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;}