I mean without cordova or other framework. I'm pretty sure i need to write Java code and link it somehow with html5 through the android webview.
If it is possible, can get a little example how to connect to the camera or other sensor.
Some of the sensors have a JavaScript API such as geolocation, orientation (gyroscope) and the battery. To access the camera you could use MediaDevices.getUserMedia, however, this is still in an experimental stage and is not supported by all Android devices. For more information refer to this link.
Look into JavascriptInterface
https://developer.android.com/reference/android/webkit/WebView.html
https://developer.android.com/guide/webapps/webview.html
Specifically, addJavascriptInterface(java.lang.Object, java.lang.String))
#JavascriptInterface
class JsInterface {
public void startCamera() { ... }
}
WebView myWebView = (WebView) findViewById(R.id.webview);
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
webView.addJavascriptInterface(new JsInterface(), "androidInterface");
Basically, add the JavascriptInterface, and enable javascript on the web view. Then in your javascript you can detect if the interface exists like so:
if ("undefined" != typeof androidInterface) {
androidInterface.startCamera();
}
Now in the Java code for startCamera, you can do whatever native stuff you need done.
Related
Is it possible to swap the camera in during a video call on mobile?
I can get the available cameras using MediaStreamTrack.getSources().
But I'm able to swap them mid-call.
Any ideas on how to swap during a video call using html and javascript (I'm developing a hybrid app).
Also: is it possible to make Safari (iOS) compatible for webRTC without any plugin?
Any ideas on how to swap during a video call using html and javascript.
Something like this should work in Chrome*:
function switchCamera() {
// get new stream (different camera)
getUserMedia(constraints, function(newStream){
var oldStream = peerConnection.getLocalStreams()[0];
// toggle streams
peerConnection.removeStream(oldStream);
peerConnection.addStream(newStream);
// re-negotiate
peerConnection.createOffer(function (offer) {
peerConnection.setLocalDescription(offer);
// sendOfferToPeers(offer);
});
}, function(e) {
console.log(e);
})
}
function gotOffer(offer) {
peerConnection.setRemoteDescription(offer);
peerConnection.createAnswer(function(answer) {
peerConnection.setLocalDescription(answer);
// sendAnswerToPeers(answer);
});
}
function gotAnswer(answer) {
peerConnection.setRemoteDescription(answer);
}
*you mentioned something about being on mobile so the way you obtain the stream might be different. Also I didn't test this code and the API looks different, have a look here for the correct function calls createAnswer etc.. But the gist of it should be the same:
Acquire new stream
Update peerConnection
Inform peers (re-negotiate)
Also: is it possible to make Safari (iOS) compatible for webRTC without any plugin?
No. You can have a look here for updates.
Developing tools : Visual Studio 2012, target wp platform : wp8.
I am facing the above problem:
When my application is running on background and i am receiving a notification i vibrate the phone successful and i want to play a specific sound.
What i have tried so far:
Player = new MediaElement();
Player.AutoPlay = true;
Player.Volume = 5;
Player.Source = new Uri("/data/alert.mp3", UriKind.RelativeOrAbsolute);
Player.MediaOpened += (Object s, RoutedEventArgs args) =>
{
Player.Play();
};
I i am not getting any exception but no sound. Neither on foreground nor background .
Am i missing something?
I will appreciate any help.
You can't use the MediaElement API to play notification sounds when the app is in background. In order to launch a notification and play a custom sound, you need to use the ShellToast and use the Sound property via reflection.
Here is how play a custom notification sound from background (MSDN link) Using custom sounds in toasts on Windows Phone 8 Update 3
EDIT: When the app is running in foreground, you can use the same technique (ShellToast with Sound).
Even MediaPlayer class can help you play songs and media in the background when you are showing a toast or a small pop up dialog.
Check here : http://msdn.microsoft.com/en-us/library/microsoft.xna.framework.media.mediaplayer.play.aspx
I am trying to use gaforflash to track usability on a desktop adobe air app. No luck... Is this even possible? I keep finding blogs where they say it is possible and other where they say it's not... In the google analytics for flash site they have the following comment.
Note: Currently, Flash tracking is available for any Flash content embedded in a web page. Tracking of data sent from Adobe Air, Shockwave, or via the Flash IDE (e.g. using Test Movie) is not supported at this time.
A bit lost here. Much appreciated if you could give me some advise.
Thanks.
You can use own events to grab analytics. But it not in automode. You should create many handlers. It looks like:
protected function init()
{
// init tracker
tracker = new GATracker(stage, account, "AS3", false);
//add handlers
videoPlayer.addEventListener(MediaPlayerStateChangeEvent.MEDIA_PLAYER_STATE_CHANGE, onPlayerStateChangeHandler);
}
..
protected function onPlayerStateChangeHandler(event:MediaPlayerStateChangeEvent):void
{
if (event.state == MediaPlayerState.BUFFERING)
{
if (tracker) tracker.trackEvent("Video", "BUFFERING", 'some title');
}
if (event.state == MediaPlayerState.PLAYING)
{
if (tracker) tracker.trackEvent("Video", "PLAYING", 'some title');
}
}
I am writing a new WP8 app using the off-the-shelf LongListSelector that is shipped in the Microsoft.Phone.Controls assembly. Can anyone provide a code example that implements pull-to-refresh, originally made popular by Tweetie for iPhone and now common on iOS and Android? The existing examples use non-standard controls and I'd like to maintain my use of LongListSelector in WP8.
EDIT
I have found a good answer on StackOverflow describing the Twitter sample and how to do this in more detail:
Continuous Pagination with LongListSelector
You do not.
Pull-to-refresh is not a standard Windows Phone interaction, and you therefore should not implement it.
No native/first-party Windows Phone application use this functionality, and almost no third-party application does either. There is a reason for that.
To refresh the content of a page (or in your case, a LongListSelector), you should use a refresh ApplicationBacIconButton, just like in the Mail app. That's the standard and preferred way to manage refreshes.
Windows Phone is not Android, nor is it iOS. Keep that in mind when designing an application for it.
It is not a zoo, there are rules.
Actually, I just discovered a project uploaded to the Windows Phone Dev Center on November 30, 2012 that implements "infinite scrolling" using Twitter Search and Windows Phone 8 LongListSelector.
Download this project at: http://code.msdn.microsoft.com/wpapps/TwitterSearch-Windows-b7fc4e5e
If you really must do this (see answer by Miguel Rochefort) then details can be found at http://blogs.msdn.com/b/jasongin/archive/2011/04/13/pull-down-to-refresh-a-wp7-listbox-or-scrollviewer.aspx
Basically, the ScrollViewer has hidden/undocumented states that allow for detecting "compression" at the top or bottom of the list and you can use this to trigger the loading.
This is not completely trivial, but one way of doing it is to use GestureService
this.gestureListener = GestureService.GetGestureListener(containerPage);
this.gestureListener.DragStarted += gestureListener_DragStarted;
this.gestureListener.DragCompleted += gestureListener_DragCompleted;
this.gestureListener.DragDelta += gestureListener_DragDelta;
However, it has some bugs. For example, DragCompleted is not always raised, so you need to double-check for that using ManipulationCompleted event, which seems to be more reliable.
containerPage.ManipulationStarted += delegate { this.manipulationInProgress = true; };
containerPage.ManipulationCompleted += delegate
{
this.manipulationInProgress = false;
PerformDragComplete();
};
Another issue is that DragDelta occasionally reports bad coordinates. So you would need a fix like this:
Point refPosition = e.GetPosition(null);
if (refPosition.X == 0 && refPosition.Y == 0)
{
Tracer.WriteLine("Skipping buggy event");
return;
}
Finally, you can find if list is all the way at the top:
public double VerticalOffset
{
get
{
ViewportControl viewportControl = this.FindChildByName("ViewportControl") as ViewportControl;
if (viewportControl != null)
{
Tracer.WriteLine("ViewPort.Bounds.Top=" + viewportControl.Bounds.Top + " ViewPort.Top=" + viewportControl.Viewport.Top.ToString() + " State=" + this.ManipulationState);
return viewportControl.Bounds.Top - viewportControl.Viewport.Top;
}
return double.NaN;
}
}
You can check out the samples in
https://github.com/Kinnara/WPToolkit
it has an excellent implementation something called a ListView extension of the longllistselector control, that will really help you out.
and remember with longlistselector always try to load 20 items atleast. =)
As the WP8 LLS doesn't use a scrollviewer, I guess you will have to inspect the UI tree to get a hold on the viewport control and see what you can do with ViewportControl.Viewport property ...
Oh ... the twitter application is now using the pull to refresh interaction. I like the UI guidelines of the WP platform but rules, once mastered, are made to be broken ;)
This post here can give you hints on how to get the viewport control and retreive the scrolling offset. this scrolling offset must be of a particular value when the list is bouncing
I have a flash application running Flash 9 (CS3). Application is able to control the Softkeys when this flash application is loaded in the supported mobile device. But, the application doesn't have control when the same is embedded in HTML page and browsed via supported mobile device. Any ideas how to make this work?
Thanks
Keerthi
There is no special way to receive soft key events when embedded in HTML - if the browser/OS gives the events to Flash, then you can catch them like any other key event:
var myListener = new Object();
myListener.onKeyDown = function() {
var code = Key.getCode();
if (code==ExtendedKey.SOFT1) {
trace("I got a soft key event");
}
}
Key.addListener(myListener);
However, you'll find that most phones/browsers will not give you soft key events when your SWF is embedded in HTML. This isn't part of the Flash Lite spec - strictly speaking I believe they could give you those events if they wanted to, but most phones simply use those keys for browser functions, and consume them before they get to Flash.
Note that you can check at runtime whether or not softkeys are available:
trace(System.capabilities.hasMappableSoftKeys);
trace(System.capabilities.softKeyCount);
If you use a switch statement, you can have more than one keycode associated with an action, you make a desktop version for testing too. I have done it myself.