Android：为什么PhoneCallListener在活动结束后还活着？

我在我的活动中使用了一个电话听众,但在完成我的活动后,用户拨打电话,我的电话听众没有死,再次开始活动！请帮我.

phoneListener = new PhoneCallListener();
telephonyManager = (TelephonyManager) 
            TransferActivity.this.getSystemService(Context.TELEPHONY_SERVICE);
telephonyManager.listen(phoneListener,  PhoneStateListener.LISTEN_CALL_STATE);

PhoneCallListener类：

private class PhoneCallListener extends PhoneStateListener {
    boolean isPhoneCalling = false;
    @Override
    public void onCallStateChanged(int state, String incomingNumber) {

        if (TelephonyManager.CALL_STATE_RINGING == state) {
        }
        if (TelephonyManager.CALL_STATE_OFFHOOK == state) {
            isPhoneCalling = true;
        }
        if (TelephonyManager.CALL_STATE_IDLE == state) {
            if (isPhoneCalling) {
                isPhoneCalling = false;
                    Intent intent = getIntent();
                    startActivity(intent);
                }
            }
        }
    }
}

解决方法:

文件说：

To un-register a listener, pass the listener object and set the events
argument to PhoneStateListener#LISTEN_NONE (0)

这是docs的链接.

标签：telephonymanager,android,phone-call,phone-state-listener
来源： https://codeday.me/bug/20191002/1843586.html