How to download a file from the server

Question

I have a question with the overall implementation of the design. Hope someone more qualified than me helps me.

I want to make an application based on android client and java server. Local Wi-Fi, 3G.

Basically, the client should connect to the server and request the download of the file using the code.

How can i do this?

Things I know:

• I have to create a background thread in the client to create the file on the SD card and update the progress bar using Handler to communicate with the user interface thread.
  
  
• The server must be multithreaded and non-blocking.
  
  
• A file is a binary file such as mp3 audio. Therefore, the server should:
  
  
  • Send file information: name and total length.
  • Open the file, read and send the bytes until it reaches the end.
    
    
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Answer 1

, , mp3 ?

Java, URL.openStream();

http://download.oracle.com/javase/tutorial/networking/urls/readingURL.html

System.out. .

FileOutputStream fos = new FileOutputStreamm(new File("path_to_file.mp3");
int byte;

while ((byte= in.readLine()) != -1)
    fos.write(byte);

? , . http-, (Tomcat oder Apache HTTPD). HTTP.

Java-, Servlet WAR -File:

http://docstore.mik.ua/orelly/java-ent/servlet/