Android :: How Android Handles PCM Data From Voice Call?
Oct 14, 2010
I am trying to understand whether or not Android handles the phone conversation's audio stream or it is done outside Android's framework. Specifically, if, for example, Android controls a cellular processor that provides PCM interface for voice conversation and there is a need to send audio over Bluetooth instead of using mic/speakers, how this is handled? There are two ways here to the best of my understanding:
1. Route PCM from cellular to audio port on Android CPU, then let Android receive the stream and send it to BT stack for processing and eventually pushing to BT hardware over HCI 2. Have Android control a HW switch that will route PCM directly to BT HW using direct PCM interface Which one applies? Is there a preferable way (best usage of resources provided by Android)?
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Nov 15, 2010
I plan to develop Android application which will encrypt/decrypt voice data such that parties can communicate using secure channel. So the question is: how to intercept voice/audio data during GSM call? Is it possible or not? Should I use Android NDK or something else?
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Feb 11, 2010
I use Google Voice (love it) primarily because of it's visual voicemail on my Droid. I do have a Google Voice number, and I'm trying to decide whether to set the Droid app to "make calls using Google Voice" or not.
I have no problem with giving out a different number, and my placed calls seeing the GV number in caller ID.
My question is, does this affect how the call is actually connected, from a quality standpoint? I tired a call both ways, and the sound quality seemed a little bit different. But then, I am an obsessive compulsive weirdo.
Is there any difference in call quality or routing between making a native Verizon call and a Google Voice call on Droid? (Like, does Google voice actual use 3G to connect to Google server over the internetz, then place the phone call?)
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May 27, 2010
Compared to say Verizon's voice mail is there any lag between the call and voice mail notification when using Google Voice?
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Jul 8, 2010
I'm looking for an app. that will allow me to record calls(my voice only) or take voice notes during a call. I've tried a few but it seems neither of them works on android 2.2.
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Jul 28, 2010
I've been using Nimbuzz and fring to make a voice call but fring does not support skype anymore and Nimbuzz somehow mutes itself. I wonder what other BH2 users use to make a voice or video call. If would be really helpful if someone can let me know. I'm in a long-distance(9000km) relationship.
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Sep 24, 2010
I am just wondering about how android handles sms when it receives them. More precisely my question is when the android phone receives a sms message, which application saves the message to the mmssms database? Is this done by the OS or by the native sms application?
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Jan 26, 2010
I have an issue with an application I'm writing for Android. Here's the problem: I need to create several EditText fields on the fly, while still maintaining some sort of handle to each individual one. For example: I create four EditText's, and I wish to submit the information from them to a server via an HTTP connection. How do I get the user-inputted data out of these EditText's after they have been created? (I guess what I'm asking is how exactly do I use the setId() method, because it doesn't seem to be working for me).
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Apr 13, 2010
How an android application handles updates ? What kind of information does the application usually needs to send to request an update, and what does it receives back ?
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Oct 3, 2009
I am looking for an application that handles power management. I downloaded the Power Management app, but the free app has limited features. I am looking for a free app.
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Jul 6, 2009
I have the following exception that occurs I don't really know in which circumstances.
I'm just trying to add an overlay to may viewMap, and I don't have anything special in my classes. The most strange thing is that it worked for a while, then it broken again when I changed my image!
CODE:............................
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Mar 29, 2013
I have a HTC EVO 3D for months now and I've never experienced issues with it, but I aways have plenty of storage left and have done a system reset once so I don't know how it behaves. I'm very curious about this because I've explored some apps cache sizes and for example Facebook was about 50 MB. Is there a limit?
I'd like to know what happens when the internal storage runs out of space. Does Android (regardless of device / custom manufacturers "skins") automatically take care of deleting old cache files from apps?
I mean, if you run out of internal storage in a Nexus device, what happens?
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Dec 7, 2009
Am trying to recognize the voice when am in a call by running the service in background. Is it possible to achieve ? If you have any idea on this please provide me ASAP.
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Jun 19, 2010
Does anyone know of a Yahoo IM client that handles linked (AKA Aliases) accounts? I have tried the following clients:
- Meebo
- Palringo
- IM +
- eBuddy
- Nimbuzz
- Hi Yahoo
- Yahoo Droid
They all have the same issue which is: I have linked yahoo accounts (a primary with other accounts linked). When I log into a yahoo account with the above clients and I receive an IM to a linked account, I receive the IM just fine, but when I respond to the IM, it will send from the primary (or logged in) account and NOT the account that IM was sent too. What SHOULD happen is the IM should be sent from the account that the IM was sent too just like the desktop app works.
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May 17, 2010
I use google voice to send all my calls on my cliq xt but I was wondering if there is a way to have people call my google voice number and not have it count towards my minutes. Also is there a way to have the sms be integrated with the built in android sms app or have the voice app constantly be open?
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Jul 2, 2009
Are there APIs for grabbing the voice (in both directions) during a call? I'm interested in whether it can be intercepted before it's sent out (outgoing) and before it's played by the speaker (incoming).
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Aug 19, 2009
I would like to automatically redirect some incoming call to voice mail. i use a "Broadcast Receiver" to cach call, it works nicely , but how to redirect to voice mail ? is it possible.
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Nov 8, 2010
I am looking for a app for my Samsung Galaxy 5 , which i bought in india two days ago. When given voice instructions,it should place a call, compose an sms , etc. I downloaded an app Vling from market, but it works only when connected to internet. Please suggest me any free app available for this purpose Or , is this feature already available in the phone, please guide me.
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Nov 17, 2010
it possible to use the text-to-speech engine to send a message through a voice call? Like an answering machine. It's also possible to monitor an outgoing voice call to read out loud a text when the other point answers the phone?
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Mar 30, 2009
Does G1 can support the following feature: When in "In Call" state, user can play a mp3 file instead of the voice from microphone, and the one in the other side can hear the mp3. Can I modify the kernel part or framework part to support that with G1?
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Aug 26, 2009
I am looking at a usecase related to sharing of a phone number of a contact during a call. What I expect to happen is that the phone number is converted to synthesized voice and is spoken into the ongoing call. Is it possible to patch the synthesized voice in an ongoing call?
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Jan 21, 2010
I've been searching around the net and browsingthe APIs to find a way to forward an incoming phone call to voice mail, but with no success so far.I know it can be done since some apps do it already. I also know that blocking an incoming phone call is not possible yet and is an issue Google devs are working on.In the app i'm coding, I easily manage to detect an incoming phone call by listening to the phone state. But I cant make the phone NOT ring and NOT show the incoming phone call screen.I' ve tried to cut off the network via a ServiceState object, but that doesn't seem to work.
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Apr 20, 2010
I want to play an audio file on a voice call as following:
The application initiates a call from device X to device Y
When Y replies application on device X should inject an audio file in the stream of the call so device Y hears this audio file.
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Dec 3, 2009
Is it possible to modify the voice data before it's sent to the radio?
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Jul 20, 2010
I need to encrypt the outgoing voice stream and decrypt the incoming phone voice stream in real time. Please guide me if this project is possible with the android sdk
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Jun 3, 2010
I've been trying to wrap my head around this and it's probably an obvious answer but why can't I dial out using my GV number unless I have a data connection active? Per Google and from what I can see, no VoIP is being used and it seems to me when I have a data connection and use GV to dial out it just dials a Google number first. I'd think the call would be made to GV, GV would patch the call through to the person being called and pass on the GV caller ID number. So why does the app need to have a data connection to work?
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Dec 1, 2009
Is it possible in android framework to encrypt/decrypt voice data? What I am thinking is when a call comes in, and before user picks it up another local application is activated, it then encrypts and decrypts outgoing/incoming voice data?
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Sep 28, 2010
I haven't done any work with the Android or iOS platforms, but I have recently been pitched a project and I'm trying to see if it is even feasible.
Is there currently API hooks in the iOS and Android platforms for accessing / manipulating the voice / data streams? What I would like to do is encrypt all outgoing steams and decrypt all incoming streams before they reach and other processes that need that data.
I would assume that because the Android platform is open source one should be able to do this, it just may have to be hacked together. I'm more worried about iOS.
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Sep 8, 2009
With all this talk about people buying the i7500 from Germany; I was wondering if T-mobile has any rules/detection against us using an android phone bought from outside, on the network using a normal voice+data plan like the $30+$10 plan. Because given the price difference of a 2 yr contract a new phone would in theory need to be over $560 before it is no longer worth buying outside. So what is the incentive of getting a simlocked phone, that costs more, and be locked into a 2 yr contract? I guess this applies to some of the other smartphones as well.
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Jun 19, 2010
I've got the htc legend and its an awesome phone. I just wanted to ask to get an idea of how android works on relation to how it handles apps/processes etc. Using a task manager I see that tonnes of apps start when the phone boots. I see apps like app brain, msn talk,.radio, twitter app, stocks, footprints, maps and a whole plethora of others. What makes them start like this? What's the purpose? Do they have a negative impact on performance? It seems like all the apps listed see ones which have shortcuts on the home screen or related widgets. Is this how it works? Although they are listed date saree are they actually taking up system resources? And then there's ones like radio and stocks which I never use and don't have home screen shortcuts for, but they still start. Sometimes when mass kill apps (not processes) it sorta freezes for a while then has to reload the home screen. None of the apps I killed were essential ones, happens sometimes when I kill a bunch of third party apps. Would it be beneficial to kill most of the listed apps which apart on startup that I never use? I try to refrain from using the task manager but Coming from windows I'm just used to massacring all unnecessary processes and programs to keep everything clean.
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