Android Open Source - Test-SimpleTwitterClient Timeline Adapter

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Java Source Code

package com.example.Twitter_Android.Fragments.Adapters;
//from  www .j  a v  a2  s.co m
import android.app.Activity;
import android.widget.BaseAdapter;
import com.example.Twitter_Android.Logic.Tweet;
import com.mass.cmassive.CMassive;

import java.util.List;

/**
 * ??????????? ??????? ??? ??????????? ?????? ?????? ??? ????????????? (? ?????????).
 * ????????? ????????? ????? ?????? ?????? ???????, ? ?????? ??? ? ????? ? ??????? ??????.
 *
 * @param <T> ??? ??????????? - ???????????? Tweet, Person
 */
public abstract class TimelineAdapter<T> extends BaseAdapter {
  private CMassive<T> items;
  private long maxID = -1;    //see max_id & since_id in TwitterAPI
  private long sinceID = -1;
  private final String TAG;

  @SuppressWarnings("unchecked")
  TimelineAdapter(List<? extends T> newItems, String tag) {
    items = new CMassive<>(newItems);
    TAG = tag;
    if (newItems.get(0) instanceof Tweet) {
      sinceID = ((Tweet) newItems.get(0)).getID();
      maxID = ((Tweet) newItems.get(newItems.size() - 1)).getID() - 1;
    }
  }

  @Override
  public int getCount() {
    return items.getDataSize();
  }
  //------------------------------------------------------------------------------------------------------------------

  @Override
  public T getItem(int position) {
    return items.getItem(position);
  }
  //------------------------------------------------------------------------------------------------------------------

  @Override
  public long getItemId(int position) {
    return items.getItem(position).hashCode();
  }
  //------------------------------------------------------------------------------------------------------------------

  /**
   * Add new items instead existing items
   *
   * @param newItems items to add
   */
  @SuppressWarnings("unchecked")
  public void addItemsInstead(List<? extends T> newItems) {
    items = new CMassive<>(newItems);
    if (newItems.get(0) instanceof Tweet) {
      sinceID = ((Tweet) newItems.get(0)).getID();
      maxID = ((Tweet) newItems.get(newItems.size() - 1)).getID() - 1;
    }
    notifyDataSetChanged();
  }

  /**
   * Add new items on top of the existing items array
   *
   * @param newItems items to add
   */
  @SuppressWarnings("unchecked")
  public void addItemsToTop(List<? extends T> newItems) {
    items.insertToStart(newItems);
    notifyDataSetChanged();
    if (newItems.get(0) instanceof Tweet) {
      sinceID = ((Tweet) newItems.get(0)).getID();
    }
  }

  /**
   * Add new items at the end of the existing items array
   *
   * @param newItems items to add
   */
  @SuppressWarnings("unchecked")
  public void addItemsToBottom(List<? extends T> newItems) {
    items.insertToEnd(newItems);
    notifyDataSetChanged();
    if (newItems.get(0) instanceof Tweet) {
      maxID = ((Tweet) newItems.get(newItems.size() - 1)).getID() - 1;
    }
  }

  //------------------------------------------------------------------------------------------------------------------

  /**
   * Remove item from array and compact array
   *
   * @param item item to remove
   */
  @SuppressWarnings("unchecked")
  public void removeItem(T item) {
    items.removeItem(item);
    notifyDataSetChanged();
  }

  /**
   * Remove item from position in array
   *
   * @param position item position to remove
   */
  @SuppressWarnings("unchecked")
  public void removeItem(int position) {
    items.removeItem(position);
    notifyDataSetChanged();
  }

  /**
   * Replace last added tweet. Using in PostTweetDialog
   *
   * @param tweet update tweet.
   */
  public void updateLastAddedTweet(T tweet) {
    items.updateItem(tweet, 0);
    notifyDataSetChanged();
  }

  //------------------------------------------------------------------------------------------------------------------
  public long getMaxID() {
    return maxID;
  }

  public long getSinceID() {
    return sinceID;
  }
  //------------------------------------------------------------------------------------------------------------------

  public abstract void updateContext(Activity context);

  public String getTag() {
    return TAG;
  }
}

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