Android : Interface 활용(Event Callback)

: ListAdapter > getView에서 객체 할당시  Button 객체 onClick Event를 넘겨받기 위해 활용

1. Interface  > ListItemOnClickListener

public interface ListItemOnClickListener {
     public abstract void onClick(Bundle b);
}

2. ListAdapter

public class GiftListViewAdapter extends ArrayAdapter<GiftListViewItem>{
     ListItemOnClickListener itemOnClickListener;
   
     private Context mContext;
     public GiftListViewAdapter(Context context, List<GiftListViewItem> items, ListItemOnClickListener lsnr) {
          super(context, R.layout.row_gifty_fragment, items);
        
          this.itemOnClickListener = lsnr;
          this.mContext = context;
     }

     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
          final ViewHolder viewHolder;
        
          if(convertView == null){
               LayoutInflater inflater = LayoutInflater.from(getContext());
               convertView = inflater.inflate(R.layout.row_gifty_fragment, parent, false);
             
               viewHolder = new ViewHolder();
               viewHolder.detailTextView = (TextView)convertView.findViewById(R.id.textView1);
               viewHolder.imageView = (ImageView)convertView.findViewById(R.id.imageView1);
               viewHolder.detailTextView2 = (TextView)convertView.findViewById(R.id.textView2);
               viewHolder.exchangeButton = (Button)convertView.findViewById(R.id.button1);
               convertView.setTag(viewHolder);
             
          } else {
             
               viewHolder = (ViewHolder)convertView.getTag();
             
          } //end if______________
        
          final GiftListViewItem item = getItem(position);

          Bitmap bm = item.getImageBitmap();
          viewHolder.imageView.setImageBitmap(bm);
          viewHolder.detailTextView.setText(item.getDetailText());
          viewHolder.detailTextView2.setTextColor(Color.GRAY);
          viewHolder.detailTextView2.setText(item.getDetailText2());
        
          viewHolder.exchangeButton.setOnClickListener(new OnClickListener() {
             
               @Override
               public void onClick(View v) {
                    Bundle b = new Bundle();
                    b.putString("itemCode", item.getItemCode());
                    itemOnClickListener.onClick(b);
               }
          });
        
          return convertView;
     }
   
     private static class ViewHolder{
          ImageView imageView;
          TextView detailTextView;
          TextView detailTextView2;
          Button exchangeButton;
     }
}

3. Activity

.........

private class  CustomAsyncTask extends AsyncTask<Void,Void,Result>{

....

             @Override

          protected void onPostExecute(RequestResult result) {
               // TODO Auto-generated method stub
               super.onPostExecute(result);
             
               if(this.loadingDialog != null &&  loadingDialog.isShowing()) {
                    loadingDialog.dismiss();
               }

                                   final GiftListViewAdapter adapter = new GiftListViewAdapter(getActivity(), mItems,
                                                                 new ListItemOnClickListener() {
                                      
                                        @Override
                                        public void onClick(Bundle b) {
                                           
                                             if(User.isLogined(getActivity())){
                                                  String itemCode = b.getString("itemCode");
                                                  Intent intent = new Intent(getActivity(), ActGiftContent.class);
                                                  intent.putExtra("itemCode", itemCode);
                                                  startActivity(intent);
                                             } else {
                                                  MsgBox.showToast(getActivity(), "로그인을 하셔야 이용가능합니다. ");
                                                  MainActivity mainAct = (MainActivity)getActivity();
                                                  mainAct.callLoginFragment();
                                             }
                                        }
                                   });

                 } //end method____

} //end class ===================================================