Question

我有一个自定义的ArrayAdapter，我在其他视图的顶部以编程方式显示的视图存在问题。我的XML列表布局有一些固定的视图，然后我根据对象动态添加其他视图。只有我动态添加的视图才重复。显然，当视图被回收时，它不像其他视图一样清除视图。但经过大量搜索后，我找不到在arrayAdapter中动态创建视图的任何示例。任何帮助，将不胜感激。感谢。

CustomArrayAdapter.java

<ContextMenu DataContext="{Binding PlacementTarget.DataContext, RelativeSource={RelativeSource Self}}">
<MenuItem Header="Show/Hide Columns" 
    ItemsSource="{Binding Columns}">
    <MenuItem.ItemTemplate>
         <DataTemplate>
              <TextBlock Text="{Binding Header}"></TextBlock>
         </DataTemplate>
    </MenuItem.ItemTemplate>
</MenuItem>
</ContextMenu>

更新代码：

public class CustomArmyAdapter extends ArrayAdapter<CustomArmy> {
GridLayout mGrid;
// View lookup cache
private static class ViewHolder {

}

public CustomArmyAdapter(Context context, ArrayList<CustomArmy> armies) {
    super(context, 0, armies);
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    CustomArmy army = getItem(position);

    if (convertView == null) {
        convertView = LayoutInflater.from(getContext()).inflate(R.layout.individual_army_view, parent, false);
    }
    mGrid = (GridLayout) convertView.findViewById(R.id.armyGridContainer);

    TextView armyNameView = (TextView) convertView.findViewById(R.id.army_name_value);
    armyNameView.setText(army.getName());

    int row = buildArmyCountAndIconViews(army);

    TextView townHallLabelView = (TextView) convertView.findViewById(R.id.townHallLabel);
    GridLayout.LayoutParams paramTHLabel = new GridLayout.LayoutParams();
    paramTHLabel.rowSpec = GridLayout.spec(row);
    paramTHLabel.columnSpec = GridLayout.spec(0, 3);
    paramTHLabel.setMargins(0,10,0,0);
    townHallLabelView.setLayoutParams(paramTHLabel);

    TextView townHallValueView = (TextView) convertView.findViewById(R.id.townHallValue);
    GridLayout.LayoutParams paramTownHall = new GridLayout.LayoutParams();
    paramTownHall.rowSpec = GridLayout.spec(row);
    paramTownHall.columnSpec = GridLayout.spec(3, 2);
    paramTownHall.setMargins(5,10,0,0);
    townHallValueView.setText(army.getTownHallRequired());
    townHallValueView.setLayoutParams(paramTownHall);


    Button loadButton = (Button) convertView.findViewById(R.id.loadButton);
    GridLayout.LayoutParams loadParam = new GridLayout.LayoutParams();
    loadParam.rowSpec = GridLayout.spec(row + 1);
    loadParam.columnSpec = GridLayout.spec(2, 3);
    loadButton.setLayoutParams(loadParam);



    return convertView;
}

private int buildArmyCountAndIconViews(CustomArmy army) {
    int column = 0;
    int row = 1;

    for (LinkedHashMap.Entry<String, Integer> armySet : army.getArmyValuesMap().entrySet() ) {
        buildArmyIconView(armySet.getKey(), column, row);
        buildArmyCountView(armySet.getValue(), column, row);
        if (column < 9) {
            column++;
        } else {
            column = 0;
            row += 2;
        }
    }


    return row + 3;
}

private void buildArmyIconView(String iconName, int column, int row) {
    ImageView iconView = new ImageView(getContext());
    GridLayout.LayoutParams iconParam = new GridLayout.LayoutParams();
    iconParam.height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 25, getContext().getResources().getDisplayMetrics());
    iconParam.width = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 25, getContext().getResources().getDisplayMetrics());
    iconParam.columnSpec = GridLayout.spec(column);
    iconParam.rowSpec = GridLayout.spec(row);
    iconParam.setMargins(7,10,0,0);
    iconView.setImageResource(getIconFromName(iconName));
    iconView.setLayoutParams(iconParam);
    mGrid.addView(iconView);
}

private void buildArmyCountView(int count, int column, int row) {
    TextView countView = new TextView(getContext());
    GridLayout.LayoutParams paramCount = new GridLayout.LayoutParams();
    paramCount.height = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 15, getContext().getResources().getDisplayMetrics());
    paramCount.width = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 25, getContext().getResources().getDisplayMetrics());
    paramCount.columnSpec = GridLayout.spec(column);
    paramCount.rowSpec = GridLayout.spec(row + 1);
    paramCount.setMargins(7,5,0,0);
    countView.setTextSize(TypedValue.COMPLEX_UNIT_SP, 14);
    countView.setText("x" + String.valueOf(count));
    countView.setLayoutParams(paramCount);
    mGrid.addView(countView);
}

private int getIconFromName(String iconName) {
    int iconId = getContext().getResources().getIdentifier(iconName + "1", "drawable", "com.clashtoolkit.clashtoolkit");
    return iconId;
}
}

Answer 1

好的，所以这是基于布莱恩的答案。我想出了如何避免重复。我将删除else子句中的所有视图，然后重新创建动态视图。这解决了我的问题。如果有人看到这个问题让我知道，但现在这就是我要去的地方

工作代码

lm()

Answer 2

如果您实施ViewHolder模式，我认为您应该能够在Layout文件中添加另一个individual_army_view.xml来保存动态视图。然后在getView()中，您可以为该布局添加视图。像这样：

public static class ViewHolder {
    public LinearLayout linearLayout;
    ...
}

@Override
public view getView(int position, View convertView, ViewGroup parent) {
    CustomArmy army = getItem(position);

    ViewHolder holder;

    if(convertView == null) {
        holder = new ViewHolder();

        holder.linearLayout.addView(<yourCustomView>);
    } ...
}

自定义ArrayAdapter重复上一个列表中的部分列表

2 个答案: