BasketListAdapter

gistfile1.java

package com.melikovivan.yummy;

import java.util.List;

import android.app.Activity;
import android.content.Context;
import android.graphics.BitmapFactory;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.FrameLayout;
import android.widget.ImageView;
import android.widget.TextView;

public class BasketListAdapter extends ArrayAdapter<BasketElement> {
    
    public interface onChangeTotalPrice {
        public void addToTotalPrice(float add);
        public void subtractFromTotalPrice(float sub);
      }
    
    onChangeTotalPrice someEventListener;
    
    public BasketListAdapter(Context context, int textViewResourceId,
            List<BasketElement> objects) {
        super(context, textViewResourceId, objects);
        someEventListener = (onChangeTotalPrice) ((Activity)context);
    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        
        if (convertView == null)
            convertView = new BasketListElement(getContext());

        (convertView.findViewById(R.id.minus_but))
                .setOnClickListener(new OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        BasketElement element = getItem(position);
                        if(element.getCount() > 1){
                            element.decreaseCount();
                        }
                        else {
                            remove(element);
                        }
                        BasketActivity.removeFoodFromBasket(
                                Integer.valueOf(element.getId()), getContext());
                        someEventListener.subtractFromTotalPrice(element.getPrice());
                        notifyDataSetChanged();
                    }
                });

        (convertView.findViewById(R.id.plus_but))
                .setOnClickListener(new OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        BasketElement element = getItem(position);
                        element.increaseCount();
                        BasketActivity.addFoodToBasket(
                                Integer.valueOf(element.getId()),
                                element.getTitle(), element.getPrice(),
                                getContext());
                        someEventListener.addToTotalPrice(element.getPrice());
                        notifyDataSetChanged();
                    }
                });
        ((BasketListElement) convertView).showLayout(getItem(position));
        return convertView;

    }

    class BasketListElement extends FrameLayout {

        private final View      usualLayout;

        private final TextView  tvTitle;
        private final TextView  tvCount;
        private final TextView  tvPrice;
        private final ImageView ivlImage;

        public BasketListElement(final Context context) {
            super(context);
            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            usualLayout = inflater.inflate(R.layout.basket_list_item, null);
            addView(usualLayout);

            tvTitle = (TextView) usualLayout.findViewById(R.id.food_title);
            tvPrice = (TextView) usualLayout.findViewById(R.id.food_price);
            tvCount = (TextView) usualLayout.findViewById(R.id.food_count);
            ivlImage = (ImageView) usualLayout.findViewById(R.id.food_image);
        }
        
        public void showLayout(final BasketElement element) {
            tvTitle.setText(element.getTitle());
            tvCount.setText(String.valueOf(element.getCount()));
            tvPrice.setText(String.valueOf(element.getPrice()*element.getCount()));
            ivlImage.setImageBitmap(BitmapFactory
                    .decodeFile("/data/data/com.melikovivan.yummy/files/"
                            + element.getId() + ".png"));

        }

    }

}