I'm writing a JavaScript based Android application (using PhoneGap) to track patients' compliance with their medical regimen. This requires the app to run in the background and remind the patients at specified times to take their medication. Since PhoneGap based apps do not run in the background, I was wondering if I could remotely start the app on the patients' phones (assuming I have their permission, of course) using NodeJS (which I'm using for this app anyway - to gather the compliance data).
Alternately, I was wondering whether I could trigger a dialog box on the mobile phone remotely using NodeJS.
I'm sorry if these questions sound silly... I'm new to this stuff.
Thanks in advance.
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I'm wondering it's possible to identify android device by web app running on mobile web browser? And this solution have to still working after change or upgrade web browser on this phone.
My second doubt is web app can working offline on phone showing PDF presentations saved in local storage (disk). When I have internet connection I can manually sync presentations (some are removed and some are downloaded).
If PWA app can work like I described above or in this case we need to use (hybrid) mobile app ?
PWAs allow to cache assets and make them available to the users even when they are offline. There are some functionalities that only Native Apps have (eg. access to a device contacts), but they are very close under many other aspects.
I wrote an article about Service Workers and caching strategies where I explain how to cache static assets as well as HTTP GET calls. It is part of a series about PWAs, so you might find it useful to get more insights about this technology.
Have a look at the website what web can do today to have a list of WEB APIs currently available:
I do not know the detail of your requirements, but maybe you do not even need to implement an hybrid app and simply create a PWA.
is it possible to convert web (social)network made in HTML5 to mobile app? And then enable pop out messages for android and iOs?
If not, what would you suggest?
I'm trying to make some kind of social network and I'm having trobles deciding how to do it. I'd like to make an app and put it on app store or i-store. I know how to do it with html5 and java script, but I don't know how to convert it in to app and give it function of a pop up messages.
you can search for progressive web app(PWA) development which enables you to do this
I'm building an application that allows users to upload multimedia files they create (audio, video, graphic) via my web frontend, and then other users can stream/download the files to their phone using my mobile app. I'm building the mobile app with react native. The problem is with the android platform-- when the files are downloaded, they show up in the Downloads folder, which means they can be copied, moved, and opened from other apps.
Since the file contents are copyrighted, I need to find a way to
prevent these files from being listed in the Downloads folder
and / or
prevent other apps from opening them.
Apps like Spotify and Netflix manage to do it (e.g. if you download a playlist from Spotify, you can't see them anywhere else on your phone). I believe some kind of encryption/decryption scheme is involved. But I don't know enough about it. Would appreciate any insight on how to go about this.
As Luke says, there is no 100% protection, but usual approach is to encrypt the files and to use a DRM system to manage the secure transition of the key from the server to the client Android device.
Android devices (generally) come with widevide DRM built in and this is probably the most common one used, but the system supports other DRMs also and device vendors may add different ones.
If you are prepared to accept a less secure encryption, but one which may be good enough for your needs, then MPEG DASH includes a 'clearkey' option which ExoPlayer supports. If you do go this way it is worth checking on the latest ExoPlayer status as this feature is being worked on at the moment:
https://github.com/google/ExoPlayer/issues/3178
Morning,
I have created an app using html5 and javascript for the store, as part of this app, the users can take photos using Windows.Media.Capture.CameraCaptureUI() which is then sent to an API and subsequent database.
All is working fine and dandy on the Dell Lattitude ST2 running windows 8.
The users are going to be in some dark and stinky places, so the flash must fire off at least on automatic.
As this isn't a current OS, we are testing a few other tablets with the app running Windows 8.1 e.g. Lenovo Thinkpad. We have found that the flash doesn't fire at all using this, in fact the dialog that opens looks totally different from the camera app in the programs.
Does anyone know why this is and how to make the flash fire using the Windows.Media.Capture.CameraCaptureUI() method, short of sending this through PhoneGap which we will consider if that's the only option.
I have an application on Samsung Smart TV. I'm fetching data from web service and display this data in my application.
I'm fetching the data periodically and updating the application accordingly.
I want to run this operation as a background process, so it'll download the data and if there is an update, I warn the user when s/he watching TV.
The other thing I want is to start application on TV launch, is it possible?
Only 'ticker' type application can run in background. It is not supported in Europe and will not pass certification for Samsung Apps store.
Samsung Smart TV suppots push-notifications (samsungdforum.com/Guide/art00080/index.html).
It will allow you to show popup-message on screen with ability to launch your application.
You cannot auto-start application on TV launch.
The only way is to use custom firmware like SamyGo (http://www.samygo.tv/)
About the "background process"... as far as we assume that JavaScript's setTimeout or setInterval can be used to execute application's "internal" background process, there is no problem - Just DO it! :)
But if you were thinking about system's background process - for ex. crontab of device - it's impossible.
for your second doubt
Auto launch of the application is supported in ticker applications only and there is property in config file of the ticker widget :
"<ticker itemtype="boolean">y</ticker>"
if u mark it as y(as above) than you can set up auto launch of the app from
Menu->smart Hub->Apps settings->auto ticker. in 2014 Samsung Smart TV models.
Since Tv has limited memory I wont recommend background process like setInterval or setTimout. You may have refresh button for the same.
And They must have some js api for controlling internal method of tv application (not sure). Anyway if you really want to use interval/timeout dont forget to clear it.
As it shown here, WebSocket is supported by Samsung Smart TV. Your server application can trigger TV application when an update is appear. It is more efficient way than polling server with ajax for your case.
(Edit) I wrote a sample application to demonstrate:
https://github.com/aksakalli/socket.io-hello-world
(Edit 2) I see that your problem is about platform limits. My answer is just about approaches that can be applied then I have very limited experience on Samsung Smart TV.