BackgroundExoAudioService.java 文件源码

private void initPhoneCallListener()
{
    PhoneStateListener phoneStateListener = new PhoneStateListener()
    {
        @Override
        public void onCallStateChanged(int state, String incomingNumber)
        {
            if (state == TelephonyManager.CALL_STATE_RINGING) {
                //Incoming call: Pause music
                mPlaybackManager.handlePauseRequest();
            } else if (state == TelephonyManager.CALL_STATE_IDLE) {
                //Not in call: Play music
                mPlaybackManager.handlePlayRequest();
            } else if (state == TelephonyManager.CALL_STATE_OFFHOOK) {
                //A call is dialing, active or on hold
            }
            super.onCallStateChanged(state, incomingNumber);
        }
    };

    TelephonyManager mgr = (TelephonyManager) getSystemService(TELEPHONY_SERVICE);
    if (mgr != null) {
        mgr.listen(phoneStateListener, PhoneStateListener.LISTEN_CALL_STATE);
    }
}