com.nostra13.universalimageloader.core.download
Class ImageDownloader

java.lang.Object
  com.nostra13.universalimageloader.core.download.ImageDownloader

Direct Known Subclasses:

HttpClientImageDownloader, URLConnectionImageDownloader

public abstract class ImageDownloader
extends Object

Provides retrieving of InputStream of image by URI.

Author:

Sergey Tarasevich (nostra13[at]gmail[dot]com)

Field Summary

protected static int	BUFFER_SIZE
protected static String	PROTOCOL_FILE
protected static String	PROTOCOL_FTP
protected static String	PROTOCOL_HTTP
protected static String	PROTOCOL_HTTPS

Constructor Summary

ImageDownloader()

Method Summary

InputStream	getStream(URI imageUri) Retrieves InputStream of image by URI.
protected InputStream	getStreamFromFile(URI imageUri) Retrieves InputStream of image by URI (image is located on the local file system or SD card)
protected abstract InputStream	getStreamFromNetwork(URI imageUri) Retrieves InputStream of image by URI (image is located in the network)
protected InputStream	getStreamFromOtherSource(URI imageUri) Retrieves InputStream of image by URI from other source.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PROTOCOL_FILE

protected static final String PROTOCOL_FILE

See Also:

Constant Field Values

PROTOCOL_HTTP

protected static final String PROTOCOL_HTTP

See Also:

Constant Field Values

PROTOCOL_HTTPS

protected static final String PROTOCOL_HTTPS

See Also:

Constant Field Values

PROTOCOL_FTP

protected static final String PROTOCOL_FTP

See Also:

Constant Field Values

BUFFER_SIZE

protected static final int BUFFER_SIZE

See Also:

Constant Field Values

Constructor Detail

ImageDownloader

public ImageDownloader()

Method Detail

getStream

public InputStream getStream(URI imageUri)
                      throws IOException

Retrieves InputStream of image by URI. Image can be located as in the network and on local file system.

Throws:

IOException

getStreamFromOtherSource

protected InputStream getStreamFromOtherSource(URI imageUri)
                                        throws IOException

Retrieves InputStream of image by URI from other source. Should be overriden by successors to implement image downloading from special sources (not local file and not web URL).

Throws:

IOException

getStreamFromNetwork

protected abstract InputStream getStreamFromNetwork(URI imageUri)
                                             throws IOException

Retrieves InputStream of image by URI (image is located in the network)

Throws:

IOException

getStreamFromFile

protected InputStream getStreamFromFile(URI imageUri)
                                 throws IOException

Retrieves InputStream of image by URI (image is located on the local file system or SD card)

Throws:

IOException