滚动永远不会出现在ListView中

Question

package .skyrealm.com;

import android.content.Context;
import android.graphics.Color;
import android.text.Layout;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.squareup.picasso.Picasso;

import java.util.ArrayList;

/**
 * Created by RockyFish on 1/24/16.
*/
public class LocalQueueAdapter extends BaseAdapter {
        Context context;
        LayoutInflater layoutInflater;
        ArrayList<ArrayList<String>> localQueueInfo;

        public LocalQueueAdapter(Context context, ArrayList<ArrayList<String>> localQueueInfo)
        {
            this.context = context;
            layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            this.localQueueInfo = localQueueInfo;
        }
        @Override
        public int getCount() {
            return localQueueInfo.size();
        }

        @Override
        public Object getItem(int position) {
            return localQueueInfo.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        public class Holder
        {
            TextView songNameTextView, artistNameTextView, usernameTextView, numberEditText;
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            View rowView = layoutInflater.inflate(R.layout.local_queue_list_item, null);
            Holder holder = new Holder();
            holder.songNameTextView = (TextView) rowView.findViewById(R.id.songNameTextView);
            holder.artistNameTextView = (TextView) rowView.findViewById(R.id.artistNameTextView);
            holder.usernameTextView = (TextView) rowView.findViewById(R.id.usernameTextView);
            holder.numberEditText = (TextView) rowView.findViewById(R.id.numberTextView);


            holder.songNameTextView.setText("  " + localQueueInfo.get(position).get(1));
            holder.artistNameTextView.setText(" - " + localQueueInfo.get(position).get(2));
            holder.usernameTextView.setText(localQueueInfo.get(position).get(4));
            holder.numberEditText.setText(String.valueOf(position + 1) + ".");

            if(position == 0)
            {
                rowView.setBackgroundColor(Color.parseColor("#45B8AC"));
            } else if(position == 1)
            {
                rowView.setBackgroundColor(Color.parseColor("#74E2D5"));
            }
            return rowView;
        }
}

我在WPF App中有这段代码。

问题 - 滚动永远不会出现。而不是添加滚动 <Grid> <Grid.RowDefinitions> <RowDefinition Height="Auto" /> <RowDefinition Height="*" /> </Grid.RowDefinitions> <ListView Grid.Row="1" Margin="0" Background="Transparent" ItemsSource="{Binding Path=HistoryList, Mode=OneWay}" Name="leftPanelScrollViewer" ScrollViewer.VerticalScrollBarVisibility="Auto" ScrollViewer.HorizontalScrollBarVisibility="Disabled"> <ListView.ItemTemplate> <DataTemplate> <Border Background="{Binding Background}" Tag="{Binding Id}" ContextMenuOpening="FrameworkElement_OnContextMenuOpening" ContextMenuClosing="FrameworkElement_OnContextMenuClosing" ContextMenuService.HasDropShadow="True" ContextMenuService.Placement="Bottom" ContextMenuService.PlacementTarget="{Binding ElementName=PersonNameHistoryItem}" Padding="10 80" CornerRadius="3" BorderThickness="0" Margin="5,0,5,5" MouseLeftButtonUp="Item_OnMouseDown"> <Grid Background="Transparent"> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> <ColumnDefinition /> </Grid.ColumnDefinitions> <Image Grid.Column="0" VerticalAlignment="Top" Width="44" Height="44" Source="/Size.WPF;component/Assets/default-avatar.png" /> ... </Grid> </Border> </DataTemplate> </ListView.ItemTemplate> </ListView> </Grid> 使得Height更大。

与ListView相同。

当我不需要滚动时，它看起来像 和 当我需要滚动时，它看起来像

包裹ListBox：ListBox＆gt; Page（

Grid

）＆gt; <Grid.RowDefinitions> <RowDefinition Height="90" /> <RowDefinition Height="780" /> <RowDefinition Height="Auto" /> </Grid.RowDefinitions> （Grid）＆gt; Grid.RowSpan="3"＆gt; Border（Grid）＆gt; <RowDefinition Height="*" />

Answer 1

您可能已将网格放入堆栈面板或其他一些未绑定的控件中。

堆叠面板增长到其内容所需的大小。

您需要限制堆栈面板的最大大小或完全删除它。

一旦完成，滚动条就会出现。