Android Open Source - AerisAndroidLibrary List Adapter

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License

The source code is released under:

Apache License

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Java Source Code

package com.example.listview;
//ww w  .  ja va  2 s .c o  m
import java.util.List;

import android.app.Activity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

/**
 * Abstract class for display custom ListViews
 * 
 * @author bcollins
 * 
 * @param <T>
 *            Object that is being adapted to a ListView item
 */
public abstract class ListAdapter<T> extends IndexMonitorAdapter {

  /**
   * List of Data items to display
   */
  private List<T> items;
  /**
   * Inflater to inflate each custom view
   */
  private LayoutInflater mInflater;

  private int selectedDrawable;

  /**
   * Constructor for the MenardsListAdapter
   * 
   * @param items
   * @param activity
   */
  public ListAdapter(List<T> items, Activity activity, int selectedDrawable) {
    this.items = items;
    mInflater = LayoutInflater.from(activity);
    this.selectedDrawable = selectedDrawable;
  }

  /*
   * (non-Javadoc)
   * 
   * @see android.widget.Adapter#getCount()
   */
  @Override
  public int getCount() {
    if (items == null)
      return 0;
    return items.size();
  }

  /*
   * (non-Javadoc)
   * 
   * @see android.widget.Adapter#getItem(int)
   */
  @Override
  public T getItem(int position) {
    if (items == null)
      return null;
    return items.get(position);
  }

  /*
   * (non-Javadoc)
   * 
   * @see android.widget.Adapter#getItemId(int)
   */
  @Override
  public long getItemId(int position) {
    return 0;
  }

  /**
   * Fills old view with data, or creates a new view.
   * 
   * @param position
   *            - position to create view for
   * @param convertView
   *            - view to create/recycle
   * @return
   */
  @SuppressWarnings("unchecked")
  public View getItemView(int position, View convertView) {
    T item = items.get(position);
    AdapterHolder<T> holder = null;

    if (convertView == null) {
      holder = getHolder();
      convertView = holder.inflateview(mInflater);
      convertView.setTag(holder);

    } else {
      holder = (AdapterHolder<T>) convertView.getTag();
    }
    // set the color if selected.
    if (this.selectedIndex == position) {
      convertView.setBackgroundResource(selectedDrawable);
    } else {
      // 0 removes the resource
      convertView.setBackgroundResource(0);
    }

    holder.populateView((T) item, position);
    return convertView;
  }

  /*
   * (non-Javadoc)
   * 
   * @see android.widget.Adapter#getView(int, android.view.View,
   * android.view.ViewGroup)
   */
  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    return getItemView(position, convertView);
  }

  /**
   * Gets the adapter ViewHolder for this adapter.
   * 
   * @return
   */
  public abstract AdapterHolder<T> getHolder();

  /**
   * Sets the list to another list.
   * 
   * @param list
   */
  public void setList(List<T> list) {
    items.clear();
    if (list == null)
      return;
    items.addAll(list);
  }

  /**
   * Deletes item in the list
   * 
   * @param position
   */
  public void deleteItemInList(int position) {
    items.remove(position);
  }

}

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