I am working on project where I need to catch the image capture event.
It's for nokia N73 having platform S60 3rd edition.
Is there any possible way using J2ME only (without using symbian).
Description:
J2ME application running in background, on click of capturing image from camera J2ME application initiates and comes in front. Takes the captured image and transfers it to J2ME app and displays on screen.
if not possible using J2ME , Is there any possible way using symbian? can anyone provide tutorial or code snippet?
Thank you.
Regards,
Rajiv
Not possible to access the native camera from J2ME. You'd need to get the user to start your app first, then access the camera from your app (using JSR 135, spec here, introduction and examples here). Then you can use the captured image however you wish.
HTH
The N73 in particular has a fairly large hardware limitation when you want to use the camera.
You need to have the user manually open the camera cover before you can use the camera.
This launches the native camera application included in S60.
The user then needs to close that application.
From that point on, J2ME can use the camera, via the mobile media API defined in JSR-135.
If the user reboots the phone, the camera cover needs to be re-opened before J2ME can use the camera again.
You may have better luck using J2ME and JSR-135 to capture images using the front camera on the N73.
I seriously doubt that J2ME would see the user pressing the camera key in javax.microedition.lcdui.Canvas.keyPressed();
JSR-135 doesn't really provide a system-wide camera capture event for J2ME.
Related
Firstly, what I would like to achieve. I am building media system using Raspberry Pi device. So far there is mopidy service which as far as I know uses libspotify to play music from Spotify. Everything works really well. Except I would like to control my Raspberry Spotify playback from my desktop Spotify client or from my Android phone. Official clients do allow this feature to switch device.
I would like to implement same feature using libspotify.
I'm not even sure if it's possible using public API.
Any ideas how to achieve such thing are welcome.
Libspotify does not expose Spotify connect functionality. It's a limitation of the library and Spotify show no interest in improving it. So, this is not possible.
I am trying to find a clever way to keep a BLE app active in the background on iOS 6, without breaking any of Apple's rules. I plan to use the phone as a peripheral device and another BLE circuit as the central. My app will automatically be opened when a user arrives to a building using geofencing. After that the iPhone will connect to the first BLE central device it sees (the device will be in its white list). The user will then be able to move throughout the building switching to different BLE "nodes".
My question is: What do I need to do in the background when a user is stationary at their desk so that the app does not get suspended due to memory resources?
My idea is based on this solution for a separate problem: There could potentially (not regularly) be 10-50 users in an area with only a few BLE "nodes" and I read at bluetooth.org that I could setup a dynamic connection system, basically rotating connections through all the users.
My idea is to setup a similar dynamic system where the central device (not the iPhone) disconnects the device on regular intervals (30-40 minutes) and then the iPhone will reconnect.
Is this something that some feasible? Is this against the iOS development guidelines? I was unable to find anything explicit about this. I have also asked on the iOS developer forum, but unfortunately it is not as popular as this site.
Thanks in advance!
Xcode -> Project target -> Capabilities -> Enable background mode
Check Uses Bluetooth LE Accessories
Capabilities
Also enable the following key in .plist file
Required background modes
App communicates using CoreBluetooth
Plist
I want to be able to pair Microsoft PixelSense hardware with multiple mobile devices via bluetooth and I want PixelSense to know which device is which. So if I place two phones on a table, PixelSense should be able to label them by device name. My initial thought was to have the phone display an Identity Tag that has encoded its Bluetooth MAC address so that it could associate them but PixelSense sees in infrared and can't read the phone screen so that idea is out. Can anyone think of another way to do this?
Microsoft has demonstrated a way to do this in their Mobile Connect sample application. They've ingeniously used the fact that almost all phones have a camera that faces down when the phone is placed on a flat surface. So they created an app that will read incoming color data from Surface while the phone is sitting on it.
So it goes like this:
The Surface app starts and makes the Surface computer itself visible on bluetooth (although you may have to do this manually in admin mode, can't remember)
you run the mobile app on your phone, click connect, and place it on the Surface at a designated spot
the Surface flashes a serious of colors into the phone's camera
the phone decodes those colors into a pin and scans through all the open bluetooth devices it can see until it finds one that is a desktop running the appropriate service and accepts the decoded pin.
Now the two are connected with no need for manual input and the Surface knows which physical device it's talking to because it knows which pin it displayed to each device.
*Note - They don't actually allow multiple simultaneous connections in this sample app, but I see no reason why it wouldn't work.
One issue with this approach (other than being pretty complicated to code), is the need for the app on the phone. One way to make it easier for people to get the app is to display a Microsoft Tag or qrcode on the Surface for people to scan (they're much more likely to have a scanning app already). I don't think there's any getting around the need to have something installed on the phone if you're using bluetooth anyway.
I have developed a media based application that runs on a device with Win CE. I need to have a mute/unmute button for controlling the application volume. I have developed the app using .Net compact framework.
I've used waveOutSetVolume for mute in WinCE:
http://www.pinvoke.net/default.aspx/coredll/waveOutSetVolume.html
You cannot control the sound volume for certain application. What you could do is define a static Mute boolean. When it's set to true, the sounds are not being played.
OR
You could look for a custom library that allows playing audio files and controlling the volume - anyway, this isnt the case, if you are only interested in mute/unmute.
How can I save data in mobile phone using j2me?
I want code examples which describes how to store data in mobile phones using j2me.
Further how to give access permission to read/write in mobile phones?
I am using netbeans 6.5 and motorola L6 phone.
Can any one tell me a code example giving how to store, give read/write permission?
You can save data in the record management store. There are some limitations though. The biggest one is that only your application will be able to read the data.
An alternative is to use the FileConnection API, which offers access to the device's file system. All modern phones should support it. However, unless the Midlet is signed, the user will be nagged to give permission to access a file.
Use the PDAPDemo example code from the Sun Wireless Toolkit.
Last time I checked it had a few error handling bugs but it is easily modifiable.
It will tell you what parts of the handset file system your application can read from and write to, both on the phone and on any eventual memory card.