How to create an Extension

[Creator_Kannan (Kannan)]

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[Srrazmi (Web And App Developer)]

@Sander

Environmental Variables:

Which User Or System

[Vedang (Indian boy)]

System variables

[Srrazmi (Web And App Developer)]

@Sander

nvironmental Variables:

And This User Or System ?

[FahadAhmad]

Already told!

@Vedang

System variables

[sonumohammad333 (Sonu Mohammad)]

@Srrazmi

Can Anyone Please Set Up My PC For Creating App Inventor I have Downloaded All Required Files But I Am Not Able To Set Variables

Read the first guide…

@Shreyash

Those who looking for a bit more comprehensive guide on extension development, check out this two articles by me on Medium:

• Configuring your computer to build App Inventor 2 extensions
• Writing your first App Inventor 2 and Kodular extension

[Srrazmi (Web And App Developer)]

I Have Readed Many Times But Unable To Set Up

[sonumohammad333 (Sonu Mohammad)]

Me too
Before JAVA was installed
While installing ANT Apache
Something might have happened

‘java’ is not recognized as an internal or external command,
operable program or batch file.

[sonumohammad333 (Sonu Mohammad)]

It will be awesome
If Appy Builder Code Editor support third party libraries

[AvTaar]

Can anyone give me some basics extension Ideas for beginners ?

[Srrazmi (Web And App Developer)]

I Have Set Variable And Still I Am Getting Error Please Check it Out And Point Me On My Mistake

Path

Error Is

PS D:\appinventor-sources-master\appinventor> ant extensions
Buildfile: D:\appinventor-sources-master\appinventor\build.xml

extensions:

clean:

common_CommonVersion:

init:

CommonVersion:

BUILD FAILED
D:\appinventor-sources-master\appinventor\build.xml:46: The following error occurred while executing this line:
D:\appinventor-sources-master\appinventor\build-common.xml:304: The following error occurred while executing this line:
D:\appinventor-sources-master\appinventor\common\build.xml:99: Execute failed: java.io.IOException: Cannot run program "git" (in directory "D:\appinventor-sources-master\appinventor\common"): CreateProcess error=2, The system cannot find the file specified
        at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1128)
        at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1071)
        at java.base/java.lang.Runtime.exec(Runtime.java:590)
        at org.apache.tools.ant.taskdefs.launcher.Java13CommandLauncher.exec(Java13CommandLauncher.java:58)
        at org.apache.tools.ant.taskdefs.Execute.launch(Execute.java:426)
        at org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:440)
        at org.apache.tools.ant.taskdefs.ExecTask.runExecute(ExecTask.java:630)
        at org.apache.tools.ant.taskdefs.ExecTask.runExec(ExecTask.java:671)
        at org.apache.tools.ant.taskdefs.ExecTask.execute(ExecTask.java:497)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293)
        at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:564)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:352)
        at org.apache.tools.ant.Target.execute(Target.java:437)
        at org.apache.tools.ant.Target.performTasks(Target.java:458)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1406)
        at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:36)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1261)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:442)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293)
        at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:564)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:352)
        at org.apache.tools.ant.Target.execute(Target.java:437)
        at org.apache.tools.ant.Target.performTasks(Target.java:458)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1406)
        at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(SingleCheckExecutor.java:36)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1261)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:442)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:293)
        at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:564)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
        at org.apache.tools.ant.Task.perform(Task.java:352)
        at org.apache.tools.ant.Target.execute(Target.java:437)
        at org.apache.tools.ant.Target.performTasks(Target.java:458)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1406)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1377)
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1261)
        at org.apache.tools.ant.Main.runBuild(Main.java:857)
        at org.apache.tools.ant.Main.startAnt(Main.java:236)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:287)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:112)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified
        at java.base/java.lang.ProcessImpl.create(Native Method)
        at java.base/java.lang.ProcessImpl.<init>(ProcessImpl.java:483)
        at java.base/java.lang.ProcessImpl.start(ProcessImpl.java:158)
        at java.base/java.lang.ProcessBuilder.start(ProcessBuilder.java:1107)
        ... 48 more

Total time: 1 second
PS D:\appinventor-sources-master\appinventor>

Update : Now It’s Working Fine After Installing Gitbash

[Silver (Silver SY)]

@Srrazmi

you can try extension-template:

mit-cml/extension-template

[Rogerio_Rios (Professional Support)]

I followed this tutorial and it worked 100% on the first try.

Learn how to create extensions

Hey everybody, A few days ago, I published two articles on how to develop extensions for Kodular (and, AI2). So, if you too want to get started with the extension development, these articles are definitely going to help you out: Configuring your computer to build App Inventor 2 extensions Writing your first App Inventor 2 and Kodular extension Go, check them out!

[Akshat_Rana (Akshat Developer)]

Is there any tutorial availabe on youtube or any other platform ?

[Django_s_Android_App (Django)]

Mostly Everything you will need to know is already mentioned in this topic. Don’t be lazy and just read the whole posts​

[Akshat_Rana (Akshat Developer)]

I think we can better understand by video not by just text

[tarun_sai]

wonderful tutorial great

[Srrazmi (Web And App Developer)]

I Am Just Trying To Create Simple Listview But I Am Not Success Please Help Me

My Java Code

    package com.srrazmi.List;

     import android.content.Context;
import com.google.appinventor.components.common.ComponentCategory;
 import com.google.appinventor.components.annotations.*;
import com.google.appinventor.components.runtime.*;
import android.app.Activity;
import android.content.Intent;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import com.google.appinventor.components.common.YaVersion;
import com.google.appinventor.components.runtime.util.ElementsUtil;
import com.google.appinventor.components.runtime.util.YailList;


    @DesignerComponent(version = 1,  description = "Simple Extension For List",
            category = ComponentCategory.EXTENSION,
            nonVisible = true,   iconName = "http://appyBuilder.com/extensions/icons/extension.png")
    @SimpleObject(external = true)
    public class List extends AndroidNonvisibleComponent {
        private ComponentContainer container;
        private Context context; //Added
        private Activity activity; //Added
        /**
         * @param container container, component will be placed in
         */
        public List(ComponentContainer container) {
            super(container.$form());
            this.container = container;
            context = (Context) container.$context(); //Added
           
        }
      

    @SimpleFunction(description = "Simple ListView For Learning ")
      public void MakeList(YailList list , AndroidViewComponent arragment) {
           View view = arragment.getView();
        adapter = new ArrayAdapter<Spannable>(container.$context(), android.R.layout.simple_list_item_1,
            list);
        view.setAdapter(adapter);

       
      }

    }

Don’t Suggest Me That List view Is Already Available , Because I Am Just Trying To Learn

[indianplans (S.A. Rahim)]

I Got the success message. Now how to start building the extensions? help pls