Develop Reference

ARCore 1.2 Unity Create AugmentedImageDatabase on the fly

I am trying to dynamically create an image database using arcores new image tracking feature.
Currently I have a server serving me image locations which I download to the persistent data path of my device. I use these images to then create new database entries like below:
Public Variables:
public AugmentedImageDatabase newBD;
public AugmentedImageDatabaseEntry newEntry;
Here I do regex matching to get the images from the datapath and convert them to texture2D's in order to populate the AugmentedImageDatabaseEntry values.
Regex r1 = new Regex(#"https?://s3-([^.]+).amazonaws.com/([^/]+)/([^/]+)/(.*)");
// Match the input for file name
Match match = r1.Match(input);
if (match.Success)
{
string v = match.Groups[4].Value;
RegexMatch = v;
Texture2D laodedTexture = LoadTextureToFile(v);
laodedTexture.EncodeToPNG();
AugmentedImageDatabaseEntry newEntry = new AugmentedImageDatabaseEntry(v, laodedTexture, Application.persistentDataPath + "/" + v);
newEntry.Name = v;
newEntry.Texture = laodedTexture;
newEntry.TextureGUID = Application.persistentDataPath + "/" + v;
Debug.Log(newEntry.Name);
Debug.Log(newEntry.Texture);
Debug.Log(newEntry.TextureGUID);
newBD.Add(newEntry);
}
To get this to work on android I had to modify the source of ARCore's unity implementation a little so that the database.Add() function would work outside of the editor.
All of this seems to work seamlessly as I don't get any errors yet.
Once I change scenes to the ARCore scene I instantiate an ARCore Camera and create a new sessionconfig which holds a reference to the database populated above.
Here is that code:
public class NewConfigSetup : MonoBehaviour {
public GameObject downloadManager;
public GameObject arcoreDevice;
// Use this for initialization
void Start () {
downloadManager = GameObject.Find("DownlaodManager");
TestModelGenerator generator = downloadManager.GetComponent<TestModelGenerator>();
GoogleARCore.ARCoreSessionConfig newconfig = new GoogleARCore.ARCoreSessionConfig();
GoogleARCore.ARCoreSessionConfig config = ScriptableObject.CreateInstance<GoogleARCore.ARCoreSessionConfig>();
config.AugmentedImageDatabase = generator.newBD;
Debug.Log("transfered db size --------------- " + config.AugmentedImageDatabase.Count);
arcoreDevice.GetComponent<GoogleARCore.ARCoreSession>().SessionConfig = config;
Instantiate(arcoreDevice,new Vector3(0,0,0), Quaternion.identity);
}
}
When I run in the editor, I dont get errors untill I view the database in the editor, thats when I get this error:
ERROR: flag '--input_image_path' is missing its argument; flag
description: Path of image to be evaluated. Currently only supports
*.png, *.jpg and *.jpeg.
When I debug and look in the memory of the AugmentedImageDatabase. Everything seems to be there and working fine. Also once I build for android I get no errors whatsoever, as well as when I use 'adb logcat -s Unity' in the command line, no exceptions are thrown.
Could this be a limitation with the new ARCore feature? Are the AugmentedImageDatabases not allowing for dynamic creation on android? If so than why are there built in functions for creating them?
I understand the features are brand new and there is not much documentation anywhere so any help would be greatly appreciated.

I posted an Issue on ARCore's Github page, and got a response that the feature you're talking about isn't yet exposed in the Unity API :
https://github.com/google-ar/arcore-unity-sdk/issues/256

Generate referral short links using Branch SDK android

I want to implement a referral system in my app using branch SDK. I want to generate a short link with my static custom endpoint (https://app.link/ABC123) for each user which can be shared by other users. I can do this by setting alias on LinkProperties. But using alias with BUO.showShareSheet gives an error.
Can I use an alias with BUO.showShareSheet?
Should the Canonical identifier unique for each URL?
Is it possible to set multiple channels using LinkProperties?
Does the same URL generate every time if all arguments are same for BUO & LinkProperties?

1. Can I use an alias with BUO.showShareSheet?
You can definitely use alias with the showShareSheet method. Here is the code I used to generate and share an alias link
final BranchUniversalObject branchUniversalObject = new BranchUniversalObject()
.setCanonicalIdentifier("/1234")
.setTitle("Test for alias")
.setContentDescription("Your friend has invited you to check out my app!") .setContentImageUrl("https://upload.wikimedia.org/wikipedia/commons/thumb/5/5a/Branch_Metrics_logo_color.png/1200px-Branch_Metrics_logo_color.png")
.addContentMetadata("var1", "abc")
.addContentMetadata("var2", "def");
LinkProperties linkProperties = new LinkProperties()
.setChannel("Facebook")
.setFeature("Sharing")
.setAlias("aliastest");
ShareSheetStyle ss = new ShareSheetStyle(MainActivity.this, "Check this out!", "This stuff is awesome: ")
.setCopyUrlStyle(ContextCompat.getDrawable(this, android.R.drawable.ic_menu_send), "Copy", "Added to clipboard")
.setMoreOptionStyle(ContextCompat.getDrawable(this, android.R.drawable.ic_menu_search), "Show more")
.addPreferredSharingOption(SharingHelper.SHARE_WITH.FACEBOOK)
.addPreferredSharingOption(SharingHelper.SHARE_WITH.EMAIL)
.addPreferredSharingOption(SharingHelper.SHARE_WITH.MESSAGE)
.addPreferredSharingOption(SharingHelper.SHARE_WITH.HANGOUT)
.setAsFullWidthStyle(true)
.setSharingTitle("Share With");
branchUniversalObject.showShareSheet(this, linkProperties, ss, new Branch.BranchLinkShareListener() {
#Override
public void onShareLinkDialogLaunched() {
}
#Override
public void onShareLinkDialogDismissed() {
}
#Override
public void onLinkShareResponse(String sharedLink, String sharedChannel, BranchError error) {
}
#Override
public void onChannelSelected(String channelName) {
}
});
But please note, if you try to generate a link with the same alias and different link parameters, you will receive an alias conflict error and the showShareSheet method would, in turn, give you an error.
2. Should the Canonical identifier unique for each URL?
The canonicalIdentifier or canonicalUrl parameter greatly improves the content analytics data Branch captures. Branch suggests that it should be unique to that piece of content. It, in turn, helps Branch dedupe across many instances of the same thing. Suitable options: a website with pathing, or a database with identifiers for entities.
3. Is it possible to set multiple channels using LinkProperties?
You cannot set multiple channels for a single link. The channel tag is used to signify the route that your link reaches users. Hence, there can be only one channel.
4. Does the same URL generate every time if all arguments are same for BUO & LinkProperties?
If all the BranchUniversalObject properties and link properties are exactly the same, the generateShortUrl and showShareSheet will return the same link.

Hide an NDEF record into the NDEF Message?

I have developped 2 Android applications. The first one, to write into an NFC tag, and the second to read the contents I have written .
This is what i did in the first application (WriteNFC)
private NdefRecord createRecord1(String data)
{
byte[] payload = data.getBytes(Charset.forName("UTF-8"));
byte[] empty = new byte[] {};
return new NdefRecord(NdefRecord.TNF_ABSOLUTE_URI, empty, empty, payload);
}
private NdefRecord createRecord2(String data)
{
byte[] payload = data.getBytes(Charset.forName("UTF-8"));
byte[] empty = new byte[] {};
return new NdefRecord(NdefRecord.TNF_ABSOLUTE_URI, payload, empty, empty);
}
And in the second application (ReadNFC)
NdefRecord cardRecord = msg.getRecords()[1];//Extract the second Record
String url_data = new String(cardRecord.getType());//Read data type
When I read with my own application (ReadNFC), of course I had on screen only the payload of the second Record, which I stored through "Record Type". But with a third-party application, especially that natively installed ("tag") -shown in photo-, It display correctly the first record, and for the second it's an empty field. How can I hide this field. Otherwise, how can I force the other third-party applications to not read the second record?

You simply cannot do that. Android will read the complete NDEF messages (i.e. all records) and pass it on in the Intent to an app.

Upps, it is no wonder this is happening, look at your code. First
return new NdefRecord(NdefRecord.TNF_ABSOLUTE_URI, empty, empty, payload);
then
return new NdefRecord(NdefRecord.TNF_ABSOLUTE_URI, payload, empty, empty);
So the 3rd party apps are really showing the correct data, you have a bug in your record creation.
The native NDEF support in android is somewhat crude (byte-array based), so I've written a library which helps in creating records - which you might find interesting. The above issue might be simple to resolve, but there are many other much more complex record types, so some help might come in handy ;-)
Edit: So if this is the preferred result, rather create an Unknown Record and put your 'secret' data as the payload - the will not be any good way for any 3rd party app to display that data - whereas the ID of the absolute URI Record certainly can be displayed by any NDEF-reading app (like mine?)

This third party app was bothersome to me, so I had to use foregroundDispatch to read the tag contents manually, there you have the freedom to read or not read anything you want.
This snippet is from the OnResume(). `
mNfcAdapter.enableForegroundDispatch(this, pendingIntent,
intentFiltersArray, techListsArray);
Toast.makeText(getApplicationContext(), "TAG disscovered",
Toast.LENGTH_LONG).show();
Parcelable[] rawMsgs = getIntent()
.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
if (rawMsgs != null) {
NdefMessage[] msgs = new NdefMessage[rawMsgs.length];
for (int i = 0; i < rawMsgs.length; i++) {
msgs[i] = (NdefMessage) rawMsgs[i];
setText=new String(msgs[i].getRecords()[0].getPayload());
}
mInfoText.setText(setText);
}
}`
Here I get payload of the 1st record.

BUS_BLOCKING_CALL_NOT_ALLOWED error in AllJoyn

I'm trying to use AllJoyn for my app, but when I'm trying to use code from sample (sample 13), I can't join to session and get error BUS_BLOCKING_CALL_NOT_ALLOWED.
bus.registerBusListener(new BusListener() {
#Override
public void foundAdvertisedName(String name,
short transport,
String namePrefix) {
short contactPort = CONTACT_PORT;
SessionOpts sessionOpts = new SessionOpts();
Mutable.IntegerValue sessionId = new Mutable.IntegerValue();
Status status = bus.joinSession("com.my.well.known.name", //here's error: status = BUS_BLOCKING_CALL_NOT_ALLOWED
contactPort,
sessionId,
sessionOpts,
new SessionListener());
bus.cancelAdvertiseName("com.my.well.known.name",SessionOpts.TRANSPORT_ANY);
}
});
This code is from sample and I have no idea what's wrong with it. Can you help me?
If necessary, here's full code: http://pastebin.com/f1sD7RtK
I'm trying to create new channel and connect to it automatically, without user's participation.
Also I'll be very grateful for any good advices or samples.

Try calling bus.enableConcurrentCallbacks() prior to calling bus.joinSession(...) in the foundAdvertisedName method.
This will allow AllJoyn to dispatch an additional callback while the current one, foundAdvertisedName, is still executing.
Here's a link to the documentation that explains what is happening.

How to send SharedObject Array data to PHP WS for DB Query (Flex)

I am currently developing an Android application using Flex 4.5.1 and I am having an issue when trying to pass data that I have stored in a SharedObject array to my Web Service for a Database query. the code below shows how I am storing the data in the SharedObject:
var so:SharedObject = SharedObject.getLocal("app");
public var prefsArray:ArrayCollection = new ArrayCollection(so.data.prefs);
protected function prefs_btn_click(event:MouseEvent):void
{
prefsArray.source.push(getFrsByIDResult.lastResult.id);
so.data.prefs = [prefsArray];
var flushStatus:String = so.flush();
if (flushStatus != null) {
switch(flushStatus) {
case SharedObjectFlushStatus.PENDING:
so.addEventListener(NetStatusEvent.NET_STATUS,
onFlushStatus);
break;
case SharedObjectFlushStatus.FLUSHED:
trace("success");
break;
}
}
}
protected function onFlushStatus(event:NetStatusEvent):void
{
trace(event.info.code);
}
I have tested the SharedObject to see if the information is being entered into it correctly and all seems fine. Now I have used the code below in order to retrieve the data from the SharedObject and try and send it to the PHP web Service to run the DB query.
var so:SharedObject = SharedObject.getLocal("app");
var arrCol:ArrayCollection = new ArrayCollection(so.data.prefs);
var str:String = new String(arrCol.toString());
protected function list_creationCompleteHandler(event:FlexEvent):void
{
getPrefsByprefIdsResult.token = prefsService.getPrefsByPrefIds(so.data.prefs);
}
I have tested the Webservice in Flex and have it configured to recieve an Array of Ints (int[]) and it works when i run a test operation on it with two dummy values. However when I try to use the code above to pass the Web Service the Shared Object data I get this error:
TypeError: Error #1034: Type Coercion failed: cannot convert []#97e97e1 to mx.collections.ArrayCollection.
at views::**************/list_creationCompleteHandler()[C:\Users\Jack\Adobe Flash Builder 4.5\****************\src\views\*******************.mxml:25]
at views::*********************/__list_creationComplete()[C:\Users\Jack\Adobe Flash Builder 4.5\****************\src\views\***************.mxml:94]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\core\UIComponent.as:13128]
at mx.core::UIComponent/set initialized()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\core\UIComponent.as:1818]
at mx.managers::LayoutManager/validateClient()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1090]
at mx.core::UIComponent/validateNow()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\core\UIComponent.as:8067]
at spark.components::ViewNavigator/commitNavigatorAction()[E:\dev\4.5.1\frameworks\projects\mobilecomponents\src\spark\components\ViewNavigator.as:1878]
at spark.components::ViewNavigator/commitProperties()[E:\dev\4.5.1\frameworks\projects\mobilecomponents\src\spark\components\ViewNavigator.as:1236]
at mx.core::UIComponent/validateProperties()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\core\UIComponent.as:8209]
at mx.managers::LayoutManager/validateProperties()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\managers\LayoutManager.as:597]
at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\managers\LayoutManager.as:783]
at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1180]
I have replaced certain filenames and locations with *'s to protect the work i am doing, but can someone please help me with this issues as I believe it has to be something simple???
Thanks
ok so let me explain in more detail. This is being designed for an Android app like I said, but image what I am trying to do is to store Bookmarks persistently using the Local Shared Object.
The first chunck of code you see above is designed to create the LSO attribute for the bookmark i want to create and imagine that there can be more than one bookmark set at different times like in a web browser. The only way i could find to do this was to store these items/details in an array which I retrieve and then update before saving back to the LSO and saving.
The second piece of code related to imagine a "Bookmarks Page" with a list of all the content that I have bookmarked. Now what I wanted to happen was thta I would be able to call up the LSO attribute which held the id's of the bookmarks and then load up thier details in a list format.
I have managed to create the LSO and store the bookmark deatils in and allow them to be updated and entries added. Also I have made sure that the PHP code that I have pulls back all the database objects relating to the array of id's and this has been tested using flex. The only thing that I cant seem to do is to pass the id's to the PHP web service file. The code in the Web Service file is below if that helps:
public function getPrefsByPrefIds($PrefIds) {
$stmt = mysqli_prepare($this->connection, "SELECT * FROM $this->tablename WHERE $this->tablename.id IN(" .implode(",", $PrefIds). ")");
$this->throwExceptionOnError();
mysqli_stmt_execute($stmt);
$this->throwExceptionOnError();
$rows = array();
mysqli_stmt_bind_result($stmt, $row->id, $row->name, $row->desc);
while (mysqli_stmt_fetch($stmt)) {
$rows[] = $row;
$row = new stdClass();
mysqli_stmt_bind_result($stmt, $row->id, $row->name, $row->desc);
}
mysqli_stmt_free_result($stmt);
mysqli_close($this->connection);
return $rows;
}
Yes I had already tried that but thanks. I have made some more progress on my own as I have been experimenting with the different types of objects that can be stored in SharedObjects. I have managed to get the solution part working with this code:
This code is designed to capture the boomark info and store it in an arrayCollection before transferring it to a bytesArray and saving
var so:SharedObject = SharedObject.getLocal("app");
public var prefArray:ArrayCollection = new ArrayCollection(so.data.prefs);
protected function prefs_btn_click(event:MouseEvent):void
{
prefArray.source.push(getCompaniesByIDResult.lastResult.id);
so.data.prefs = [prefArray];
var bytes:ByteArray = new ByteArray();
bytes.writeObject(prefArray);
so.data.ac = bytes;
var flushStatus:String = so.flush();
if (flushStatus != null) {
switch(flushStatus) {
case SharedObjectFlushStatus.PENDING:
so.addEventListener(NetStatusEvent.NET_STATUS,
onFlushStatus);
break;
case SharedObjectFlushStatus.FLUSHED:
trace("success");
break;
}
}
}
protected function onFlushStatus(event:NetStatusEvent):void
{
trace(event.info.code);
}
This next code is the designed to retrieve that information from the SahredObjects bytesArray and put it back into an Array Collection
var so:SharedObject = SharedObject.getLocal("app");
var ba:ByteArray = so.data.ac as ByteArray;
var ac:ArrayCollection;
protected function list_creationCompleteHandler(event:FlexEvent):void
{
ba.position = 0;
ac = ba.readObject() as ArrayCollection;
getPrefsByPrefIdsResult.token = prefsService.getPrefsByPrefIds(ac);
}
however as I have said this works in a small way only as if I store only one Bookmark (id) for an item and then go to the bookmarks list the details for that bookark are successfully retrieved, however if I save more than one Bookmark(2 or more id's) the page will not load the details, i do not get an error but I believe it is hanging because it is looking for say id's "1,2" instead of "1" and "2" but i dont know why this is or how to resolve this. I appreciate the advice I have been given but am finding it hard there is no one who can help me with this issue and I am having to do various experiemnts with the code. Can someone please help me with this I would really appreciate it :-) Thanks