1 /* 2 * Copyright (C) 2017 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 package com.android.documentsui.dirlist; 17 18 import android.view.KeyEvent; 19 20 import androidx.recyclerview.selection.ItemDetailsLookup.ItemDetails; 21 22 /** 23 * KeyboardListener is implemented by {@link KeyInputHandler}. The handler 24 * must be called from RecyclerView.Holders in response to keyboard events. 25 */ 26 public abstract class KeyboardEventListener<T extends ItemDetails<?>> { 27 28 /** 29 * Handles key events on the view holder. 30 * 31 * @param details The target ItemHolder. 32 * @param keyCode Key code for the event. 33 * @param event KeyEvent for the event. 34 * 35 * @return Whether the event was handled. 36 */ onKey(T details, int keyCode, KeyEvent event)37 public abstract boolean onKey(T details, int keyCode, KeyEvent event); 38 } 39