**An unhandled exception occurred in Tab View in Xamarin Android in VS2012**
**This is my layout main.axml**
C# を使用して Xamarin でナレッジ タブ ビューを実装して vs2012 を使用していないので、Visual Studio のアラート ボックスで Android エミュレーターでアプリケーションを実行すると、このエラーが発生しました。
<?xml version="1.0" encoding="utf-8"?>
<TabHost xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/tabhost"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp">
<TabWidget
android:id="@android:id/tabs"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
<FrameLayout
android:id="@android:id/tabcontent"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="5dp" />
</LinearLayout>
</TabHost>
これは私の MainActiviy Activity1.cs です
using System;
using Android.App;
using Android.Content;
using Android.Runtime;
using Android.Views;
using Android.Widget;
using Android.OS;
namespace TabView
{
[Activity(Label = "TabView", MainLauncher = true, Icon = "@drawable/icon")]
public class Activity1 : TabActivity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
CreateTab(typeof(WhatsOnActivity), "whats_on", "What's On", Resource.Drawable.ic_tab_whats_on);
CreateTab(typeof(SpeakersActivity), "speakers", "Speakers", Resource.Drawable.ic_tab_speakers);
CreateTab(typeof(SessionsActivity), "sessions", "Sessions", Resource.Drawable.ic_tab_sessions);
CreateTab(typeof(MyScheduleActivity), "my_schedule", "My Schedule", Resource.Drawable.ic_tab_my_schedule);
}
private void CreateTab(Type activityType, string tag, string label, int drawableId)
{
var intent = new Intent(this, activityType);
intent.AddFlags(ActivityFlags.NewTask);
var spec = TabHost.NewTabSpec(tag);
var drawableIcon = Resources.GetDrawable(drawableId);
spec.SetIndicator(label, drawableIcon);
spec.SetContent(intent);
TabHost.AddTab(spec);
}
}
}
アプリケーションで 4 つのタブを使用したい
**this 1st tab activity MyScheduleActivity.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;
namespace TabView
{
[Activity]
public class MyScheduleActivity : Activity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
TextView textview = new TextView(this);
textview.Text = "This is the My Schedule tab";
SetContentView(textview);
}
}
}
**this is 2nd activity SessionsActivity.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;
namespace TabView
{
[Activity]
public class SessionsActivity : Activity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
TextView textview = new TextView(this);
textview.Text = "This is the My Session tab";
SetContentView(textview);
}
}
}
**this is 3rd activity SpeakersActivity.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;
namespace TabView
{
[Activity]
public class SpeakersActivity : Activity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
TextView textview = new TextView(this);
textview.Text = "This is the My Speakers tab";
SetContentView(textview);
}
}
}
**this is 4th activity WhatsOnActivity.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;
namespace TabView
{
[Activity]
public class WhatsOnActivity : Activity
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
TextView textview = new TextView(this);
textview.Text = "This is the My Whats On tab";
SetContentView(textview);
}
}
}
**AND**
**this is my xml in Resources=>drawable folder**
1) ic_tab_my_schedule.xml
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/ic_tab_my_schedule" android:state_selected="true"/>
<item android:drawable="@drawable/ic_tab_my_schedule"/>
</selector>
2)ic_tab_sessions.xml
<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/ic_tab_sessions"
android:state_selected="true"/>
<item android:drawable="@drawable/ic_tab_sessions"/>
</selector>
3)ic_tab_speakers.xml
<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/ic_tab_speakers"
android:state_selected="true"/>
<item android:drawable="@drawable/ic_tab_speakers"/>
</selector>
4)ic_tab_whats_on.xml
<?xml version="1.0" encoding="utf-8" ?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:drawable="@drawable/ic_tab_whats_on"
android:state_selected="true"/>
<item android:drawable="@drawable/ic_tab_whats_on"/>
</selector>
そして、ドローアブルフォルダーが選択された状態と選択されていない状態で2つの画像を追加しました!
そして私はこのリンクをたどります: -TabHostチュートリアル
事前に感謝します。あなたの反応を願っています..