Sample ListView

ReadMeAubrey.md

Hi Aubrey! Please follow this steps for your ListView

1. Create Item Object.
2. Create ItemAdapter, this is the bridge between a ListView and the data that backs the list (Item).
3. Create Layout container that holds the view of each item.

And now your good.

I created a simple activity to show you how to use this 3 components in your listview. Please check ItemListActivity.

activity_item_list.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.softwen.ashonlineshop.ItemListActivity">

    <ListView
        android:id="@+id/item_list"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

container_item.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/item_name"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

    <TextView
        android:id="@+id/item_price"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"/>

</LinearLayout>

Item.java

package com.softwen.ashonlineshop.objects;

/**
 * Created by ceosilvajr on 9/25/15.
 */
public class Item {

    private String name;
    private double price;

    public Item(String name, double price) {
        this.name = name;
        this.price = price;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public double getPrice() {
        return price;
    }

    public void setPrice(double price) {
        this.price = price;
    }

}

ItemAdapter.java

package com.softwen.ashonlineshop.adapters;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import com.softwen.ashonlineshop.R;
import com.softwen.ashonlineshop.objects.Item;

import java.util.List;

/**
 * Created by ceosilvajr on 9/25/15.
 */
public class ItemAdapter extends ArrayAdapter<Item> {

    private Context mContext;
    private List<Item> mItems;

    public ItemAdapter(Context context, List<Item> objects) {
        super(context, 0, objects);
        this.mContext = context;
        this.mItems = objects;
    }

    static class ViewHolder {

        TextView tvName;
        TextView tvPrice;

        public ViewHolder(View view) {
            tvName = (TextView) view.findViewById(R.id.item_name);
            tvPrice = (TextView) view.findViewById(R.id.item_price);
        }
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        View view = convertView;
        ViewHolder viewHolder;

        if (convertView != null) {
            viewHolder = (ViewHolder) view.getTag();
        } else {
            LayoutInflater layoutInflater = (LayoutInflater) mContext
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            view = layoutInflater.inflate(R.layout.container_item,
                    parent, false);
            viewHolder = new ViewHolder(view);
            view.setTag(viewHolder);

        }

        Item item = mItems.get(position);
        viewHolder.tvName.setText(item.getName());
        viewHolder.tvPrice.setText("" + item.getPrice());

        return convertView;
    }

    @Override
    public int getCount() {
        return mItems.size();
    }

    @Override
    public Item getItem(int position) {
        return mItems.get(position);
    }
}

ItemListActivity.java

package com.softwen.ashonlineshop;

import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;

import com.softwen.ashonlineshop.adapters.ItemAdapter;
import com.softwen.ashonlineshop.objects.Item;

import java.util.ArrayList;
import java.util.List;

public class ItemListActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_item_list);

        // Initialize itemadapter with this (or the context which is the activity itself)
        // and the list of Item object in this example the dummyItem
        ItemAdapter itemAdapter = new ItemAdapter(this, getDummyItem());

        //Initialize listview object
        ListView listView = (ListView) findViewById(R.id.item_list);

        //use the itemadapter for listview adapter
        listView.setAdapter(itemAdapter);

    }



    /*
    * This is just a sample Lists of Item objects
    **/
    private List<Item> getDummyItem() {
        List<Item> items = new ArrayList<Item>();
        items.add(new Item("Item 1", 1000.00));
        items.add(new Item("Item 2", 2000.00));
        items.add(new Item("Item 3", 3000.00));
        items.add(new Item("Item 4", 4000.00));
        return items;
    }

}