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.annotation.Nullable; 21 import android.util.ArrayMap; 22 import android.view.View; 23 import android.view.ViewGroup; 24 25 import java.util.ArrayList; 26 import java.util.Map; 27 28 /** 29 * Data structure which holds cached values for the transition. 30 * The view field is the target which all of the values pertain to. 31 * The values field is a map which holds information for fields 32 * according to names selected by the transitions. These names should 33 * be unique to avoid clobbering values stored by other transitions, 34 * such as the convention project:transition_name:property_name. For 35 * example, the platform might store a property "alpha" in a transition 36 * "Fader" as "android:fader:alpha". 37 * 38 * <p>These values are cached during the 39 * {@link Transition#captureStartValues(TransitionValues)} 40 * capture} phases of a scene change, once when the start values are captured 41 * and again when the end values are captured. These start/end values are then 42 * passed into the transitions via the 43 * for {@link Transition#createAnimator(ViewGroup, TransitionValues, TransitionValues)} 44 * method.</p> 45 */ 46 public class TransitionValues { 47 48 /** @deprecated Use {@link #TransitionValues(View)} instead */ 49 @Deprecated TransitionValues()50 public TransitionValues() { 51 } 52 TransitionValues(@onNull View view)53 public TransitionValues(@NonNull View view) { 54 this.view = view; 55 } 56 57 /** 58 * The View with these values 59 */ 60 @SuppressWarnings("NullableProblems") // Can't make it final because of deprecated constructor. 61 @NonNull 62 public View view; 63 64 /** 65 * The set of values tracked by transitions for this scene 66 */ 67 @NonNull 68 public final Map<String, Object> values = new ArrayMap<String, Object>(); 69 70 /** 71 * The Transitions that targeted this view. 72 */ 73 @NonNull 74 final ArrayList<Transition> targetedTransitions = new ArrayList<Transition>(); 75 76 @Override equals(@ullable Object other)77 public boolean equals(@Nullable Object other) { 78 if (other instanceof TransitionValues) { 79 if (view == ((TransitionValues) other).view) { 80 if (values.equals(((TransitionValues) other).values)) { 81 return true; 82 } 83 } 84 } 85 return false; 86 } 87 88 @Override hashCode()89 public int hashCode() { 90 return 31*view.hashCode() + values.hashCode(); 91 } 92 93 @Override toString()94 public String toString() { 95 String returnValue = "TransitionValues@" + Integer.toHexString(hashCode()) + ":\n"; 96 returnValue += " view = " + view + "\n"; 97 returnValue += " values:"; 98 for (String s : values.keySet()) { 99 returnValue += " " + s + ": " + values.get(s) + "\n"; 100 } 101 return returnValue; 102 } 103 }