如何从主要活动类中的自定义列表视图适配器管理onClick函数

Question

I've created a custom adapter for a class that have a button . In this code I used onClick function in adapter class but I don't want this . I want to call it from main activity class (Like listview.setOnItemClickListener). How can I do that ? Notice that I want be able to get position of button or contact properties

public View getView(int position,View convertView,ViewGroup parent) {

    Contact contact = contacts.get(position);
    final ViewHolder holder ;
    if (convertView == null){
        holder = new ViewHolder();
        LayoutInflater inflater = LayoutInflater.from(context) ;
        convertView = inflater.inflate(resource,parent,false);
        holder.btnCall = convertView.findViewById(R.id.btnCall);
        holder.imgAvatar = convertView.findViewById(R.id.imgAvatar);
        holder.txtName = convertView.findViewById(R.id.txtName);
        holder.txtPhoneNumber = convertView.findViewById(R.id.txtPhoneNumber);
        convertView.setTag(holder);
    }else {
        holder = (ViewHolder)convertView.getTag();
    }
    holder.txtPhoneNumber.setText(contact.getContactNumber());
    holder.txtName.setText(contact.getContactName());
    int imageId = contact.getGender() == 0 ? R.drawable.male : R.drawable.female;
    holder.imgAvatar.setImageResource(imageId);
    holder.btnCall.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(context, holder.txtName.getText().toString() + " "
                    + holder.txtPhoneNumber.getText().toString(), Toast.LENGTH_SHORT).show();
        }
    });
    return convertView ;

}

private class ViewHolder{

    public ImageView imgAvatar ;
    public TextView txtPhoneNumber ;
    public TextView txtName ;
    public Button btnCall ;
}

Answer 1

You can set onItemClickListener in main class after setting the adapter like the example given below:

  listview.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, final View view,
                int position, long id) {
        final String item =(String)parent.getItemAtPosition(position);
        list.remove(item);
        adapter.notifyDataSetChanged();
        }

    });

Answer 2

将onClickListener添加到ListAdapter的getView（）中的Button中。

Answer 3

您可以创建一个带有要传递的数据参数的方法的接口，然后将该接口传递给适配器并在活动中实现该接口

Answer 4

Remove on click listener from adapter and set listview on click listener. Get data from contact array from on click position.