telephony.listen , phoneStateListener not working when app is closed

Question

This PhoneStateListener only works if the app is open for API>28(P) but i want the incoming/outgoing phone number even if the app is closed just like it works in API<=28(P). i am getting the phone number if the app is open at the time of call, but otherwise number is coming as blank.

if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.P) {
                phnNbr = intent?.getStringExtra(TelephonyManager.EXTRA_INCOMING_NUMBER).toString()
            } else if (Build.VERSION.SDK_INT > Build.VERSION_CODES.P && Build.VERSION.SDK_INT <= Build.VERSION_CODES.R) {
                val telephony =
                    context.getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
                telephony.listen(object : PhoneStateListener() {
                    override fun onCallStateChanged(state: Int, incomingNumber: String) {
                        super.onCallStateChanged(state, incomingNumber)
                        println("incomingNumber API>28: $incomingNumber")
                        phnNbr = incomingNumber
                    }
                }, PhoneStateListener.LISTEN_CALL_STATE)
            }

score 2 · Accepted Answer · answered Mar 02 '22 at 14:38

2

I was using onCallStateChanged as i learned from the documentation that the getStringExtra(EXTRA_INCOMING_NUMBER) is deprecated in SDK<= Android P. But to my surprise, as I had READ_PHONE_NUMBERS & READ_CALL_LOG permissions, the old way getStringExtra(EXTRA_INCOMING_NUMBER) worked for me and this also solved wrong responses when operating Sim 2. Just be sure to handle multiple calls to fun onReceive of the BroadcastReceiver.

answered Mar 02 '22 at 14:38

Rauson Ali

111
10

For me broadcast receiver is not working if app is idle for long time – Curvegraph Mar 07 '22 at 12:29
How long appoximately? – Rauson Ali Mar 10 '22 at 15:36
In some devices 30 to 50 minutes in some devices after 3 or 4 hours, Now I used foreground service it works as expected – Curvegraph Mar 11 '22 at 12:41

score 1 · Answer 2 · answered Dec 14 '21 at 16:46

1

It is normal behavior for Android OS to protect user privacy against malicious apps from stealing user information. However, You can resolve the problem by using a System Event Broadcast Receiver to be notified of incoming phone calls. Here is a good example to follow. The example is not enough and applicable for current android API levels and you need to have a Foreground Service when a call is received then run the Foreground Service and execute your codes.

answered Dec 14 '21 at 16:46

A Farmanbar

4,381
5
24
42

i have written this code inside `override fun onReceive` in MyCallReceiver class which extends BroadcastReceiver. Should this work? – Rauson Ali Dec 15 '21 at 05:30
@RausonAli you can try it. – A Farmanbar Dec 15 '21 at 11:15
My approach works but when the app is not used for long time them outgoing calls do not give phone nbr first but then it starts in the next call done within a short interval – Rauson Ali Dec 20 '21 at 12:25
@RausonAli am facing same issue that you faced, can you pls share your answer so that it will be helpful for me and everyone – Curvegraph Feb 23 '22 at 18:53
@Curvegraph Hope my answer helps. – Rauson Ali Mar 02 '22 at 14:40
@RausonAli I will try today, thanks for updating the answer – Curvegraph Mar 04 '22 at 11:53

telephony.listen , phoneStateListener not working when app is closed

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