Packaging a native extension (Example batch file with all the options necessary to make one)

January 5, 2013

There has been a lot of questions and confusion on actually writing your batch file to compile/package your ANE file. Well i have decided to create a prototype of the batch file and share it here on my blog.

Your .bat file contents are as below.

set adt_directory=C:Program FilesAdobeAdobe Flash Builder 4.6sdks4.6.0bin
set root_directory=C:Projects
set library_directory=%root_directory%NativeExtLibrary
set native_directory=%root_directory%NativeExt
set signing_options=-storetype pkcs12 -keystore "C:Projectsp12key.p12" -tsa none
set dest_ANE=%root_directory%nativeExtPackagingANE.ane
set extension_XML=%library_directory%srcextension.xml
set library_SWC=%library_directory%binNativeExtLibrary.swc
set SWF_directory=%library_directory%binNativeExtLibrary
"%adt_directory%"/adt -package %signing_options% -target ane "%dest_ANE%" "%extension_XML%" -swc "%library_SWC%" -platform Android-ARM -C "%SWF_directory%" library.swf -C "%native_directory%" NativeExt.jar

Below explaining the variables in your bat file.

root_directory – root folder of your flex projects.
library_directory – location of your Native extension wrapper Flex library project.
native_directory – location of your native extension project(for Android-ARM it will be android project location).
signing_options – signed certificate for your extension and its options (-tsa none option to discard timestamp).
dest_ANE – location to create your ane file.
extension_XML – location of Native extension wrapper Flex library project extension descriptor file.
library_SWC – location of your Native extension wrapper Flex library project compilation file.
SWF_directory – location of your library.swf file.
Android-ARM – packaging ane for Android

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Image Cropping in Flex

January 31, 2011

Even though there are many posts on this particular topic still there are many ???, then i thought may be i can write about it, so lets get started.

Lets do things in steps.

  1. Load Image in to Flex App
  2. Convert it to Bitmap and BitmapData objects.
  3. Crop Image using BitmapData object

1.Load Image in to Flex App

private var imageLoader:Loader = new Loader();

private function fnInit():void
imageLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, loadImageComplete);
imageLoader.load(new URLRequest(“assets/flower.png”));

2.Convert it to Bitmap and BitmapData objects

private var bitmapImage:Bitmap;
private var bitmapDataImage:BitmapData;

//Event.COMPLETE eventHandler for Loader

private function loadImageComplete(e:Event):void
bitmapImage = Bitmap(;
bitmapDataImage = Bitmap(bitmapImage).bitmapData.clone();

3.Crop Image using BitmapData object
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Sorting Date’s on ArrayCollection in Flex

November 16, 2009

First things first, read about the mx.collections.Sort Class before going in to the code below.

About the Post,suppose i have a AC[ArrayCollection] like below;

private var arrClldetails:ArrayCollection = new ArrayCollection([
{Fname:”Kranthi”, Lname:”Kata”, dob:”21 Sep 79″},
{Fname:”Vasanth”, Lname:”Lola”, dob:”11 Jun 80″},
{Fname:”Manoj”, Lname:”Pati”, dob:”16 July 81″},
{Fname:”John McClain”, Lname:”Mela”, dob:”15 Feb 72″},
{Fname:”Ross”, Lname:”Geller”, dob:”02 Jan 74″},
{Fname:”Chandler”, Lname:”Bing”, dob:”18 Oct 76″}

Now i want to Sort the “dob” Date field in the AC.,so for this i need to
write a compareFunction for Sort which in turn is applied to the AC like below,

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Tracing Childrens of a Container in Flex

November 9, 2009

A Container in Flex is one that controls the layout characteristics of child components and which extends the Container base Class like the famous Panel,Canvas,ViewStack,TabNavigator,…

Container contains childrens or Sub Components or Sub Containers[Container in a Container], and so on.Childrens/child components in a Container are all are created using the creationPolicy setting of that Container.In case of sub containers, outer Containers are created before the inner one’s.And creation can be altered by setting the creationPolicy.

So now we know some basics of Container its time for the Topic.

We can manage the child components of a Container by using its predefined methods,like below..
1.Container.getChildren() – returns an Array of child components.
var arr:Array=Container.getChildren();
2.Container.getChildAt(index:int) – returns an instance of the DisplayObject at that creation index,which we can cast to required.
var obj:Object=Container.getChildAt(0);
3.Container.removeChildAt(index:int) – removes child at that creation index
var disObj:DisplayObject=Container.removeChildAt(0);
4.Container.removeAllChildren() – as the name specifies
….so on

In the below download code i have implemented all these methods with a Panel.Enjoy the Post.

Download code.

Assign a menu item(on right click menu list) to DataGrid control in Flex.

October 9, 2009

OK, First thing to do, read about flash.ui.ContextMenu Class.
Some points..
->In SWF content, any object that inherits from InteractiveObject can be given a context menu by assigning a menu object to its contextMenu property.
->In Flex, only top-level components in the application can have context menus.
->Flash Player has three types of context menus:standard menu ,the edit menu and an error menu.Only the standard and edit menus can be modified with the ContextMenu class.

so first create a ContextMenu for the DataGrid like below..

private function fnDgContextMenu():ContextMenu
var newContextMenu:ContextMenu = new ContextMenu();
var newContextMenuItem:ContextMenuItem=new ContextMenuItem(“Sort”);
return newContextMenu;

now assign it to DataGrid.
dg.contextMenu=fnDgContextMenu(); // here dg is the “id” of the DataGrid.check the code below.


Download code.

Enjoy the post.

Tips on MenuBar control and its dataProvider in flex

September 25, 2009

Suppose we have a MenuBar and its dataPovider as below.

<mx:MenuBar id=”myMenu” dataProvider=”{xmlLst}” labelField=”@label” itemClick=”fnItemClick(event)” />

<mx:XMLList id=”xmlLst”>
        <root label=”year”>
            <menuitem label=”2001″ enabled=”true”/>
            <menuitem label=”2002″ enabled=”false”/>
            <menuitem label=”2003″ enabled=”true”/>
            <menuitem label=”2004″ enabled=”false”/>
            <menuitem label=”2005″ enabled=”true”/>

and the itemClick handler below
private function fnItemClick(event:MenuEvent):void
//code goes here on itemClick
Desc: The MenuBar displays the XMLList dataProvider with all the years as menuitems[because labelField=”@label”], and has a handler for itemClick “fnItemClick”.

Now the tips..

1.To set enabled=true for the year 2002.
//this is like traversing the XMLList.
//this will reflect changes both to XMLList and MenuBar
2.To set for all enabled=true.
//here we got to traverse the XMLList and change the data.
for each(var xml:XML in xmlLst.menuitem)
3.To set enabled=false for selected Item.
//in the itemClick handler use the below code

Things to remember:- while accessing attributes of XML we got to use ‘@’ before the attribute name, not neccessary if it is an Object.

Download code.

Note:- Examples or code you have seen on this blog so far are related to Flex 3 SDK.

Custom Component: Indicator Label for download

August 19, 2009

As you all know that i made a custom component called Indicator Label from this post.Now its time for me to release the component, so follow this link and fill out the form and then i will send you the component through mail.I need this information only to keep track of my downloads, nothing less and nothing more.

Enjoy the component.