FileViewArrayAdapter.java

package org.paulmach.textedit;

import java.io.File;
import java.util.List;

import android.content.Context;
import android.text.Spannable;
import android.text.style.AbsoluteSizeSpan;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;


/********************************************************************
 * class FileViewArrayAdapter
 * 		Extended Array adapter to get custom views on the list of 
 *      files for the file browser and recently opened lists */
public class FileViewArrayAdapter extends ArrayAdapter<String>
{
	public static final int RECENT_FILE_MODE = 1;
	public static final int FILE_BROWSER_MODE = 2;

	private final Spannable.Factory sf = new Spannable.Factory();
	private final LayoutInflater factory = LayoutInflater.from(getContext());
	
	protected int mode = 0;
	
	// just a basic constructor
	public FileViewArrayAdapter(Context context, int resource, List<String> objects) {
		super(context, resource, objects);		
		mode = RECENT_FILE_MODE;
	} // end constructor one
	
	public FileViewArrayAdapter(Context context, List<String> objects) {
		// layout is 0 because we do it ourselves below
		// android.R.layout.select_dialog_singlechoice
		// would be the one to use normally.		
		super(context, 0, objects);
		mode = RECENT_FILE_MODE;
	} // end constructor two

	public FileViewArrayAdapter(Context context) {
		// layout is 0 because we do it ourselves below
		// android.R.layout.select_dialog_singlechoice
		// would be the one to use normally.
		super(context, 0);
		mode = RECENT_FILE_MODE;
	} // end constructor two

	public void setMode(int m)
	{
		mode = m;
	}
	
	
	/****************************************************************
	 * getView
	 * 		the overridden getView method */
	public View getView(int position, View convertView, ViewGroup parent) 
	{		
		// update the text accordingly
		File f = new File(getItem(position));
		int imageid;
		
		if (f.isDirectory())
			imageid = R.drawable.fileicon_folder;
		else {
			
			String ext = getFileExtension(getItem(position));
			
			if (ext.equals("c"))
				imageid = R.drawable.fileicon_c;
			else if (ext.equals("cpp"))
				imageid = R.drawable.fileicon_cpp;
			else if (ext.equals("f"))
				imageid = R.drawable.fileicon_f;
			else if (ext.equals("h"))
				imageid = R.drawable.fileicon_h;
			else if (ext.equals("htm"))
				imageid = R.drawable.fileicon_htm;
			else if (ext.equals("html"))
				imageid = R.drawable.fileicon_html;
			else if (ext.equals("java"))
				imageid = R.drawable.fileicon_java;
			else if (ext.equals("pl"))
				imageid = R.drawable.fileicon_pl;
			else if (ext.equals("py"))
				imageid = R.drawable.fileicon_py;
			else if (ext.equals("tex"))
				imageid = R.drawable.fileicon_tex;
			else if (ext.equals("txt"))
				imageid = R.drawable.fileicon_txt;
			else
				imageid = R.drawable.fileicon_default;
		}

		// This really speeds things up. Because only the number of views displayed at one time
		// are actually inflated
		View textEntryView;
		if (convertView != null)
			textEntryView = convertView;
		else
			textEntryView = factory.inflate(R.layout.filebrowser_item, null);
		
		TextView tv = (TextView) textEntryView.findViewById(R.id.itemtext);
		tv.setText(getItem(position));

		ImageView iv = (ImageView) textEntryView.findViewById(R.id.itemimage);
		iv.setImageResource(imageid);

		if (mode == FILE_BROWSER_MODE)
		{
			Spannable text = sf.newSpannable(f.getName() + formatFileSize(f));
			text.setSpan(new AbsoluteSizeSpan(20), 0, f.getName().length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
			
			tv.setText(text);
		} else {	// default to RECENT_FILE_MODE
			Spannable text;
			if (f.getParent().toString().equals("/"))
				text = sf.newSpannable(f.getName() + "\n/");
			else 
				text = sf.newSpannable(f.getName() + "\n" + f.getParent() + "/");
			
			text.setSpan(new AbsoluteSizeSpan(20), 0, f.getName().length(), Spannable.SPAN_INCLUSIVE_EXCLUSIVE);	

			tv.setText(text);
		}
		
		return textEntryView;

	} // end getView()
	
	
	/****************************************************************
	 * getFileExtension */
	public static String getFileExtension(String f)
	{
		String ext = "";
		int i = f.lastIndexOf('.');
		if (i > 0 &&  i < f.length() - 1)
			ext = f.substring(i + 1).toLowerCase();
		
		return ext;
	} // getFileExtension()
	
	public static String formatFileSize(File file)
	{
		long size = file.length();
		
		if (file.isDirectory())
			return "";
		
		if (size < 0)
			return "\n0";
		else if (size == 1)
			return "\n1 Byte";
		else if (size < 2048)
			return "\n" + size + " Bytes";
		else if (size < 1024*1024*2)
			return "\n" + ((int) (size/1024)) + " KB";
		else 
			return "\n" + Math.round(100.0*size/(1024*1024))/100.0 + " MB";
	}
	
} // end class OpenRecentAdapter