JVBridge plugin (Android)

Javi · December 2012

I have zero experience in Android but soon I'll need to use it, so I've made a plugin to create plugins coding directly in Java, in this way it's very easy and fast, no more JNI programming, build libs, etc.
I've made some stress tests (in the emulator) and it works ok, no memory leaks or crashes.

http://neptalium.com/download/gideros_jvbridge_android.zip

Read the PDF included, there are some very basic examples of how to use it.

ar2rsawseen · December 2012

Now that's totally awesome, will check it out

hnim · December 2012

that's great! still waiting for this

hnim · December 2012

that's awesome. simple to implement. thanks a lot <:-P

keszegh · December 2012

that sounds very useful.
btw, in which file shall we put the java codes?

yvz5 · December 2012

wow great job.

omer · December 2012

Thanks for sharing, for example can we call webview class to embed an local html file. If we can, we can use a lot of javascript to extend projects. Can you prepare an example to call an local html file using java android webview class? Also can we call facebook java plugin using this tech? You know facebook supports only java on Android.

vitalitymobile · December 2012

I just think about an android plugin that can switch between native android activity and Gideros Screen.
This is exactly plugin that i need. @Javi You are awesome!

atilim · December 2012

Thanks @Javi. That's awesome.

Javi · December 2012

You're all welcome.

that sounds very useful.
btw, in which file shall we put the java codes?

It can be used from any function and in any thread, but I if you want to make a plugin I would recommend to encapsulate it as a Java class and create also a Lua class as interface.

Thanks for sharing, for example can we call webview class to embed an local html file. If we can, we can use a lot of javascript to extend projects. Can you prepare an example to call an local html file using java android webview class? Also can we call facebook java plugin using this tech? You know facebook supports only java on Android.

Yes, you can use it with webview, facebook, etc. You can call any Java function from JVBridge.

alexzheng · December 2012

That's really awesome!
Tried it,very easy to using.
Thanks!

omer · December 2012

Are you planning to share source code of your library? If you can pull source code on github, community can add some example codes and detect bugs to improve quality of codes.

Javi · December 2012

Version 1.0.1.
Changes: Corrected a typo in multithreading code (not really relevant but I recommend to update).
http://neptalium.com/download/gideros_jvbridge_android.zip

Are you planning to share source code of your library? If you can pull source code on github, community can add some example codes and detect bugs to improve quality of codes.

I've released it with the libs precompiled for your convenience but I have no problem sharing the JNI code if you want to compile it yourself. Here it is: http://neptalium.com/download/gideros_jvbridge_android_src.zip

It's not a good practice, but I packed the code in only one CPP file; I didn't want to create 6 source files for such a tiny project.

Radiesel · January 2013

Just I am not quite sure, would it be possible e.g. to create a native listview/tableview and display it in gideros using jvbridge as some sort of overlay view? I mean like Apples Gamecenter?

thanks!
Michael

Javi · January 2013

Just I am not quite sure, would it be possible e.g. to create a native listview/tableview and display it in gideros using jvbridge as some sort of overlay view? I mean like Apples Gamecenter?

thanks!
Michael

Why not? For example, plugins as AdMob do that. The rule of thumb is; if you can do it in Java you can use it with JVBridge.
Just make the code in Java to create and control the ListView and then use JVBridge to control it from Lua.
I don't use Android but I guess that you'll need to use a FrameLayout to show the ListView over Gideros mGLView.

Radiesel · January 2013

thank you! Will try that....

alexzheng · January 2013

hi @Javi.

This is a great plugin,it makes call java api a lot more easier.

have you tried building the JVBridge plugin into the gideros player and run lua in the player from the gideros studio?

I called jvbridge.callJava("somejavaFunc") and the player crashed,logged:
JNI: DeleteGlobalRef(0x1d20023e) failed to find entry.

of course, if I export the project and run it in the device, it works fine.

Javi · January 2013

I didn't test it in the player (I only use the emulator) but for your comment it seems that Gideros player is calling g_deinitializePlugin() more than one time (I guess that the player is keeping the instance of the plugin "alive" between sessions).
Just today I'm going to release a new version and I'll also make some changes to solve this, and we'll see if that's the problem or not.

Javi · January 2013

New JVBridge version 1.0.2.

http://neptalium.com/download/gideros_jvbridge_android.zip

Changes:

- Now it's possible to transfer raw byte arrays between Lua <-> Java. (Read the manual; examples and new JVBridgeParams methods byte[] getByteArray(int index) and void addByteArray(byte[] param)).

- A couple of internal improvements processing parameters.

- Manual updated.

- Problem with Gideros player. BTW @alexzheng please test it again with this version and tell me if that problem is solved or not.

alexzheng · January 2013

It's solvled ,now it's perfect!

Javi · January 2013

It's solvled ,now it's perfect!

OK, thanks

omer · January 2013

Thanks, did you update source code?
How can I download source code?
Did you create an github repo?

geisonbiazus · January 2013

Thanks Javi, this will be very useful =D

krisis · January 2013

Thanks @Javi, this looks super useful!

Does anyone have a working example using this with Facebook SDK for Android?

Javi · January 2013

@omer You're welcome. I only use SCM for big projects and never Git (I don't like it), I use Fossil and JFileSync. I think I didn't update the src zip, I'll do it, are you going to make some improvements in JVBridge?

@geisonbiazus @krisis You're welcome.

BTW @krisis Maybe one of these days I'll code a plugin to make snapshots, I think it'd be a good example of how to make plugins with JVBridge.

omer · January 2013

I have some niche ideas for plugin. If you can publish latest source code on forum. I'll prepare an git repo for this project. Everyone check activities and code updates easily,

chipster123 · January 2013

I'm interested in using this to get access to the magnetic sensor in order to get field strength values. I'm been using the built in Gideros mechanism that gives magnetic heading. Looking forward to testing it out. Thanks @Javi

fxone · June 2013

Hi @Javi! would you mind taking a look at my problem with armv6 architecture and your plugin:
http://www.giderosmobile.com/forum/discussion/2871/gideros-and-android-demo-how-to-switch-activity-from-lua-to-native-and-vice-versa#Item_2
thank you!

achimeno · January 2014

@Javi The link to this plugin is down.

Anybody know another option to do the same?
Thank you,
Alex

ar2rsawseen · January 2014

@achimeno yes Android Native Bridge in Gideros Labs

but you can also contact @Javi to see if you can still get it and upload somewhere where anyone could get it

amaximov · February 2014

Anyone know where I can find this plugin?

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