title: Android download file out of memory woes
body: <p>I am trying to download a zip file that is just less than 22 mb on start.  I changed the default BufferedInputStream after these exceptions, but still get an out of memory error.</p>
  
  <pre><code>public void downloadFromUrl(String fileName) {
  
          //avoid unknown host exception
          try {
  
              InetAddress i = InetAddress
  
                      .getByName("http://xxx/Android/" + fileName);
  
          } catch (UnknownHostException e1) {
  
              e1.printStackTrace();
  
          }
  
          try {
  
              URL url = new URL("http://xxx/Android/" + fileName);
              File file = new File(fileName);
  
              long startTime = System.currentTimeMillis();
              Log.d("DownloadManager", "download begining");
              Log.d("DownloadManager", "download url:" + url);
              Log.d("DownloadManager", "downloaded file name:" + fileName);
  
              URLConnection ucon = url.openConnection();
  
              InputStream is = ucon.getInputStream();
              BufferedInputStream bis = new BufferedInputStream(is, 23 * 1024);
  
              ByteArrayBuffer baf = new ByteArrayBuffer(23 * 1024);
              int current = 0;
              while ((current = bis.read()) != -1) {
  
                  baf.append((byte) current);
  
              }
  
              FileOutputStream fos = new FileOutputStream(file);
              fos.write(baf.toByteArray());
              fos.close();
              Log.d("DownloadManager",
                      "download ready in"
                              + ((System.currentTimeMillis() - startTime) / 1000)
                              + " sec");
  
          } catch (IOException e) {
  
              Log.d("DownloadManager", "Error: " + e);
  
          }
  
      }
  </code></pre>
  
  <p>stack:</p>
  
  <pre><code>10-28 10:18:16.885: DEBUG/ImageManager(1804): download begining
  10-28 10:18:16.885: DEBUG/ImageManager(1804): download url:http://xxx/Android/Samples.zip
  10-28 10:18:16.885: DEBUG/ImageManager(1804): downloaded file name:Samples.zip
  10-28 10:18:17.204: INFO/global(1804): Default buffer size used in BufferedInputStream constructor. It would be better to be explicit if an 8k buffer is required.
  10-28 10:18:17.845: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 1803 objects / 185168 bytes in 96ms
  10-28 10:18:18.415: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 229 objects / 105296 bytes in 78ms
  10-28 10:18:18.425: INFO/dalvikvm-heap(1804): Grow heap (frag case) to 3.184MB for 376848-byte allocation
  10-28 10:18:18.545: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 0 objects / 0 bytes in 109ms
  10-28 10:18:20.555: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 44 objects / 190080 bytes in 65ms
  10-28 10:18:20.575: INFO/dalvikvm-heap(1804): Grow heap (frag case) to 3.721MB for 753680-byte allocation
  10-28 10:18:20.675: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 0 objects / 0 bytes in 95ms
  10-28 10:18:22.725: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 3 objects / 376904 bytes in 66ms
  10-28 10:18:23.145: INFO/dalvikvm-heap(1804): Grow heap (frag case) to 4.799MB for 1507344-byte allocation
  10-28 10:18:23.245: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 0 objects / 0 bytes in 95ms
  10-28 10:18:25.415: WARN/ActivityManager(59): Launch timeout has expired, giving up wake lock!
  10-28 10:18:26.205: WARN/ActivityManager(59): Activity idle timeout for HistoryRecord{43ef1378 com.xxx.xxxe/.TabViewMain}
  10-28 10:18:27.995: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 3 objects / 753736 bytes in 65ms
  10-28 10:18:28.655: INFO/dalvikvm-heap(1804): Grow heap (frag case) to 6.956MB for 3014672-byte allocation
  10-28 10:18:28.765: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 0 objects / 0 bytes in 102ms
  10-28 10:18:33.275: DEBUG/dalvikvm(123): GC_EXPLICIT freed 833 objects / 48984 bytes in 2059ms
  10-28 10:18:37.275: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 3 objects / 1507400 bytes in 69ms
  10-28 10:18:38.115: INFO/dalvikvm-heap(1804): Grow heap (frag case) to 11.268MB for 6029328-byte allocation
  10-28 10:18:38.275: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 0 objects / 0 bytes in 151ms
  10-28 10:18:53.885: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 3 objects / 3014728 bytes in 70ms
  10-28 10:18:53.895: INFO/dalvikvm-heap(1804): Forcing collection of SoftReferences for 12058640-byte allocation
  10-28 10:18:54.055: DEBUG/dalvikvm(1804): GC_FOR_MALLOC freed 0 objects / 0 bytes in 158ms
  10-28 10:18:54.055: ERROR/dalvikvm-heap(1804): Out of memory on a 12058640-byte allocation.
  </code></pre>
  
  <p>EDIT:  Ok, I was able to get <a href="https://stackoverflow.com/questions/2121833/permission-to-write-to-the-sd-card">this example</a> working, but even with the correct permissions, I get a permission denied error: </p>
  
  <pre><code>`10-2`8 11:33:15.478: WARN/System.err(1781): java.io.FileNotFoundException: /mnt/sdcard/testDirectory/Samples.zip (Permission denied)
  </code></pre>