/** Factory method that returns an explicit Intent for downloading an image. */
public static Intent makeIntent(
Context context, int requestCode, Uri url, Uri directoryPathname, Handler downloadHandler) {
// Create an intent that will download the image from the web.
// TODO -x- you fill in here, replacing "null" with the proper
// code, which involves (1) creating a RequestMessage
// containing the various parameters passed into this method
// and (2) storing this RequestMessage as a Message "extra" in
// the Intent.
RequestMessage requestMessage =
RequestMessage.makeRequestMessage(
requestCode, url, directoryPathname, new Messenger(downloadHandler));
Intent intent = new Intent(context, DownloadImagesStartedService.class);
intent.putExtra(REQUEST_MESSAGE, requestMessage.getMessage());
return intent;
}
/** Send the @a pathToImageFile back to the ImageModelImp's Handler via the @a Messenger. */
private void sendPath(Messenger messenger, Uri pathToImageFile, Uri url, int requestCode) {
// Call the makeReplyMessage() factory method to create
// Message.
// TODO -x- you fill in here.
RequestMessage requestMessage =
RequestMessage.makeRequestMessage(requestCode, url, pathToImageFile, messenger);
try {
// Send the path to the image file back to the
// ImageModelImpl's Handler via the Messenger.
// TODO -x- you fill in here.
requestMessage.getMessenger().send(requestMessage.getMessage());
} catch (RemoteException e) {
Log.e(getClass().getName(), "Exception while sending reply message back to Activity.", e);
}
}
/**
* Hook method dispatched by the IntentService framework to download the image requested via data
* in an intent, store the image in a local file on the local device, and return the image file's
* URI back to the ImageModelImpl's Handler via the Messenger passed with the intent.
*/
@Override
public void onHandleIntent(Intent intent) {
// Extract the RequestMessage from the intent.
final RequestMessage requestMessage =
RequestMessage.makeRequestMessage((Message) intent.getParcelableExtra(REQUEST_MESSAGE));
// Extract the URL for the image to download.
// TODO -x- you fill in here.
Uri uri = requestMessage.getImageURL();
// Download the requested image.
// TODO -x??- you fill in here.
Uri path = requestMessage.getDirectoryPathname();
// Extract the request code.
// TODO -x- you fill in here.
int requestCode = requestMessage.getRequestCode();
// Extract the Messenger stored as an extra in the
// intent under the key MESSENGER.
// TODO -x- you fill in here.
Messenger messenger = requestMessage.getMessenger();
// Send the path to the image file back to the
// MainActivity via the messenger.
// TODO -x- you fill in here.
sendPath(messenger, path, uri, requestCode);
}