Downloader

```
public interface Downloader

                    
```
A mechanism to download files from network. It's easy to use custom downloader by implementing this interface, and then set it in DownloadManager.

Method Summary

Modifier and Type	Method	Description
`abstract String`	`detectFilename(Uri uri)`	Detect filename from http header/url if existed.
`abstract Integer`	`start(Uri uri, Long breakpoint)`	Init downloader and start to download.
`abstract Long`	`contentLength()`	Get content length for current uri.
`abstract InputStream`	`byteStream()`	Get input stream supported by downloader.
`abstract Unit`	`close()`	Close downloader and stop downloader.
`abstract Downloader`	`copy()`	Make a copy for this downloader.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - detectFilename
```
 abstract String detectFilename(Uri uri)
```
    Detect filename from http header/url if existed.
    
    Parameters:
    
    uri - uri to detect filename
  - start
```
 abstract Integer start(Uri uri, Long breakpoint)
```
    Init downloader and start to download. The downloader should handle redirect status code, such as 301, 302 and so on.
    
    Parameters:
    
    uri - Uri
    
    breakpoint - breakpoint if exists
  - contentLength
```
 abstract Long contentLength()
```
    Get content length for current uri.
  - byteStream
```
 abstract InputStream byteStream()
```
    Get input stream supported by downloader.
  - close
```
 abstract Unit close()
```
    Close downloader and stop downloader.
  - copy
```
 abstract Downloader copy()
```
    Make a copy for this downloader.