从主活动访问NotificationListenerService类，反之亦然

<uses-permission android:name="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE" />
<application>
    ...
    <service
        android:name="com.example.MyNotificationListenerService"
        android:label="Notification Listener"
        android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
        <intent-filter>
            <action android:name="android.service.notification.NotificationListenerService" />
        </intent-filter>
    </service>
    ...
</application>

public class MyNotificationListenerService extends NotificationListenerService {
    @Override
    public void onNotificationPosted(StatusBarNotification sbn) {
        // 处理通知添加事件
    }

    @Override
    public void onNotificationRemoved(StatusBarNotification sbn) {
        // 处理通知移除事件
    }
}

public class MainActivity extends AppCompatActivity {
    private static final int REQUEST_CODE_ENABLE_NOTIFICATION_ACCESS = 1;

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

        // 检查通知访问权限是否已授予
        if (!isNotificationAccessEnabled()) {
            // 请求用户授予通知访问权限
            Intent intent = new Intent(Settings.ACTION_NOTIFICATION_LISTENER_SETTINGS);
            startActivityForResult(intent, REQUEST_CODE_ENABLE_NOTIFICATION_ACCESS);
        }
    }

    private boolean isNotificationAccessEnabled() {
        Set<String> enabledPackages = NotificationManagerCompat.getEnabledListenerPackages(this);
        return enabledPackages.contains(getPackageName());
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_CODE_ENABLE_NOTIFICATION_ACCESS) {
            if (isNotificationAccessEnabled()) {
                // 通知访问权限已授予，可以继续处理逻辑
            } else {
                // 用户未授予通知访问权限，可以做相应处理
            }
        }
    }
}