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トップC#に関する質問Xamarin - ExpandableListViewのリスト追加

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回答編集履歴

8

コード修正

2018/10/31 07:45

投稿

f-miyu
f-miyu

スコア1625

test CHANGED
@@ -98,9 +98,9 @@
98
98
 
99
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  {
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- groupList = new List<IDictionary<string, object>>();
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+ groupList = new JavaList<IDictionary<string, object>>();
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- childList = new List<IList<IDictionary<string, object>>>();
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+ childList = new JavaList<IList<IDictionary<string, object>>>();
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105
105
 
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106
 

7

コード修正

2018/10/31 07:45

投稿

f-miyu
f-miyu

スコア1625

test CHANGED
@@ -156,6 +156,6 @@
156
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157
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  }
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- }
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+ }
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161
161
  ```

6

追記

2018/10/31 07:09

投稿

f-miyu
f-miyu

スコア1625

test CHANGED
@@ -43,3 +43,119 @@
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  あと、ダイアログで入力した値を使うのであれば、この処理は、`SetPositiveButton`の`handler`内でやるべきです。
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+
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+
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+
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+ ---
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+
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+
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+
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+ リストデータの保存は、`OnSaveInstanceState`で`PutSerializable`で行い、`OnCreate`で、`GetSerializable`で取得します。
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+
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+
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+
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+ ```C#
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+
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+ public class MainActivity : Activity
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+
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+ {
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+
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+ private JavaList<IDictionary<string, object>> groupList;
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+
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+ private JavaList<IList<IDictionary<string, object>>> childList;
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+
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+
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+
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+ protected override void OnCreate(Bundle savedInstanceState)
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+
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+ {
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+
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+ base.OnCreate(savedInstanceState);
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+
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+
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+
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+ // Set our view from the "main" layout resource
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+
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+ SetContentView(Resource.Layout.Main);
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+
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+
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+
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+ ...
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+
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+
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+
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+ if (savedInstanceState != null)
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+
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+ {
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+
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+ groupList = savedInstanceState.GetSerializable(nameof(groupList)).JavaCast<JavaList<IDictionary<string, object>>>();
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+
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+ childList = savedInstanceState.GetSerializable(nameof(childList)).JavaCast<JavaList<IList<IDictionary<string, object>>>>();
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+
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+ }
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+
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+ else
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+
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+ {
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+
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+ groupList = new List<IDictionary<string, object>>();
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+
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+ childList = new List<IList<IDictionary<string, object>>>();
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+
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+
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+
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+ ...
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+
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+ }
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+
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+
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+
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+ SimpleExpandableListAdapter adapter = new SimpleExpandableListAdapter(
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+
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+ this,
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+
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+ groupList,
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+
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+ Android.Resource.Layout.SimpleExpandableListItem1,
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+
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+ new string[] { "GROUPE_TITLE" },
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+
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+ new int[] { Android.Resource.Id.Text1 },
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+
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+ childList,
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+
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+ Android.Resource.Layout.SimpleExpandableListItem2,
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+
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+ new string[] { "CHILD_TITLE" },
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+
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+ new int[] { Android.Resource.Id.Text2 }
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+
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+ );
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+
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+ memolist.SetAdapter(adapter);
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+
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+
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+
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+ ...
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+
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+ }
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+
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+
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+
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+ protected override void OnSaveInstanceState(Bundle outState)
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+
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+ {
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+
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+ base.OnSaveInstanceState(outState);
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+
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+
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+
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+ outState.PutSerializable(nameof(groupList), groupList.JavaCast<ISerializable>());
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+
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+ outState.PutSerializable(nameof(childList), childList.JavaCast<ISerializable>());
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+
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+ }
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+
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+ }
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+
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+ ```

5

コード修正

2018/10/31 07:08

投稿

f-miyu
f-miyu

スコア1625

test CHANGED
@@ -20,7 +20,7 @@
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  var newGroupElement = new JavaDictionary<string, object>();
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- newGroupElement.Add("GROUPE_LIST", notename.Text);
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+ newGroupElement.Add("GROUPE_TITLE", notename.Text);
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  groupList.Add(newGroupElement);
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4

コード修正

2018/10/31 02:51

投稿

f-miyu
f-miyu

スコア1625

test CHANGED
@@ -14,7 +14,7 @@
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- if (!string.IsNullOrEmpty(notename.Text)
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+ if (!string.IsNullOrEmpty(notename.Text))
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  {
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3

コード修正

2018/10/29 02:44

投稿

f-miyu
f-miyu

スコア1625

test CHANGED
@@ -10,17 +10,31 @@
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  {
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- var newGroupElement = new JavaDictionary<string, object>();
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+ Toast.MakeText(this, notename.Text, ToastLength.Short).Show();
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- newGroupElement.Add("GROUPE_LIST", notename.Text);
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+
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- groupList.Add(newGroupElement);
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+ if (!string.IsNullOrEmpty(notename.Text)
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- adapter.NotifyDataSetChanged();
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+ {
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+ var newGroupElement = new JavaDictionary<string, object>();
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+ newGroupElement.Add("GROUPE_LIST", notename.Text);
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+ groupList.Add(newGroupElement);
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+
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- Toast.MakeText(this, notename.Text, ToastLength.Short).Show();
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+ adapter.NotifyDataSetChanged();
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+
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+ }
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+
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+ else
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+
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+ {
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+
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+ //　未入力エラー
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+
37
+ }
24
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25
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  });
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2

コード修正

2018/10/29 02:44

投稿

f-miyu
f-miyu

スコア1625

test CHANGED
@@ -20,7 +20,7 @@
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- Toast.MakeText(this, notename.Text, ToastLength.Short).Show());
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+ Toast.MakeText(this, notename.Text, ToastLength.Short).Show();
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  });
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1

コード修正

2018/10/29 02:41

投稿

f-miyu
f-miyu

スコア1625

test CHANGED
@@ -6,13 +6,23 @@
6
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  ```C#
8
8
 
9
- var newGroupElement = new JavaDictionary<string, object>();
9
+ dlg.SetPositiveButton("OK", (s, a) =>
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11
- newGroupElement.Add("GROUPE_LIST", notename.Text);
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+ {
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- groupList.Add(newGroupElement);
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+ var newGroupElement = new JavaDictionary<string, object>();
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+ newGroupElement.Add("GROUPE_LIST", notename.Text);
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+
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+ groupList.Add(newGroupElement);
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+
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- adapter.NotifyDataSetChanged();
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+ adapter.NotifyDataSetChanged();
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+
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+
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+
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+ Toast.MakeText(this, notename.Text, ToastLength.Short).Show());
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+
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+ });
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  ```
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