1 /* 2 * Copyright (C) 2014 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.tv.settings.widget; 18 19 import android.view.View; 20 import android.view.ViewGroup; 21 import android.widget.Adapter; 22 import android.widget.ListAdapter; 23 24 /** 25 * The adapter for ScrollAdapterView added more features controlling life cycle. 26 */ 27 public interface ScrollAdapterBase extends ListAdapter { 28 29 /** 30 * optional method to be implemented by {@link Adapter}. {@link #viewRemoved(View)} is called 31 * when a view is removed from ScrollAdapterView, this gives Adapter a chance to do some clean 32 * up work: for example release resources, cancel image downloading task. The implementation 33 * should not destroy the view hierarchy because the view might be recycled and passed as 34 * parameter in next {@link Adapter#getView(int, View, ViewGroup)}. 35 */ 36 public abstract void viewRemoved(View view); 37 38 /** 39 * Creates a scrap view to measure and decide the size of ScrollAdapterView , the difference 40 * from {@link #getView(int, View, ViewGroup)} is that it shouldn't load any runtime data for 41 * efficiency. 42 */ 43 public abstract View getScrapView(ViewGroup parent); 44 45 } 46
