Android Open Source - eclipse-ui-tips Categories Fragment

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License

The source code is released under:

Eclipse Public License -v 1.0 THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF THIS ECLIPSE PUBLIC LICENSE ("AGREEMENT"). ANY USE, REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUT...

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Java Source Code

/*******************************************************************************
 * Copyright (c) 2012 Kaloyan Raev./*from   w w w  . j  a  v  a  2 s . co m*/
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Kaloyan Raev - initial implementation
 *******************************************************************************/
package name.raev.kaloyan.android.eclipseuitips;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;

import name.raev.kaloyan.android.eclipseuitips.model.Category;
import name.raev.kaloyan.android.eclipseuitips.model.Guideline;
import name.raev.kaloyan.android.eclipseuitips.model.Subcategory;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;

import com.actionbarsherlock.app.SherlockListFragment;

public class CategoriesFragment extends SherlockListFragment {

  @Override
  public void onActivityCreated(Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    setListAdapter(new CategoriesAdapter());
  }
  
  @Override
  public void onListItemClick(ListView l, View v, int position, long id) {
    // create an intent for showing the guidelines activity
    Intent intent = new Intent(getActivity(), GuidelinesPagerActivity.class);
    // determine the first guideline in the selected subcategory
    CategoryItem c = (CategoryItem) getListView().getItemAtPosition(position);
    Guideline guideline = Guideline.firstFor(Subcategory.values()[c.ordinal]);
    // pass the index of the guideline with this intent
    intent.putExtra(Guideline.EXTRA_INDEX, guideline.ordinal());
    // show the activity
    getActivity().startActivity(intent);
  }

  private class CategoriesAdapter extends ArrayAdapter<CategoryItem> {

    private LayoutInflater vi;

    public CategoriesAdapter() {
      super(getActivity(), 0, CategoryItem.list());
      vi = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      View v = convertView; // TODO try reusing the convertView

      CategoryItem c = getItem(position);
      if (c != null) {
        if (c.isSubcategory) {
          v = vi.inflate(R.layout.category_item, null);
          
          ((TextView) v.findViewById(R.id.text)).setText(c.title);
        } else {
          v = vi.inflate(R.layout.category_section, null);

          v.setOnClickListener(null);
          v.setOnLongClickListener(null);
          v.setLongClickable(false);
          
          ((TextView) v.findViewById(R.id.text)).setText(c.title);
        }
      }
      
      return v;
    }
    
  }
  
  private static class CategoryItem {
    
    int title;
    boolean isSubcategory;
    int ordinal;
    
    public CategoryItem(Category category) {
      title = category.title();
      isSubcategory = false;
      ordinal = category.ordinal();
    }
    
    public CategoryItem(Subcategory subcategory) {
      title = subcategory.title();
      isSubcategory = true;
      ordinal = subcategory.ordinal();
    }
    
    public static ArrayList<CategoryItem> list() {
      ArrayList<CategoryItem> list = new ArrayList<CategoryItem>();
      Set<Category> categories = new HashSet<Category>();
      Set<Subcategory> subcategories = new HashSet<Subcategory>();
      
      for (Guideline g : Guideline.values()) {
        Subcategory subcategory = g.subcategory();
        Category category = subcategory.category();
        
        if (!categories.contains(category)) {
          list.add(new CategoryItem(category));
          categories.add(category);
        }
        
        if (!subcategories.contains(subcategory)) {
          list.add(new CategoryItem(subcategory));
          subcategories.add(subcategory);
        }
      }
      
      return list;
    }
  }

}

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