Android Open Source - filemanager File Icon Resolver

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License

The source code is released under:

MIT License

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Java Source Code

/*******************************************************************************
 * Copyright (c) 2014 Michal Dabski/*from   ww  w. j  a v  a2 s. c  o m*/
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 ******************************************************************************/
package com.michaldabski.utils;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.LruCache;

import com.michaldabski.filemanager.R;

import java.io.File;

public class FileIconResolver extends LruCache<String, Bitmap>
{  
  public static final int CACHE_SIZE = 5 * 1024 * 1024;
  final Context context;
  Bitmap nullIcon=null;
  
  public FileIconResolver(Context context)
  {
    super(CACHE_SIZE);
    this.context = context;
  }
  
  @Override
  protected int sizeOf(String key, Bitmap value)
  {
    return value.getByteCount();
  }
  
  public Bitmap getNullIcon()
  {
    if (nullIcon == null)
      nullIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.icon_file);
    return nullIcon;
  }
  
  public Bitmap getFileIcon(File file)
  {
    String mimeType = FileUtils.getFileMimeType(file);
    if (mimeType == null) return getNullIcon();
    
    Bitmap bitmap = super.get(mimeType);
    if (bitmap == null)
      bitmap = FileUtils.createFileIcon(file, context, false);
    put(mimeType, bitmap);
    return bitmap;
  }
}

Java Source Code List