Android监听拨打电话

第一步获取权限

 Manifest.permission.READ_PHONE_STATE
 Manifest.permission.ANSWER_PHONE_CALLS
 Manifest.permission.READ_CALL_LOG   
 Manifest.permission.READ_CONTACTS

第二步 注册监听

private var telephonyManager: TelephonyManager? = null
    private var mPhoneStateListener: PhoneStateListener? = null
    private fun lisPhone(){
        telephonyManager = getSystemService(Context.TELEPHONY_SERVICE) as TelephonyManager
        mPhoneStateListener =  object :PhoneStateListener() {
            override fun onCallStateChanged(state: Int, phoneNumber: String?) {
                super.onCallStateChanged(state, phoneNumber)
                when (state) {
                    //挂断
                    TelephonyManager.CALL_STATE_IDLE -> {
                        Log.e("电话监听", "onCallStateChanged: 挂断${phoneNumber}")
                    }
                    //接听
                    TelephonyManager.CALL_STATE_OFFHOOK -> {
                        Log.i("电话监听", "onCallStateChanged: 接听${phoneNumber}")
                    }
                    //响铃
                    TelephonyManager.CALL_STATE_RINGING -> {
                        Log.i("电话监听", "onCallStateChanged: 响铃${phoneNumber}")
                    }
                }
            }
        }
        telephonyManager!!.listen(mPhoneStateListener!!,PhoneStateListener.LISTEN_CALL_STATE)

    }

结尾 取消监听

    private fun cancelPhoneStateListener(){
        // 取消来电的电话状态监听服务
        if (telephonyManager != null && telephonyManager != null) {
            telephonyManager!!.listen(mPhoneStateListener, PhoneStateListener.LISTEN_NONE);
        }
    }