CODEWITHSUNDEEP
javaandroidvoice-recognition
Sunny
Sunny

Reputation: 14828

Recognize voice when phone is idle screen off?

Can i make a service which recognize voice even when phone is idle or screen off? I mean can phone listen to what the user will say even on idle state.

Upvotes: 3

Views: 1873

Answers (3)

Venryx
Venryx

Reputation: 18059

I've been working at getting a background audio recorder (while screen is off), and these are the options I've found:

  1. A full wakelock lets you keep recording, but keeps the screen on. (not ideal)

  2. A partial wakelock would be good, except it doesn't actually work -- at least on my phone. (the cpu is kept active, but the data from the microphone becomes just 0s after a couple minutes)

  3. Use a foreground service which starts a background thread that records the audio. This is the best since it lets the screen turn off, while still recording indefinitely.

See here for an example: https://stackoverflow.com/a/57260468/2441655

Upvotes: 0

Sebastian Olsson
Sebastian Olsson

Reputation: 836

You will have to aquire a wakelock in a service too keep the phone from sleeping so you can record audio. You can probably stick with a PARTIAL_WAKELOCK since you will not need the screen to be on.

You also need the wakelock permission.

Keeping the device active and processing sound continuously will however not be sensible for any implementation I can think of.

It is a horrible idea for most purposes since it will drain your battery in a matter of hours (tops).

Upvotes: 0

EGHDK
EGHDK

Reputation: 18130

This is the entire program on how to make that happen.

http://developer.android.com/guide/topics/media/audio-capture.html

That shows how to record audio, the same implementation could be used to listen for audio.

Also, DEV GUIDE on what services are.

Right from developer.android.com

A service is a component that runs in the background to perform long-running operations or to perform work for remote processes. A service does not provide a user interface. For example, a service might play music in the background while the user is in a different application, or it might fetch data over the network without blocking user interaction with an activity. Another component, such as an activity, can start the service and let it run or bind to it in order to interact with it. A service is implemented as a subclass of Service and you can learn more about it in the Services developer guide.

This should give you all the information you need: http://developer.android.com/guide/topics/fundamentals/services.html

Upvotes: 1

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