Bitmap downloading, processing : Bitmap « 2D Graphics « Android






  1. Android
  2. 2D Graphics
  3. Bitmap

Bitmap downloading, processing

    

/* 
* Copyright 2011 Dmitry S. Vorobiev
*
*   Licensed under the Apache License, Version 2.0 (the "License");
*   you may not use this file except in compliance with the License.
*   You may obtain a copy of the License at
*
*       http://www.apache.org/licenses/LICENSE-2.0
*
*   Unless required by applicable law or agreed to in writing, software
*   distributed under the License is distributed on an "AS IS" BASIS,
*   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*   See the License for the specific language governing permissions and
*   limitations under the License.
*/

//package com.litecoding.classkit.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;

/**
 * This class contains utils for Bitmap downloading, processing etc.
 * 
 * @author Dmitry S. Vorobiev
 *
 */
public class BitmapUtils
{
  public static int IO_BUFFER_SIZE = 1024 * 1024;
  
  /**
   * Downloads image and creates a Bitmap object
   * @param url URL of image to be downloaded 
   * @return downloaded bitmap or null if error occurred
   */
  public static Bitmap loadBitmapFromUrl(String url)
  {
      Bitmap bitmap = null;
      
      try
      {
        bitmap = loadBitmapFromUrl(new URL(url));
      }
      catch(Exception e)
      {

      }
      
      return bitmap;
  }
  
  /**
   * Downloads image and creates a Bitmap object
   * @param url URL of image to be downloaded 
   * @return downloaded bitmap or null if error occurred
   */
  public static Bitmap loadBitmapFromUrl(URL url)
  {
    Bitmap bitmap = null;
      InputStream in = null;
      BufferedOutputStream out = null;

      try {
          in = new BufferedInputStream(url.openStream(), IO_BUFFER_SIZE);

          final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
          out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
          
          byte[] buf = new byte[1024];
          while(in.available() > 0)
          {
            int cntBytes = in.read(buf);
            out.write(buf, 0, cntBytes);
          }
          out.flush();

          final byte[] data = dataStream.toByteArray();
          BitmapFactory.Options options = new BitmapFactory.Options();
          //options.inSampleSize = 1;

          bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,options);
      }
      catch (IOException e)
      {

      }
      finally
      {
        try
        {
          in.close();        
          out.close();
        }
        catch(IOException e)
        {

        }
      }

      return bitmap;
  }

}








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