Do you think it is possible to play a movie or something on the computer and hear the voice of the video instantly and remotely on a java based mobile phone via a bluetooth connection?
The speed of a bluetooth connection between the phone and the computer is like 40 KB/s and that looks enough for a voice transmission. But i couldn't find any software that can do this. Please someone give me info about the the possibility of my wish.
You can do it if the Bluetooth device supports Handsfree profile or A2DP sink profile
typically a mobile phone would not support these profile roles (they would support the opposite role Audio Gateway / A2DP source) So you will not be able to route the voice to the mobile phone.
But a Bluetooth headset that support these roles (most do) will be able to get the audio routed to it.
Does it help ?
Related
I'm working with a low energy device that can be very finicky with certain android phones and when it doesn't connect after a phone restart I want to either reset the android Bluetooth service(clear it's storage) or ask the user to do so.
Is there any way I can do this?
I am developing an app in which I need to scans WiFi network and display the list of all connected devices.
Allow a use to tap on a device and the app should show all the hardware info of that particular device. Here by hardware I mean - RAM, Storage Media, Storage Capacity, Device Name, Device IP address, etc.
Now this device can be anything like xbox, a laptop with Linux/Windows, mobile phone like iPhone or any Andorid based smart phone or even a printer.
How can I scans WiFi network and query/detect all the devices attached to it?
What are the protocols that I need to use to get list of hardware in a particular device irrespective of the OS running on it?
Check requestPeers of
WifiP2pManager
As per documents it seeks
PeerListListener which returns WifiP2pDeviceList carrying list of WifiP2pDevice which carries deviceAddress, deviceName, primaryDeviceType, secondaryDeviceType, status and other attributes.
Maybe the Network Discovery github project could help you. It lists all users connected to WiFi with IP and MAC addresses and gathers even some information like open ports, device name, ping, etc.
Hope it helps
In my opinion, you can use Wi-Fi Peer-to-Peer
https://developer.android.com/guide/topics/connectivity/wifip2p.html
"Wi-Fi peer-to-peer (P2P) allows Android 4.0 (API level 14) or later devices with the appropriate hardware to connect directly to each other via Wi-Fi without an intermediate access point (Android's Wi-Fi P2P framework complies with the Wi-Fi Alliance's Wi-Fi Direct™ certification program). Using these APIs, you can discover and connect to other devices when each device supports Wi-Fi P2P, then communicate over a speedy connection across distances much longer than a Bluetooth connection. This is useful for applications that share data among users, such as a multiplayer game or a photo sharing application."
Blockquote
I am working on a project where I have to connect my android device (LG G3) to a GPS with usb. I can't figure out how I can get the data out of my GPS and I do not want to use the device it's internall GPS because I need to be pretty accurate.
If you want to program your own USB GPS to Android, you can take a look at USB Host
According to USB Host documentation:
When your Android-powered device is in USB host mode, it acts as the
USB host, powers the bus, and enumerates connected USB devices. USB
host mode is supported in Android 3.1 and higher.
To use an USB external GPS you have to enable Android developer Options on your phone and enable using mock locations so the service (your one or a third party one) can send locations to the system "bypassing" the internal location system.
There are several apps that can transfer GPS data to your application (take a look at Your are here GPS for example. This app also lets you wath NMEA data).
I am developing an Messaging application using J2ME for which i need to access the mobile number of a device on which application is running.
I tried to find out the api's related to it but was unable to find it.
So Plz can any one tell me is there any other method to find the mobile number in J2ME?
From what I know, that's impossible, not all J2ME devices are mobile phones and even if the device running J2ME is a mobile phone its not always aware of its phone number. There are some tips and tricks to accomplish this task eg. from a way for some Nokia devices (look here) by reading some system properties ('com.nokia.mid.msisdn') to some 'silly' ways of sending an sms to a specially prepared sms receiver/sender who just replies another sms, then your application can listen to incoming sms with a specific data and read its mobile number.
Well, I think it is possible--create a SIM applet that will extract the MSISDN from one of the Elementary Files (EF) of the SIM (I am not sure which one). Then, with SATSA, make the JME application communicate with the SIM applet.
I have an android devic, i wish to know when it is connected to the pc via java/.net
i know its possible - the Samsung New PC Studio is doing it, when ever i connect an android device it lets me know. how can i achieve the same?
You have to listen for one of this notifications
http://developer.android.com/reference/android/content/Intent.html
If you're using it as a mass storage device then use this
http://developer.android.com/reference/android/content/Intent.html#ACTION_UMS_CONNECTED
Other USB events aren't clearly described in the documentation
EDIT:
If you want to read on the computer side I would read this article
http://today.java.net/article/2006/07/05/java-and-usb
and then check which kind of devices are connected to the usb port. if it is a mobile phone, then you can try to send a short message to it. on your phone you make a small piece of code which returns an appropriate answer so you can detect thats its really android/your phone/this phones you want to identify
java device detection
This site have a guide on how to detect device with java web and java core
http://51degrees.com/Support/Documentation/Java/GettingStarted.aspx