RecipesAndIngredientsListFragment.java

package com.robotoworks.example.recipes;

import android.content.Context;
import android.database.Cursor;
import android.os.Bundle;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager;
import android.support.v4.content.Loader;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.robotoworks.example.recipes.content.RecipesDBContract.RecipesAndIngredients;
import com.robotoworks.mechanoid.db.SQuery;

public class RecipesAndIngredientsListFragment extends ListFragment {

    private RecipesCursorAdapter mAdapter;
    
    private static final String[] PROJECTION = { 
            RecipesAndIngredients._ID, 
            RecipesAndIngredients.ROW_TYPE,
            RecipesAndIngredients.TITLE,
            RecipesAndIngredients.DESCRIPTION,
            RecipesAndIngredients.INGREDIENT_QUANTITY,
            RecipesAndIngredients.SORT_KEY
    };
    
    private interface ColumnIndices {
    	int ROW_TYPE = 1;
    };

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);

        mAdapter = new RecipesCursorAdapter(getActivity());
        setListAdapter(mAdapter);
        
        getLoaderManager().initLoader(0, null, mLoaderCallbacks);
    }
    
    class RecipesCursorAdapter extends SimpleCursorAdapter {
    	private static final int VIEWTYPE_COUNT = 2;
    	private static final int VIEWTYPE_RECIPE = 0;
    	private static final int VIEWTYPE_INGREDIENT = 1;
    	
		private LayoutInflater mInflater;
    	
        public RecipesCursorAdapter(Context context) {
            super(context, 
                    R.layout.item_recipe, null,
                    new String[] {
            			RecipesAndIngredients.TITLE,
            			RecipesAndIngredients.DESCRIPTION,
            			RecipesAndIngredients.INGREDIENT_QUANTITY
                    }, 
                    new int[] {
                        R.id.title,
                        R.id.description,
                        R.id.quantity
                    }, 0);
            
            mInflater = (LayoutInflater) LayoutInflater.from(getActivity());
        }
        
        @Override
        public int getViewTypeCount() {
        	return VIEWTYPE_COUNT;
        }
        
        @Override
        public int getItemViewType(int position) {
        	Cursor cursor = (Cursor) getItem(position);
        	
        	return cursor.getInt(ColumnIndices.ROW_TYPE);
        }
        
        @Override
        public View newView(Context context, Cursor cursor, ViewGroup parent) {
            int viewType = getItemViewType(cursor.getPosition());
            
            switch(viewType) {
            case VIEWTYPE_RECIPE:
                return mInflater.inflate(R.layout.item_recipe, parent, false);
            case VIEWTYPE_INGREDIENT:
                return mInflater.inflate(R.layout.item_ingredient, parent, false);
            default:
                throw new IllegalStateException("Unexpected view type!");
            }
        }
    }
    
    LoaderManager.LoaderCallbacks<Cursor> mLoaderCallbacks = 
            new LoaderManager.LoaderCallbacks<Cursor>() {
        @Override
        public Loader<Cursor> onCreateLoader(int id, Bundle args) {
            return SQuery.newQuery().createSupportLoader(
                    RecipesAndIngredients.CONTENT_URI, PROJECTION);
        }
    
        @Override
        public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
            mAdapter.swapCursor(cursor);
        }
    
        @Override
        public void onLoaderReset(Loader<Cursor> loader) {
            mAdapter.swapCursor(null);
        }
    };
}