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.annotation.NonNull; 20 import android.util.ArrayMap; 21 import android.view.View; 22 import android.view.ViewGroup; 23 24 import java.util.ArrayList; 25 import java.util.Map; 26 27 /** 28 * Data structure which holds cached values for the transition. 29 * The view field is the target which all of the values pertain to. 30 * The values field is a map which holds information for fields 31 * according to names selected by the transitions. These names should 32 * be unique to avoid clobbering values stored by other transitions, 33 * such as the convention project:transition_name:property_name. For 34 * example, the platform might store a property "alpha" in a transition 35 * "Fader" as "android:fader:alpha". 36 * 37 * <p>These values are cached during the 38 * {@link Transition#captureStartValues(TransitionValues)} 39 * capture} phases of a scene change, once when the start values are captured 40 * and again when the end values are captured. These start/end values are then 41 * passed into the transitions via the 42 * for {@link Transition#createAnimator(ViewGroup, TransitionValues, TransitionValues)} 43 * method.</p> 44 */ 45 public class TransitionValues { 46 47 /** @deprecated Use {@link #TransitionValues(View)} instead */ 48 @Deprecated TransitionValues()49 public TransitionValues() { 50 } 51 TransitionValues(@onNull View view)52 public TransitionValues(@NonNull View view) { 53 this.view = view; 54 } 55 56 /** 57 * The View with these values 58 */ 59 @SuppressWarnings("NullableProblems") // Can't make it final because of deprecated constructor. 60 @NonNull 61 public View view; 62 63 /** 64 * The set of values tracked by transitions for this scene 65 */ 66 @NonNull 67 public final Map<String, Object> values = new ArrayMap<String, Object>(); 68 69 /** 70 * The Transitions that targeted this view. 71 */ 72 @NonNull 73 final ArrayList<Transition> targetedTransitions = new ArrayList<Transition>(); 74 75 @Override equals(Object other)76 public boolean equals(Object other) { 77 if (other instanceof TransitionValues) { 78 if (view == ((TransitionValues) other).view) { 79 if (values.equals(((TransitionValues) other).values)) { 80 return true; 81 } 82 } 83 } 84 return false; 85 } 86 87 @Override hashCode()88 public int hashCode() { 89 return 31*view.hashCode() + values.hashCode(); 90 } 91 92 @Override toString()93 public String toString() { 94 String returnValue = "TransitionValues@" + Integer.toHexString(hashCode()) + ":\n"; 95 returnValue += " view = " + view + "\n"; 96 returnValue += " values:"; 97 for (String s : values.keySet()) { 98 returnValue += " " + s + ": " + values.get(s) + "\n"; 99 } 100 return returnValue; 101 } 102 }