本文介绍了弃用的“"的适当替代者是什么? managedQuery"?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
Android文档说:此方法在API级别11中已弃用.
Android documentation said: This method was deprecated in API level 11.
这是代码:
class GridViewActivity_ extends Activity
{
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.gridview);
GridView gv = (GridView)findViewById(R.id.gridview);
Cursor c = managedQuery(Contacts.CONTENT_URI,
null, null, null, Contacts.DISPLAY_NAME);
String[] cols = new String[]{Contacts.DISPLAY_NAME};
int[] views = new int[] {android.R.id.text1};
SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
android.R.layout.simple_list_item_1,
c, cols, views);
gv.setAdapter(adapter);
}
}
如何替换此代码,而不是不推荐使用的代码?
How replace this code , not deprecated code?
对于活动,不是片段...
For activity, not fragment...
推荐答案
根据此出色的教程:
public class GridViewActivity extends FragmentActivity implements LoaderManager.LoaderCallbacks<Cursor>
{
private SimpleCursorAdapter mAdapter;
@Override
public Loader<Cursor> onCreateLoader(int p1, Bundle p2)
{
return new CursorLoader(this, Contacts.CONTENT_URI, null, null, null, Contacts.DISPLAY_NAME);
}
@Override
public void onLoadFinished(Loader<Cursor> p1, Cursor cursor)
{
mAdapter.swapCursor(cursor);
}
@Override
public void onLoaderReset(Loader<Cursor> cursor)
{
mAdapter.swapCursor(null);
}
@Override
protected void onCreate(Bundle savedInstanceState)
{
// TODO: Implement this method
super.onCreate(savedInstanceState);
setContentView(R.layout.gridview);
GridView gv = (GridView)findViewById(R.id.gridview);
String[] cols = new String[]{Contacts.DISPLAY_NAME};
int[] views = new int[]{android.R.id.text1};
mAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_1, null, cols,views, 0);
gv.setAdapter(mAdapter);
getSupportLoaderManager().initLoader(0, null, this);
}
}
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