无法解析输入 - Android

Question

所以我得到这个错误，说“xy无法解析为类型”和“类型KalandActivity的方法onCreateOptionsMenu（菜单）必须覆盖或实现超类型方法”代码写在另一台计算机上并在那个上运行良好。我导入它并遇到了很多问题。我尝试了一些我在网上找到的解决方案，但似乎没有任何帮助。还有其他类也有问题。有人可以提一些建议吗？

package hu.treasurefinder;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import android.R;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageView;
import android.widget.TextView;

public class KalandActivity extends ActionBarActivity {

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_kaland);

    TextView cim = (TextView) findViewById(R.id.cimView);
    final ImageView kep = (ImageView) findViewById(R.id.kepView);
    TextView szoveg = (TextView) findViewById(R.id.szovegView);
    Intent param = getIntent();
    Kaland kaland = (Kaland)param.getSerializableExtra("kaland");
    cim.setText("2");
    cim.setText(kaland.getNev());
    szoveg.setText(kaland.getLeiras());
    AsyncTask<String,Void,byte[]> task = new AsyncTask<String,Void,byte[]>() {

        @Override
        protected byte[] doInBackground(String... kep) {
            URL url;
            try {
                url = new URL("http://www.programozas-oktatas.hu/kaland/"+kep[0]);
                URLConnection conn = url.openConnection();
                InputStream is = conn.getInputStream();
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                byte[] buffer = new byte[1024];
                int readBytes;
                while ((readBytes = is.read(buffer)) != -1) {
                    baos.write(buffer, 0, readBytes);
                }
                is.close();
                return baos.toByteArray();
            } catch (IOException ex) {
                return null;
            }
        }

        @Override
        protected void onPostExecute(byte[] result) {
            super.onPostExecute(result);
            Bitmap bmp = BitmapFactory.decodeByteArray(result, 0, result.length);
            Bitmap resizedBitmap = Bitmap.createScaledBitmap(bmp, kep.getWidth(), kep.getHeight(), true);
            kep.setImageBitmap(resizedBitmap);
        }

    };
    task.execute(kaland.getKep());
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.kaland, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

}