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When the user has populated the required fields and hits the Save button, you need to not only save the data via the SiteMonitorModel class but also let the AppWidget infrastructure know that you ve affirmed the creation of this widget instance. This takes place by using the Activity s setResult method along with an Intent containing an extra indicating the widget number. In addition you want to ensure that the alarm is enabled for future updates. Finally, you really don t want to wait until the next alarm interval elapses; you want to get an update now. The following listing demonstrates how to accomplish each of these tasks.

Figure 4-1

require "http://otherservercom/functionsphp";

public void onClick(View v) { switch (v.getId()) { Save data case R.id.btnSaveSite: { Update saveInfo(); widget s UI // update the widget's display SiteMonitorWidgetImpl.UpdateOneWidget(v.getContext(), widgetId);

// let the widget provider know we're done and happy Intent ret = new Intent(); ret.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,widgetId); setResult(Activity.RESULT_OK,ret); // let's ask for an update and also enable the alarm Intent askForUpdate = Set alarm new Intent(SiteMonitorBootstrap.ALARM_ACTION); this.sendBroadcast(askForUpdate); SiteMonitorBootstrap.setAlarm(this); finish(); } break; Save data case R.id.btnVisitSite: { saveInfo(); Intent visitSite = new Intent(Intent.ACTION_VIEW); visitSite.setData(Uri.parse(smm.getHomepageUrl())); startActivity(visitSite); } break; } }

Figure 4-2

However, you must be aware that if you can include such a program file over the Web, then so can anyone else, meaning they can also view its contents, which creates a potential security risk It s much better to make sure you store all PHP files you will be needing on your own server It also means that if the other site is ever down, your program will not be affected

When the user clicks the Save button (or the Visit Site button), the widget-specific data is saved B. There s nothing fancy there just a call to SiteMonitorModel.saveWidgetData(). The AppWidget subsystem is supposed to update the UI of the widget after the Configuration dialog box completes successfully, but experience shows that this isn t always the case. Therefore a call is made to SiteMonitorWidgetImpl.UpdateOneWidget with the newly created widgetId C.

be aware that such a file is at the control of the remote server s administrator and, if that s not you, then it could be changed or compromised at any time without your say so

Figure 4-3

An important step in the life of a new AppWidget is to be sure to set the Activity result to RESULT_OK D, passing along an Intent extra that identifies the new widget by number. At this point our new widget is populated with a name and no meaningful status information. To force an update, you broadcast an Intent that simulates the condition where the alarm has just triggered E. You also want to ensure that the alarm is armed for a subsequent operation, so you call SiteMonitorBootstrap.setAlarm F. In the event that the Visit Site button is clicked, you want to take the user to the defined home page of the currently active site being monitored by the widget G. The last condition to handle is the case where the widget has been selected from the Add New Widget list on the home screen when the user cancels out of the configuration activity. In this case the widget shouldn t be created. To achieve this result, you set the result of the Activity to RESULT_CANCELED as shown in this listing.

Now that you have a means to easily include the plug-ins in this book within your programs, you re all set to go The remaining chapters explain how they work (so you can modify them as necessary), and how to use them, and provides plenty of examples A handy breakdown of all variables, arrays, and functions used by each is also included

public void onDestroy() { super.onDestroy(); if (!isFinishing()) { Intent ret = new Intent(); ret.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,widgetId); setResult(Activity.RESULT_CANCELED,ret); }

Figure 4-4

function PIPHP_SearchGoogleBooks($search, $start, $count, $type) { $results = array(); $url = 'http://booksgooglecom/books/feeds/volumes ' 'q=' rawurlencode($search) '&start-index=' "$start&max-results=$count&min-viewability=" "$type"; $xml = @file_get_contents($url); if (!strlen($xml)) return array(FALSE); $xml = str_replace('dc:', 'dc', $xml); $sxml = simplexml_load_string($xml); foreach($sxml->entry as $item) { $title = $item->title; $author = $item->dccreator; $pub = $item->dcpublisher; $date = $item->dcdate; $desc = $item->dcdescription; $thumb = $item->link[0]['href']; $info = $item->link[1]['href']; $preview = $item->link[2]['href']; if (!strlen($pub)) $pub = $author; if ($preview == 'http://wwwgooglecom/books/feeds/users/me/volumes') $preview = FALSE; if (!strlen($desc)) $desc = '(No description)'; if (!strstr($thumb, '&sig=')) $thumb = 'http://booksgooglecom/googlebooks/' 'images/no_cover_thumbgif'; $results[] = array($title, $author, $pub, $date, $desc, $thumb, $info, $preview); } return array(count($results), $results); }