i < _sections.Length; i++)
    {
    _sectionsObjects[i] = new String(_sections[i]);
    }
    }

    public override long GetItemId(int position)
    {
    return position;
    }

    public override View GetView(int position, View convertView, ViewGroup parent)
    {
    var view = convertView ?? _context.LayoutInflater.Inflate(Android.Resource.Layout.SimpleListItem1, null);
    var view = convertView ?? _context.LayoutInflater.Inflate(Resource.Layout.Chemical, null);

    var chemical = _items[position];

    var nameView = view.FindViewById<TextView>(Android.Resource.Id.Text1);
    var nameView = view.FindViewById<TextView>(Resource.Id.chemName);
    var imageView = view.FindViewById<ImageView>(Resource.Id.chemImage);
    nameView.Text = chemical.Name;
    imageView.SetImageResource(chemical.DrawableId);

    return view;
    }
    @@ -75,31 +51,12 @@ public override Chemical this[int position]
    get { return _items[position]; }
    }

    public int GetPositionForSection(int section)
    {
    return _alphaIndex[_sections[section]];
    }

    public int GetSectionForPosition(int position)
    {
    var prevSection = 0;
    for (var i = 0; i < _sections.Length; i++) {
    if (GetPositionForSection(i) <= position || prevSection > position) continue;
    prevSection = i; break;
    }
    return prevSection;
    }

    public Object[] GetSections()
    {
    return _sectionsObjects;
    }

    public Filter Filter { get; private set; }

    public override void NotifyDataSetChanged()
    {
    SetupIndex();
    // If you are using cool stuff like sections
    // remember to update the indices here!
    base.NotifyDataSetChanged();
    }

    @@ -122,21 +79,33 @@ protected override FilterResults PerformFiltering(ICharSequence constraint)

    if (_adapter._originalData != null && _adapter._originalData.Any())
    {
    // Compare constraint to all names lowercased.
    // It they are contained they are added to results.
    results.AddRange(
    _adapter._originalData.Where(
    chemical => chemical.Name.ToLower().Contains(constraint.ToString())));
    }
    returnObj.Values = FromArray(results.ToArray());

    // Nasty piece of .NET to Java wrapping, be careful with this!
    returnObj.Values = FromArray(results.Select(r => r.ToJavaObject()).ToArray());
    returnObj.Count = results.Count;

    constraint.Dispose();

    return returnObj;
    }

    protected override void PublishResults(ICharSequence constraint, FilterResults results)
    {
    var res = new List<Chemical>(results.Values.ToArray<Chemical>());

    _adapter._items = res;
    using (var values = results.Values)
    _adapter._items = values.ToArray<Object>()
    .Select(r => r.ToNetObject<Chemical>()).ToList();

    _adapter.NotifyDataSetChanged();

    // Don't do this and see GREF counts rising
    constraint.Dispose();
    results.Dispose();
    }
    }
    }
    67 changes: 0 additions & 67 deletions MainActivity.cs
    View file
    Original file line number Diff line number Diff line change
    @@ -1,67 +0,0 @@
    using System.Collections.Generic;
    using Android.App;
    using Android.Runtime;
    using Android.Support.V4.View;
    using Android.Support.V7.App;
    using Android.Support.V7.Widget;
    using Android.Views;
    using Android.Widget;
    using Android.OS;

    namespace SearchViewSample
    {
    [Activity(Label = "SearchViewSample", MainLauncher = true, Icon = "@drawable/icon",
    Theme = "@style/Theme.AppCompat.Light")]
    public class Activity1 : ActionBarActivity
    {
    private SearchView _searchView;
    private ListView _listView;
    private ChemicalsAdapter _adapter;

    protected override void OnCreate(Bundle bundle)
    {
    base.OnCreate(bundle);

    // Set our view from the "main" layout resource
    SetContentView(Resource.Layout.Main);

    var chemicals = new List<Chemical>
    {
    new Chemical {Name = "Niacin"},
    new Chemical {Name = "Biotin"},
    new Chemical {Name = "Chromichlorid"},
    new Chemical {Name = "Natriumselenit"},
    new Chemical {Name = "Manganosulfate"},
    new Chemical {Name = "Natriummolybdate"},
    new Chemical {Name = "Ergocalciferol"},
    new Chemical {Name = "Cyanocobalamin"},
    };

    _listView = FindViewById<ListView>(Resource.Id.listView);
    _adapter = new ChemicalsAdapter(this, chemicals);
    _listView.Adapter = _adapter;

    }

    public override bool OnCreateOptionsMenu(IMenu menu)
    {
    MenuInflater.Inflate(Resource.Menu.main, menu);

    var item = menu.FindItem(Resource.Id.action_search);

    var searchView = MenuItemCompat.GetActionView(item);
    _searchView = searchView.JavaCast<SearchView>();

    _searchView.QueryTextChange += (s, e) => _adapter.Filter.InvokeFilter(e.NewText);

    _searchView.QueryTextSubmit += (s, e) =>
    {
    Toast.MakeText(this, "Searched for: " + e.Query, ToastLength.Short).Show();
    e.Handled = true;
    };

    return true;
    }
    }
    }

    92 changes: 92 additions & 0 deletions SearchViewActivity.cs
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,92 @@
    using System.Collections.Generic;
    using Android.App;
    using Android.Runtime;
    using Android.Support.V4.View;
    using Android.Support.V7.App;
    using Android.Support.V7.Widget;
    using Android.Views;
    using Android.Widget;
    using Android.OS;

    namespace SearchViewSample
    {
    [Activity(Label = "SearchView Sample", MainLauncher = true, Icon = "@drawable/icon",
    Theme = "@style/Theme.AppCompat.Light")]
    public class SearchViewActivity : ActionBarActivity
    {
    private SearchView _searchView;
    private ListView _listView;
    private ChemicalsAdapter _adapter;

    protected override void OnCreate(Bundle bundle)
    {
    base.OnCreate(bundle);

    SetContentView(Resource.Layout.Main);

    SupportActionBar.SetDisplayShowHomeEnabled(true);

    var chemicals = new List<Chemical>
    {
    new Chemical {Name = "Niacin", DrawableId = Resource.Drawable.Icon},
    new Chemical {Name = "Biotin", DrawableId = Resource.Drawable.Icon},
    new Chemical {Name = "Chromichlorid", DrawableId = Resource.Drawable.Icon},
    new Chemical {Name = "Natriumselenit", DrawableId = Resource.Drawable.Icon},
    new Chemical {Name = "Manganosulfate", DrawableId = Resource.Drawable.Icon},
    new Chemical {Name = "Natriummolybdate", DrawableId = Resource.Drawable.Icon},
    new Chemical {Name = "Ergocalciferol", DrawableId = Resource.Drawable.Icon},
    new Chemical {Name = "Cyanocobalamin", DrawableId = Resource.Drawable.Icon},
    };

    _listView = FindViewById<ListView>(Resource.Id.listView);
    _adapter = new ChemicalsAdapter(this, chemicals);
    _listView.Adapter = _adapter;
    }

    public override bool OnCreateOptionsMenu(IMenu menu)
    {
    MenuInflater.Inflate(Resource.Menu.main, menu);

    var item = menu.FindItem(Resource.Id.action_search);

    var searchView = MenuItemCompat.GetActionView(item);
    _searchView = searchView.JavaCast<SearchView>();

    _searchView.QueryTextChange += (s, e) => _adapter.Filter.InvokeFilter(e.NewText);

    _searchView.QueryTextSubmit += (s, e) =>
    {
    // Handle enter/search button on keyboard here
    Toast.MakeText(this, "Searched for: " + e.Query, ToastLength.Short).Show();
    e.Handled = true;
    };

    MenuItemCompat.SetOnActionExpandListener(item, new SearchViewExpandListener(_adapter));

    return true;
    }

    private class SearchViewExpandListener
    : Java.Lang.Object, MenuItemCompat.IOnActionExpandListener
    {
    private readonly IFilterable _adapter;

    public SearchViewExpandListener(IFilterable adapter)
    {
    _adapter = adapter;
    }

    public bool OnMenuItemActionCollapse(IMenuItem item)
    {
    _adapter.Filter.InvokeFilter("");
    return true;
    }

    public bool OnMenuItemActionExpand(IMenuItem item)
    {
    return true;
    }
    }
    }
    }

  2. @Cheesebaron Cheesebaron created this gist Mar 28, 2014.
    7 changes: 7 additions & 0 deletions Chemical.cs
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,7 @@
    namespace SearchViewSample
    {
    public class Chemical : Java.Lang.Object
    {
    public string Name { get; set; }
    }
    }
    143 changes: 143 additions & 0 deletions ChemicalsAdapter.cs
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,143 @@
    using System.Collections.Generic;
    using System.Globalization;
    using System.Linq;
    using Android.App;
    using Android.Views;
    using Android.Widget;
    using Java.Lang;
    using Object = Java.Lang.Object;

    namespace SearchViewSample
    {
    public class ChemicalsAdapter : BaseAdapter<Chemical>, ISectionIndexer, IFilterable
    {
    private List<Chemical> _originalData;
    private List<Chemical> _items;
    private readonly Activity _context;
    private Dictionary<string, int> _alphaIndex;
    private string[] _sections;
    private Object[] _sectionsObjects;

    public ChemicalsAdapter(Activity activity, IEnumerable<Chemical> chemicals)
    {
    _items = chemicals.OrderBy(s => s.Name).ToList();
    _context = activity;

    // Setup the indexer support
    SetupIndex();

    Filter = new ChemicalFilter(this);
    }

    void SetupIndex()
    {
    _alphaIndex = new Dictionary<string, int>();
    for (var i = 0; i < _items.Count; i++)
    { // loop through items
    var key = _items[i].ToString();
    if (!_alphaIndex.ContainsKey(key))
    _alphaIndex.Add(key, i); // add each 'new' letter to the index
    }
    _sections = new string[_alphaIndex.Keys.Count];
    _alphaIndex.Keys.CopyTo(_sections, 0); // convert letters list to string[]
    // Interface requires a Java.Lang.Object[], so we create one here
    _sectionsObjects = new Object[_sections.Length];
    for (var i = 0; i < _sections.Length; i++)
    {
    _sectionsObjects[i] = new String(_sections[i]);
    }
    }

    public override long GetItemId(int position)
    {
    return position;
    }

    public override View GetView(int position, View convertView, ViewGroup parent)
    {
    var view = convertView ?? _context.LayoutInflater.Inflate(Android.Resource.Layout.SimpleListItem1, null);

    var chemical = _items[position];

    var nameView = view.FindViewById<TextView>(Android.Resource.Id.Text1);
    nameView.Text = chemical.Name;

    return view;
    }

    public override int Count
    {
    get { return _items.Count; }
    }

    public override Chemical this[int position]
    {
    get { return _items[position]; }
    }

    public int GetPositionForSection(int section)
    {
    return _alphaIndex[_sections[section]];
    }

    public int GetSectionForPosition(int position)
    {
    var prevSection = 0;
    for (var i = 0; i < _sections.Length; i++) {
    if (GetPositionForSection(i) <= position || prevSection > position) continue;
    prevSection = i; break;
    }
    return prevSection;
    }

    public Object[] GetSections()
    {
    return _sectionsObjects;
    }

    public Filter Filter { get; private set; }

    public override void NotifyDataSetChanged()
    {
    SetupIndex();
    base.NotifyDataSetChanged();
    }

    private class ChemicalFilter : Filter
    {
    private readonly ChemicalsAdapter _adapter;
    public ChemicalFilter(ChemicalsAdapter adapter)
    {
    _adapter = adapter;
    }

    protected override FilterResults PerformFiltering(ICharSequence constraint)
    {
    var returnObj = new FilterResults();
    var results = new List<Chemical>();
    if (_adapter._originalData == null)
    _adapter._originalData = _adapter._items;

    if (constraint == null) return returnObj;

    if (_adapter._originalData != null && _adapter._originalData.Any())
    {
    results.AddRange(
    _adapter._originalData.Where(
    chemical => chemical.Name.ToLower().Contains(constraint.ToString())));
    }
    returnObj.Values = FromArray(results.ToArray());

    return returnObj;
    }

    protected override void PublishResults(ICharSequence constraint, FilterResults results)
    {
    var res = new List<Chemical>(results.Values.ToArray<Chemical>());

    _adapter._items = res;
    _adapter.NotifyDataSetChanged();
    }
    }
    }
    }
    67 changes: 67 additions & 0 deletions MainActivity.cs
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,67 @@
    using System.Collections.Generic;
    using Android.App;
    using Android.Runtime;
    using Android.Support.V4.View;
    using Android.Support.V7.App;
    using Android.Support.V7.Widget;
    using Android.Views;
    using Android.Widget;
    using Android.OS;

    namespace SearchViewSample
    {
    [Activity(Label = "SearchViewSample", MainLauncher = true, Icon = "@drawable/icon",
    Theme = "@style/Theme.AppCompat.Light")]
    public class Activity1 : ActionBarActivity
    {
    private SearchView _searchView;
    private ListView _listView;
    private ChemicalsAdapter _adapter;

    protected override void OnCreate(Bundle bundle)
    {
    base.OnCreate(bundle);

    // Set our view from the "main" layout resource
    SetContentView(Resource.Layout.Main);

    var chemicals = new List<Chemical>
    {
    new Chemical {Name = "Niacin"},
    new Chemical {Name = "Biotin"},
    new Chemical {Name = "Chromichlorid"},
    new Chemical {Name = "Natriumselenit"},
    new Chemical {Name = "Manganosulfate"},
    new Chemical {Name = "Natriummolybdate"},
    new Chemical {Name = "Ergocalciferol"},
    new Chemical {Name = "Cyanocobalamin"},
    };

    _listView = FindViewById<ListView>(Resource.Id.listView);
    _adapter = new ChemicalsAdapter(this, chemicals);
    _listView.Adapter = _adapter;

    }

    public override bool OnCreateOptionsMenu(IMenu menu)
    {
    MenuInflater.Inflate(Resource.Menu.main, menu);

    var item = menu.FindItem(Resource.Id.action_search);

    var searchView = MenuItemCompat.GetActionView(item);
    _searchView = searchView.JavaCast<SearchView>();

    _searchView.QueryTextChange += (s, e) => _adapter.Filter.InvokeFilter(e.NewText);

    _searchView.QueryTextSubmit += (s, e) =>
    {
    Toast.MakeText(this, "Searched for: " + e.Query, ToastLength.Short).Show();
    e.Handled = true;
    };

    return true;
    }
    }
    }