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 17 package com.android.documentsui.sidebar; 18 19 import android.annotation.LayoutRes; 20 import android.view.DragEvent; 21 import android.view.LayoutInflater; 22 import android.view.Menu; 23 import android.view.MenuInflater; 24 import android.view.View; 25 import android.view.ViewGroup; 26 27 import com.android.documentsui.MenuManager; 28 import com.android.documentsui.R; 29 30 /** 31 * Describes a root navigation point of documents. Each one of them is presented as an item in the 32 * sidebar 33 */ 34 abstract class Item { 35 private final @LayoutRes int mLayoutId; 36 37 final String stringId; 38 Item(@ayoutRes int layoutId, String stringId)39 public Item(@LayoutRes int layoutId, String stringId) { 40 mLayoutId = layoutId; 41 this.stringId = stringId; 42 } 43 getView(View convertView, ViewGroup parent)44 public View getView(View convertView, ViewGroup parent) { 45 if (convertView == null 46 || (Integer) convertView.getTag(R.id.layout_id_tag) != mLayoutId) { 47 convertView = LayoutInflater.from(parent.getContext()) 48 .inflate(mLayoutId, parent, false); 49 } 50 convertView.setTag(R.id.layout_id_tag, mLayoutId); 51 bindView(convertView); 52 return convertView; 53 } 54 bindView(View convertView)55 abstract void bindView(View convertView); 56 isDropTarget()57 abstract boolean isDropTarget(); 58 open()59 abstract void open(); 60 dropOn(DragEvent event)61 boolean dropOn(DragEvent event) { 62 return false; 63 } 64 showAppDetails()65 boolean showAppDetails() { 66 return false; 67 } 68 createContextMenu(Menu menu, MenuInflater inflater, MenuManager menuManager)69 void createContextMenu(Menu menu, MenuInflater inflater, MenuManager menuManager) {} 70 } 71