android.webkit
Class DataLoader

java.lang.Object
  android.os.Handler
      android.webkit.StreamLoader
          android.webkit.DataLoader

 class DataLoader
extends StreamLoader

This class is a concrete implementation of StreamLoader that uses the content supplied as a URL as the source for the stream. The mimetype optionally provided in the URL is extracted and inserted into the HTTP response headers.

Field Summary

Fields inherited from class android.webkit.StreamLoader

mContentLength, mDataStream, mHandler, NO_STORE

Constructor Summary

DataLoader(String dataUrl, LoadListener loadListener)
Constructor uses the dataURL as the source for an InputStream

Method Summary

protected void	buildHeaders(Headers headers) This method is called when the headers are about to be sent to the load framework.
static void	requestUrl(String url, LoadListener loadListener) Construct a DataLoader and instruct it to start loading.
protected boolean	setupStreamAndSendStatus() This method is called when the derived class should setup mDataStream, and call mHandler.status() to indicate that the load can occur.

Methods inherited from class android.webkit.StreamLoader

handleMessage, load

Methods inherited from class android.os.Handler

dispatchMessage, dump, getLooper, hasMessages, hasMessages, obtainMessage, obtainMessage, obtainMessage, obtainMessage, obtainMessage, post, postAtFrontOfQueue, postAtTime, postAtTime, postDelayed, removeCallbacks, removeCallbacks, removeCallbacksAndMessages, removeMessages, removeMessages, sendEmptyMessage, sendEmptyMessageAtTime, sendEmptyMessageDelayed, sendMessage, sendMessageAtFrontOfQueue, sendMessageAtTime, sendMessageDelayed, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

DataLoader

DataLoader(String dataUrl,
           LoadListener loadListener)

Constructor uses the dataURL as the source for an InputStream

Parameters:

dataUrl - data: URL string optionally containing a mimetype

loadListener - LoadListener to pass the content to

Method Detail

setupStreamAndSendStatus

protected boolean setupStreamAndSendStatus()

Description copied from class: StreamLoader

This method is called when the derived class should setup mDataStream, and call mHandler.status() to indicate that the load can occur. If it fails to setup, it should still call status() with the error code.

Specified by:

setupStreamAndSendStatus in class StreamLoader

Returns:

true if stream was successfully setup

buildHeaders

protected void buildHeaders(Headers headers)

Description copied from class: StreamLoader

This method is called when the headers are about to be sent to the load framework. The derived class has the opportunity to add addition headers.

Specified by:

buildHeaders in class StreamLoader

Parameters:

headers - Map of HTTP headers that will be sent to the loader.

requestUrl

public static void requestUrl(String url,
                              LoadListener loadListener)

Construct a DataLoader and instruct it to start loading.

Parameters:

url - data: URL string optionally containing a mimetype

loadListener - LoadListener to pass the content to