C# 如何使用MVVMCross 6.2设置选项卡标题?
我试图弄清楚如何在XamarinAndroid中使用MVVMCross 6.2+将本地化字符串正确设置为选项卡标题(或动态更改选项卡标题)。 我应该如何设置简单示例应用程序中选项卡的标题? 提前感谢你的帮助 下面是一个简单的示例应用程序: MvvmCrossTabs.Core HomeViewModel.cs App.csC# 如何使用MVVMCross 6.2设置选项卡标题?,c#,xamarin.android,tabs,mvvmcross,android-appcompat,C#,Xamarin.android,Tabs,Mvvmcross,Android Appcompat,我试图弄清楚如何在XamarinAndroid中使用MVVMCross 6.2+将本地化字符串正确设置为选项卡标题(或动态更改选项卡标题)。 我应该如何设置简单示例应用程序中选项卡的标题? 提前感谢你的帮助 下面是一个简单的示例应用程序: MvvmCrossTabs.Core HomeViewModel.cs App.cs 使用MvvmCross.IoC; 使用MvvmCross.ViewModels; 使用MvvmCrossTabs.Core.ViewModels; 命名空间MvvmCross
使用MvvmCross.IoC;
使用MvvmCross.ViewModels;
使用MvvmCrossTabs.Core.ViewModels;
命名空间MvvmCrossTabs.Core
{
公共类应用程序:MvxApplication
{
公共覆盖无效初始化()
{
createabletypes()
.以“服务”结尾
.a接口()
.registeraslazyingleton();
RegisterAppStart();
}
}
}
MvvmCrossTabs.Android
MainApplication.cs
使用系统;
使用Android.App;
使用Android.Runtime;
使用MvvmCross.Droid.Support.V7.AppCompat;
使用MvvmCrossTabs.Core;
名称空间MvvmCrossTabs.Android
{
[申请]
公共类主应用程序:MvxAppCompatApplication
{
public main应用程序():base(){}
public main应用程序(IntPtr javaReference,JniHandleOwnership transfer):base(javaReference,transfer){}
}
}
home.axml
tab1.axml(tab2.axml,tab3.axml)
styles.xml
错误的
符合事实的
@颜色/原色
@颜色/原色暗
@颜色/颜色重音
HomeView.cs
使用Android.App;
使用Android.Content.PM;
使用Android.OS;
使用Android.Support.V7.Widget;
使用MvvmCross.Droid.Support.V7.AppCompat;
使用MvvmCross.Platforms.Android.Presenters.Attributes;
使用MvvmCrossTabs.Core.ViewModels;
名称空间MvvmCrossTabs.Android
{
[活动(Label=“@string/app_name”,LaunchMode=LaunchMode.SingleTask,Theme=“@style/AppTheme”,MainLauncher=true)]
[MvxActivityPresentation]
公共类HomeView:MvxAppCompatActivity
{
创建时受保护的覆盖无效(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.home);
//将操作栏替换为新工具栏。
var-toolbar=findviewbyd(Resource.Id.toolbar);
设置支持操作栏(工具栏);
ViewModel.ShowInitialViewModelsCommand.Execute();
}
}
}
Tab1View.cs(Tab2View.cs、Tab3View.cs)
使用Android.OS;
使用Android.Runtime;
使用Android.Views;
使用MvvmCross.Droid.Support.V4;
使用MvvmCross.Platforms.Android.Binding.BindingContext;
使用MvvmCross.Platforms.Android.Presenters.Attributes;
使用MvvmCrossTabs.Core.ViewModels;
命名空间MvvmCrossTabs.Android.Views
{
[MvxTabLayoutPresentation(TABLayOUTROURCEID=Resource.Id.tabs,ViewPagerResourceId=Resource.Id.viewpager,Title=“Tab 1”,ActivityHostViewModelType=typeof(HomeViewModel))]
[寄存器(名称(选项卡1视图))]
公共类选项卡1视图:MvxFragment
{
创建时公共覆盖无效(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
//在这里创建你的片段
}
创建视图上的公共覆盖视图(布局、充气机、视图组容器、捆绑包保存状态)
{
base.OnCreateView(充气机、容器、保存状态);
返回this.BindingInflate(Resource.Layout.tab1,null);
}
}
}
您必须这样做:
if (fragments == null || fragments.Count == 0)
{
_firstFragment= (YourFragmentType)Activator.CreateInstance(typeof(YourFragmentType));
_firstFragment.ViewModel = YourVM;
_secondFragment= (YourFragmentType)Activator.CreateInstance(typeof(YourFragmentType));
_secondFragment.ViewModel = YourVM;
_thridFragment= (YourFragmentType)Activator.CreateInstance(typeof(YourFragmentType));
_thridFragment.ViewModel = YourVM;
// Strings from RESX Localization
fragments = new Dictionary<string, Fragment>
{
{ Strings.first_localized_string, _firstFragment},
{ Strings.second_localized_string, _secondFragment},
{ Strings.thrid_localized_string, _thridFragment}
};
}
viewPager = View.FindViewById<ViewPager>(Resource.Id.viewpager);
adapter = new TabsFragmentPagerAdapter(ChildFragmentManager, fragments);
viewPager.Adapter = adapter;
var tabLayout = View.FindViewById<TabLayout>(Resource.Id.tabs);
tabLayout.SetupWithViewPager(viewPager);
if(fragments==null | | fragments.Count==0)
{
_firstFragment=(YourFragmentType)Activator.CreateInstance(typeof(YourFragmentType));
_firstFragment.ViewModel=YourVM;
_secondFragment=(YourFragmentType)Activator.CreateInstance(typeof(YourFragmentType));
_secondFragment.ViewModel=YourVM;
_thridFragment=(YourFragmentType)Activator.CreateInstance(typeof(YourFragmentType));
_thridfracent.ViewModel=YourVM;
//来自RESX本地化的字符串
片段=新字典
{
{Strings.first_本地化的_string,_firstFragment},
{Strings.second_本地化的_string,_secondFragment},
{Strings.thrid_本地化_string,_thridFragment}
};
}
viewPager=View.FindViewById(Resource.Id.viewPager);
适配器=新选项卡FragmentPageRadapter(ChildFragmentManager,片段);
viewPager.Adapter=适配器;
var tabLayout=View.findviewbyd(Resource.Id.tabs);
tabLayout.SetupWithViewPager(viewPager);
您的适配器:
public class TabsFragmentPagerAdapter : FragmentPagerAdapter
{
private readonly Fragment[] fragments;
private readonly string[] titles;
public TabsFragmentPagerAdapter(FragmentManager fm, Dictionary<string, Fragment> fragments) : base(fm)
{
this.fragments = fragments.Values.ToArray();
this.titles = fragments.Keys.ToArray();
}
public override int Count => fragments.Length;
private String GetCharSeuenceFromString(string s)
{
return new String(s);
}
public override Object InstantiateItem(ViewGroup container, int position)
{
return base.InstantiateItem(container, position);
}
public override void SetPrimaryItem(ViewGroup container, int position, Object @object)
{
base.SetPrimaryItem(container, position, @object);
}
public override Fragment GetItem(int position)
{
return fragments[position];
}
public override ICharSequence GetPageTitleFormatted(int position)
{
return GetCurrentPageTitle(position);
}
private ICharSequence GetCurrentPageTitle(int position)
{
return GetCharSeuenceFromString(titles[position]);
}
}
公共类选项卡FragmentPagerAdapter:FragmentPagerAdapter
{
私有只读片段[]片段;
私有只读字符串[]标题;
公共选项卡FragmentPageRadapter(FragmentManager fm,Dictionary fragments):基本(fm)
{
this.fragments=fragments.Values.ToArray();
this.titles=fragments.Keys.ToArray();
}
public override int Count=>fragments.Length;
私有字符串GetCharSeuenceFromString(字符串s)
{
返回新字符串;
}
公共覆盖对象实例化项(视图组容器,int位置)
{
返回基地。实例化项目(容器、位置);
}
public override void SetPrimaryItem(视图组容器、int位置、Object@Object)
{
base.SetPrimaryItem(容器、位置、@object);
}
公共重写片段GetItem(int位置)
{
返回碎片[位置];
}
公共覆盖ICharSequence GetPageTitleFormatted(内部位置)
{
返回GetCurrentPageTitle(位置);
}
私有ICharSequence GetCurrentPageTitle(内部位置)
{
返回GetCharSeuenceFromString(标题[位置]);
}
}
祝你快乐
注意:不要将片段与泛型一起使用。当您的选项卡是使用
using MvvmCross.IoC;
using MvvmCross.ViewModels;
using MvvmCrossTabs.Core.ViewModels;
namespace MvvmCrossTabs.Core
{
public class App : MvxApplication
{
public override void Initialize()
{
CreatableTypes()
.EndingWith("Service")
.AsInterfaces()
.RegisterAsLazySingleton();
RegisterAppStart<HomeViewModel>();
}
}
}
using System;
using Android.App;
using Android.Runtime;
using MvvmCross.Droid.Support.V7.AppCompat;
using MvvmCrossTabs.Core;
namespace MvvmCrossTabs.Android
{
[Application]
public class MainApplication : MvxAppCompatApplication<MvxAppCompatSetup<App>, App>
{
public MainApplication() : base() { }
public MainApplication(IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer) { }
}
}
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/maincontent"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="scroll|enterAlways" />
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:layout_scrollFlags="enterAlways"
app:tabGravity="fill"
app:tabMaxWidth="0dp" />
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior" />
</android.support.design.widget.CoordinatorLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:local="http://schemas.android.com/apk/res-auto"
android:id="@+id/main_frame"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
</LinearLayout>
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat">
<item name="windowActionBar">false</item>
<item name="windowNoTitle">true</item>
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
</resources>
using Android.App;
using Android.Content.PM;
using Android.OS;
using Android.Support.V7.Widget;
using MvvmCross.Droid.Support.V7.AppCompat;
using MvvmCross.Platforms.Android.Presenters.Attributes;
using MvvmCrossTabs.Core.ViewModels;
namespace MvvmCrossTabs.Android
{
[Activity(Label = "@string/app_name", LaunchMode = LaunchMode.SingleTask, Theme = "@style/AppTheme", MainLauncher = true)]
[MvxActivityPresentation]
public class HomeView : MvxAppCompatActivity<HomeViewModel>
{
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.home);
// Replaces Action Bar with new Toolbar.
var toolbar = FindViewById<Toolbar>(Resource.Id.toolbar);
SetSupportActionBar(toolbar);
ViewModel.ShowInitialViewModelsCommand.Execute();
}
}
}
using Android.OS;
using Android.Runtime;
using Android.Views;
using MvvmCross.Droid.Support.V4;
using MvvmCross.Platforms.Android.Binding.BindingContext;
using MvvmCross.Platforms.Android.Presenters.Attributes;
using MvvmCrossTabs.Core.ViewModels;
namespace MvvmCrossTabs.Android.Views
{
[MvxTabLayoutPresentation(TabLayoutResourceId = Resource.Id.tabs, ViewPagerResourceId = Resource.Id.viewpager, Title = "Tab 1", ActivityHostViewModelType = typeof(HomeViewModel))]
[Register(nameof(Tab1View))]
public class Tab1View : MvxFragment<Tab1ViewModel>
{
public override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create your fragment here
}
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
base.OnCreateView(inflater, container, savedInstanceState);
return this.BindingInflate(Resource.Layout.tab1, null);
}
}
}
if (fragments == null || fragments.Count == 0)
{
_firstFragment= (YourFragmentType)Activator.CreateInstance(typeof(YourFragmentType));
_firstFragment.ViewModel = YourVM;
_secondFragment= (YourFragmentType)Activator.CreateInstance(typeof(YourFragmentType));
_secondFragment.ViewModel = YourVM;
_thridFragment= (YourFragmentType)Activator.CreateInstance(typeof(YourFragmentType));
_thridFragment.ViewModel = YourVM;
// Strings from RESX Localization
fragments = new Dictionary<string, Fragment>
{
{ Strings.first_localized_string, _firstFragment},
{ Strings.second_localized_string, _secondFragment},
{ Strings.thrid_localized_string, _thridFragment}
};
}
viewPager = View.FindViewById<ViewPager>(Resource.Id.viewpager);
adapter = new TabsFragmentPagerAdapter(ChildFragmentManager, fragments);
viewPager.Adapter = adapter;
var tabLayout = View.FindViewById<TabLayout>(Resource.Id.tabs);
tabLayout.SetupWithViewPager(viewPager);
public class TabsFragmentPagerAdapter : FragmentPagerAdapter
{
private readonly Fragment[] fragments;
private readonly string[] titles;
public TabsFragmentPagerAdapter(FragmentManager fm, Dictionary<string, Fragment> fragments) : base(fm)
{
this.fragments = fragments.Values.ToArray();
this.titles = fragments.Keys.ToArray();
}
public override int Count => fragments.Length;
private String GetCharSeuenceFromString(string s)
{
return new String(s);
}
public override Object InstantiateItem(ViewGroup container, int position)
{
return base.InstantiateItem(container, position);
}
public override void SetPrimaryItem(ViewGroup container, int position, Object @object)
{
base.SetPrimaryItem(container, position, @object);
}
public override Fragment GetItem(int position)
{
return fragments[position];
}
public override ICharSequence GetPageTitleFormatted(int position)
{
return GetCurrentPageTitle(position);
}
private ICharSequence GetCurrentPageTitle(int position)
{
return GetCharSeuenceFromString(titles[position]);
}
}
public class LocalizedTabPresenter : MvxAppCompatViewPresenter
{
public LocalizedTabPresenter(IEnumerable<Assembly> androidViewAssemblies) : base(androidViewAssemblies)
{
}
protected override Task<bool> ShowViewPagerFragment(Type view, MvxViewPagerFragmentPresentationAttribute attribute, MvxViewModelRequest request)
{
if (attribute.ViewModelType == typeof(Tab1ViewModel)) {
attribute.Title = "My Localized Title for Tab 1"
}
return base.ShowViewPagerFragment(view, attribute, request);
}
}
protected override IMvxAndroidViewPresenter CreateViewPresenter()
{
return new LocalizedTabPresenter(AndroidViewAssemblies);
}
public MvxBasePresentationAttribute PresentationAttribute(MvxViewModelRequest request)
{
return new MvxTabLayoutPresentationAttribute(title: _("Results"), viewPagerResourceId: Resource.Id.viewPager, tabLayoutResourceId: Resource.Id.tab_layout, fragmentHostViewType: typeof(HostFragment));
}