I'd like to tracking Lte signal strength, so I've been using below method.
PhoneStateListener.onSignalStrengthsChanged(singnalStrength: SignalStrength)
telephonyManager.listen(mListener, PhoneStateListener.LISTEN_SIGNAL_STRENGTHS)
and I've been checking the cell infos by polling telephonyManager.allCellInfo every second.
the problem is onSignalStrengthsChanged() isn't called although the values from telephonyManager.allCellInfo was changed.
onSignalStrengthsChanged() is called only sometimes.
when would be onSignalStrengthsChanged() called?