Category: Videos

Snowflake Christmas card web page on the Raspberry Pi

In this video I will show you how to make an electronic Christmas card for your friends or family using HTML and JavaScript, which means it will be a little web site that anyone can see by going to it in their Internet browser.

I’m doing this on the Raspberry Pi, but you can do the same thing on almost any computer that exists. All you need is a web browser (like Firefox or Internet Explorer) and a text editor (like Notepad or Gedit).

If this looks very difficult, try the video I made making a similar card using Scratch, which is a lot easier: Snowflake Christmas card in Scratch on the Raspberry Pi.

If you’d like to use the snowflake picture I drew, right-click this link and choose “Save link as…” or similar: snowflake.svg.

If you’d like to compare my code against yours, right-click this link and choose “Save link as…” or similar: snowflakes.html.

If you’d like to see what the finished product looks like, just left-click on snowflakes.html above, instead of right-clicking.

Snowflake Christmas card in Scratch on the Raspberry Pi

In this video I will show you how to make an electronic Christmas card for your friends or family using Scratch.

Scratch can work on most computers – you can download it from http://scratch.mit.edu/.

Scratch is already installed on your Raspberry Pi if you’ve got Raspian or NOOBs on your SD card.

(If you want to get a Pi try my Raspberry Pi: Before we start video.)

If you want to try something more advanced, you can make a similar card as a web page: Snowflake Christmas card web page on the Raspberry Pi.

Android development – saving state

Series: Setup, Menu, Drawing, non-Android, Working, Saving state.

Android apps like Rabbit Escape need to save their state when asked, and restore themselves later. This happens when you rotate the screen, and could happen at various other times. Here’s how I handled that in Rabbit Escape:

Android development – Rabbit Escape really working on Android

Series: Setup, Menu, Drawing, non-Android, Working, Saving state.

Up until now, you weren’t sure to believe my promises that Rabbit Escape really was going to be an Android game, since I hadn’t actually got it running on Android. Well, the wait is over:

Android programming – a non-Android, Android Game

Series: Setup, Menu, Drawing, non-Android, Working, Saving state

We’re planning to write an Android game. So why would we deliberately avoid Android while we’re writing it? To make sure we’re not overly-dependent on the Android ways of doing things, and are able to run our tests etc. on the local machine: