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Way back when, I could run a c# compiler on my Windows Mobile phone and create apps. I think it would be fun to do on-device "compilation" on my Desire Z too.
I'm not asking for an IDE -- just something that can take Java source code and XML files, compile to bytecode for Dalvik and produce an .apk -- all on the device itself.
Is this possible?
OK -- we'd have to both a javac (java compiler) and a dx tool running on the device to do this. The first compiles the java source, the second takes that file and converts it to Dalvik bytecode.
Anyone else interested in this?
I'm very interested too. I tried sl4a but it's limited for now.
Sent from my Desire HD using XDA App
Dexify java compiler
I'm also very interested!
I develop in Java for the Eve VM on Windows Mobile: [www t-arn com/software.htm]
but for this I needed to install a JavaVM on the device.
But it should be possible to dexify the java compiler. I found following post:
[www ist-music eu/developer-zone/documentation/phoneme-and-osgi/music-on-android]
The porting of OSGi requires the dexification of the OSGi bundles. This is a process which makes any JAR file (compliant with Java VM) compatible with Dalvik VM. It basically consists on adding a new file, classes.dex, into the JAR file. To dexify each OSGi bundle, a two-step process is required by using the Android SDK tools. In windows, the process would be:
* Create the classes.dex file associated to the JAR file:
[ANDROID_SDK]\platforms\android-1.5\tools\dx.bat --dex --output=%CD%\classes.dex my_bundle.jar
* Incorporate the classes.dex file into the JAR file:
[ANDROID_SDK]\platforms\android-1.5\tools\aapt.exe add my_bundle.jar classes.dex
Now, the dexified bundles work on both VMs: Java VM and Dalvik VM.
Click to expand...
Click to collapse
I guess, we could do that for javac. If this does not work, we could try another Java compiler:
- EJC: [thecoderlounge blogspot com/2010/05/ecj-eclipse-java-compiler.html]
- kopisusu: [klomp org/KopiSusu/download.html]
I have no idea how to dexify the dx tool, though :-((
Hope to hear more from you guys
Tom
I have not yet gotten the Android SDK (nor a device...) but it seems that the dx tool itself is written in java. There is a dx.jar in the SKD. This one might already be dexified...or we could dexify with itself.
Tom
On-device development & compiler on a server...
Hi guys, I'm new to this Forum - just got my Archos 101 and now I'm searching for some more fun with it ;-)
So I really liked you guy's idea of having a compiler on the device itself - especially since the java compiler's really fast, so no doubt it can run on a smartphone...
I was really tempted by the open source "Open Blocks" library (education.mit.edu/openblocks) from some of these "Lifelong Kindergarden" people at the MIT... they're having this neat programming environment for teaching children programming, where you can drag/drop your source code like Lego...
Here you can have a look how the programming looks:
education.mit.edu/webdav/How%20to%20Create%20a%20Procedure/How_to_Create_a_Procedure.html
Now even google is using a similar thing, probably the same sources for their "App Inventor" (appinventor.googlelabs.com/about/), but you can only develop online at a real pc, then the .apk file is packaged on the server and downloaded to your android device...
So that's practically another way of having stuff compiled "on your device" - you could do the the development on a device and then have a server dedicated for a fast compiler and dx run...
Basically, I'd say that's the perfect system to write quick programs on a touchscreen device, especially when it's a bit larger tablet...
So if anyone wants to join in, I think I'm really keen on trying to port this OpenBlocks thing to the android screen ;-)
Cheers,
wowbag
Java IDE on Android
Hello everybody
I have just finished the latest version of taJavaIDE (0.3.0)
This APK is meant to become an Android development tool with which you can create native Android apps (APKs) ON the Android device itself.
What is working so far (on my Desire HD):
- Eclipse compiler for Java is integrated and working
- dx tool is integrated (not yet tested properly)
- BeanShell Interpreter is integrated and working.
You can write your own BeanShell script, store it on your SDCard and automate
the build process with it.
What is NOT yet working:
- aapt
- apkbuilder
- jarsigner
- zipalign
apkbuilder and jarsigner should not be a problem. I think, I can integrate those in the same way I integrated ecj.
As far as I know, zipalign is not absolutely needed (I might be wrong here, though).
My biggest problem is aapt which is not a Java application but a C++ application. To make it run on Android, you would need to port it to Java (looks like a REAL challenge!) or use the NDK to create a native library that you could then access from the APK.
I have no experience with the NDK and I also don't have the necessary build environment, so I would really appreciate if someone would help me out here!
Anybody interested in contributing?
Tom
Wow, thanks for getting this started, t-arn!
It's been forever since I did any C++, but I'll take a look at aapt and see what I can figure out.
Hopefully, a true C++ programmer will come along and set us straight
I'm very interested in this project and I would be willing to try to help out if you need it. I'm a second year software engineering student and I'm currently on a work term where all of my work is with android. I may not be of much help but at least I think I have some idea what I'm doing so let me know.
you are correct in saying that zipalign is not necessary. we only need it if we want to sign the apk in release mode(for publishing it to the market). We could just use debug mode and everything would be fine. I'm sure that if someone wanted to release an apk to the market, they could just copy the files over to their pc and zipalign it there. We would still be able to use the apk on the device without using zipalign.
t-arn said:
- jarsigner
Click to expand...
Click to collapse
Serison has an application on the market to sign APK's. Just thought I would let you know it is possible.
I would like this as well, as my phone has a physical keyboard and typing code isn't that bad on it - atleast not for minor edits/tweaks
JavaIDEdroid open source project
Hello everybody
I have created an open source project for JavaIDEdroid:
http://code.google.com/p/java-ide-droid/
Everybody is welcome to join the project (and hopefully contribute to it!)
As soon as I have cleaned up the code a little bit, I'll upload the source and the current APK.
For further questions and discussions, please join the java-ide-droid group. You'll find the link on the project's home page.
See you there!
Tom
Sounds pretty promising,looking forward to give it a try！
Sent from my Dell Streak using XDA App
Sounds possible, if you have the right components. I would love this. Would definitely donate to whoever got it working easily and 100%.
Very interesting project
Look nice. Downloading now.
I have wanted this since I first got an android phone.
I ended up using a virtual debain command line running OpenJava to compile and run the stuff. But if i can do it without that hastle in one app, I will LOVE you.
Edit: I tried it out. Mind explaining how to make a beanShell script? on the ECJ it always gives me a security exception even with just -help.
Code:
java.lang.SecurityException
at java.lang.System.setSecurityManager(System.java:610)
at com.t_arn.JavaIDEdroid,.DE.fnCompile(IDE.java:44)
at com.t_arn.JavaIDEdroid.MainActivity.fnCompile(MainActivty.java:167)
at com.t_arn.JavaIDEdroid.MainActivity.tabCompile_btnCompile(MainActivity.java:137)
......
Done in 1305348377 sec.
Please join the JavaIDEdroid support group at http://groups.google.com/group/java-ide-droid and re-post your question there.
I'd like to keep discussions there.
Thanks
Tom
very interesting, ill join the group, i can make the native lib for the aapt.
I would say get gcc working on the device then you can compile anything. You can compile a javavm. A native binary. Etc. If gcc can be compiled and work then all programs most likely can be compiled on the device assuming the proper libs are there to compile against.
Sent from my Incredible using Tapatalk
I have programmed in java for quite some time, and am decent at android apps.
However, i have two questions about developing on my device (rooted samsung captivate).
First, how can i get dev tools to run correctly on my phone. I have installed it as stated in "developer.android com/guide/developing/debug-tasks html#additionaldebugging". However, when clicking on Dev Settings it crashed with HARDWARE_TEST security exception. I have read that you need to sign/run it as system.
Is it possible to run it on my rooted captivate? if so how do i install it as system or find the system signature to sign it.
My other question is about programing, compiling, and running android applications from a device. I can take my .apk and unzip it. Then edit any resource files. Then rezip and sign it. However if i want to replace the actual code i need to compile it. I can use an online java compiler but i need to convert it to android format.
I know that dx.bat does this by using dx.jar . I can add dx.jar to the referenced libraries of my app. However i cant figure out what to do past there. Is what i am attempting even possible?
Thanks for your help.
There's a couple threads in this forum from folks like me who want to do this. Perhaps you can help us figure it out
Step one is I think to get an java compiler running on the phone. Then to make a version of DX that can run on the phone to convert the class to .apk
Thanks. in normal java programs you can use "com.sun.tools.javac.Main.compile( new String[] {args} );" found in the "<sdk>/lib/tools.jar" to compile a program. And dx.jar is what is used to covert it to android, however i do not know what to call in it.
We just need to find a way to get these jars to work on android.
alright finally i made up my mind for making android CLI app
now i want to make an app on linux , i can simply write a small CPP program
but what about android (Especially acer iconia)?
how should i begin
what are the tools required?
Thanks in advance
Not sure what your asking for exactly.
But if you have not developer.android.com. is a place you MUST Visit for all things android..
Android doesn't really work with CLI... You'll probably have to go with a GUI, and most apps are written in Java (other languages are somewhat tricky, as you have to use the JNI or IPC to use most android libs)... as mentioned above, you'll get the required tools on developer.android.com. Other than that: Android's libc is fundamentally broken, with many standard functions being unavailable or misbehaving -- a major cause of headaches.
i am talking in general
for example "Busybox"
its written in C/C++
i just wanna know how to compile my own C code for android
Busybox is a bit different, as it's not a user fronting app. For something like that, just cross compile to arm. I believe theres one in the ndk:
http://developer.android.com/sdk/ndk/index.html
You'll need the ndk for user fronting apps with c code as well, btw.
you can use other cross compilers as well:
https://sourcery.mentor.com/sgpp/lite/arm/portal/release324
aman11dhanpat said:
alright finally i made up my mind for making android CLI app
now i want to make an app on linux , i can simply write a small CPP program
but what about android (Especially acer iconia)?
how should i begin
what are the tools required?
Thanks in advance
Click to expand...
Click to collapse
Hello, and welcome to the exciting world of Android Development! *insert sparkles*
In the Android world, CLI apps aren't the most popular. Making an app with a GUI would be a much easier starting point to some extent.
What you'll need:
1. A computer with the necessary software installed. This can be a Linux, Mac, or even Windows machine. In the case of a Windows machine, be sure you have the correct drivers installed. With the Linux machine, be sure you have the correct udev rules for the Iconia. Install the Android SDK. Install Eclipse, and the Android plugin.
It sounds like you want to run some native code as well. Use the Android NDK. There's a nice little beginner's guide here. Every good programmer starts with their first Hello, World!
2. Preferably some experience with Java. Almost all Android apps run on the Dalvik VM.
3. Patience. A lot of patience. Compiling takes time.
4. A device to test your code on. Running in an emulator is not good enough. Enable developer debugging on your device in the settings.
Hope this helped a bit.
Thanks alot guys
now i guess i'll be able to make some of my own apps
To get started, I installed the Android SDK with ADT that also came with eclipse (unknown to me it came with eclipse) after I installed the Eclipse for JAVA developers. Neither one works as it says it can't locate the JAVAW file under jre/bin that's suppose to be in the eclipse folder. Anyhow, to see if I could fix it I cut the JRE folder from my Java folder, and placed it in the eclipse folder. It attempted to run this time but gave me an error saying it couldn't open the jvm.dll file. I then went back after watching the xdatv video and installed the eclipse classic. Still a no go. I also realized I have no JDK installed, which I'm doing so now, but either or I thought it would run with a JRE too.
Anyone got a fix for my issue? Or will installing the JDK be the fix?
Ok sorry for the stupid question. turns out I did install the jdk but a re-install fixed my issue.
Well, it's not really directly related with the problem you had, but next time you need to download the Android SDK, there is an option not to include the Eclipse in the bundle.
Are you setting up a build environment ? The reason I ask is there are a few easy ways to set it, using a more painless way.
dirtydroidx said:
Are you setting up a build environment ? The reason I ask is there are a few easy ways to set it, using a more painless way.
Click to expand...
Click to collapse
I am. The problem was resolved, and able to start eclipse with no problem now.
Hey guys,
I have been having trouble getting started developing applications for android. I know how to use Java, and frequently use the netbeans ide for my java homework ect. But I decided why not adventure out and build upon what I learned in school. Unfortunately I have ran into nothing but problems. The first problem is this:
"Gradle project sync failed. Basic functionality (e.g editing, debugging) will not work properly. "
In the messeages window it reads:
[file path to \app\build.gradle]
Failed to Find: com.android.support:appcompact-v7:21+
I have had trouble using grade in eclipse....well I only got eclipse to work once, when I first got my phone, and managed to make a small pop-up app for my self. I did not know any programming language at the time. I merely just copy and pasted most of the code.
and problem number two;
The generated code is riddled with errors?
I look through most of these errors and they state that certain things can be resovled. For example, cant resolve "support" <--- I think that by not having this imported correctly (I think this falls into the first problem) is causing the rest of the errors in my MainActivity file to go crazy.
Is their any way to post more information? Like a log file, maybe that might be of more help too. I just am unfamiliar with Android Studio, as of right now. Attached is a picture of the IDE when is spawns the error.
Thanks for the help in advance!
How to Fix said issue
KJ4CCH said:
Hey guys,
I have been having trouble getting started developing applications for android. I know how to use Java, and frequently use the netbeans ide for my java homework ect. But I decided why not adventure out and build upon what I learned in school. Unfortunately I have ran into nothing but problems. The first problem is this:
"Gradle project sync failed. Basic functionality (e.g editing, debugging) will not work properly. "
In the messeages window it reads:
[file path to \app\build.gradle]
Failed to Find: com.android.support:appcompact-v7:21+
I have had trouble using grade in eclipse....well I only got eclipse to work once, when I first got my phone, and managed to make a small pop-up app for my self. I did not know any programming language at the time. I merely just copy and pasted most of the code.
and problem number two;
The generated code is riddled with errors?
I look through most of these errors and they state that certain things can be resovled. For example, cant resolve "support" <--- I think that by not having this imported correctly (I think this falls into the first problem) is causing the rest of the errors in my MainActivity file to go crazy.
Is their any way to post more information? Like a log file, maybe that might be of more help too. I just am unfamiliar with Android Studio, as of right now. Attached is a picture of the IDE when is spawns the error.
Thanks for the help in advance!
Click to expand...
Click to collapse
Ok guys, I figured it out. We need to install a package from the sdk manager. The picture shows which one needs to be installed. The package is "Android Support Repository"
Seems you have already gotten the answer. But for this kind of questions, past the main line of the error log into Google is much faster than post a question, I think.