Android Open Source - AndroidMooch Util

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License

The source code is released under:

Copyright (c) 2010 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 witho...

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Java Source Code

package com.github.stchris.util;
/*from w  ww  .j av a 2 s.co  m*/
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;

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

/**
 * Utility methods.
 * 
 * @author chris
 * 
 */
public abstract class Util {

  /**
   * Buffer size for copy operation.
   */
  private static final int IO_BUFFER_SIZE = 4 * 1024;

  /**
   * Tag used for logging.
   */
  private static final String TAG = "Util.loadBitmap";

  /**
   * Download an image from the given URL and store it in memory as a Bitmap.
   * 
   * @param url
   *            URL String
   * @return {@link Bitmap} the image
   */
  public static Bitmap loadBitmap(String url) {
    if (url == null || "".equals(url)) {
      return null;
    }
    Bitmap bitmap = null;
    InputStream in = null;
    BufferedOutputStream out = null;

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

      final ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
      out = new BufferedOutputStream(dataStream, IO_BUFFER_SIZE);
      copy(in, out);
      out.flush();

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

      bitmap = BitmapFactory.decodeByteArray(data, 0, data.length,
          options);
    } catch (IOException e) {
      Log.e(TAG, e.getMessage());
    } finally {
      try {
        if (in != null) {
          in.close();
        }
        if (out != null) {
          out.close();
        }
      } catch (IOException e) {
        Log.e(TAG, e.getMessage());
      }

    }

    return bitmap;
  }

  /**
   * Copy the contents of the {@link InputStream} to the given
   * {@link OutputStream}.
   * 
   * @param in
   *            {@link InputStream}
   * @param out
   *            {@link OutputStream}
   * @throws IOException
   *             copy fail
   */
  private static void copy(InputStream in, OutputStream out)
      throws IOException {
    byte[] b = new byte[IO_BUFFER_SIZE];
    int read;
    while ((read = in.read(b)) != -1) {
      out.write(b, 0, read);
    }
  }

}

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