Checking the status of a phone call remotely

Question

I want to check after starting a phone call what the status of the call is via a connected PC, if possible with the ADB. I'm starting a call by entering a phone number with the adb command service call phone 2 s16 "some phone number" and then sending input keyevent 5 to press the call button.

Now I'm struggeling to find a way to determine the status of the call. I need to know if the the number getting called is currently busy, if the call got cancelled or if the call was successfull/that I have an open voice connection to the called number. Is there any way of monitoring that?

The phone model really doesn't matter nor the android service/app I use to call the number nor the android version. The phone will be/is rooted. I will use whatever works.

Answer 1

Run adb logcat|grep -i currentCallState

You will get the logs:

D/PhoneUtils( 1242): setAudioMode() currentCallState : DIALING

D/PhoneUtils( 1242): setAudioMode() currentCallState : DIALING

D/PhoneUtils( 1242): setAudioMode() currentCallState : DIALING

D/PhoneUtils( 1242): setAudioMode() currentCallState : DIALING

D/PhoneUtils( 1242): setAudioMode() currentCallState : ALERTING

D/PhoneUtils( 1242): setAudioMode() currentCallState : ACTIVE

D/PhoneUtils( 1242): setAudioMode() currentCallState : DISCONNECTING

D/PhoneUtils( 1242): setAudioMode() currentCallState : IDLE

DIALING - Still dialing ALERTING - Ringing DISCONNECTING - Clicked Disconnect IDLE - Back to normal state

Answer 2

adb shell dumpsys telephony.registry | grep mCallState, will return:

• 0 indicates idle,
• 1 = ringing and
• 2 = active call

Answer 3

I just found my own answer. Using "dumpsys telephony.registry" gives me every information I need. It contains the variable "mCallState" which is just what I need.

Update: ok not 100% what I need, for some reason the callstate does not change when a connection is established. If someone has more ideas I'd love to know.

Update 2: Apparently this is a security measurement in Android, you can not get the current call status during the call, you only get to know that the user is making one but not if there is already an active connection present or still dialing.

Answer 4

To call TelephonyManager.getCallState() from adb shell use:

adb shell service call phone 30

For proper parsing of the service call command output on the device side and without external dependencies see my answer here

Also read Calling Android services from ADB shell for more details.

Answer 5

The way you find those numbers is by first identifying your AOS version and then go to GrepCode and go to your version. Then follow the links to: /com.android.internal.telephony.ITelephony (*.java) and search the code for CALL_TRANSACTION.

Answer 6

Figuring out if the call is still in progress is pretty straight forward. You can either:

• Monitor the logcat for the phone state
• Write a bit of code to poll http://developer.android.com/reference/android/telephony/TelephonyManager.html#getCallState()
• Write a bit of code to register for phone state http://developer.android.com/reference/android/telephony/PhoneStateListener.html

Figuring out if the number called is currently busy is a totally different scope since you now have to deal with network specific implementation (cdma is wildly different than gsm). On CDMA it is almost impossible to figure it out.