1 /* 2 * Copyright (C) 2013 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.transition; 18 19 import android.util.ArrayMap; 20 import android.view.View; 21 import android.view.ViewGroup; 22 23 import java.util.Map; 24 25 /** 26 * Data structure which holds cached values for the transition. 27 * The view field is the target which all of the values pertain to. 28 * The values field is a map which holds information for fields 29 * according to names selected by the transitions. These names should 30 * be unique to avoid clobbering values stored by other transitions, 31 * such as the convention project:transition_name:property_name. For 32 * example, the platform might store a property "alpha" in a transition 33 * "Fader" as "android:fader:alpha". 34 * 35 * <p>These values are cached during the 36 * {@link Transition#captureStartValues(TransitionValues)} 37 * capture} phases of a scene change, once when the start values are captured 38 * and again when the end values are captured. These start/end values are then 39 * passed into the transitions via the 40 * for {@link Transition#createAnimator(ViewGroup, TransitionValues, TransitionValues)} 41 * method.</p> 42 */ 43 public class TransitionValues { 44 45 /** 46 * The View with these values 47 */ 48 public View view; 49 50 /** 51 * The set of values tracked by transitions for this scene 52 */ 53 public final Map<String, Object> values = new ArrayMap<String, Object>(); 54 55 @Override equals(Object other)56 public boolean equals(Object other) { 57 if (other instanceof TransitionValues) { 58 if (view == ((TransitionValues) other).view) { 59 if (values.equals(((TransitionValues) other).values)) { 60 return true; 61 } 62 } 63 } 64 return false; 65 } 66 67 @Override hashCode()68 public int hashCode() { 69 return 31*view.hashCode() + values.hashCode(); 70 } 71 72 @Override toString()73 public String toString() { 74 String returnValue = "TransitionValues@" + Integer.toHexString(hashCode()) + ":\n"; 75 returnValue += " view = " + view + "\n"; 76 returnValue += " values:"; 77 for (String s : values.keySet()) { 78 returnValue += " " + s + ": " + values.get(s) + "\n"; 79 } 80 return returnValue; 81 } 82 }