AudioManager.java 文件源码

/**
 * Listener to check incoming call
 */
private void initPhoneListener() {

    final PhoneStateListener phoneStateListener = new PhoneStateListener() {
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            if (state == TelephonyManager.CALL_STATE_RINGING) {
                pauseMedia();
            } else if (state == TelephonyManager.CALL_STATE_IDLE) {

                isInCall = false;

                if (isFirstStart == false) {
                    if (Build.VERSION.SDK_INT >= 17.0) {
                        bigNotification = true;
                        largeMediaPlayer = LargeMediaPlayer.getInstance(context);
                    } else {
                        bigNotification = false;
                        smallMediaPlayer = SmallMediaPlayer.getInstance(context);
                    }
                    resumeMedia();
                }

                isFirstStart = false;
            }
            super.onCallStateChanged(state, incomingNumber);
        }

    };

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