Base Android AsyncTaskLoader for list data with common functionality like paging.

ListAsyncTaskLoader

package net.markdevries.loader;

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

import android.content.Context;
import android.support.v4.content.AsyncTaskLoader;

public class ListAsyncTaskLoader<D> extends AsyncTaskLoader<List<D>>
{
	protected List<D> mData;

	private boolean mIsLoading = false;
	private int mCurrentPage;
	private int mItemsPerPage;
	private int mTotalPages;

	public ListAsyncTaskLoader( Context context )
	{
		super( context );
		init( );
	}

	private void init( )
	{
		mCurrentPage = 0;
	}

	public int getCurrentPage( )
	{
		return mCurrentPage;
	}

	public void setCurrentPage( int currentPage )
	{
		mCurrentPage = currentPage;
	}

	public int getItemsPerPage( )
	{
		return mItemsPerPage;
	}

	public void setItemsPerPage( int itemsPerPage )
	{
		mItemsPerPage = itemsPerPage;
	}

	public int getTotalPages( )
	{
		return mTotalPages;
	}

	public void setTotalPage( int totalPages )
	{
		mTotalPages = totalPages;
	}
	
	@Override
	public List<D> loadInBackground( )
	{
		mIsLoading = true;
		
		return null;
	}

	public void deliverResult( List<D> data )
	{
		mIsLoading = false;

		if( data != null )
		{
			if( mData == null )
				mData = data;
			else
				mData.addAll( data );
		}
		
		super.deliverResult( ( ( mData == null ) ? null : new ArrayList<D>( mData ) ) );
	};

	@Override
	protected void onStartLoading( )
	{
		if( mData != null )
			deliverResult( null );
		else
			forceLoad( );
	}
	
	@Override
	protected void onStopLoading( )
	{
		mIsLoading = false;
		cancelLoad( );
	}
	
	@Override
	protected void onReset( )
	{
		super.onReset( );
		onStopLoading( );
		mData = null;
	}
	
	public boolean getIsLoading( )
	{
		return mIsLoading;
	}
	
	public boolean getHasMoreResults( )
	{
		return( mCurrentPage <= mTotalPages );
	}
}