I am writing a android app which is supposed to play back a audio file when a call is in progress coming from a specific number .. I tried many approaches.. but all went in vein
Separate Thread
Listener on Telephone service
starting a service in parallel
can any one please help me how to proceed regarding this ?
Update :
I am able to play a mp3 file on call recieve and i am able to play it load on speaker.. but how ever loud i play the calling party is not able to listen to it.... is there anyway i can push the speaker stream to call stream
From the api doc here
Note: You can play back the audio data only to the standard output
device. Currently, that is the mobile device speaker or a Bluetooth
headset. You cannot play sound files in the conversation audio during
a call.
So from this and lots of other so answers we can conclude that we can not play an audio during a call process.
But a long time ago from a personal experience with a handset I got a result where the audiotrack was playing while there was a call established and both the voices were heard at the same time. So I think this depends on handsets if it allows it then you can play.
You can try another thing experimentally. play the audio using a different route ( speakerphone or bluetooth).
Another option is to build your custom android build
Related
I came across this plugin -- https://pub.dev/packages/sound_stream -- on pub.dev while searching for a solution to listen to microphone from a flutter app (targeted for both android and iOS).
I am able to use this plugin to listen to user utterances from the microphone as well as playback audio when needed in my app. The requirements are as follows:
Listen to user utterances from the microphone,
Convert the audio byte stream received from the microphone into a base64 encoded string,
Send the audio string to a service by calling a REST API (POST),
Optionally, if the service responds back with audio (in form of a base64 encoded string), decode the audio output string, and play back the sound bytes.
All of these steps are working fine -- both on Android and iOS. However, in the MVP, I don't know how to detect a pause in user utterances (in the audio stream received from the microphone) and automatically trigger the REST API call. Currently my app requires the user to toggle the microphone button on and off in order to talk and then send their audio to the service. So, the user currently needs to tap on the microphone button (on my app) to activate the RecorderStream of the sound_stream plugin, speak and tap on the microphone button again to turn off the RecorderStream and at this point my app calls the API. It's like those walkie-talkies of the good old days!
I want to avoid this and seamlessly call the API when I detect a pause in the user speech and send the sound bytes received until then to the service. Any idea on how I might be able to achieve this?
Any tips will be highly appreciated.
I have heard a lot about blocking the call recording in android 9. I want to understand is it possible to get audio stream in a background service. Every time a user make a Call. If anyone can help me here what are approach to achieve this like giving notification/asking permission to user for this or building a system app or a plugin or a service. For me Audio stream are required to convert it into speech to text.
i got reference from android documentation for incallService,building a calling App and implementing real time text. I have no idea how to connect these three together to get Audio Stream in background service
I want to stream an audio from the server to Android App. I found some solutions but my scenario is quite different.
I have an audio file which is uploaded to the server, I want to run that audio on a specific time and must be stop after audio complete.
Now let say a user opens his android app to listen an audio after one minute from the start time of that audio than he must listen audio from after one minute of audio running and could not listen that audio from back and forward.
Please guide me the to do it and which technologies should I use?
Would it be better you use Google Firebase or any Realtime server? or simple hosting will be a nice option ?
Thanks
I wish to make automated calls to a list of numbers to then play a recorded audio message to them. The ones that don't pick up get a call back later.
What's the cheapest and easiest way to develop this using some pre-existing tools? Any directions welcome.
Note: You can play back the audio data only to the standard output
device. Currently, that is the mobile device speaker or a Bluetooth
headset. You cannot play sound files in the conversation audio during
a call.
from the official docs
I ended up using automated flow apps (Automate [link below] is one such app that I used. Disclaimer: I've no affiliation with app) to trigger automated calls. The flow was initiate on a GCM notification to the phone, which provided the number for call. With all permissions granted and conditions fulfilling (network, sim, call credits, etc.), app should be able to make call to the number.
Now, I'm trying to figure out how to play an audio message for the receiver.
So, if you were looking for 'how' part, here's the how part. If you know the next steps, enlighten me!
https://play.google.com/store/apps/details?id=com.llamalab.automate&hl=en&gl=US
I basically have an audio application that will be playing some music. I want to be able to pause/stop/mute the music when there is an interrupt.
These interrupts include: GPS directions, Phone Call, GPS, etc. (if there are more audio interupts, please let me know)
I already implemented the phone call interrupt, stops the music when phone call received and plays after phone call ends.
How would I do the other interrupts?
EDIT:
I noticed that Android's Play Music application does this. But I am unable to find the source code of that, not sure if that would be helpful.
Make sure you correctly ask for and release Audio Focus as described here:
http://developer.android.com/training/managing-audio/audio-focus.html
With multiple apps potentially playing audio it's important to think about how they should interact. To avoid every music app playing at the same time, Android uses audio focus to moderate audio playback—only apps that hold the audio focus should play audio.
Basically this allows the framework to handle interrupts properly as you cannot specifically code for every situation.