1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.widget; 18 19 import android.database.Cursor; 20 21 /** 22 * This class can be used by external clients of CursorAdapter and 23 * CursorTreeAdapter to define how the content of the adapter should be 24 * filtered. 25 * 26 * @see #runQuery(CharSequence) 27 */ 28 public interface FilterQueryProvider { 29 /** 30 * Runs a query with the specified constraint. This query is requested 31 * by the filter attached to this adapter. 32 * 33 * Contract: when constraint is null or empty, the original results, 34 * prior to any filtering, must be returned. 35 * 36 * @param constraint the constraint with which the query must 37 * be filtered 38 * 39 * @return a Cursor representing the results of the new query 40 */ 41 Cursor runQuery(CharSequence constraint); 42 } 43
