Android Open Source - d8androidsdk Category Articles List Adapter






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License

The source code is released under:

MIT License

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Java Source Code

/**
 * The MIT License (MIT)//  w  ww  .ja  v  a2  s  . c  o m
 * Copyright (c) 2014 Lemberg Solutions Limited
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.ls.drupal8demo.adapters;

import com.android.volley.RequestQueue;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.ImageLoader;
import com.android.volley.toolbox.ImageLoader.ImageCache;
import com.android.volley.toolbox.NetworkImageView;
import com.android.volley.toolbox.Volley;
import com.ls.drupal.AbstractBaseDrupalEntity;
import com.ls.drupal.AbstractBaseDrupalEntity.OnEntityRequestListener;
import com.ls.drupal.DrupalClient;
import com.ls.drupal8demo.R;
import com.ls.drupal8demo.article.ArticlePreview;
import com.ls.drupal8demo.article.Page;
import com.ls.http.base.ResponseData;

import android.content.Context;
import android.graphics.Bitmap;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

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

public class CategoryArticlesListAdapter extends BaseAdapter implements OnEntityRequestListener {

  private final static int PRE_LOADING_PAGE_OFFSET = 4;

  private int mPagesLoaded = 0;
  private boolean mCanLoadMore;

  private Page mArticlePreviews;
  private final DrupalClient mDrupalClient;
  private final LayoutInflater mInflater;
  private ImageLoader mImageLoader;
  private String mCategoryId;
  private View mEmptyView;

  private final List<ArticlePreview> mArticlePreviewList;

  public CategoryArticlesListAdapter(String theCategoryId, DrupalClient theClient, Context theContext,
      View emptyView) {
    mEmptyView = emptyView;
    mArticlePreviewList = new ArrayList<ArticlePreview>();
    mInflater = LayoutInflater.from(theContext);
    mDrupalClient = theClient;
    setCanLoadMore(true);
    mCategoryId = theCategoryId;
    initImageLoader(theContext);
    loadNextPage();
  }

  private void initImageLoader(Context theContext) {
    RequestQueue queue = Volley.newRequestQueue(theContext);
    mImageLoader = new ImageLoader(queue, new ImageCache() {
      @Override
      public void putBitmap(String url, Bitmap bitmap) {
      }

      @Override
      public Bitmap getBitmap(String url) {
        return null;
      }
    });
  }

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

  @Override
  public ArticlePreview getItem(int position) {
    return mArticlePreviewList.get(position);
  }

  @Override
  public long getItemId(int position) {
    return position;
  }

  public void setCanLoadMore(boolean canLoadMore) {
    mCanLoadMore = canLoadMore;
    if (!mCanLoadMore && mArticlePreviewList.isEmpty()) {
      mEmptyView.setVisibility(View.VISIBLE);
    } else {
      mEmptyView.setVisibility(View.INVISIBLE);
    }
  }

  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
    if (position > mArticlePreviewList.size() - PRE_LOADING_PAGE_OFFSET) {
      loadNextPage();
    }

    if (convertView == null) {
      convertView = mInflater.inflate(R.layout.list_item_article, null);
    }

    ArticlePreview item = mArticlePreviewList.get(position);
    if (item != null) {
      TextView title = (TextView) convertView.findViewById(R.id.title);
      title.setText(Html.fromHtml(item.getTitle()).toString());

      TextView author = (TextView) convertView.findViewById(R.id.author);
      View byView = convertView.findViewById(R.id.by);
      String authorName = item.getAuthor();
      if (authorName != null && !authorName.isEmpty()) {
        author.setText(authorName);
        byView.setVisibility(View.VISIBLE);
        author.setVisibility(View.VISIBLE);
      } else {
        byView.setVisibility(View.INVISIBLE);
        author.setVisibility(View.INVISIBLE);
      }

      TextView date = (TextView) convertView.findViewById(R.id.date);
      date.setText(item.getDate());

      TextView description = (TextView) convertView.findViewById(R.id.description);
      description.setText(Html.fromHtml(item.getBody()));

      NetworkImageView imageView = (NetworkImageView) convertView.findViewById(R.id.image);
      imageView.setImageUrl(item.getImage(), mImageLoader);
    }
    return convertView;
  }

  private void loadNextPage() {
    if (mCanLoadMore && mArticlePreviews == null) {
      mArticlePreviews = new Page(mDrupalClient, mPagesLoaded, mCategoryId);
      mArticlePreviews.pullFromServer(false, null, this);
    }
  }

  @Override
  public void onRequestCompleted(AbstractBaseDrupalEntity entity, Object tag, ResponseData data) {
    if (!mArticlePreviews.isEmpty()) {
      mArticlePreviewList.addAll(mArticlePreviews);
      mArticlePreviews = null;
      mPagesLoaded++;
      notifyDataSetChanged();
    } else {
      setCanLoadMore(false);
    }
  }

  @Override
  public void onRequestFailed(AbstractBaseDrupalEntity entity, Object tag, VolleyError error) {
    setCanLoadMore(false);
  }

  @Override
  public void onRequestCanceled(AbstractBaseDrupalEntity entity, Object tag) {
  }

}




Java Source Code List

com.ls.drupal8demo.AppConstants.java
com.ls.drupal8demo.ArticleActivity.java
com.ls.drupal8demo.ArticleFragment.java
com.ls.drupal8demo.CategoryFragment.java
com.ls.drupal8demo.MainActivity.java
com.ls.drupal8demo.adapters.CategoriesAdapter.java
com.ls.drupal8demo.adapters.CategoryArticlesListAdapter.java
com.ls.drupal8demo.article.ArticlePreview.java
com.ls.drupal8demo.article.Article.java
com.ls.drupal8demo.article.Page.java
com.ls.drupal8demo.drupal.DrupalValueArrayWrapper.java
com.ls.drupal8demo.drupal.DrupalValueContainer.java
com.ls.drupal8demo.vo.Category.java
com.ls.drupal.AbstractBaseDrupalEntity.java
com.ls.drupal.AbstractDrupalArrayEntity.java
com.ls.drupal.AbstractDrupalEntityContainer.java
com.ls.drupal.AbstractDrupalEntity.java
com.ls.drupal.DrupalClient.java
com.ls.drupal.login.AnonymousLoginManager.java
com.ls.drupal.login.ILoginManager.java
com.ls.http.base.BaseRequest.java
com.ls.http.base.ICharsetItem.java
com.ls.http.base.IPostableItem.java
com.ls.http.base.IResponseItem.java
com.ls.http.base.JSONRequestHandler.java
com.ls.http.base.JSONResponseHandler.java
com.ls.http.base.RequestHandler.java
com.ls.http.base.ResponseData.java
com.ls.http.base.ResponseHandler.java
com.ls.http.base.SharedGson.java
com.ls.http.base.XMLRequestHandler.java
com.ls.http.base.XMLResponseHandler.java
com.ls.util.ClassManagementUtiles.java
com.ls.util.L.java
com.ls.util.ObjectComparator.java
com.ls.util.ObjectsFactory.java