Android :: How To Prevent Android Bluetooth RFCOMM Connection From Dying
Apr 18, 2010
This problem has been solved! Thanks a lot to Brad, Denis and junkie! You're the heroes! This is the working code. It connects to Zeemote and reads data from it.I'm trying to connect to a Zeemote (http://zeemote.com/) gaming controller from Moto Droid running 2.0.1 firmware. The test application below does connect to the device (LED flashes) but connection is dropped immediately after that. I'm pasting two test apps below: one that actually tries to read from input stream and second one that just sits there, waiting for the device to disconnect after 5 seconds. And yes, I do have third version :) which first waits for ACL_CONNECTED and then opens socket but there's nothing new in its behavior.Some background info:I can connect to the Zeemote from my laptop perfectly fine using bluez tools (log attached as well). I know for sure that Droid is able to talk to Zeemote as well because 'Game Pro' from the Market works fine with it (but then it's a driver/service so maybe it uses lower-level API?).I noticed that 'adb bugreport' reports neither UUID nor RFCOMM channel for Zeemote while it does so for all other devices (including Moto HS815 headset, another dumb device for which 'sdp browse' reports nothing). Also, when the device boots, Zeemote's priority is 0 (others have priority 100+).I'm quite at a loss here, I worked on it for so long that I ran out of ideas so any help would be very much appreciated (even if you don't know the answer
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Dec 28, 2009
I'm developing an application that interfaces with an RFCOMM endpoint.Through bluetooth, my Droid phone connects to this device, initializes it, and happily sends and receives data.A problem I have encountered however is when I walk away from the device (while it's sending/receiving) and the bluetooth connection goes stale. I easily detect this in my code by various exceptions thrown by the inputstream/outputstream/socket.
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Sep 27, 2012
Is there an app or a script I could run to tell my phone not to connect to wifi when 4G is available..? I run with wifi on all the time and have a handful of networks I connect to but would like the phone to automatically disconnect from wifi when 4G is available then reconnect if it is lost. This is useful for me at work because depending on where I am in the building I may have 4G/3G/no data but the wifi is everywhere but it is unsecured so I'd rather not use it if I don't have to.
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Nov 2, 2009
Is there any way to comunicate an android phone with a computer trough bluetooth? Ive made a server/client applicattion in Java using bluetooth, but i need to do the client in Android and i dont know how to start, I dont know even if is possible. I only need to send a text message.
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Nov 11, 2010
I'm creating an application that uses an android to send and receive data via bluetooth. but I'm having problems when creating the socket. He gets caught in that line mmSocket btserver.accept = (); And I can not pair with any device.I have another doubt, I can make that communication with an android and a symbian?
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Oct 26, 2010
I have program that runs a bluetooth connection. The socket connects fine. We then read/write from the related streams. This works fine for about a minute, then we start to get IOExceptions from the InputStream.available() and OutputStream.write() functions. The IOException indicates that the socket has been closed. Could anybody take a stab at what might be going on here?
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Mar 3, 2010
I'm having an issue here while trying to connect to an RS232 device with the BluetoothChat sample program.
1- If I first pair my phone with the device through Bluetooth Settings, no problem. The connection is made perfectly and the program works.
2- If not bonded beforehand, I get two errors in a row when I click on my device :
CODE:.................
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Jul 1, 2010
I thought it would be quite easy to develop a bluetooth application on Android, but it looks like the support is very bad. While pairing works, my Nexus One with Android 2.1 can't connect to the PC. It's the same in Windows and Ubuntu. I used on my Desktop computer, in Windows, Hyperterminal and waited on an incoming bluetooth com-port. I searched already a bit, Maybe this:
http://code.google.com/p/backport-android-bluetooth/
or this library:
http://code.google.com/p/bluecove/
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Apr 21, 2010
I'm able to discover devices which r bluetooth ON from my application. But when i try to connect using the Bluetoothsocket's connect() method, I'm getting an IOException: Connection refused.
I'm using the following UUID private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB");
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Aug 13, 2010
I am using Bluetooth APIs to establish the connection. I using the Bluetooth chat application as a reference to communicate with the Bluetooth headset.
When I try to connect with Bluetooth headset I am getting IOException with the reason Connection refused.
Can any one tell me the reason for this exception if possible give me the solution if you already resolved the same.
Here is the code which i am using to establish the communication with the Bluetooth. And i also added the Bluetooth and Blutooth_Admin permissions to my manifest file. Code...
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Aug 13, 2010
In my understand, Anroid app supports only SPP connection not HFP and A2DP. However, I want to initiate HFP and A2DP connection in Android app just like selecting Bluetooth device in Bluetooth Settings menu. I'm not sure it is possible to use a intent including BluetothDevice object, so the intent receiver can initiate HFP and A2DP connection. If you have a idea, could you let me know that?
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Dec 30, 2009
I want to implement an application which can successfully transfer a file from my android eclair device to any other bluetooth device.Please if anybody know the solutions, kindly help me out, mail me at narendraprabh...@gmail.com or post back here please...
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Jan 27, 2010
I need to know the signal strength of a Bluetooth connection to a remote device that I make with my Android 2.1 phone. From the SDK, I can see that I can determine the RSSI at the time I discover the remote device. But I can't see how to update that RSSI value over time.
Can someone give me a hand?
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Aug 4, 2010
I want to write a separate Thread within my application (to do Bluetooth connection). Any idea where I can find any reference for help to write Threads in Android? I searched online but could not find any proper reference.
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Jun 25, 2012
I am working on an application to connect to an ELM327 OBDII bluetooth dongle. My main problem is that I am trying to use the BluetoothChat example from the developers website, and I cannot get the device to connect. I have gotten it to connect with other applications, ELM327 Terminal, and torque, but cannot get my own to connect?
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Aug 6, 2010
I want to connect my Droid to OBDKey I use BluetoothChat as example to connect via bluetooth I connect to OBDKey succesfully but after send message to OBDKey connection lost How can I prevent this?
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Mar 30, 2010
When my Bluetooth application is about to create SPP connection to the unpaired remote device, pairing notification is displayed. From the documentation I can see that pairing request can display a dialog or sent notification. I'd like to know what logic causes my app to sent notification than display a regular pairing dialog. Maybe I'm blind but the problem is I were not aware of that notification and was fighting with pairing problem for few hours :) And I'd really would prefer my app to trigger dialog display.
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May 23, 2010
Is there a way to observe a bluetooth pairing and then be aware of when the connection no longer exists? Basically I want to observe when my phone connects to another device and what that connection is dropped to that I may execute an action based on that connection.
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Nov 3, 2010
I have a sprint anycom bluetooth reciever connected to my car stereo. I think it only supports the A2DP bluetooth profile (no hfp).Right now the music plays through the car stereo just fine but when I get a phone call it does not. Ideally I would like to have the phone call audio go through the stero and use the phone's microphone as if it were on speakerphone. Is this possible?My phone is a g1 running the latest experimental release of cyanogenmod rom.I would love a built in solution but I think the ability to do that is so non standard it wouldn't exist. An existing marketplace app with the ability would be great, too. I have not done any android development but I am a java developer, so a pointer on how to do it programmatically (or that it is not possible) would be great, too.
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Apr 9, 2009
After long running the Media|Player (audio mode) the app I'm developing often crashes w/ the following error: > Process android.process.media (pid 14795) has died. > Killing <my app> because provider com.android.providers.media.MediaProvider is in dying process android.process.media
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Nov 15, 2010
I honestly could not think of a good title. Sorry. Anyway, so I have an app that I am making where I pull information from my custom web api. I pull data from the api and fill in the layout with this information. Problem is it takes a while so the app stalls for a few seconds before the information is pulled since it is in the onCreate method of the activity. To resolve this I implemented a loading dialog. This is where the problems began. I put the http requests into a seperate thread and it downloads fine. No problem. However it keeps force closing every time I try to modify the layout afterward. So basically my question is how do I modify the layout after the background thread is finished? Everything I try keeps force closing the app.
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Mar 5, 2012
"Android OS" is using my battery way too fast at 33%.
I'm wondering what is is exactly and tips on saving battery life.
DROID RAZR
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Oct 5, 2011
I have: A class called BT_Comm BT_Comm creates a bluetooth connection and allows me to send data with it via a method called sendData(int xxx, int yyy).Now, I use this BT_Comm in my main activity -the first one. Say I have 10 Activities, how could I access that same BT_Comm in other Activities?
Eg:
Activity 1 (main)
Code:
BT_Comm bt = new BT_Comm();
pubic void someMethod()
{
bt.sendData(xxx, yyy);
[code]...
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Aug 1, 2010
I have had my Incredible for one week. Paired it with my car with no problems. Today it started losing the bluetooth connection. I turn it on and with 15 seconds, it turns off. It will pair with my car but than disconnects when the bluetooth turns off. Took out the battery and that did not work. Anyone know what could be the problem?
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Jun 12, 2010
With my Instinct, I could browse the pics etc on the phone from my Macbook Pro via Bluetooth. When I try to browse the EVO over bluetooth, I just get connection errors. Is this possible to do?
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Oct 4, 2013
I just spent the day looking for what the limits are for Android v4.3 limit on the BLE connection parameters.
Such as:
-Interval Min
-Interval Max
-Slave Latency
-Supervision Timeout
No luck, Apple is nice enough to document all of these in their Bluetooth Design Guidelines, but Google hasn't been so nice.
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Apr 4, 2010
I am having issues connecting my Sprint HTC Hero to my wife's BB 8350. I've paired and made both devices discoverable but they still won't connect. Can these devices connect to other phones or are they limited to headsets and PC's?
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Dec 17, 2013
Bluetooth constantly dropping my connection when streaming music or listening to calls.URL....
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Apr 21, 2010
I've uncovered what could be a serious problem with the Desire. It's only affected me in one way so far, but who knows what other problems there are that I haven't found. I've noticed on several occasions that when listening to music via Bluetooth, my headphones disconnect for no apparent reason. However I've found a pattern now: if WiFi is turned on and I come within range of a /remembered/ hotspot, the WiFi connects and BOOM, disconnected from audio. I can reconnect straight away. There is another poster here (sorry, can't remember your name or the thread you posted in) describing another problem with WiFi and Bluetooth working - or conflicting! - together so I don't think I'm the only person suffering. Who else can reproduce it and how could I submit a bug report to HTC?
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Jul 21, 2010
I'm not sure if this started after the update, but every time I use WIFI and Bluetooth, my WIFI connection dies less than a minute after using it. For example, I'll connect my Bluetooth headphones and then start up a streaming music service. In less than a minute, the music stops and my wifi connection is dead (even though it says it is still connected). Can't browse the web, do speed test, etc. Have to disconnect WIFI and reconnect. But it will do it again as soon as I start using the connection.If I turn off Bluetooth, my WIFI works just fine. If I use Bluetooth over 3G, it works fine. It's only when I use both WIFI and Bluetooth and when I start using the Internet.I'm thinking it's either a bug or an interference issue between the WIFI and Bluetooth radios? Sometimes the music will cut out a bit before the WIFI connection totally dies. But if I switch over to 3G, it works fine. I tried several apps too, not just the same music streaming service, so I know it's not the app. Here's the weird part: if I use my Bluetooth headphones while connected to WIFI, but only listen to music that's on my device, it doesn't do it. It's only when I start using the WIFI heavily that it does it.Anyone else experience this? As it stands, I cannot use WIFI and Bluetooth at the same time.
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