Android APK Expansion Files for Apps over 50MB

Question

Hello Support,
We are building a new version of an app pubished on PlayStore (built with Adobe AIR) and need to embed higher resolution images. This results in my app apk file size which is over 100 MB.
Google allows to upload apks that are <= 50 MB. For apps which require more storage capacity than this limit, expansion files are needed.
Can you please inform us about how to incorporate these expansion files with an AIR app?
Is there a native extension or a built-in feature to prepare the expansion files and surpass the limit?
I've looked in the forums & there is no definite answer or solution.
If this is not possible at present, can you please add it to the wishlist for the next version of Adobe AIR SDK? Or perhaps, release a free/paid native-extension which enables this.
Thanks!

Answer 1

Yes I got it working this morning, honestly I've got no idea what did the trick, as I did nothing. My only guess right now is I reuploaded new versions of my APK and OBB files on the Android Developer Console yesterday, and maybe it could have taken this long to "refresh".
Basically right now if I install a fresh apk on the device, it will downloads and unzip my obb. If I kill the app and relaunch, it validates if my obb is still there and continues, when before a simple message box with my app name would stay displayed forever.
Here's my app code based on the exemple from http://extensionsforair.com/extensions/apk-expansion-files/ :
public class Main extends Sprite
                    public function Main():void
                              stage.scaleMode = StageScaleMode.NO_SCALE;
                              stage.align = StageAlign.TOP_LEFT;
                              addEventListener(Event.ADDED_TO_STAGE, onAddedToStage);
                    private function onAddedToStage(evt:Event):void
                              addChild(Console.GetInstance());
                              Console.Trace("Start");
                              var apkExpansionFiles:APKExpansionFiles = new APKExpansionFiles();
                              apkExpansionFiles.addEventListener(APKCompleteEvent.APK_COMPLETE, onComplete);
                              var BASE64_PUBLIC_KEY:String = "your_public_Key";
                              var outputDir:String = "/Android/data/"; // the outpout folder
                              var mainVersion:String = "1302000"; // the version of the APK that the file was uploaded
                              var mainSize:String = "10639971"; // the length of the file in bytes
                              var mainUnzip:Boolean = true; // unzip the file
                              //var patchVersion:String=”1000024″; // the version of the APK that the file was uploaded
                              //var patchSize:String=”14923834″; // the length of the file in bytes
                              //var patchUnzip:Boolean=true; // unzip the file
                              apkExpansionFiles.expansionFilesDelivered(BASE64_PUBLIC_KEY, mainVersion, mainSize, mainUnzip, outputDir); // only main obb file
                              //apkExpansionFiles.expansionFilesDelivered(BASE64_PUBLIC_KEY, mainVersion, mainSize, mainUnzip, outputDir, patchVersion, patchSize, patchUnzip); // main and patch obb files
                    private function onComplete(e:APKCompleteEvent):void
                              Console.Trace("onComplete");
                              for (var key:Object in e.params)
                                        Console.Trace("Key : " + key + ", Value : " + e.params[key]);
                              var conteneurImage:Loader = new Loader();
                              var fileName:String = e.params.outputDirMain + "asset/2048-2.png";
                              Console.Trace("File name = " + fileName);
                              var file:File = new File(fileName); // the outpout Main folder
                              Console.Trace("File exists? = " + file.exists);
                              //var file:File = new File(e.params.outputDirPatch+”myImage.jpg”);    // the outpout Patch folder
                              var image:URLRequest = new URLRequest(file.url);
                              conteneurImage.load(image);
                              conteneurImage.scaleX = 0.3;
                              conteneurImage.scaleY = 0.3;
                              var secondImageContainer:Loader = new Loader();
                              fileName = e.params.outputDirMain + "asset/2048.png";
                              file = new File(fileName);
                              image = new URLRequest(file.url);
                              secondImageContainer.load(image);
                              secondImageContainer.scaleX = 0.3;
                              secondImageContainer.scaleY = 0.3;
                              secondImageContainer.y = 614;
                              this.addChildAt(conteneurImage, 0);
                              this.addChildAt(secondImageContainer, 1);