I am creating an app on iOS in Flash Builder, with as3.
The app uses the Starling plugin: http://wiki.starling-framework.org/start
My app allows users to take photos and customise them. When attempting to access the camera or camera roll on iOS 8, I get the error message "The application lost the device context!".
On Android, I can get around this problem with this line:
Starling.handleLostContext = true;
But I am told that iOS should never lose context (and I haven't seen it lose context on iOS 7 or below).
If I include that line in iOS 8, the application crashes at around the same point, but in this case the app crashes completely, and returns me to the home screen rather than displaying the previous message.
I have heard there are restrictions on iOS 8 with regards to the use of 64 bit/32 bit plugins and extensions, but I am not using any ANEs in this particular app. Are there any other areas where 32-bit could be causing problems or is that strictly related to ANEs?
I don't get this error on iOS 7 or below or Android, unless I set handleLostContext to false.
Adobe Scout provides no error message.
Any help would be appreciated.
UPDATE:
This code calls in the camera functionality:
var cameraRoll:CameraRoll = new CameraRoll();
if(CameraRoll.supportsBrowseForImage) {
trace("camera rolling");
cameraRoll.addEventListener(MediaEvent.SELECT, imageSelected);
cameraRoll.addEventListener(flash.events.Event.CANCEL, browseCanceled);
cameraRoll.addEventListener(flash.events.ErrorEvent.ERROR, galleryMediaError);
cameraRoll.browseForImage();
} else {
var alert:Alert = Alert.show("Image browsing is not supported on this device.", "Error", new ListCollection([{label:"OK"}]));
}
UPDATE 2:
I've switched from AIR SDK 17 to 16, and it is now more stable but has similar issues
There is a known issue with the camera roll in iOS which will cause stage3d to lose context. Your options:
Set Starling.handleLostContext = true, it is possible to lose context in iOS.
Find an ANE (Supposedly these exist) that handles the camera roll without losing context.
More Information:
http://forum.starling-framework.org/topic/starling-and-cameraui#post-77339
I can confirm on ios 8.3 a Context3D is not lost when opening the CameraRoll using AIR 18.
Make sure you are using AIR 18.
Make sure you are using the latest Starling Version.
If the problem persist it's likely Starling is the cause.
Either report the problem and wait for an update.
Do not use Starling when requesting the CameraRoll (turn Starling off and Display normal Bitmaps).
Don't use Starling and use another engine or create your own.
Related
I have an application that uses MapBox's API to stylize the underlying map which uses Google Places. This all worked perfectly fine when running in IOS 7+, but when I try testing this in IOS 8, it immediately crashes with the following error message:
Terminating app due to uncaught exception NSInternalInconsistencyException, reason: 'The layout constraints still need update after sending -updateConstraints to MapView at {0,0}-{320x444}.
RMMapView or one of its superclasses may have overridden -updateConstraints without calling super. Or, something may have dirtied layout constraints in the middle of updating them. Both are programming errors.'
I have been looking around the Web and Stack for a while but have been unable to find anything helpful unfortunately. Any suggestions?
I deleted all Mapbox framework / headers / lib from my project and reinstalled the latest (1.4.1) mapbox static library (libMapbox.a) and the Headers, and everything was ok after that without changing a line of my code.
I was trying to recreate the simle Text to Speech example used on the MSDN website. However whenever the code came to create the instance of the SpeechSynthesizer class it failed with a Unauthorised Acception error when running on the WP8.1 emulator. I currently do not have an actual device to test on to see if this makes a difference.
My code was simply:
private async void TTS()
{
// The media object for controlling and playing audio.
MediaElement mediaElement = new MediaElement();
// The object for controlling the speech synthesis engine (voice).
var synth = new Windows.Media.SpeechSynthesis.SpeechSynthesizer();
// Generate the audio stream from plain text.
SpeechSynthesisStream stream = await synth.SynthesizeTextToStreamAsync("Hello World");
// Send the stream to the media object.
mediaElement.SetSource(stream, stream.ContentType);
mediaElement.Play();
}
I know there was an issue with the SpeechSynthesizer in Windows 8.1, and I found solutions to this when looking to fix the problem, but found little about the problem with WP8.1 SpeechSynthesizer. Has anybody else came across this problem and found a fix?
You should add one DeviceCapability in Package.appxmanifest file:
In DeviceCapability Tab, check the microphone, because it will provides access to the microphone’s audio feed, which allows the app to record audio from connected microphones.
Look at this library: App capability declarations (Windows Runtime apps)
I'm trying to capture audio using WASAPI. My code is largely based on the ChatterBox VoIP sample app. I'm getting audio buffers, but they are all silent (flagged AUDCLNT_BUFFERFLAGS_SILENT).
I'm using Visual Studio Express 2012 for Windows Phone. Running on the emulator.
I had the exact same problem and managed to reproduce it in the ChatterBox sample app if I set Visual Studio to native debugging and at any point stepped through the code.
Also, closing the App without going through the "Stop" procedure and stopping the AudioClient will require you to restart the emulator/device before being able to capture audio data again.
It nearly drove me nuts before I figured out the before mentioned problems but I finally got it working.
So..
1. Be sure to NOT do native debugging
2. Always call IAudioClient->Stop(); before terminating the App.
3. Make sure you pass the correct parameters to IAudioClient->Initialize();
I've included a piece of code that works 100% of the time for me. I've left out error checking for clarity..
LPCWSTR pwstrDefaultCaptureDeviceId =
GetDefaultAudioCaptureId(AudioDeviceRole::Communications);
HRESULT hr = ActivateAudioInterface(pwstrDefaultCaptureDeviceId,
__uuidof(IAudioClient2), (void**)&m_pAudioClient);
hr = m_pAudioClient->GetMixFormat(&m_pwfx);
m_frameSizeInBytes = (m_pwfx->wBitsPerSample / 8) * m_pwfx->nChannels;
hr = m_pAudioClient->Initialize(AUDCLNT_SHAREMODE_SHARED,
AUDCLNT_STREAMFLAGS_NOPERSIST | AUDCLNT_STREAMFLAGS_EVENTCALLBACK,
latency * 10000, 0, m_pwfx, NULL);
hr = m_pAudioClient->SetEventHandle(m_hCaptureEvent);
hr = m_pAudioClient->GetService(__uuidof(IAudioCaptureClient),
(void**)&m_pCaptureClient);
And that's it.. Before calling this code I've started a worker thread that will listen to m_hCaptureEvent and call IAudioCaptureClient->GetBuffer(); whenever the capture event is triggered.
Of course using Microsoft.XNA.Audio.Microphone works fine to, but it's not always an option to reference the XNA framework.. :)
It was a really annoying problem which waste about 2 complete days of mine.My problem was solved by setting AudioClientProperties.eCatagory to AudioCategory_Communications instead of AudioCategory_Other.
After this long try and error period I am not sure that the problem won't repeat in the future because the API doesn't act very stable and every run may return a different result.
Edit:Yeah my guess was true.Restarting the wp emulator makes the buffer silent again.But changing the AudioClientProperties.eCatagory back to AudioCategory_Other again solve it.I still don't know what is wrong with it and what is the final solution.
Again I encounter the same problem and this time commenting (removing) the
properties.eCategory = AudioCategory_Communications;
solve the problem.
I can add my piece of advice for Windows Phone 8.1.
I made the following experiment.
Open capture device. Buffers are not silent.
Open render device with AudioDeviceRole::Communications. Buffers immediately go silent.
Close render device. Buffers are not silent.
Then I opened capture device with AudioDeviceRole::Communications and capture device works fine all the time.
For Windows 10 capture device works all the time, no matter if you open it with AudioDeviceRole::Communications or not.
I've had the same problem. It seems like you can either use only AudioCategory_Other or create an instance of VoipPhoneCall and use only AudioCategory_Communications.
So the solution in my case was to use AudioCategory_Communications and create an outgoing VoipPhoneCall. You should implement the background agents as in Chatterbox VoIP sample app for the VoipCallCoordinator to work .
I'm developing a networked AIR application in Flash Professional. I need to open two instances of the application and after searching I found that launching the app multiple times just causes an invoke event to be sent to the currently running app.
Up until now I've been using NetConnection & NetGroup (Supported by Flash Player 10.1+), now that I'm using ServerSocket & Socket, it requires the AIR 2+ runtime.
I found a solution to open a window on invoke.
my solution would be to launch a new window on invoke
function openWindow():void
{
newWin = new NativeWindow(init); //Initialize the Native Window
newWin.activate();
newWin.height = 200;
newWin.width = 300;
newWin.title = "My First New Win!";
}
and have it
gotoAndPlay(1, "Scene 1");
Is there a way to execute that on the new window? Or is there a way to open two instances of an AIR app?
Edit
You can open two instances of the same air app by changing it's ID. However, this is a very involved process every time I want to debug!
Turns out AIR on Android doesn't support ServerSockets. This means I must use non-AIR flash methods to achieve communication.
I can then achieve network testing through multiple Flash Player instances.
I don't believe ADL has the ability to run more than instance at a time.
i have a code which saves a display object locally as an image file, but at some point it began throwing error 2174. this code is called either from context-menu click event or keyboard event.
var sourceBmd:BitmapData = new BitmapData(displayObject.width,displayObject.height);
sourceBmd.draw(displayObject,new Matrix(displayObject.width,0,0,displayObject.height));
var jpgEncoder:JPGEncoder = new JPGEncoder(80);
var byteArray:ByteArray = jpgEncoder.encode(sourceBmd);
try
{
filereference.save(byteArray,"posterImage.jpg");
}
catch (e:Error)
{
Debugging.alert("error: ",e.message);
}
as you can see, the filereference has only a single action - so no reason for error 2174 to be thrown.
in case you wonder - i'm publishing for flash player 10.0
UPDATE: i found it it has to do with the flash player version: on 10.3 it works, while on 11.1 if fails.
any ideas?
cheers,
eRez
filereference.save needs to be called from a user action IE: mouse click
If it isn't you will get that error.
Also Publish for version 10 or higher.
Also per the docs.
Note that because of new functionality added to the Flash Player, when publishing to Flash Player 10, you can have only one of the following operations active at one time: FileReference.browse(), FileReference.upload(), FileReference.download(), FileReference.load(), FileReference.save(). Otherwise, Flash Player throws a runtime error (code 2174). Use FileReference.cancel() to stop an operation in progress. This restriction applies only to Flash Player 10. Previous versions of Flash Player are unaffected by this restriction on simultaneous multiple operations.
Does this link solve your problem?
Also, did you try restarting flash IDE after the error occurred?
by reading through the docs, i can assume:
you're running in flash player 10
you don't call filereference.cancel() in cases like when the user clicks "cancel" or "close" on the dialogue box that opens; try it