I am interested in creating a generic BaseAdapter which will apply to any ListView having any list_item . And it will set the item_row for the list_view.
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;
}
I think i have to create an interface that's get and set the item_row for individual item. But i don't know it may be possible . Can someone tell me how i can achieve it.
My idea is to create an interface and GenericAdapter implements that interface. In that interface there is a method to get and set the item_row. Any class which extends GenericAdapter must implement that method. it will help us make a generic adapter.
When we extend that adapter we don't need to write all code like getCount, getItem,getItemId, we just have to override a function which is to inflateLayout. which must be inside getView
Thanks in Advance
Answering my own Question after two years.
In order to make Generic Adapter you need abstract
methods in parent class
which should be implemented by child
. So GenericAdapter
must be Abstract
and create abstract
methods for data you want to change.
I have different types of ArrayList to show in Adapter only it's model class
is different. So I decided to write a genericAdapter
. This is for recyclerview
if someOne interested
for listview. Let me know.
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);
}
}
And I use it like
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, parent, 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);
RecyclerView with Search sort functionality
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