Reducing build size of Android game in Unreal Engine 4

Unreal Engine 4 is considered to be a big, bulky engine that generates a lot of data and has huge build sizes. Such feature might be a serious issue when making a mobile game. Here are few steps to do at the beginning of Android development in UE4 to avoid problems with enormous build sizes.

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DD2018: Unreal Engine 4 and mobiles – Tips and Tricks

So I was talking at Digital Dragons 2018 about using Unreal Engine 4 to make a mobile game…

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Symbolicating crash dumps for Android in Unreal Engine 4

Do you know what is more annoying than a crash? A crash that you don’t know how to track down. You are praying for not being in a situation where no debugger is attached or there is no crash log. Sadly – this is a very common situation when you are working with the external engine, on a mobile device.

Android c++ crash logs are even more nasty, because of their binary format. In fact – they are minidumps, the same format the Microsoft is using for dumping Windows crash data. To encrypt the Android’s minidumps you need to do some voodoo with Google Breakpad.

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Multidexing in Unreal Engine 4

When your app is growing, also its needs. Google Play, Facebook, analytics systems, advertising, crash reporters and more are put into the build and at some point the infamous “64k methods” problem occurs. Why? According to the Android Developer’s User Guide:

In other words – you can’t have more than 65,536 methods in Your java code (and it’s not so difficult to do this, because the full Google Play SDK uses about half of this limit).

Dealing with this problem is rather easy… if you are using Gradle. Unfortunatelly Unreal Engine 4 still uses Ant. So, what do we do when the “64k problem” hits us? Do we cry and fall into despair? No, no, no… This is how you can fix this:

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GIC 2016 lectures

So,.. I was at the Game Industry Conference in Poznań and I was lecturing about Unreal Engine 4 on mobiles and about Websockets. Because some of the attendants were asking about the presentations to download here are the links!

Also I’d like to thank all of you for been there. And for votes. You are awesome!

Building iOS game in Unreal Engine 4 via remote machine

In Unreal Engine 4 to build a source code for the iOS the Mac computer with installed Xcode is needed. If you are working for other platforms too, having two machines with separate projects might be troublesome. Or maybe you cannot afford buying a Mac for every working station? You can start a building process on the PC with Windows which will send the source code to the Mac computer, compile the code there, get the results and finish cooking and packaging the ipa on PC. How to do this? Here are the instructions!

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Unreal Engine 4 – Debugging on Android

andue4Debugging is the prose of life for every programmer. In Unreal Engine 4 there are many tools for debugging and profiling a game on Windows and Mac. Even for iOS, the XCode is a fine tool for nice bug hunting. But the Android was always… odd. For a long time the logcat was the only source of information about what is going inside the Unreal Engine game and it was always frustrating when something is crashing on device only. Theoretically, if something works in the editor it should works on the device too, but… this is theory and practice shows something completely different ;)

A new era for Android on Unreal Engine?

It might be, because with Visual Studio 2015 we received a powerful IDE that supports programming and debugging for Android (and other mobile platforms too) out of the box! And, it appears, that with the same tools we can easily debug the native c++ code on Android device!

Let’s get started.

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Simple protection against memory hacking – part 2

Last time I was writing about how cheating with leaderboards is possible in mobile games. There are applications that allow cheater to search memory for the interesting value and change it during the game runtime. This is obvious that those values can’t be stored in memory as themselves. How to encrypt them and in the same time make the whole mechanism easy to use?

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Simple protection against memory hacking – part 1

While playing video games with leaderboards you might notice that sometimes there are players with enormous, impossible scores.

lbhack

Impossible scores!

As you probably guess those ones weren’t scored by playing a game the fair way.
There are three (known to me) ways to do such a terrible thing:

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