In an android app how to download a blob from google appengine [duplicate]

manpreet Best Answer 2 years ago

_x000D_ OK I got it through trial and error using using an HttpClient & an HttpGet. private boolean downloadFile(String query) { Log.d(TAG, "trying to download file"); boolean downloadSuccessful = false; if(!fileName.endsWith(".zip")) { fileName += ".zip"; Log.d(TAG, "added zip to file name"); } is = null; bis = null; fos = null; bos = null; outFile = null; int counter = 0; while(!downloadSuccessful && counter < 5) { Log.d(TAG + ".downloadFile()", "attempt number: " + counter); try { //connect(query); HttpClient client = new DefaultHttpClient(); HttpGet httpGet = new HttpGet(query); HttpResponse response = null; try { response = client.execute(httpGet); StatusLine statusLine = response.getStatusLine(); int statusCode = statusLine.getStatusCode(); Log.d(TAG, "statusCode: " + statusCode); if (statusCode == 200) { HttpEntity entity = response.getEntity(); is = entity.getContent(); bis = new BufferedInputStream(is); } else { Log.e(TAG, "Failed to download file"); } } catch (ClientProtocolException e) { Log.e(TAG, e.getMessage()); } catch (IOException e) { Log.e(TAG, e.getMessage()); } Header[] hs = response.getAllHeaders(); if(hs == null) { Log.e(TAG, "Headers are null "); return false; } for(Header h: hs) { Log.d(TAG, "Header values: " + h.getValue()); } fileSize = 200000; if(counter == 0) { Log.e(TAG, "File size is: " + fileSize); } else { Log.e(TAG, "This is what's left to download: " + fileSize); } sendNotifiction("Connecting", "Connecting...", "Spice bundle: " + fileName); updateUser(MESSAGE_CONNECTING_STARTED, fileSize / 1024); outFile = new File(ZIP_LOCATION + "/" + fileName); fos = new FileOutputStream(outFile); bos = new BufferedOutputStream(fos, DOWNLOAD_BUFFER_SIZE); data = new byte[DOWNLOAD_BUFFER_SIZE]; bytesRead = 0; totalRead = 0; downloadSuccessful = download(); Log.d(TAG, "Total bytes Read: " + totalRead + " of: " + fileSize); if(totalRead == fileSize) { downloadSuccessful = true; Log.e(TAG, "Download successful use this message wairily"); } else { Log.e(TAG, "Download fubar"); } } catch(FileNotFoundException e) { Log.e(TAG, "FileNotFoundException: " + e.getMessage()); notificationFlash = "Error downloading"; notificationTitle = "Error"; notificationText = "Spice bundle: " + fileName; sendNotifiction(notificationFlash, notificationTitle, notificationText); updateUser(MESSAGE_DOWNLOAD_ERROR, 0); } catch(NullPointerException e) { Log.e(TAG, "NullPointerException"); } catch(IllegalStateException e) { Log.e(TAG, e.getMessage()); } catch(Exception e) { Log.e(TAG, "Exception: " + e.getMessage()); notificationFlash = "Error downloading"; notificationTitle = "Error"; notificationText = "Spice bundle: " + fileName; sendNotifiction(notificationFlash, notificationTitle, notificationText); updateUser(MESSAGE_DOWNLOAD_ERROR, 0); } counter++; } try { if(bos != null) { bos.close(); } if(fos != null) { fos.close(); } if(bis != null) { bis.close(); } if(is != null) { is.close(); } } catch (IOException e) { Log.e(TAG + " given up downloading", "IOException thrown"); notificationFlash = "Error downloading"; notificationTitle = "Error"; notificationText = "Spice bundle: " + fileName; sendNotifiction(notificationFlash, notificationTitle, notificationText); updateUser(MESSAGE_DOWNLOAD_ERROR, 0); } return downloadSuccessful; } private boolean download() { boolean downloadComplete = false; try { while(!this.isCancelled()) { bytesRead = bis.read(data, 0, data.length); if( bytesRead < 0) { downloadComplete = true; break; } bos.write(data, 0, bytesRead); totalRead += bytesRead; int totalReadInKB = totalRead / 1024; if(totalReadInKB % 100 == 0) { Log.d(TAG, "Total Read In KB: " + totalReadInKB + " of: " + fileSize/1024); updateUser(MESSAGE_UPDATE_PROGRESS_BAR, totalReadInKB); } } } catch(IOException e) { Log.e(TAG + ".download()", e.getMessage()); Log.e(TAG + ".download()", "IOException thrown download incomplete"); } finally { try { bos.flush(); } catch (IOException e) { Log.e(TAG + ".download()", e.getMessage()); Log.e(TAG + ".download()", "IOException thrown couldn't flush"); } } return downloadComplete; }