ขอคำแนะนำเกี่ยวกับ android resume download หน่อยคับ

				    byte data[] = new byte[1024];
				    long total = 0;
				
				        while ((count = input.read(data)) != -1) {
				            total += count;
				            Status = (int)((total*100)/lenghtOfFile);
				            output.write(data, 0, count);
				            
				            // Update ProgressBar
							handler.post(new Runnable() {
								public void run() {
									updateStatus(position,Status);	
								}
							});
							
				        }
				
				        output.flush();
				        output.close();
				        input.close(); 
				        
				    } catch (Exception e) {}