listview

问题 I'm trying to center an item within a horizontal listView when selected. My current strategy is to first measure the item and scroll to the x coordinates of the referenced item within the view. Currently, any time I press an item ListView scrolls to the very end x: 538 Is there an easier way to implement this while keeping the code stateless / functional? const ItemScroll = (props) => { const createItem = (obj, rowID) => { const isCurrentlySelected = obj.id === props.currentSelectedID

问题 I'm using onpressed() to scroll down to bottom of the List view, but i want to achieve that without Pressing the botton, It must autoscroll for every screen opening. I tried to put it inside initState() its not working but if i press the button it wokrks How to make it autoScroll? Working code: floatingActionButton: new FloatingActionButton(child: Icon(Icons.arrow_downward),onPressed:_hola,) _hola(){ print("inti state started successfully"); controller1.animateTo( controller1.position

问题 I have an issue on my ListView in my xamarin.forms application where I use MVVM pattern. I hope you could help me. Here is my xaml: <ListView x:Name="MissingVolumeListView" ItemsSource="{Binding Volumes}" SelectedItem ="{Binding Id}" > <ListView.ItemTemplate> <DataTemplate> <ViewCell> <Grid x:Name="Item"> <Grid.ColumnDefinitions> <ColumnDefinition Width="*"/> <ColumnDefinition Width="40"/> </Grid.ColumnDefinitions> <Label Text="{Binding Name}" Style="{StaticResource UsualLabelTemplate}"/>

问题 I'm making an application and ran into a problem. I made separately app for google maps and it worked perfect, and I made second app in which I have listview, and by clicking on item in listview, another activity starts where google maps with different marks opens. So I manage to get another activity running after clicking on separate objects in listview, so I modified that objects .xml and .java file on same principle as I did in my google maps app but somehow it doesn't works. Main_Activity

问题 I'm making an application and ran into a problem. I made separately app for google maps and it worked perfect, and I made second app in which I have listview, and by clicking on item in listview, another activity starts where google maps with different marks opens. So I manage to get another activity running after clicking on separate objects in listview, so I modified that objects .xml and .java file on same principle as I did in my google maps app but somehow it doesn't works. Main_Activity

问题 I'm making an application and ran into a problem. I made separately app for google maps and it worked perfect, and I made second app in which I have listview, and by clicking on item in listview, another activity starts where google maps with different marks opens. So I manage to get another activity running after clicking on separate objects in listview, so I modified that objects .xml and .java file on same principle as I did in my google maps app but somehow it doesn't works. Main_Activity

问题 How to get mp3 files from a folder in SDcard and show in custom listview using BaseAdapter and also want to play the song on Item Click. I am getting the mp3 files from a SDCard particular folder using base adapter.Getting the mp3 files but unable to add to custom base Adapter. I am getting this exception : java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getImportantForAccessibility()' on a null object reference using BaseAdapter. Below is my Fragment:

问题 How to get mp3 files from a folder in SDcard and show in custom listview using BaseAdapter and also want to play the song on Item Click. I am getting the mp3 files from a SDCard particular folder using base adapter.Getting the mp3 files but unable to add to custom base Adapter. I am getting this exception : java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getImportantForAccessibility()' on a null object reference using BaseAdapter. Below is my Fragment:

问题 In reference from: Main Post I have the code where i reset the font using: ListView1.Font.Dispose(); ListView1.Font = new Font("Microsoft Sans Serif", 15F, FontStyle.Regular); Altough for some reason, at random it gives this error (so not all the time). System.ArgumentException: Invalid parameter. at System.Drawing.Font.ToLogFont(Object logFont, Graphics graphics) at System.Drawing.Font.ToLogFont(Object logFont) at System.Drawing.Font.ToHfont() at System.Windows.Forms.Control

问题 I have a ListView and I want to create an fade-in effect for populate ViewTransition. But it not works as expected. It seems that initial opacity of the delegate is 1.0 and so I need to set from property of the animation. But it looked like a flashing. So I need to set initial opacity value of my delegate to 0.0 . Now I have a new problem... when I flick the list, delegates default opacity is 0.0 and so they are invisible. So my question: Can anybody create a perfect fade-in animation for