How do you import a second .java class to MIT App Inventor extension?

Open Source Development Extension Development
10

Yes

import org.apache.commons.math3.distribution.NormalDistribution;

11

excellent! It worked!

12 
AndroidRuntime:
    [mkdir] Created dir: /home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/build/classes/AndroidRuntime
    [javac] Compiling 366 source files to /home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/build/classes/AndroidRuntime
    [javac] warning: [options] bootstrap class path not set in conjunction with -source 7
    [javac] Note: Wrote file file:///home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/build/classes/AndroidRuntime/simple_components.json
    [javac] Note: Wrote file file:///home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/build/classes/AndroidRuntime/simple_components.txt
    [javac] Note: Wrote file file:///home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/build/classes/AndroidRuntime/simple_components_build_info.json
    [javac] Note: Wrote file file:///home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/build/classes/AndroidRuntime/AutogeneratedOdeMessages.java
    [javac] Note: Wrote file file:///home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/build/classes/AndroidRuntime/ComponentsTranslation.java
    [javac] /home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/src/io/kodular/FinancialCalculator.java:38: error: package org.apache.commons.math3.distribution does not exist
    [javac] import org.apache.commons.math3.distribution.NormalDistribution;
    [javac]                                             ^
    [javac] /home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/src/io/kodular/FinancialCalculator.java:39: error: package org.apache.commons.math3.distribution does not exist
    [javac] import org.apache.commons.math3.distribution.ExponentialDistribution;
    [javac]                                             ^
    [javac] /home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/src/io/kodular/FinancialCalculator.java:40: error: package org.apache.commons.math3.distribution does not exist
    [javac] import org.apache.commons.math3.distribution.PoissonDistribution;
    [javac]                                             ^
    [javac] Note: Some input files use or override a deprecated API.
    [javac] Note: Recompile with -Xlint:deprecation for details.
    [javac] 3 errors
    [javac] 1 warning

BUILD FAILED
/home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/build.xml:73: The following error occurred while executing this line:
/home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/components/build.xml:228: The following error occurred while executing this line:
/home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/build-common.xml:125: Compile failed; see the compiler error output for details.

import org.apache.commons.math3.distribution.NormalDistribution;
import org.apache.commons.math3.distribution.ExponentialDistribution;
import org.apache.commons.math3.distribution.PoissonDistribution;

@DesignerComponent(
        version = 1,
        description = "Extension to assist financial and statistical calculations",
        category = ComponentCategory.EXTENSION,
        nonVisible = true,
        iconName = "images/extension.png"
)
@UsesLibraries(libraries = "commons-math3-3.4.jar")
@SimpleObject(external = true)
public class FinancialCalculator extends AndroidNonvisibleComponent {

JAR file: https://repo1.maven.org/maven2/org/apache/commons/commons-math3/3.4/commons-math3-3.4.jar

13

I don't know where you placed the jar file.

14

depspath
depspath1112×191 11.8 KB

common_math3
common_math31145×131 10 KB

All files: kodular - Google Drive
in deps

15

You cannot create the deps folder. This folder already exists in appinventor-sources, you need to add your library to it.

home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/build/components/deps/

1 Like
16

Please see the Extensions document about how to work with external libraries

http://ai2.appinventor.mit.edu/reference/other/extensions.html

Taifun

1 Like
17

I did this but I still get the error "error: package org.apache.commons.math3.distribution does not exist"

18

I already solved this part :pray:

19

What was the reason?

20

These files are deleted every time I run the "ant extensions" command. This is a problem?

home/iaiaia/Documentos/Kodular/CriarExtensoes/appinventor-sources/appinventor/build/components/deps/
21

It is not possible to delete files from the deps folder because all the jar libraries built into appinventor are in this directory.

22

I will record here

23

Read chapter 4h here

Taifun

24
25

great!

26

I never used "ant clean", so it didn't remove my libraries. If you want to use "ant clean" you will have to copy the libraries using entries in build.xml as in the description provided by Taifun.

28

It looks like you have been successful meanwhile...

Taifun

29

Yes! Everything working! Thank you very much for the tips.

30

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