GalleryImageAdapter.java

/*
 	ApicAday - Everyday.. is different, your mood, your life. 
 	Copyright (c) 2010 
 		Oliver Selinger <oliver.selinger@autburst.com>,
 		Michael Greifeneder <michael.greifeneder@autburst.com> 
 
    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.autburst.picture.gallery;

import java.io.File;
import java.util.Arrays;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Gallery;
import android.widget.ImageView;

import com.autburst.picture.Utilities;

public class GalleryImageAdapter extends BaseAdapter {

	private Context ctx;
	private File albumDirectory;
	int imageBackground;
	
	File[] listFiles;

	public GalleryImageAdapter(Context c, File albumDirectory) {
	    ctx = c;
	    this.albumDirectory = albumDirectory;
	    
	    listFiles = this.albumDirectory.listFiles();
        Arrays.sort(listFiles, Utilities.getImageNameComparator());
	}
	
	@Override
	public int getCount() {
	    return albumDirectory.list().length;
	}
	
	@Override
	public void notifyDataSetChanged() {
		listFiles = this.albumDirectory.listFiles();
        Arrays.sort(listFiles, Utilities.getImageNameComparator());
        
		super.notifyDataSetChanged();
	}


	@Override
	public Object getItem(int arg0) {
	    return arg0;
	}

	@Override
	public long getItemId(int arg0) {
	    return arg0;
	}

	@Override
	public View getView(int arg0, View arg1, ViewGroup arg2) {
		ImageView iv = new ImageView(ctx);
		
//		File file = new File(this.albumDirectory, );
		BitmapFactory.Options options = new BitmapFactory.Options();
        options.inSampleSize = 6;
        options.inPurgeable = true;
        
	    Bitmap bm = Bitmap.createBitmap(BitmapFactory.decodeFile(listFiles[arg0]
				.getAbsolutePath(), options));
	    iv.setImageBitmap(bm);
	    
	    iv.setScaleType(ImageView.ScaleType.FIT_CENTER);
	    iv.setLayoutParams(new Gallery.LayoutParams(150,120));
//	    iv.setBackgroundResource(imageBackground);
	    return iv;
	}
	

    /** Returns the size (0.0f to 1.0f) of the views
     * depending on the 'offset' to the center. */
    public float getScale(boolean focused, int offset) {
            /* Formula: 1 / (2 ^ offset) */
        return Math.max(0, 1.0f / (float)Math.pow(2, Math.abs(offset)));
    }
	
	
}