1/* 2 * Copyright (C) 2016 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 17package android.support.v4.widget; 18 19import android.os.Build; 20import android.support.annotation.NonNull; 21import android.widget.ListView; 22 23/** 24 * Helper for accessing features in {@link ListView} introduced after API level 25 * 4 in a backwards compatible fashion. 26 */ 27public final class ListViewCompat { 28 29 /** 30 * Scrolls the list items within the view by a specified number of pixels. 31 * 32 * @param listView the list to scroll 33 * @param y the amount of pixels to scroll by vertically 34 */ 35 public static void scrollListBy(@NonNull ListView listView, int y) { 36 if (Build.VERSION.SDK_INT >= 19) { 37 ListViewCompatKitKat.scrollListBy(listView, y); 38 } else { 39 ListViewCompatGingerbread.scrollListBy(listView, y); 40 } 41 } 42 43 private ListViewCompat() {} 44} 45