com.communipatient.amptedapp.data
Class DownloadImageTask

java.lang.Object
  android.os.AsyncTask<java.lang.String,java.lang.Integer,android.graphics.Bitmap>
      com.communipatient.amptedapp.data.DownloadImageTask

public class DownloadImageTask
extends android.os.AsyncTask<java.lang.String,java.lang.Integer,android.graphics.Bitmap>

The task that loads the image with the specified URL into the provided image view using a background task.

Nested Class Summary

Nested classes/interfaces inherited from class android.os.AsyncTask

android.os.AsyncTask.Status

Field Summary

private android.widget.ImageButton	button The button that will be displayed.
private android.widget.ImageView	image The image that will be displayed.

Constructor Summary

DownloadImageTask(android.widget.ImageButton button)
Initializes a new instance of the DownloadImageTask.

DownloadImageTask(android.widget.ImageView image)
Initializes a new instance of the DownloadImageTask.

Method Summary

protected android.graphics.Bitmap	doInBackground(java.lang.String... params) The backgrounds the requested image.
private static android.graphics.Bitmap	GetCachedFile(android.content.Context c, java.net.URL url) Load the image from the file cache if possible.
private static android.graphics.Bitmap	GetRemoteFile(java.net.URL url) Load the image from the remote URL.
protected void	onPostExecute(android.graphics.Bitmap result) Deal with the result.
protected void	onProgressUpdate(java.lang.Integer... progress) Update the background tasks.

Methods inherited from class android.os.AsyncTask

cancel, execute, get, get, getStatus, isCancelled, onCancelled, onPreExecute, publishProgress

Methods inherited from class java.lang.Object

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

Field Detail

image

private android.widget.ImageView image

The image that will be displayed.

button

private android.widget.ImageButton button

The button that will be displayed.

Constructor Detail

DownloadImageTask

public DownloadImageTask(android.widget.ImageView image)

Initializes a new instance of the DownloadImageTask.

Parameters:

image -

DownloadImageTask

public DownloadImageTask(android.widget.ImageButton button)

Initializes a new instance of the DownloadImageTask.

Parameters:

button - The image button to load the image into.

Method Detail

doInBackground

protected android.graphics.Bitmap doInBackground(java.lang.String... params)

The backgrounds the requested image.

Specified by:

doInBackground in class android.os.AsyncTask<java.lang.String,java.lang.Integer,android.graphics.Bitmap>

onProgressUpdate

protected void onProgressUpdate(java.lang.Integer... progress)

Update the background tasks. This is not used yet.

Overrides:

onProgressUpdate in class android.os.AsyncTask<java.lang.String,java.lang.Integer,android.graphics.Bitmap>

onPostExecute

protected void onPostExecute(android.graphics.Bitmap result)

Deal with the result.

Overrides:

onPostExecute in class android.os.AsyncTask<java.lang.String,java.lang.Integer,android.graphics.Bitmap>

GetCachedFile

private static android.graphics.Bitmap GetCachedFile(android.content.Context c,
                                                     java.net.URL url)

Load the image from the file cache if possible. If not available, download the image from the server and cache it locally. This method is synchronized because if the same image is requested multiple times it is downlaoded and cached multiple times. In the production release this will likely not be necessary since every image that is loaded on a single screen will be different.

Parameters:

c - The context which is used to get the file cache.

url - The URL of the remote image.

Returns:

The requested image.

GetRemoteFile

private static android.graphics.Bitmap GetRemoteFile(java.net.URL url)

Load the image from the remote URL.

Parameters:

url - The remote URL.

Returns:

The requested image.