我有兴趣创建一个通用的BaseAdapter,它将应用于任何具有任何list_item的ListView.它将为list_view设置item_row.
public class GenericAdapter extends BaseAdapter
{
Context context;
ArrayList<HashMap<String,String>> list;
LayoutInflater inflater;
public GenericAdapter (Context context,ArrayList<HashMap<String,String>> list)
{
this.context = context;
this.list = list;
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount()
{
return list.size();
}
@Override
public Object getItem(int position)
{
return list.get(position);
}
@Override
public long getItemId(int position)
{
return position;
}
@Override
public View getView(int position,View convertView,ViewGroup parent)
{
View view = convertView;
if(view == null)
{
view = inflater.inflate(R.layout.item_of_any_list,parent,false);
// i have to do something here like there may be a method which must be call
}
/*HashMap<String,String> map = list.get(position);
TextView textViewName = (TextView) view.findViewById(R.id.name);
TextView textViewDate = (TextView) view.findViewById(R.id.date);
//TextView textViewDesc = (TextView) view.findViewById(R.id.desc);
textViewName.setText(map.get("name"));
textViewDate.setText(map.get("date"));
//textViewDesc.setText(map.get("description"));
*/
return view;
}
我想我必须创建一个接口,为单个项目设置item_row.但我不知道这可能是可能的.有人能告诉我如何实现它.
我的想法是创建一个接口,GenericAdapter实现该接口.在该界面中,有一种获取和设置item_row的方法.任何扩展GenericAdapter的类都必须实现该方法.它将帮助我们制作通用适配器.
当我们扩展该适配器时,我们不需要编写所有代码,如getCount,getItem,getItemId,我们只需要覆盖一个inflateLayout函数.必须在getView中
提前致谢
@R_502_323@
两年后回答我自己的问题.
为了制作通用适配器,您需要父类中的抽象方法,这些方法应该由子实现.因此,GenericAdapter必须是Abstract,并为要更改的数据创建抽象方法.
我有不同类型的ArrayList在Adapter中显示它的模型类是不同的.所以我决定写一个genericAdapter.如果someOne对listview感兴趣,这适用于recyclerview.让我知道.
GenericAdapter
public abstract class GenericAdapter<T> extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private Context context;
private ArrayList<T> items;
public abstract RecyclerView.ViewHolder setViewHolder(ViewGroup parent);
public abstract void onBindData(RecyclerView.ViewHolder holder,T val);
public GenericAdapter(Context context,ArrayList<T> items){
this.context = context;
this.items = items;
}
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent,int viewType) {
RecyclerView.ViewHolder holder = setViewHolder(parent);
return holder;
}
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder,int position) {
onBindData(holder,items.get(position));
}
@Override
public int getItemCount() {
return items.size();
}
public void addItems( ArrayList<T> savedCardItemz){
items = savedCardItemz;
this.notifyDataSetChanged();
}
public T getItem(int position){
return items.get(position);
}
}
而且我喜欢它
adapter = new GenericAdapter<DataModel>(context,modelList) {
@Override
public RecyclerView.ViewHolder setViewHolder(ViewGroup parent) {
final View view = LayoutInflater.from(context).inflate(R.layout.item_view_holder,false);
ItemViewHolder viewHolder = new ItemViewHolder(context,view);
return viewHolder;
}
@Override
public void onBindData(RecyclerView.ViewHolder holder1,DataModel val) {
DataModel userModel = val;
ItemViewHolder holder = (ItemViewHolder)holder1;
holder.name.setText(userModel.getName());
holder.fatherName.setText(userModel.getFatherName());
}
};
mRecyclerView.setAdapter(adapter);
