I’m Back, Again!

It’s exactly one year and 9 days since I last posted on this blog. I had some issues with my MySQL DB for this blog which was wrongly set to some other encoding, than UTF8.

After exporting my blog data, then re-installing latest WordPress, then importing data back in, fixing, tweaking settings. Now this is the first post after the overhaul.

I have some cool topics to discuss on this blog in coming weeks. I’ll give you some hints for whats coming:

  • Flash on Mobile and its future
  • Unity3D, why I’m going for it
  • State of Windows Phone as a platform for developers
  • And some more random thoughts around these, stay tuned!

// chall3ng3r //

QR Coder for Mobile Devices

Being a mobile app developer, I have to keep few devices around me all day for debugging and testing my apps. Nowadays, all smartphones come with Bluetooth, WiFi and now NFC technologies, but they all fail to talk to each other for even simple text data exchange.

I find myself in situations where I need to quickly get piece of text from one device to another. It could be a link, some text copied from browser, or SMS message I received on one device, and need to get on other device without messing around with apps or wires.

QRCoder-demo

Yesterday this idea came to my mind when I was reading a lengthy article on my HTC Titan and received system notification that I need to recharge or else phone will power off. I wanted to quickly open the same article on my Nokia E7 which I was also carrying with me.

As I described earlier, that we currently don’t have any standard way to get these devices talk to each other directly without going through the “cloud”, so I was stuck there.

I quickly jumped back to my seat, and started some experiments. After an hour I did my first test and and it was a success!

I wrote a tiny JavaScript which can be added into mobile browser’s favorites, and when you need to share current page’s link with another device, you can just go to that saved Favorite, which will execute my JavaScript, which will finally render a QR Code right on top of the page.

Now you just need to point your other smartphone or tablet camera to it with a QR Code reader app of course (built-in in WP and other OS’s), and voila! The link will now open up.

It works in PC browsers as well, so if you need to quickly open a link on your tablet or smartphone from PC, you can save this in bookmarks toolbar in IE/Chrome/FF/Safari, and click it to instantly make a QR code for current link.

I tested it on all major PC browsers, and on my Nokia E7 and HTC Titan. Works great! It should run on all mobile browsers which support editing of bookmark URL, so you can insert the code there.

BTW, I used old Google Charts APIs to make the QR codes.

And finally here’s the code which you can copy and save as favorite in your mobile browser.

Remember, there are no line breaks in this code. It’s just one long line of JavaScript code :)

Step by step guide:

  • Select and copy the above JavaScript code. On PC, do triple-click on code to select all code
  • Open web browser on mobile or PC
  • Add / save this page as bookmark or favorite
  • Now select and edit the saved bookmark
  • In name field, type “! QRCoder”. The character in start makes sure the bookmark is always on top of the list in your bookmarks list. Easy to tap :)
  • In Location / Address field, just paste the JavaScript code you copied in first step.
  • Ok / Done to save. Now go to any website and from bookmarks / favorites, tap on “! QRCoder”

To quickly land on this page, scan this QR code from your smartphone or tablet:

qrcoder-chall3ng3r

Tested on following devices / OS:

  • PC / Mac / Linux – Check
  • iPhone, iPad – Check
  • Windows Phone 7.5 – Check
  • Symbian Anna / Belle – Check
  • Z10 / BB10 – Check
  • ToDo: Android

I know when this gets published, many non-techy users are going ask how to save this code in mobile browser as favorite. So, here’s a little video demonstration on a Windows Phone:


[YouTube link for mobile viewing]

Kindly ignore audio/video quality and any narration mistakes, this is my first ever video, done really quick :D

It’s a quick and dirty hack to solve a problem. You can also hack it further as per your liking.

I would love to hear any feedback or a tweet :)

// chall3ng3r //