Tutorial Create Extension. Template. Source code. Build extension.

[Juan Antonio]

Hi friends, this is a tutorial to create extension. Build extension.

- Let's create an extension on the Pythagorean theorem: pitagoras.aix

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- Create in your PC-Windows this folder:

C:/AppInventorExtensiones

- Download in that folder these packages [or other recent version]

- Continue in this tutorial...

http://kio4.com/appinventor/125B_extensiones_crear_i.htm

- Install java JDK, GIT and ANT.

- Change User variables:

- Download appinventor-sources:

- Download Source code Pitagoras.java for Pitagoras.aix extension.

- Build extension:

- Then create other extension: Unetexto (Jointext)

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- Aquí tenemos el mismo tutorial en español. (Tutorial in Spanish)

-  http://kio4.com/appinventor/125_extensiones_crear.htm

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- To be continued.

In other post I will put a template file and other source codes.

- Regards.

[TimAI2]

Sets things up on Linux if you want to follow the tutorial:

##INSTALL LOCAL APPINVENTOR on LINUX (this with Xubuntu 16.04.3 LTS)

## All done in home directory (cd)

## Due to the paths chosen, had to use sudo to build and run

## replace USER with your username

## Open terminal:

## 1) Clone the AppInventor Sources

git clone --recursive https://github.com/mit-cml/appinventor-sources.git  << +500mb !!

## 2) Install dependencies and other items

sudo apt-get install ant

sudo apt-get install openjdk

sudo apt-get install lib32z1

sudo apt-get install lib32ncurses5

sudo apt-get install lib32stdc++6

sudo apt-get install libbz2-1.0  << not lib32bz2-1.0 as the howto suggests - superceded

sudo apt-get install adb

## 3) Set up Paths

export JAVA_HOME=/usr/local/build

export ANT_HOME=/usr/share/ant/adtools/java/jdk

export PATH=${PATH}:${ANT_HOME}/bin

## 4) Get and set appengine sdk

wget https://storage.googleapis.com/appengine-sdks/featured/appengine-java-sdk-1.9.58.zip  << +190mb !!

unzip appengine-java-sdk-1.9.58.zip

export PATH=$PATH:/home/USER/appengine-java-sdk-1.9.58/bin/

## 5) Create some directories

sudo mkdir /usr/local/build

sudo mkdir /usr/local/build/bin

sudo mkdir /usr/local/build/bin/java

## 6) Build Appinventor

cd appinventor-sources/appinventor

sudo ant clean

sudo ant MakeAuthKey

sudo ant              << took my machine @ 5 minutes

## 7) Run Local Appinventor

/home/USER/appengine-java-sdk-1.9.58/bin/dev_appserver.sh --port=8888 --address=0.0.0.0 /home/USER/appinventor-sources/appinventor/appengine/build/war/

localhost:8888 in browser

## 8) Run local Build Server

cd appinventor-sources/appinventor/buildserver

ant RunLocalBuildServer

sudo ant RunLocalBuildServer

localhost:9990/buildserver/vars    << gives info about build server

[Andres Daniel]

me sale este error

BlocksEditorHttpConstants:

BUILD FAILED

/appinventor-sources/appinventor/build.xml:16: The following error occurred while executing this line:

/appinventor-sources/appinventor/build-common.xml:325: The following error occurred while executing this line:

/appinventor-sources/appinventor/common/build.xml:170: The following error occurred while executing this line:

/appinventor-sources/appinventor/build-common.xml:118: Unable to find a javac compiler;

com.sun.tools.javac.Main is not on the classpath.

Perhaps JAVA_HOME does not point to the JDK.

It is currently set to "/usr/lib/jvm/java-8-openjdk-amd64/jre"

Total time: 1 second

andres@scw-51df30:/appinventor-sources/appinventor$

[Juan Antonio]

Hi Andrés, you text show this error...

Perhaps JAVA_HOME does not point to the JDK.

It is currently set to "/usr/lib/jvm/java-8-openjdk-amd64/jre"

perhaps system variable JAVA_HOME is bad configured.

try export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64/jre

I work extension with Windows not Linux.

[Juan Antonio]

Hi friends,

TEMPLATE CODE to BUILD EXTENSION

- file Plantilla.java is a Template to build a simple extension.

- It is a very simple extension, only is a didactic code.

- User set 

 textInput = Hola

 numberInput = 234

and extension return double number: 468 and this sentence by Event: Ya terminado Hola

- Copy, paste and try.

- Get template file in this link: http://kio4.com/appinventor/126_extensiones_plantilla.htm

Regards.

Juan Antonio Villalpando.