Android studio 自定义phonestatelistener只调用几次，然后停止

我想检测一个来电，我想知道电话号码。我还想知道电话什么时候结束

我在这里找到了这个代码：

刚开始的时候效果很好，但是打了几次电话之后，我再也没有收到任何同学的回复

有人能帮我吗？提前谢谢

电话侦听器

public class PhoneCallListener extends PhoneStateListener {

    private static final String LOG_TAG = PhoneCallListener.class.getSimpleName();
    private boolean isPhoneCalling = false;
    private Context context;

    PhoneCallListener(Context context) {
        this.context = context;
        Log.d(LOG_TAG, "PhoneCallListener initiated");
    }

    @Override
    public void onCallStateChanged(int state, String incomingNumber) {
        Log.d(LOG_TAG, "onCallStateChange " + state);

        if (TelephonyManager.CALL_STATE_RINGING == state) {
            // phone ringing
            Log.i(LOG_TAG, "RINGING, number: " + incomingNumber);
        }

        if (TelephonyManager.CALL_STATE_OFFHOOK == state) {
            // active
            Log.i(LOG_TAG, "OFFHOOK");

            isPhoneCalling = true;
        }

        if (TelephonyManager.CALL_STATE_IDLE == state) {
            // run when class initial and phone call ended, need detect flag
            // from CALL_STATE_OFFHOOK
            Log.i(LOG_TAG, "IDLE number");

            if (isPhoneCalling) {

                Handler handler = new Handler();

                //Put in delay because call log is not updated immediately when state changed
                // The dialler takes a little bit of time to write to it 500ms seems to be enough
                handler.postDelayed(new Runnable() {

                    @Override
                    public void run() {
                        // get start of cursor
                        Log.i("CallLogDetailsActivity", "Getting Log activity...");
                        String[] projection = new String[]{CallLog.Calls.NUMBER};


                        @SuppressLint("MissingPermission") Cursor cur = context.getContentResolver().query(CallLog.Calls.CONTENT_URI, projection, null, null, CallLog.Calls.DATE + " desc");
                        if (cur != null) {
                            cur.moveToFirst();
                            String lastCallnumber = cur.getString(0);
                            Log.d(LOG_TAG, "Call ended: " + lastCallnumber);
                            cur.close();
                        }
                    }
                }, 500);

                isPhoneCalling = false;
            }

        }
    }
}

主要活动

public class MainActivity extends AppCompatActivity {

    private static final String LOG_TAG = MainActivity.class.getSimpleName();
    private TextView tv;

    private Receiver phoneReceiver, smsReceiver;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tv = findViewById(R.id.tv);

        PhoneCallListener phoneListener = new PhoneCallListener(this);
        TelephonyManager telephonyManager = (TelephonyManager) this.getSystemService(Context.TELEPHONY_SERVICE);
        if (telephonyManager != null) {
            telephonyManager.listen(phoneListener, PhoneStateListener.LISTEN_CALL_STATE);
        }
    }
}

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检查您的设备是否有一些电池节电应用程序或类似的内置功能，这些应用程序/设备功能可能会杀死当前未运行的应用程序，阻止它们收到广播通知，并且suchI正在使用模拟器，因此我不认为这是原因。您是否在某个时候强制关闭了应用程序？在这样做之后，没有一个听众或广播接收器会工作，我想是这样的，因为我再试了一次，一切都很好。谢谢是的，常见的困惑问题，除非你已经对此很感兴趣，并且浪费了几个小时试图找出问题出在哪里