Android Realizes Simple File Download and Upload

File download

/**
 *  Download service  IntentService 
 *  Life cycle: 
 * 1> When the first 1 Secondary startup IntentService When, Android Container 
 *   Will create IntentService Object. 
 * 2>IntentService Will round through the message queue in the worker thread, 
 *   Execute the business logic in each message object. 
 * 3> If there are still messages in the message queue, 
 *   If the message in the message queue has finished executing, 
 *  IntentService Will automatically destroy, execute onDestroy Method. 
 */
public class DownloadService extends IntentService{
  private static final int NOTIFICATION_ID = 100;
  public DownloadService(){
    super("download");
  }
  public DownloadService(String name) {
    super(name);
  }
  /**
   *  The code in this method will be executed in the worker thread 
   *  Whenever you call startService Start IntentService After that, 
   * IntentService Will put OnHandlerIntent In 
   *  Business logic is placed in a message queue to be executed. 
   *  When the worker thread rounds to the message object, the 
   *  Execute the method. 
   */
  protected void onHandleIntent(Intent intent) {
    // Send Http Request   Execute download service 
    //1.  Get the path of music 
    String url=intent.getStringExtra("url");
    String bit=intent.getStringExtra("bit");
    String title=intent.getStringExtra("title");
    //2.  Build File Object for saving music files 
    //   /mnt/sdcard/Music/_64/ Song title .mp3
    File targetFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MUSIC),"_"+bit+"/"+title+".mp3" );         
    if(targetFile.exists()){
      Log.i("info", " Music already exists ");
      return;
    }
    if(!targetFile.getParentFile().exists()){
      targetFile.getParentFile().mkdirs();
    }
    try {
      sendNotification(" Music begins to download ", " Music begins to download ");
      //3.  Send Http Request, get InputStream
      InputStream is = HttpUtils.getInputStream(url);
      //4.  Save while reading to File Object 
      FileOutputStream fos = new FileOutputStream(targetFile);
      byte[] buffer = new byte[1024*100];
      int length=0;
      int current = 0;
      int total = Integer.parseInt(intent.getStringExtra("total"));
      while((length=is.read(buffer)) != -1){
        fos.write(buffer, 0, length);
        fos.flush();
        current += length;
        // Notify the progress of the download 
        double progress = Math.floor(1000.0*current/total)/10;
        sendNotification(" Music begins to download ", " Download progress: "+progress+"%");
      }
      //5.  File download complete 
      fos.close();
      cancelNotification(); // Scroll message reappears 
      sendNotification(" Music download complete ", " Music download finished ");
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
  /**
   *  Send a notice 
   */
  public void sendNotification(String ticker, String text){
    NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    Notification.Builder builder = new Notification.Builder(this);
    builder.setSmallIcon(R.drawable.ic_launcher)
      .setContentTitle(" Music download ")
      .setContentText(text)
      .setTicker(ticker);
    Notification n = builder.build();
    manager.notify(NOTIFICATION_ID, n);
  }
  /**
   *  Cancellation notice 
   */
  public void cancelNotification(){
    NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    manager.cancel(NOTIFICATION_ID);
  }    
}

File upload

 /** 
   *  Upload a file  
   * @param uploadFile 
   */ 
  private void uploadFile(final File uploadFile) { 
    new Thread(new Runnable() {      
      @Override 
      public void run() { 
        try { 
          uploadbar.setMax((int)uploadFile.length()); 
          String souceid = logService.getBindId(uploadFile); 
          String head = "Content-Length="+ uploadFile.length() + ";filename="+ uploadFile.getName() + ";sourceid="+ 
            (souceid==null? "" : souceid)+"\r\n"; 
          Socket socket = new Socket("192.168.1.78",7878); 
          OutputStream outStream = socket.getOutputStream(); 
          outStream.write(head.getBytes()); 
          PushbackInputStream inStream = new PushbackInputStream(socket.getInputStream());   
          String response = StreamTool.readLine(inStream); 
          String[] items = response.split(";"); 
          String responseid = items[0].substring(items[0].indexOf("=")+1); 
          String position = items[1].substring(items[1].indexOf("=")+1); 
          if(souceid==null){// To represent that this file has not been uploaded before, add it to the database 1 Bar binding record  
            logService.save(responseid, uploadFile); 
          } 
          RandomAccessFile fileOutStream = new RandomAccessFile(uploadFile, "r"); 
          fileOutStream.seek(Integer.valueOf(position)); 
          byte[] buffer = new byte[1024]; 
          int len = -1; 
          int length = Integer.valueOf(position); 
          while(start&&(len = fileOutStream.read(buffer)) != -1){ 
            outStream.write(buffer, 0, len); 
            length += len; 
            Message msg = new Message(); 
            msg.getData().putInt("size", length); 
            handler.sendMessage(msg); 
          } 
          fileOutStream.close(); 
          outStream.close(); 
          inStream.close(); 
          socket.close(); 
          if(length==uploadFile.length()) logService.delete(uploadFile); 
        } catch (Exception e) { 
          e.printStackTrace(); 
        } 
      } 
    }).start(); 
  } 
} 

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