/**
* Runs a query with the specified constraint. This query is requested by the filter attached to
* this adapter.
*
* <p>The query is provided by a {@link android.widget.FilterQueryProvider}. If no provider is
* specified, the current cursor is not filtered and returned.
*
* <p>After this method returns the resulting cursor is passed to {@link #changeCursor(Cursor)}
* and the previous cursor is closed.
*
* <p>This method is always executed on a background thread, not on the application's main thread
* (or UI thread.)
*
* <p>Contract: when constraint is null or empty, the original results, prior to any filtering,
* must be returned.
*
* @param constraint the constraint with which the query must be filtered
* @return a Cursor representing the results of the new query
* @see #getFilter()
* @see #getFilterQueryProvider()
* @see #setFilterQueryProvider(android.widget.FilterQueryProvider)
*/
public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
if (mFilterQueryProvider != null) {
return mFilterQueryProvider.runQuery(constraint);
}
return mCursor;
}
@Override
public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
if (mCursorClosed) return null;
final FilterQueryProvider filter = getFilterQueryProvider();
if (filter != null) return filter.runQuery(constraint);
final StringBuilder where = new StringBuilder();
constraint = constraint != null ? constraint.toString().replaceAll("_", "^_") : null;
where.append(CachedUsers.SCREEN_NAME + " LIKE '" + constraint + "%' ESCAPE '^'");
where.append(" OR ");
where.append(CachedUsers.NAME + " LIKE '" + constraint + "%' ESCAPE '^'");
return mResolver.query(
CachedUsers.CONTENT_URI,
CachedUsers.COLUMNS,
constraint != null ? where.toString() : null,
null,
null);
}