Android Open Source - RSSReader Example Paged Drag Drop Grid Adapter

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The source code is released under:
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Java Source Code

/**
 * Copyright 2012 /*  ww  w . j  a  va2  s  .  c  om*/
 * 
 * Nicolas Desjardins  
 * https://github.com/mrKlar
 * 
 * Facilite solutions
 * http://www.facilitesolutions.com/
 * 
 * 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 ca.laplanete.mobile.example;

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

import net.uyghurdev.avaroid.rssreader.Configs;
import net.uyghurdev.avaroid.rssreader.R;
import net.uyghurdev.avaroid.rssreader.data.FeedData;
import net.uyghurdev.avaroid.rssreader.operator.Feed;

import android.content.Context;
import android.graphics.Color;
import android.graphics.Point;
import android.util.Log;
import android.view.Display;
import android.view.Gravity;
import android.view.View;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup.LayoutParams;
import android.view.WindowManager;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import ca.laplanete.mobile.pageddragdropgrid.DragDropGrid;
import ca.laplanete.mobile.pageddragdropgrid.PagedDragDropGrid;
import ca.laplanete.mobile.pageddragdropgrid.PagedDragDropGridAdapter;

public class ExamplePagedDragDropGridAdapter implements
    PagedDragDropGridAdapter  {

  private Context context;
  private PagedDragDropGrid gridview;
  DragDropGrid grid;
  ArrayList<Feed> feeds=new ArrayList<Feed>();
  List<Page> pages = new ArrayList<Page>();
  
  public ExamplePagedDragDropGridAdapter(Context context,
      PagedDragDropGrid gridview) {
    super();
    FeedData data = new FeedData(context);
    feeds = data.getFeeds();
    this.context = context;
    this.gridview = gridview;
    int a = feeds.size();
    int b = 8;
    int c;
    if (a % b == 0) {
      c = a / b;
    } else {
      c = a / b + 1;
    }
    List<Item> items = new ArrayList<Item>();
    for (int i = 0; i < c; i++) {

      Page page = new Page();
      items = new ArrayList<Item>();
      int e;
      if (b + i * b > a - 1) {
        e = a;
      } else {
        e = b + i * b;
      }
      for (int j = i + i * (b-1); j < e; j++) {
        items.add(new Item(j, feeds.get(j).getTitle(), R.drawable.icon));
        page.setItems(items);
        
      }
      pages.add(page);
    }
    
  }

  @Override
  public int pageCount() {
    return pages.size();
  }

  private List<Item> itemsInPage(int page) {
    if (pages.size() > page) {
      return pages.get(page).getItems();
    }
    return Collections.emptyList();
  }

  @Override
  public View view(int page, int index) {
    
    LinearLayout layout = new LinearLayout(context);
    layout.setOrientation(LinearLayout.VERTICAL);
    ImageView icon = new ImageView(context);
    Item item = getItem(page, index);
    icon.setImageResource(item.getDrawable());
    icon.setPadding(15, 15, 15, 15);

    layout.addView(icon);

    TextView label = new TextView(context);
    label.setTag("text");
    label.setText(item.getName());
    label.setTextColor(Color.BLACK);
    label.setGravity(Gravity.TOP | Gravity.CENTER_HORIZONTAL);

    label.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT,
        LayoutParams.WRAP_CONTENT));

    layout.setLayoutParams(new LinearLayout.LayoutParams(
        LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

    // only set selector on every other page for demo purposes
    // if you do not wish to use the selector functionality, simply
    // disregard this code
    if (page % 2 == 0) {
      setViewBackground(layout);
      layout.setClickable(true);
      layout.setOnLongClickListener(new OnLongClickListener() {
        @Override
        public boolean onLongClick(View v) {
          
          return gridview.onLongClick(v);
        }
      });
    }
    layout.addView(label);
    return layout;
  }

  //@TargetApi(Build.VERSION_CODES.JELLY_BEAN)
  private void setViewBackground(LinearLayout layout) {
    if (android.os.Build.VERSION.SDK_INT >= 16) {
      layout.setBackgroundDrawable(context.getResources().getDrawable(
          R.drawable.ic_launcher));
    }
  }

  private Item getItem(int page, int index) {
    List<Item> items = itemsInPage(page);
    return items.get(index);
  }

  @Override
  public int rowCount() {
    return AUTOMATIC;
  }

  @Override
  public int columnCount() {
    return AUTOMATIC;
  }

  @Override
  public int itemCountInPage(int page) {
    return itemsInPage(page).size();
  }

  public void printLayout() {
    int i = 0;
    for (Page page : pages) {
      Log.d("Page", Integer.toString(i++));

      for (Item item : page.getItems()) {
        Log.d("Item", Long.toString(item.getId()));
      }
    }
  }

  private Page getPage(int pageIndex) {
    
    return pages.get(pageIndex);
  }

  @Override
  public void swapItems(int pageIndex, int itemIndexA, int itemIndexB) {
    Log.e("Swap Item", " A: "+itemIndexA+" B: "+ itemIndexB);
    getPage(pageIndex).swapItems(itemIndexA, itemIndexB);
  }

  @Override
  public void moveItemToPreviousPage(int pageIndex, int itemIndex) {
    int leftPageIndex = pageIndex - 1;
    if (leftPageIndex >= 0) {
      Page startpage = getPage(pageIndex);
      Page landingPage = getPage(leftPageIndex);

      Item item = startpage.removeItem(itemIndex);
      landingPage.addItem(item);
    }
  }

  @Override
  public void moveItemToNextPage(int pageIndex, int itemIndex) {
    int rightPageIndex = pageIndex + 1;
    if (rightPageIndex < pageCount()) {
      Page startpage = getPage(pageIndex);
      Page landingPage = getPage(rightPageIndex);

      Item item = startpage.removeItem(itemIndex);
      landingPage.addItem(item);
    }
  }

  @Override
  public void deleteItem(int pageIndex, int itemIndex)  {
    
    Configs.FeedId = feeds.get(itemIndex).getId();
    Configs.FeedUrl = feeds.get(itemIndex).getUrl();
    Configs.FeedTitle = feeds.get(itemIndex).getTitle();
    FeedData data = new FeedData(context);
    //data.deleteFeed(Configs.FeedTitle);
    FeedData data2 = new FeedData(context);
    data2.deleteFeed(pageIndex, itemIndex);
    //gridview.refreshView(context,gridview);
    data2.updateTable();
    getPage(pageIndex).deleteItem(itemIndex);
    
    
  }


  

  @Override
  public int deleteDropZoneLocation() {
    return BOTTOM;
  }

  @Override
  public boolean showRemoveDropZone() {
    return true;
  }


  @Override
  public void refreshCurrentView(PagedDragDropGridAdapter adapter,
      PagedDragDropGrid gridview) {
    // TODO Auto-generated method stub
    gridview.setAdapter(adapter);
  }


  



  

}
Java Source Code List
