android分类列表视图与自定义标题

时间:2017-01-31 13:25:39

标签: android listview

我已经有一个截面列表视图,它使用一般字符串作为每个部分的标题。现在我想扩展它也将图像放在标题中。以下是适配器的工作原理。我也有自定义布局。

我需要在节标题中调整什么才能将图像与标题中的字符串一起包含?我已经尝试过一些东西,在addSection中增加视图和设置项目,但它们都导致错误,所以我回到了开头。

这是适配器

public final Map<String, Adapter> sections = new LinkedHashMap<>();
public final ArrayAdapter<String> headers;
public final static int TYPE_SECTION_HEADER = 0;

public SectionalListAdapter(Context context)
{
    headers = new ArrayAdapter<>(context, R.layout.list_header);
}
public void addSection(String section, Drawable icon, Adapter adapter)
{
    this.headers.add(section);
    this.sections.put(section, adapter);
}
public Object getItem(int position)
{
    for (Object section : this.sections.keySet())
    {
        Adapter adapter = sections.get(section);
        int size = adapter.getCount() + 1;

        // check if position inside this section
        if (position == 0) return section;
        if (position < size) return adapter.getItem(position - 1);

        // otherwise jump into next section
        position -= size;
    }
    return null;
}
public int getCount()
{
    // total together all sections, plus one for each section header
    int total = 0;
    for (Adapter adapter : this.sections.values())
        total += adapter.getCount() + 1;
    return total;
}
@Override
public int getViewTypeCount()
{
    // assume that headers count as one, then total all sections
    int total = 1;
    for (Adapter adapter : this.sections.values())
        total += adapter.getViewTypeCount();
    return total;
}
@Override
public int getItemViewType(int position)
{
    int type = 1;
    for (Object section : this.sections.keySet())
    {
        Adapter adapter = sections.get(section);
        int size = adapter.getCount() + 1;

        // check if position inside this section
        if (position == 0) return TYPE_SECTION_HEADER;
        if (position < size) return type + adapter.getItemViewType(position - 1);

        // otherwise jump into next section
        position -= size;
        type += adapter.getViewTypeCount();
    }
    return -1;
}
@Override
public boolean isEnabled(int position) {return (getItemViewType(position) != TYPE_SECTION_HEADER);}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
    int sectionnum = 0;
    for (Object section : this.sections.keySet())
    {
        Adapter adapter = sections.get(section);
        int size = adapter.getCount() + 1;

        // check if position inside this section
        if (position == 0) return headers.getView(sectionnum, convertView, parent);
        if (position < size) return adapter.getView(position - 1, convertView, parent);

        // otherwise jump into next section
        position -= size;
        sectionnum++;
    }
    return null;
}
@Override
public long getItemId(int position){return position;}

0 个答案:

没有答案