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Android boot file from memory

I am trying to download a zip file that is less than 22 MB on startup. After these exceptions, I changed the default BufferedInputStream value, but still get the error from memory.

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); } }

stack:

 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.

EDIT: Well, I managed to get this example , but even with the correct permissions, I got a permission denial:

 `10-2`8 11:33:15.478: WARN/System.err(1781): java.io.FileNotFoundException: /mnt/sdcard/testDirectory/Samples.zip (Permission denied)
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3 answers

No wonder you're trying to create 22 MB bytearray in your phone RAM; Most Android phones do not have much RAM. What you want to do is transfer the file to an SD card or internal memory:

 // untested final int BUFFER_SIZE = 23 * 1024; InputStream is = ucon.getInputStream(); BufferedInputStream bis = new BufferedInputStream(is, BUFFER_SIZE); FileOutputStream fos = new FileOutputStream(file); byte[] baf = new byte[BUFFER_SIZE]; int actual = 0; while (actual != -1) { fos.write(baf, 0, actual) actual = bis.read(baf, 0, BUFFER_SIZE); } fos.close();
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Below is a small method for loading large files checked by Leah Ryan (thanks to him) using FileOutputStream to FileOutputStream buffer.

 public void DownloadFromUrl(String fileURL, String fileName) { //this is the downloader method try { URL url = new URL( fileURL); File file = new File(fileName); file.createNewFile(); long startTime = System.currentTimeMillis(); Log.d("DownloadManager", "download begining"); Log.d("DownloadManager", "download url:" + url); Log.d("DownloadManager", "downloaded file name:" + fileName); /* Open a connection to that URL. */ URLConnection ucon = url.openConnection(); /* * Define InputStreams to read from the URLConnection. */ InputStream is = ucon.getInputStream(); /* * Read bytes to the Buffer until there is nothing more to read(-1) and write on the fly in the file. */ FileOutputStream fos = new FileOutputStream(file); final int BUFFER_SIZE = 23 * 1024; BufferedInputStream bis = new BufferedInputStream(is, BUFFER_SIZE); byte[] baf = new byte[BUFFER_SIZE]; int actual = 0; while (actual != -1) { fos.write(baf, 0, actual); actual = bis.read(baf, 0, BUFFER_SIZE); } fos.close(); Log.d("DownloadManager", "download ready in" + ((System.currentTimeMillis() - startTime) / 1000) + " sec"); } catch (IOException e) { Log.d("DownloadManager", "Error: " + e); } }
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Why are you using ByteArrayBuffer? This is a problem, you are trying to save 22 MB in it.

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