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Archive for the Category: android
QtMultimedia, FFMpeg, Gstreamer: comparing multimedia frameworks
Update Feb 7, 2019: despite being written ten years ago and last updated three years ago, this article content remains correct, and still describes the actual situation with the multimedia frameworks. During the last few years I had developed several multimedia applications. The applications were open-source, free and cross-platform, and therefore they needed the multimedia […]
Android: an easy splash screen implementation using ImageView
I’ve seen a number of suggestions of how to implement a splash screen properly. Most typical implementation is through activities. To show it, you need to make it the first activity in your application, which has a few disadvantages: It is an activity, so it will use the Android-specific effect (typically sliding) to switch from […]
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Reverse-engineering the KaraFun file format. Part 4, the encryption
So far all the files we have seen were not encrypted. However some users pointed out there are KFN files which are encrypted. While the encrypted files were still analysed and dumped properly, the output files were encrypted and hence unusable. But the users also confirmed that KaraFun player plays those files just fine, and does […]
Also posted in reverse engineering 25 Comments
Reverse-engineering the KaraFun file format. Part 3, the Song.ini file
This is quite simple. We look at the song.ini file and it is obvious immediately where the text and the timing information is as those are the only lines with enough numbers.
Also posted in reverse engineering 1 Comment
Reverse-engineering the KaraFun file format. Part 2, the directory
In the first part we found out the header format, and that it does not provide us with the directory location. However we know there must be a directory, as the KaraFun application must know where exactly in a file the files are stored, and how large are they. At minimum there should be the directory […]
Also posted in reverse engineering Comments Off on Reverse-engineering the KaraFun file format. Part 2, the directory
Reverse-engineering the KaraFun file format. Part 1, the header
Several of our users have expressed disappointment that our Ulduzsoft Karaoke Player for Android does not support the popular KaraFun Karaoke format. This format seem to be very popular in some countries, and unfortunately there seem to be no player on Android capable of playing those files. Even the KaraFun Android application does not play those files […]
Also posted in reverse engineering 11 Comments
Ulduzsoft Karaoke Player for Android is out of Beta now!
Today we released Ulduzsoft Karaoke Player for Android version 1.12. It has been a beta for close to nine months, and it is labor time. The application seem to be well-received, with a competitive functionality and the most bugs seem to be fixed. We had a long discussion about the app monetization and decided to […]
Parsing ID3v2 tags in the MP3 files
This simple tag parser is very useful when you just need to get the basic information about the MP3 files, such as the title and the artist. Of course it could be extended to extract more information if necessary. Apache license.
ColorPreference class for Android
There are many Android color pickers used for preferences, but they all seem to be unnecessary complex for an ordinary user. If all you need is to let the user choose a single color from a set, you can use this simple class which is conveniently integrated into the Preferences scheme.
FontPreference dialog for Android
Using the FontManager class it is possible to implement a simple and nice font selection dialog on Android platform. This is also one of the very few ListView implementation which implements the custom ListView by properly subclassing the DialogPreference the same way ListPreference does. It may also be interesting for anyone who is looking for […]