Android Open Source - Text-Edit-for-Android File View Array Adapter

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License

The source code is released under:

GNU General Public License

Java Source Code

package org.paulmach.textedit;
/*from w w w  .j  a  v  a  2 s .  c  om*/
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

Java Source Code List

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