I have found this interesting Project in the Internet and my first question is how to access the data (which is connected via Bluetooth to Android) from within Unity3D.
https://pauldyan.wordpress.com/2016/01/24/my-vr-bike/
I have seen that there is an "asset" for Bluetooth but is there a direct way or a way without the Need of buying that asset?
Regards
Kev
You could, but it would involve writing your own library for both Android and iOS.
I really don't recommend going this route. You would have to write hooks for every single native iOS and Android Bluetooth function. Both operating systems would need hundreds of lines of code and several days of testing to get going.
I'd recommend just buying it. The asset is 10 dollars, which is worth the time saved.
Related
I intend to port a Qt desktop application to Android. It uses QSerialPort to communicate with an external device (which has a built-in CP210x)
The application, although written purely in Qt and C++, runs fine on Android, but it doesn't see the device. The CP210x official driver download page recommends to compile the kernel on Android from source, which is not feasible to expect from the average customer. Other recommendations I found online recommend jailbraking the phone, which also isn't something we could expect end users to do.
There are scant few questions in this topic on the Qt forums, most saying that QSerialPort's Android support is quite limited. However, these topics are often at least 6-7 years old.
An Android developer forum/wiki/tutorial? recommends to use "Android Things", whatever it is. I couldn't find any apps fitting that description.
I know that it's physically possible to use serial-usb on an non-jailbroken Android, as I tried out a serial console app and it worked, I could successfully exchange data with my device.
Does this mean that the only was is to develop my own wrapper in Java, and use JNIEXPORT? That would break the easy multi-platform compilation I used before (just selecting a different kit from Qt Creator) Are there any simpler ways to accomplish this? Is USB OTG usage so low that no one else thought to implement anything in this regard?
QSerialPort has only a non-official partial Android Support (see https://wiki.qt.io/Qt_Serial_Port).
(... Use on own risk, only for rooted devices, in which is it possible to get/set a permissions to the /dev/ttyXYZ nodes)
You can use JNI to get a FileDescriptor with permission and then use the libusb library in C++ to communicate with device.
But yes, it would break the easy multi-platform compilation.
I need to utilize both a barcode scanner and a USB port on something handheld. I figure a small Android Tablet is my best option.
I've spent some time researching and I cannot find anyone who has implemented a NativeScript App w/ Serial Port communication on Android.
I am concerned this means it is not possible, or prohibited for some reason.
I have the Serial Communication functional right now using Nodejs and the serialport module via NPM.
Does anyone know if this module will work in a NativeScript app?
I am going to attempt to make this work over the weekend, but before I waste a lot of time I figured I would ask in case this is simply not possible -- I've chased simple bugs for days so I could waste a long time on something that's not possible. :)
Thanks for your help!
Anything you can do with a pure Java-only app (or Swift/Object C for iOS) you can do with NativeScript as you can access all the underlining APIs. This is one of (if not the) key differences between NativeScript and other technologies. See the NativeScript docs.
Most probably, you'll want to use some third party code to communicate with the serial device (such as usb-serial-for-android). Here's a great blog post on how to use third party code in your NativeScript app.
I'm a complete newbie with regards to developing for Android, and for starters I'm trying to develop a simple card game that can be played multiplayer over a local network. I'm having trouble finding a starting point for how I would go about this, I can find plenty of things for communicating across the internet but not having much luck seeing how you communicate directly between two devices over a LAN.
It's a major part of my plan for this app that it be multi-platform and that iOS devices and Android devices can play against each other, so I'm looking for a method that supports this. I know it's possible as I can see there are other apps that have this functionality.
I don't need a detailed implementation (although the more help the better!) but if anyone could just point me in the right direction for how to go about something like this, I'd be really grateful.
I think u need a connection peer to peer, android implements Wifi Direct
Look android dev site. http://developer.android.com/guide/topics/connectivity/wifip2p.html
For a card game I recommend using client-server.
Electrotank is a good server that provides a framework that helps you create a game of this type, with rooms, chat, friends list and connect to Android and iOS. U can write server plugins in Java.
http://www.electrotank.com/es5.html.
Another good server solution is SmartFox.
Or you can create a turn-based game, creating a database to save data and a counter on each client, where you will limit the time for each move, from this time you send data to the server and your opponent query this data the server.
I was working on the exact same thing. You'll want to use sockets to open up connections between multiple instances the same app.
I created an example app that demonstrates how to do this which I link to and explain in great detail here: http://brendaninnis.ca/connect-nearby-devices-part-2.html
I have an example for both Android and iOS that communicate with each other.
This is for a research project at school so this is somewhat urgent. We need to know if this technology exists, or if it would require us to build something native for each device.
Is it possible to use any frameworks or tools to access Bluetooth sensors from a non-native application. For example, I gather that HTML5 applications will can access some sensors, but need bridging frameworks to access others (i.e. PhoneGap). Are there any other apps that have tackled this problem in the past that we can research?
With iOS you need to use it through GameKit, and even then there are big restrictions. With android your application has to specifically request access to bluetooth with permissions.
As far as I searched, it's not possible to use raw HTML5 to access to mobile native features such as Bluetooth on mobile devices. The only way so far that I have found is to use cross-platform mobile application development or native apps. Just keep in mind that not all cross-platform frameworks support all phone native features like Bluetooth. I think the one you mentioned, PhoneGap, does not support Bluetooth. It would be great to put comments if have you come up with any solution for your post.
Check this link to get some idea about different frameworks and their features.
I have just started researching creating mobile apps and from what I understand one big advantage of using HTML5/Javascript is that you can write one application that works with both Android and iOS.
I have also read that one of the drawbacks is that there are certain things that you can't do with HTML5/Javascript that you can with a native mobile app.
Is what I stated above correct? What will I not be able to do if I decide to go the HTML5/Javascript route?
While both native and web have their own positives and negatives, the one main advantage that native apps had over web apps was "Offline Access"
However that is now changing as HTML5 has support fo Offline Web Applications.
Some things for iOS:
Background audio/sound effects
Address book
Leverage CoreGraphics & OpenGL for advanced drawing
Camera access
Accelerometer
Limited Calendar Access
It all depends on what you are going to do. If your app needs GPS, the accelerometer, or is very graphics intensive, then a native app is the only way to go.
Otherwise, I would go with something like Sencha Touch for your app for a couple reasons. First off, if you release an update with a HTML5 app, you don't need to force everyone to download it, it will update automatically. Also, as you mentioned, you only need to write one application for all mobile platforms, which expands the potential user base. Lastly, I think the internet on phones is getting fast enough to support internet applications very well, and this is only going to improve in the days to come.
Basically, it all depends on the specific needs of the application. Personally, I would go with HTML5 whenever possible, due to the mobility it gives you with platforms.
I think we can separate this into two lists...
What can be done on a mobile device that is not possible in HTML5:
Push Notifications
Advanced Graphics (3d, OpenGL)
File Uploads (possible on Android but not iOS)
Connect to Address Book
Connect to Calendar
What can be done in HTML5 but is easier or implemented better on mobile devices:
Camera Access
Offline Use
Device Location Services
Sound
Accelerometer
Speed / Slickness of UI (hard to quantify, but apps typically still feel nicer when native)
(Please note the date this was answered on, this landscape could be quite different in 6-12 months or more.)
In theory not much, if you use titanium. http://www.appcelerator.com/products/titanium-mobile-application-development/
Unlimited Extensibility
Titanium’s plug-in architecture allows you code modules in Objective-C or Java to
extend your mobile app with custom native functionality and then call those
modules using Javascript in Titanium.
Though i have never used Titanium and dont know how well this works. I would stick with native development anyhow ... for now.