Android disturbance in ongoing call - android

I have create the aidl file ITelephony.aidl for ending the call. Now before the call should be ended, I need to generate the voice in ongoing call, so that the listener assumes that there is a problem in next work.
I have tried to solve this by myself in three ways:
Control the audio stream volume
audioManager.setStreamMute(AudioManager.STREAM_VOICE_CALL, isMute);
int index = rand.nextInt(5);
audioManager.setStreamVolume(AudioManager.STREAM_VOICE_CALL,index,0);
Another way is using the setMute in telephonyService
http://androidsourcecode.blogspot.in/2010/10/blocking-incoming-call-android.html
but working in in 2.3
I have also tried to implement using media player for start playing when the call is going on but no luck.
So if there is any other idea then please let me know.

It seems you have the same problem I had a while ago: With Android 2.3 aka Gingerbread it's no longer possible to use the ITelephony interface because the MODIFY_PHONE_STATE permission has been marked system only.
Details may be found here.

Related

DTMF receiving in Android

my main goal is to get DTMF tones in my Android app and perform related actions. I've seen that TelephonyManager can send DTMF but there is no method to receive them. I came across many pages (most of them quite old) which suggest the use of FFT libraries through buffering the VOICE_DOWNLINK audio stream with AudioRecorder (setting proper permissions in the manifest). I tried both with AudioRecorder and MediaRecorder (which is mainly intended for creating file) as well as "Visulizer" class which contains a proper getFft methos out of the box but none of them can access MediaRecorder.AudioSource.VOICE_DOWNLINK & co even if permissions are correctly managed and granted.
uses-permission android:name="android.permission.RECORD_AUDIO"
None of the Visualizer/MediaRecorder/AudioRecorder get initialized and I'm getting frustrated by the fact that I'm chasing after record permissions in order to listen for DTMF tones. Is there any other way I'm not considering?
After many research it appears impossible since
There is no DTMF listen method (Google... why??)
There are limitation accessing other's phone audio to FFT.
Especially related to this last point I've seen that basically all app based on a common used Google/GitHub code (https://github.com/pjasiun/dtmf-decoder) crashes from a certain SDK during calls. They all work fine with phone mic which is useless for phonecalls
Leaving this post for other people. For my purposes I resolved with an Arduino DTMF recognizer.

Android: which api to use to record all incoming and outgoing call (Since in changelogs Android blocked call recording)

Is there is api where i can record all the incoming and outgoing call in android pie version . It seems nearly impossible to record a call. Please suggest what can be done in this scenario
Android disabled the api with their security update policy. Looking at the permissions list the closest you can find is the MANAGE_OWN_CALLS, meaning that the best solution for you is to implement a standalone application for calling where you should be able to interact with microphone directly.

Alternative to READ_PHONE_STATE permission for getting notified of call

I'm currently using the READ_PHONE_STATE permission in Android to pause my media player when there's a call, and to resume playback when the call is over. The permission seems to scare a lot of people, so I was wondering if there was an alternative to catching the starting and stopping of a phone call without it. Any help is appreciated. Thanks!
If you want to adjust your audio output in response to something else wanting to perform audio output (e.g., an incoming phone call), look into Android's audio focus support.
READ_PHONE_STATE, as noted, is a bit of a scary permission. Moreover, it only deals with phone calls, and not other things that might need the same capability (e.g., VOIP calls, as AFAIK those don't tie into READ_PHONE_STATE-enabled stuff).
Unfortunately, audio focus is not a substitute for READ_PHONE_STATE. My app has to use both. The standard phone app on my Galaxy S3 I9300/ Android 4.3 doesn't seem to request the audio focus at all. The TelephonyManager class gives you a way to detect the end of the phone call (by sending the CALL_STATE_IDLE state update). The AudioManager doesn't seem to do anything similar, so even if audio focus could be used, it would not be as useful. And, from what I see in the documentation, there doesn't seem to be a narrower permission than READ_PHONE_STATE that would allow the app to read the phone state but not the call information. If I'm wrong about any of this, please correct me.
Unfortunately, audio focus is not a substitute for READ_PHONE_STATE. My app has to use both. The standard phone app on my Galaxy S3 I9300/ Android 4.3 doesn't seem to request the audio focus at all. The TelephonyManager class gives you a way to detect the end of the phone call (by sending the CALL_STATE_IDLE state update). The AudioManager doesn't seem to do anything similar, so even if audio focus could be used, it would not be as useful. And, from what I see in the documentation, there doesn't seem to be a narrower permission than READ_PHONE_STATE that would allow the app to read the phone state but not the call information. If I'm wrong about any of this, please correct me.

Playing Audio During call so that other person on call can hear it

i am developing one application which
needs to play an audio song to callee when call is lifted by callee,
and automatically call has to be disconnected automatically when audio
song playing completed . i tried to find in android API for any
classes or methods to do this, but failed to find... please help me
how to do this..
your answer could be helpful to me...please do reply
Thank you in advance..
AFAIK, it is not possible to play a sound in the ongoing call and also to automatically dosconnect a call. Telephont API doesnt provide any methods to do any od these. So both od these requirement can't be fullfilled in ANdroid.

How to automatically answer call and play prerecorded sound out to the caller and DTMF on Android

Could it be possible now, which we can develop an Android application having the following requirement for its working steps
Automatic receive the call, then
Play some sound out to the caller, wait for DTMF response, then
Record the caller sound (in the case that they permit, by pressing 1 as DTMF response)
Callee can play back the recoreded sound later.
Thank for all answers in advance .....
Hey I am also making same application...for Automatic receive call you need to change Source Code of android. I have done it successfully with froyo 2.2. There is method answerCall(Phone phone) in PhoneUtils.java file with that you can automatic receive call.
I am also searching for DTMF....but till now i didn't get anything which can be helpful....for DTMF decoding....
the first point seems possible. check the state of call if it is ringing state the program can auto attend it for you..you can find more information in this link.
http://www.devlper.com/2010/08/detecting-incoming-and-outgoing-calls-in-android/
http://prasanta-paul.blogspot.com/2010/09/call-control-in-android.html

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