标记上存在语法错误，预期为 ConstructorHeaderName 且标记“(”上存在语法错误，< 预期

Question

我收到两个错误，指出令牌上的语法错误，ConstructorHeaderName 预期相反 & 令牌“(”上的语法错误，<预期

在线上：

mTM.listen(callListener, PhoneStateListener.LISTEN_CALL_STATE);

...有什么建议么？

public class DataCountService extends Service {
    String text = "USR;1";
    String ERROR = Constants.PREFS_NAME;
    private Timer timer = new Timer();
    private long period;
    private long delay_interval;




    EndCallListener callListener = new EndCallListener();
    TelephonyManager mTM = (TelephonyManager)this.getSystemService(Context.TELEPHONY_SERVICE);
    mTM.listen(callListener, PhoneStateListener.LISTEN_CALL_STATE);

    private class EndCallListener extends PhoneStateListener {
        @Override
        public void onCallStateChanged(int state, String incomingNumber) {
            if(TelephonyManager.CALL_STATE_RINGING == state) {
              //  Log.i(LOG_TAG, "RINGING, number: " + incomingNumber);
            }
            if(TelephonyManager.CALL_STATE_OFFHOOK == state) {
                //wait for phone to go offhook (probably set a boolean flag) so you know your app initiated the call.
              //  Log.i(LOG_TAG, "OFFHOOK");
            }
            if(TelephonyManager.CALL_STATE_IDLE == state) {
                //when this state occurs, and your flag is set, restart your app
              //  Log.i(LOG_TAG, "IDLE");
            }
        }
    }

Answer 1

线路

mTM.listen(callListener, PhoneStateListener.LISTEN_CALL_STATE);

不包含在任何方法中。您应该将其放入构造函数（这看起来像您想要的）或常规方法中。