Xamarin 如何在GridView中旋转图像
使用Xamarin Android和Mvvm Cross在GridView中显示了一组图像,但问题是有两个按钮可将时钟和反时钟方向旋转90度,每次单击所有单元格或图像都应在GridView中旋转。 我怎样才能做到呢? 这是我的viewModel集合,它将绑定到GridViewXamarin 如何在GridView中旋转图像,xamarin,gridview,xamarin.android,image-rotation,Xamarin,Gridview,Xamarin.android,Image Rotation,使用Xamarin Android和Mvvm Cross在GridView中显示了一组图像,但问题是有两个按钮可将时钟和反时钟方向旋转90度,每次单击所有单元格或图像都应在GridView中旋转。 我怎样才能做到呢? 这是我的viewModel集合,它将绑定到GridView private ObservableCollection<Snapshot> _snapshotsItemSource; public ObservableCollection<Snapshot&
private ObservableCollection<Snapshot> _snapshotsItemSource;
public ObservableCollection<Snapshot> SnapshotsItemSource
{
get { return _snapshotsItemSource; }
set
{
_snapshotsItemSource = value;
RaisePropertyChanged(() => SnapshotsItemSource);
}
}
我的看法是,
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:mvvm="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<MvvmCross.Binding.Droid.Views.MvxGridView
android:id="@+id/gvSnapshots"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:numColumns="3"
android:layout_alignParentTop="true"
mvvm:MvxItemTemplate="@layout/snapshotcellview"
mvvm:MvxBind="ItemsSource SnapshotsItemSource" />
<RelativeLayout
android:background="@color/white"
android:layout_width="match_parent"
android:layout_height="@dimen/section_height"
android:orientation="horizontal"
android:layout_alignParentBottom="true">
<ImageButton
android:id="@+id/btnRotateLeft"
android:layout_alignParentLeft="true"
android:src="@drawable/abc_text_select_handle_left_mtrl_dark"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageButton
android:id="@+id/btnRotateRight"
android:layout_alignParentRight="true"
android:src="@drawable/abc_text_select_handle_left_mtrl_dark"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
试试Glide,这对你有帮助吗
在这里,我使用毕加索,因为Glide无法添加到项目中,并且工作正常。我想为Gridview添加它,而不是为单个图像视图添加它,Glide无法为我的项目添加另一项内容,显示Glide.xamarin无法通过Nuget包添加
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:mvvm="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<MvvmCross.Binding.Droid.Views.MvxGridView
android:id="@+id/gvSnapshots"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:numColumns="3"
android:layout_alignParentTop="true"
mvvm:MvxItemTemplate="@layout/snapshotcellview"
mvvm:MvxBind="ItemsSource SnapshotsItemSource" />
<RelativeLayout
android:background="@color/white"
android:layout_width="match_parent"
android:layout_height="@dimen/section_height"
android:orientation="horizontal"
android:layout_alignParentBottom="true">
<ImageButton
android:id="@+id/btnRotateLeft"
android:layout_alignParentLeft="true"
android:src="@drawable/abc_text_select_handle_left_mtrl_dark"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<ImageButton
android:id="@+id/btnRotateRight"
android:layout_alignParentRight="true"
android:src="@drawable/abc_text_select_handle_left_mtrl_dark"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</RelativeLayout>
Glide
.with( context )
.load( "image Url" )
.transform( new RotateTransformation( context, 90f ))
.into( imageView );
public override View OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
{
// Use this to return your custom view for this Fragment
// return inflater.Inflate(Resource.Layout.YourFragment, container, false);
base.OnCreateView(inflater, container, savedInstanceState);
var view = this.BindingInflate(Resource.Layout.SnapshotsView, null);
var toolbar = ((MainActivity)this.Activity).FindViewById(Resource.Id.toolbar);
var txtTitle = ((MainActivity)this.Activity).FindViewById<TextView>(Resource.Id.TitleText);
txtTitle.Text = ViewModel.ViewTitle;
RegisterEvents();
ViewModel.SetItemSource();
var btnLeft = view.FindViewById<ImageButton>(Resource.Id.btnRotateLeft);
btnLeft.Click += BtnLeft_Click;
var btnRight = view.FindViewById<ImageButton>(Resource.Id.btnRotateRight);
btnRight.Click += BtnRight_Click;
grid = view.FindViewById<MvxGridView>(Resource.Id.gvSnapshots);
mAdapter = new SnapshotsDataViewAdapter(this.Activity, (IMvxAndroidBindingContext)BindingContext);
grid.Adapter = mAdapter;
grid.OnItemClickListener = this;
return view;
}
void BtnLeft_Click(object sender, EventArgs e)
{
currentRotation = currentRotation + 1;
mAdapter.NotifyDataSetChanged();
}
void BtnRight_Click(object sender, EventArgs e)
{
currentRotation = currentRotation - 1;
mAdapter.NotifyDataSetChanged();
}
static int currentRotation = 0;
static float RotationTranslation = 0;
private class SnapshotsDataViewAdapter : MvxAdapter
{
SnapshotsViewModel mViewModel;
public SnapshotsDataViewAdapter(FragmentActivity context, IMvxAndroidBindingContext bindingContext) : base(context, bindingContext)
{
mViewModel = bindingContext.DataContext as SnapshotsViewModel;
}
protected override View GetBindableView(View convertView, object dataContext, ViewGroup parent, int templateId)
{
View row = convertView;
try
{
var item = (BSSnapshot)dataContext;
if (row == null)
{
row = BindingContext.BindingInflate(templateId, parent, false);
}
var imgView = row.FindViewById<ImageView>(Resource.Id.imgRotate1);
Picasso.With(Android.App.Application.Context).Load(item.ImageUrl).Into(imgView);
imgView.Rotation = currentRotation*90;
}
catch (Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
finally
{}
return row;
}
}