Question

创建CursorLoader时，我收到“swapCursor（Cursor）未定义”错误。我有导入了android.support.v4（app.LoaderManager，app.LoaderManager.Loader，Content.CursorLoader，content.Loader）。不知道我能做些什么来纠正这个问题。请指教。

装载机：

 import android.support.v4.app.Fragment;
 import android.support.v4.app.FragmentActivity;
 import android.support.v4.app.LoaderManager;
 import android.support.v4.content.CursorLoader;
 import android.support.v4.content.Loader;
 import android.support.v4.app.ListFragment;
 import android.support.v4.widget.CursorAdapter;


 public class LoginList extends FragmentActivity implements OnClickListener,      AdapterView.OnItemClickListener, LoaderManager.LoaderCallbacks<Cursor> {

private ListView loginList;
private Button webLogin;
private SimpleCursorAdapter adapter;


@Override 
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.login_listview);

loginList = (ListView)findViewById(R.id.loginlist);
loginList.setOnItemClickListener(this);

webLogin = (Button)findViewById(R.id.button3);
webLogin.setOnClickListener(this);



//Specify fileds to display in the list
String[] from = new String[] { ListProvider.COLUMN_NAME_SITE };

//Bind fields to listview
int[] to = new int[] {R.id.loginlist};

// Create CursorAdapter and set it to display
adapter = new SimpleCursorAdapter(this, R.layout.login_listview, null, from, to);

loginList.setAdapter(adapter);

getSupportLoaderManager().initLoader(0, null, this);
}


/*@Override
public void onViewCreated(View view, Bundle savedInstanceState) {

super.onViewCreated(view, savedInstanceState);
setEmptyText(getResources().getString(string.app_name));
rwgisterForContextMenu(getListView());
setHasOptionsMenu(true);
    } */


    @Override
    public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
// TODO Auto-generated method stub
Toast.makeText(getApplicationContext(), "Selected ID :" + arg2, Toast.LENGTH_SHORT).show();

    Intent updateDeleteLoginInfo = new Intent (this, UpdateDeleteLoginList.class);


    Cursor clickedObject = (Cursor)loginList.getItemAtPosition(arg2);

Bundle loginBundle = new Bundle();
loginBundle.putString("clickedWebSite",((LoginDetails) clickedObject).getsName());
loginBundle.putString("clickedWebAddress",((LoginDetails) clickedObject).getwUrl());
loginBundle.putString("clickedUserName",((LoginDetails) clickedObject).getuName());
loginBundle.putString("clickedPassWord",((LoginDetails) clickedObject).getpWord());
loginBundle.putString("clickedNotes",((LoginDetails) clickedObject).getlNotes());

updateDeleteLoginInfo.putExtras(loginBundle);

startActivityForResult(updateDeleteLoginInfo, 0); 
 }

 @Override
 public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent webLoginIntent = new Intent (this, LoginPlusActivity.class);
startActivity(webLoginIntent);
}

@Override
public Loader<Cursor> onCreateLoader(int ignored, final Bundle args) {
return new CursorLoader(this, ListProvider.CONTENT_URI, null, null, null, null);
 }

@Override
public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) {
adapter.swapCursor(cursor); /* swapCursor error: The method swapCursor(Cursor) is undefined for the type SimpleCursorAdapter */


 }

 @Override
 public void onLoaderReset (Loader<Cursor> loader) {
adapter.swapCursor(null); /* swapCursor error: The method swapCursor(Cursor) is undefined for the type SimpleCursorAdapter */

  }

  }

Answer 1

通过导入v4.widget.simplecursoradapter解决了

问题。

import android.support.v4.widget.SimpleCursorAdapter;

对于SimpleCursorAdapter类型，未定义swapCursor（Cursor）

1 个答案: