onItemClick,Intent,startActivity错误

Question

我的代码:

package elf.app;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import elf.app.entity.ELFList;
import elf.app.entity.Entry;
import elf.app.test.FakeComm;

// TODO Kunna skicka att något är färdigt (ett rum är städat).

public class RoomListActivity extends ListActivity {
private ELFList eList;
//  private FakeComm fakecomm;
private Bundle extras;

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    this.extras = getIntent().getExtras();
    eList = new ELFList();

//      fakecomm = new FakeComm();
//      eList.add(fakecomm.getData());

    String[] strArr = {"asd","sdf","dfg"};
    eList.add(strArr);

    String[] str = eList.returnNames();


    setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, str));

    ListView lv = getListView();
    lv.setTextFilterEnabled(true);

    lv.setOnItemClickListener(new OnItemClickListener() {
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            Entry e = eList.getEntry(position);
            String roominfo = e.toString();


            Intent intent = new Intent(this, RoomInfoActivity.class);
            intent.putExtra("entry",roominfo);
            this.startActivity(intent);

                // old stuff
            // String message;
            // message = eList.getEntryInfo(position);
            // Toast.makeText(getApplicationContext(),
            // message, Toast.LENGTH_SHORT).show();
        }
    });
}

}

我在以下几行收到错误:

Intent intent = new Intent(this, RoomInfoActivity.class);

和

this.startActivity(intent);

我没有太多线索为什么我得到这些错误,编辑器中针对这些错误的确切输出是:

• "构造函数Intent(new AdapterView.OnItemClickListener(){},Class)未定义"
• "对于类型new AdapterView.OnItemClickListener(){},未定义方法startActivity(Intent)"

我是一个Android新手,所以请考虑到这一点,但我已经研究了Java大约一年.

Answer 1

固定

Intent intent = new Intent(this, RoomInfoActivity.class);

至

Intent intent = new Intent(RoomListActivity.this, RoomInfoActivity.class);

该错误是因为this您引用OnClickListener.如果您参考活动,问题就解决了this.第二个错误是相同的 - 错误的引用.只需删除this,startActivity()方法也将在封闭类中搜索.