Skip to main content

Lua on Android

Note: This post is out of date. If you'd like to run Lua on your Android device, please see my Android Scripting Environment project.

After messing around for two days trying to get Python running on Android, I decided to give Lua a try. It didn't take much to get the interpreter running (especially compared to Python which still isn't running for me). Here's a very small patch for Lua 5.1.4.
diff -r lua-5.1.4/src/llex.c lua-5.1.4-android/src/llex.c
179c179
< struct lconv *cv = localeconv();
---
> //struct lconv *cv = localeconv();
181c181
< ls->decpoint = (cv ? cv->decimal_point[0] : '.');
---
> ls->decpoint = '.';//(cv ? cv->decimal_point[0] : '.');
461d460
<
diff -r lua-5.1.4/src/lvm.c lua-5.1.4-android/src/lvm.c
205c205
< int temp = strcoll(l, r);
---
> int temp = strcmp(l, r);//strcoll(l, r);
763d762
<
You'll also need get the Android source and build it. Then grab agcc (a small Perl script) linked to from some brief instructions about compiling native code for Android. Here are some even briefer instructions for getting Lua on your G1 :)
  • Add agcc to your path.
  • Add mydroid/prebuilt/linux-x86/toolchain/arm-eabi-4.2.1/bin to your path (the Android toolchain).
  • Add mydroid/out/host/linux-x86/bin to your path (the Android development tools).
  • Build and install Lua.
$ make CC=agcc AR="arm-eabi-ar rcu" RANLIB=arm-eabi-ranlib posix
...
$ make INSTALL_TOP=$(pwd)/lua-android install
  • Copy Lua to your phone/emulator using adb.
$ cd lua-android
$ rm -rf man
$ adb shell
$ su
# cd data
# mkdir bin include lib share
# exit
$ exit
$ adb push . data
You can now either run Lua from adb shell or by installing the terminal emulator app and running it directly on your phone.


Update
I fixed some bugs in the instructions. :)

Popular posts from this blog

Email Injection

Not so long ago, I ran a wiki called SecurePHP. On that wiki, there was one particular article about email injection that received a lot of attention. Naturally, with all the attention came lots of spam. As a result, I disabled editing of the wiki and content stagnated. Still, the email injection article remained popular. About a year later, the server that hosted SecurePHP died and I never had a chance to hook it all back up. I saved the article though and I'm reposting it now. It may be a bit old (I've been away from PHP for a long time), and I didn't write all of it, so feel free to leave comments about needed updates and corrections. Though this article focuses on PHP, it provides a lot of general information regarding email injection attacks. The PHP mail() Function There are a lot of ways to send anonymous emails, some use it to mass mail, some use it to spoof identity, and some (a few) use it to send email anonymously. Usually a web mailform using the mail() funct
Read more

Bot Commander r1 Released

I just published Bot Commander , the code for my Lego NXT rover . There's a lot left to be done, but release early and often, right? Currently it provides a UI for controlling the direction and speed of all three motor ports on the NXT brick. You can link motors together to adjust their speed in unison. In addition, you can enable "Tilt Control" for a steering-wheel-type experience. To use tilt control: Hook up motor A and B to be the left and right wheels of your vehicle. Hold the phone sideways (i.e. landscape). Tilt the phone forward and backward to drive forward and backward. Turn the phone right and left (like a steering wheel) to steer right and left. As you tilt the phone, you'll see the UI update the slider controls for the speed of motors A and B. I plan to expand the UI to provide a lot more than just motor control. Before that, though, I'll push a JAR to make it easy to integrate control of Lego NXT robots into your own Android project. The code
Read more

Android Recipes and Snippets

I've put together a small collection of Android recipes. For each of these recipes, this is an instance of Context (more specifically, Activity or Service ) unless otherwise noted. Enjoy :) Intents One of the coolest things about Android is Intents . The two most common uses of Intents are starting an Activity (open an email, contact, etc.) and starting an Activity for a result (scan a barcode, take a picture to attach to an email, etc.). Intents are specified primarily using action strings and URIs. Here are some things you can do with the android.intent.action.VIEW action and startActivity() . Intent intent = new Intent(Intent.ACTION_VIEW); // Choose a value for uri from the following. // Search Google Maps: geo:0,0?q=query // Show contacts: content://contacts/people // Show a URL: http://www.google.com intent.setData(Uri.parse(uri)); intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); startActivity(intent); Other useful action/URI pairs include: Intent.ACTION_DIAL , tel://867530
Read more