Snack

If you want to use ZXing for barcode reading, but do not want your customer to install a third party app. Or if you just can’t because the Android device you are using cannot connect to the Play store (as is the case with many wearables), there is an extremely Read more…

If you have set your phone to debugging, but adb doesn’t recognise it, try switching the way it connects to the PC. I found that using “Charge Only”, or “MTP” caused the debugging to not work. Putting it on “PTP” made it work.

To quickly test your SQLite database while developing an Android app, it can be useful to use the sqlite3 command line command to query the database. However, it is not easy to get to the SQLite file: you cannot just download it from your device, nor can you mount the Read more…

Started working with Python, which is extremely easy and a joy to work in. It also has great libraries and tools you can use. So, also started using CherryPy to power the XML API I am working on. While debugging it throws out a lot of messages on stdout, of Read more…

Create keys: var csp = new RSACryptoServiceProvider(keyStrength); var privateKey = csp.ExportCspBlob(true); var publicKey = csp.ExportCspBlob(false); Sign data: var csp = new RSACryptoServiceProvider(); csp.Clear(); csp.ImportCspBlob(File.ReadAllBytes(privateKeyFile)); var sig = csp.SignData(data, new SHA1CryptoServiceProvider()); Verify data: csp.Clear(); csp.ImportCspBlob(File.ReadAllBytes(publicKeyFile)); if (csp.VerifyData(data, new SHA1CryptoServiceProvider(), sig)) {     Console.WriteLine(“Data is OK”); } else {     Console.WriteLine(“Data is Read more…

If you are building a Adobe Flex application that uses sockets, you have to send the policy-file-request, or crossdomain.xml. A lot of info available on it, except that you need to send a null character at the end of it.

HTML defines onClick and onDblClick event handlers on all elements. However, if you want to enable both on the same element, something goes wrong. the onClick event gets fired twice! And that is not what we want, so here’s a little Javascript to fix that: // use these functions to Read more…

To set a time, use the (very convenient) Dat eobject: var now = new Date(); If you want to set a certain date, use: var someDate = new Date(“yyyy-mm-ddThh:mm:ss+hh:mm”); e.g.: var someDate = new Date(“2012-05-17T00:00:00+02:00”); For May 17th, 2012 00:00:00, CEST. Notice (and I just found that out), not all Read more…

In Eclipse, with the ADT plugin for Android development, what to do if your widget-IDs seem to be all over the place? What if that TextEdit suddenly seems to have jumped over two TextView widgets? Simply running a “Clean project” fixes it. It seems to be triggered by a lot Read more…