The MyLog function in serverMain. The function as MyLog functionName, tag, msg You will see the debug output in the spreadsheet you created. Please note that having MyLog will significantly slow down your app. So, make sure to comment out or remove MyLog calls in a production settings.
Often times we will need to upload images to the web, to be later consumed by other users. In order to provide an easy and quick way for App Inventor users, we have enhanced an existing component to store and retrieve pictures from the web. These pictures will not be available to the public.
The following tutorial will cover common steps required to store and retrieve a picture from the web: Use the TinyWebDB "StorePicture" method with a picture path as the parameter obtained either from ImagePicker or Camera , plus an optional tag parameter When the picture has been stored, the TinyWebDB "PictureStored" event is raised with a picture UUID universally unique identifier as a parameter, this UUID can be used to retrieve the picture from the web later.
The TinyWebDB "GotPicture" event will be raised whenever the picture is received, along with the picture there is also the optional tag and other information. Display Linked Data on a Map currently not working Please make sure you have completed Tutorials 1 and 13 before attempting this. Populate a List Picker Dynamically Please make sure you have completed Tutorial 1 before attempting this.
Construct a Form The Linked Data Form is an App Inventor layout component that can be used by developers to identify a collection of fields that should be applied to a particular ontological concept. The components to model the above scenario appear as follows in the designer view:. The names we have used for the respective components are as follows:.
We will include some non-visible components such as the LinkedData and LocationSensors. LinkedData is used to serialize the form into triples and write them to storage. LinkedData2 is used for reading those triples from a file in storage. LocationSensor is used for obtaining the latitude and longitude of the user's current location. This is how to enable the LocationSensor and populate the latitude and longitude textboxes.
Also, notice how we have initialized the blocks used to express the relationships in the form. You may alternatively set these properties in the designer view. Also, note that it takes some time for the LocationSensor to get activated. You might also want to add some error handling blocks as follows. Send a message from a phone Please make sure you have completed Tutorial 14 before attempting this.
Another possible app is one that alerts its users when more than thousands of people are tweeting an nearby and upcoming snowstorm. The push notification service is good at cutting through the noise and delivering the useful information to the hands of the people that want it. For example, field workers who use a disaster relief app might want to be notifid when the specific kinds of resources has arrived. Local volunteers who use MatchApp want to know when some people are in need that they can offer help.
With push notification, an app can always delievers messages to people directly to update the most recent situation. Punya makes it easy for apps to use LD-based push notification to send up-to-dates information. The sensor components provides many high-level components for access to smartphone sensors and personal information. For example, it has components for reading the GPS location, taking photos with the camera, receiving SMS texts, and sending Twitter messages.
To try Punya, log into our Punya instance with a Google account. Then import the applications below. In these videos, we will show you how to create and use our featured app, WeReport.
The report can contain a photo taken by the user and a short description describing what is going on. On the other hand, a user can also subscribe to the topics of events that they are interested.
Whenever an event was reported by the crowd, those who subscribe to a specific topic that matched the event will receive an alert through push notificaitons according to their current location. For example, if a voluntary relief worker wants to know when there are power outage reported in the community and offer helps just in time. Furthermore, you will also learn how to modify WeReport app to meet your needs. Maybe you want to build a traffic accident report app, or maybe you want to build an app that reports live events happening in a country fair!
With a few changes in the blocks, you can have your own app! Shih, F. ContextProbe: Exploring mobile privacy in context. Laratta, C. Roy, P. Loseto, G. Kinkead, L. In: Proc. Workshop on Mobile Deployment of Semantic Technol. We require the challenge participants to provide:. If the app developers have extended Punya features for their app, they must make the software open source under the Apache 2.
It is preferred if the data used to demonstrate the app is publicly made available, but at the very least, the data must be available to the challenge organizers and judges.
The challenge timeline is composed of the following tasks. We will require all participants to check-in a month before the deadline to make sure their development efforts are in line with the challenge expectations. We strongly recommend that you submit your application ideas by 30 June You can include your preliminary.
After which, the challenge organizers will give feedback on your application idea, and provide any necessary technical guidance on Punya. This material will help guide participants through the use of Punya for building complex and intelligent mobile apps, as it outlines the use of the Punya Linked Data components in real-world scenarios. Mobile apps developed as part of this challenge may leverage existing online Linked Data e.
According to the ISWC material, Punya also includes the following built-in tutorials for learning how to build Linked Data-aware mobile apps:.
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