13dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase/* 23dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * Copyright (C) 2010 The Android Open Source Project 33dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * 43dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * Licensed under the Apache License, Version 2.0 (the "License"); 53dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * you may not use this file except in compliance with the License. 63dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * You may obtain a copy of the License at 73dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * 83dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * http://www.apache.org/licenses/LICENSE-2.0 93dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * 103dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * Unless required by applicable law or agreed to in writing, software 113dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * distributed under the License is distributed on an "AS IS" BASIS, 123dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 133dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * See the License for the specific language governing permissions and 143dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * limitations under the License. 153dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase */ 163dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase 173dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haasepackage android.animation; 183dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase 193dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haaseimport java.util.ArrayList; 202794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haaseimport java.util.Arrays; 217c608f25d494c8a0a671e7373efbb47ca635367eChet Haaseimport android.animation.Keyframe.IntKeyframe; 227c608f25d494c8a0a671e7373efbb47ca635367eChet Haaseimport android.animation.Keyframe.FloatKeyframe; 237c608f25d494c8a0a671e7373efbb47ca635367eChet Haaseimport android.animation.Keyframe.ObjectKeyframe; 242076316ce118f3685f3a28ed0e895b2c3697b191Chet Haaseimport android.util.Log; 253dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase 263dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase/** 27a18a86b43e40e3c15dcca0ae0148d641be9b25feChet Haase * This class holds a collection of Keyframe objects and is called by ValueAnimator to calculate 283dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * values between those keyframes for a given animation. The class internal to the animation 293dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * package because it is an implementation detail of how Keyframes are stored and used. 303dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase */ 313dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haaseclass KeyframeSet { 323dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase 337c608f25d494c8a0a671e7373efbb47ca635367eChet Haase int mNumKeyframes; 343dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase 3570d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase Keyframe mFirstKeyframe; 3670d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase Keyframe mLastKeyframe; 3770d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase TimeInterpolator mInterpolator; // only used in the 2-keyframe case 3870d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase ArrayList<Keyframe> mKeyframes; // only used when there are not 2 keyframes 397c608f25d494c8a0a671e7373efbb47ca635367eChet Haase TypeEvaluator mEvaluator; 407c608f25d494c8a0a671e7373efbb47ca635367eChet Haase 413dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase 423dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase public KeyframeSet(Keyframe... keyframes) { 4370d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase mNumKeyframes = keyframes.length; 443dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase mKeyframes = new ArrayList<Keyframe>(); 452794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase mKeyframes.addAll(Arrays.asList(keyframes)); 4670d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase mFirstKeyframe = mKeyframes.get(0); 4770d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase mLastKeyframe = mKeyframes.get(mNumKeyframes - 1); 4870d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase mInterpolator = mLastKeyframe.getInterpolator(); 4941f041d9986f8a5d45b6cb0b86e881c81a412168Chet Haase } 5041f041d9986f8a5d45b6cb0b86e881c81a412168Chet Haase 512794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase public static KeyframeSet ofInt(int... values) { 522794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase int numKeyframes = values.length; 537c608f25d494c8a0a671e7373efbb47ca635367eChet Haase IntKeyframe keyframes[] = new IntKeyframe[Math.max(numKeyframes,2)]; 542794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase if (numKeyframes == 1) { 557c608f25d494c8a0a671e7373efbb47ca635367eChet Haase keyframes[0] = (IntKeyframe) Keyframe.ofInt(0f); 567c608f25d494c8a0a671e7373efbb47ca635367eChet Haase keyframes[1] = (IntKeyframe) Keyframe.ofInt(1f, values[0]); 572794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } else { 587c608f25d494c8a0a671e7373efbb47ca635367eChet Haase keyframes[0] = (IntKeyframe) Keyframe.ofInt(0f, values[0]); 592794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase for (int i = 1; i < numKeyframes; ++i) { 602076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase keyframes[i] = 612076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase (IntKeyframe) Keyframe.ofInt((float) i / (numKeyframes - 1), values[i]); 622794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 632794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 647c608f25d494c8a0a671e7373efbb47ca635367eChet Haase return new IntKeyframeSet(keyframes); 652794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 662794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase 672794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase public static KeyframeSet ofFloat(float... values) { 682076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase boolean badValue = false; 692794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase int numKeyframes = values.length; 707c608f25d494c8a0a671e7373efbb47ca635367eChet Haase FloatKeyframe keyframes[] = new FloatKeyframe[Math.max(numKeyframes,2)]; 712794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase if (numKeyframes == 1) { 727c608f25d494c8a0a671e7373efbb47ca635367eChet Haase keyframes[0] = (FloatKeyframe) Keyframe.ofFloat(0f); 737c608f25d494c8a0a671e7373efbb47ca635367eChet Haase keyframes[1] = (FloatKeyframe) Keyframe.ofFloat(1f, values[0]); 742076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase if (Float.isNaN(values[0])) { 752076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase badValue = true; 762076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase } 772794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } else { 787c608f25d494c8a0a671e7373efbb47ca635367eChet Haase keyframes[0] = (FloatKeyframe) Keyframe.ofFloat(0f, values[0]); 792794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase for (int i = 1; i < numKeyframes; ++i) { 802076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase keyframes[i] = 812076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase (FloatKeyframe) Keyframe.ofFloat((float) i / (numKeyframes - 1), values[i]); 822076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase if (Float.isNaN(values[i])) { 832076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase badValue = true; 842076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase } 852794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 862794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 872076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase if (badValue) { 882076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase Log.w("Animator", "Bad value (NaN) in float animator"); 892076316ce118f3685f3a28ed0e895b2c3697b191Chet Haase } 907c608f25d494c8a0a671e7373efbb47ca635367eChet Haase return new FloatKeyframeSet(keyframes); 912794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 922794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase 937c608f25d494c8a0a671e7373efbb47ca635367eChet Haase public static KeyframeSet ofKeyframe(Keyframe... keyframes) { 947c608f25d494c8a0a671e7373efbb47ca635367eChet Haase // if all keyframes of same primitive type, create the appropriate KeyframeSet 957c608f25d494c8a0a671e7373efbb47ca635367eChet Haase int numKeyframes = keyframes.length; 967c608f25d494c8a0a671e7373efbb47ca635367eChet Haase boolean hasFloat = false; 977c608f25d494c8a0a671e7373efbb47ca635367eChet Haase boolean hasInt = false; 987c608f25d494c8a0a671e7373efbb47ca635367eChet Haase boolean hasOther = false; 997c608f25d494c8a0a671e7373efbb47ca635367eChet Haase for (int i = 0; i < numKeyframes; ++i) { 1007c608f25d494c8a0a671e7373efbb47ca635367eChet Haase if (keyframes[i] instanceof FloatKeyframe) { 1017c608f25d494c8a0a671e7373efbb47ca635367eChet Haase hasFloat = true; 1027c608f25d494c8a0a671e7373efbb47ca635367eChet Haase } else if (keyframes[i] instanceof IntKeyframe) { 1037c608f25d494c8a0a671e7373efbb47ca635367eChet Haase hasInt = true; 1047c608f25d494c8a0a671e7373efbb47ca635367eChet Haase } else { 1057c608f25d494c8a0a671e7373efbb47ca635367eChet Haase hasOther = true; 1062794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 1072794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 1087c608f25d494c8a0a671e7373efbb47ca635367eChet Haase if (hasFloat && !hasInt && !hasOther) { 1097c608f25d494c8a0a671e7373efbb47ca635367eChet Haase FloatKeyframe floatKeyframes[] = new FloatKeyframe[numKeyframes]; 1107c608f25d494c8a0a671e7373efbb47ca635367eChet Haase for (int i = 0; i < numKeyframes; ++i) { 1117c608f25d494c8a0a671e7373efbb47ca635367eChet Haase floatKeyframes[i] = (FloatKeyframe) keyframes[i]; 1127c608f25d494c8a0a671e7373efbb47ca635367eChet Haase } 1137c608f25d494c8a0a671e7373efbb47ca635367eChet Haase return new FloatKeyframeSet(floatKeyframes); 1147c608f25d494c8a0a671e7373efbb47ca635367eChet Haase } else if (hasInt && !hasFloat && !hasOther) { 1157c608f25d494c8a0a671e7373efbb47ca635367eChet Haase IntKeyframe intKeyframes[] = new IntKeyframe[numKeyframes]; 1167c608f25d494c8a0a671e7373efbb47ca635367eChet Haase for (int i = 0; i < numKeyframes; ++i) { 1177c608f25d494c8a0a671e7373efbb47ca635367eChet Haase intKeyframes[i] = (IntKeyframe) keyframes[i]; 1182794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 1197c608f25d494c8a0a671e7373efbb47ca635367eChet Haase return new IntKeyframeSet(intKeyframes); 1207c608f25d494c8a0a671e7373efbb47ca635367eChet Haase } else { 1217c608f25d494c8a0a671e7373efbb47ca635367eChet Haase return new KeyframeSet(keyframes); 1222794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 1232794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 1242794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase 1252794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase public static KeyframeSet ofObject(Object... values) { 1262794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase int numKeyframes = values.length; 1277c608f25d494c8a0a671e7373efbb47ca635367eChet Haase ObjectKeyframe keyframes[] = new ObjectKeyframe[Math.max(numKeyframes,2)]; 1282794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase if (numKeyframes == 1) { 1297c608f25d494c8a0a671e7373efbb47ca635367eChet Haase keyframes[0] = (ObjectKeyframe) Keyframe.ofObject(0f); 1307c608f25d494c8a0a671e7373efbb47ca635367eChet Haase keyframes[1] = (ObjectKeyframe) Keyframe.ofObject(1f, values[0]); 1312794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } else { 1327c608f25d494c8a0a671e7373efbb47ca635367eChet Haase keyframes[0] = (ObjectKeyframe) Keyframe.ofObject(0f, values[0]); 1332794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase for (int i = 1; i < numKeyframes; ++i) { 1347c608f25d494c8a0a671e7373efbb47ca635367eChet Haase keyframes[i] = (ObjectKeyframe) Keyframe.ofObject((float) i / (numKeyframes - 1), values[i]); 1352794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 1362794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 1372794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase return new KeyframeSet(keyframes); 1382794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase } 1392794eb3b02e2404d453d3ad22a8a85a138130a07Chet Haase 1403dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase /** 1417c608f25d494c8a0a671e7373efbb47ca635367eChet Haase * Sets the TypeEvaluator to be used when calculating animated values. This object 1427c608f25d494c8a0a671e7373efbb47ca635367eChet Haase * is required only for KeyframeSets that are not either IntKeyframeSet or FloatKeyframeSet, 1437c608f25d494c8a0a671e7373efbb47ca635367eChet Haase * both of which assume their own evaluator to speed up calculations with those primitive 1447c608f25d494c8a0a671e7373efbb47ca635367eChet Haase * types. 1457c608f25d494c8a0a671e7373efbb47ca635367eChet Haase * 1467c608f25d494c8a0a671e7373efbb47ca635367eChet Haase * @param evaluator The TypeEvaluator to be used to calculate animated values. 1477c608f25d494c8a0a671e7373efbb47ca635367eChet Haase */ 1487c608f25d494c8a0a671e7373efbb47ca635367eChet Haase public void setEvaluator(TypeEvaluator evaluator) { 1497c608f25d494c8a0a671e7373efbb47ca635367eChet Haase mEvaluator = evaluator; 1507c608f25d494c8a0a671e7373efbb47ca635367eChet Haase } 1517c608f25d494c8a0a671e7373efbb47ca635367eChet Haase 1527c608f25d494c8a0a671e7373efbb47ca635367eChet Haase @Override 1537c608f25d494c8a0a671e7373efbb47ca635367eChet Haase public KeyframeSet clone() { 1547c608f25d494c8a0a671e7373efbb47ca635367eChet Haase ArrayList<Keyframe> keyframes = mKeyframes; 1557c608f25d494c8a0a671e7373efbb47ca635367eChet Haase int numKeyframes = mKeyframes.size(); 1567c608f25d494c8a0a671e7373efbb47ca635367eChet Haase Keyframe[] newKeyframes = new Keyframe[numKeyframes]; 1577c608f25d494c8a0a671e7373efbb47ca635367eChet Haase for (int i = 0; i < numKeyframes; ++i) { 1587c608f25d494c8a0a671e7373efbb47ca635367eChet Haase newKeyframes[i] = keyframes.get(i).clone(); 1597c608f25d494c8a0a671e7373efbb47ca635367eChet Haase } 1607c608f25d494c8a0a671e7373efbb47ca635367eChet Haase KeyframeSet newSet = new KeyframeSet(newKeyframes); 1617c608f25d494c8a0a671e7373efbb47ca635367eChet Haase return newSet; 1627c608f25d494c8a0a671e7373efbb47ca635367eChet Haase } 1637c608f25d494c8a0a671e7373efbb47ca635367eChet Haase 1647c608f25d494c8a0a671e7373efbb47ca635367eChet Haase /** 1653dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * Gets the animated value, given the elapsed fraction of the animation (interpolated by the 1663dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * animation's interpolator) and the evaluator used to calculate in-between values. This 1673dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * function maps the input fraction to the appropriate keyframe interval and a fraction 1683dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * between them and returns the interpolated value. Note that the input fraction may fall 1693dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * outside the [0-1] bounds, if the animation's interpolator made that happen (e.g., a 1703dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * spring interpolation that might send the fraction past 1.0). We handle this situation by 1713dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * just using the two keyframes at the appropriate end when the value is outside those bounds. 1723dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * 1733dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * @param fraction The elapsed fraction of the animation 1743dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase * @return The animated value. 1753dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase */ 1767c608f25d494c8a0a671e7373efbb47ca635367eChet Haase public Object getValue(float fraction) { 17770d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase 17870d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase // Special-case optimization for the common case of only two keyframes 17970d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase if (mNumKeyframes == 2) { 18070d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase if (mInterpolator != null) { 18170d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase fraction = mInterpolator.getInterpolation(fraction); 18270d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase } 1837c608f25d494c8a0a671e7373efbb47ca635367eChet Haase return mEvaluator.evaluate(fraction, mFirstKeyframe.getValue(), 18470d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase mLastKeyframe.getValue()); 18570d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase } 1863dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase if (fraction <= 0f) { 1873dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase final Keyframe nextKeyframe = mKeyframes.get(1); 188e0ee2e9f3102c3c14c873a75a7b04e49787e0fb9Chet Haase final TimeInterpolator interpolator = nextKeyframe.getInterpolator(); 1893dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase if (interpolator != null) { 1903dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase fraction = interpolator.getInterpolation(fraction); 1913dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase } 19270d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase final float prevFraction = mFirstKeyframe.getFraction(); 19370d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase float intervalFraction = (fraction - prevFraction) / 19470d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase (nextKeyframe.getFraction() - prevFraction); 1957c608f25d494c8a0a671e7373efbb47ca635367eChet Haase return mEvaluator.evaluate(intervalFraction, mFirstKeyframe.getValue(), 1963dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase nextKeyframe.getValue()); 1973dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase } else if (fraction >= 1f) { 1983dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase final Keyframe prevKeyframe = mKeyframes.get(mNumKeyframes - 2); 19970d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase final TimeInterpolator interpolator = mLastKeyframe.getInterpolator(); 2003dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase if (interpolator != null) { 2013dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase fraction = interpolator.getInterpolation(fraction); 2023dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase } 20370d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase final float prevFraction = prevKeyframe.getFraction(); 20470d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase float intervalFraction = (fraction - prevFraction) / 20570d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase (mLastKeyframe.getFraction() - prevFraction); 2067c608f25d494c8a0a671e7373efbb47ca635367eChet Haase return mEvaluator.evaluate(intervalFraction, prevKeyframe.getValue(), 20770d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase mLastKeyframe.getValue()); 2083dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase } 20970d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase Keyframe prevKeyframe = mFirstKeyframe; 2103dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase for (int i = 1; i < mNumKeyframes; ++i) { 2113dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase Keyframe nextKeyframe = mKeyframes.get(i); 2123dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase if (fraction < nextKeyframe.getFraction()) { 213e0ee2e9f3102c3c14c873a75a7b04e49787e0fb9Chet Haase final TimeInterpolator interpolator = nextKeyframe.getInterpolator(); 2143dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase if (interpolator != null) { 2153dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase fraction = interpolator.getInterpolation(fraction); 2163dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase } 21770d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase final float prevFraction = prevKeyframe.getFraction(); 21870d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase float intervalFraction = (fraction - prevFraction) / 21970d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase (nextKeyframe.getFraction() - prevFraction); 2207c608f25d494c8a0a671e7373efbb47ca635367eChet Haase return mEvaluator.evaluate(intervalFraction, prevKeyframe.getValue(), 2213dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase nextKeyframe.getValue()); 2223dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase } 2233dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase prevKeyframe = nextKeyframe; 2243dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase } 22570d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase // shouldn't reach here 22670d4ba15b1f0c1133c5aabc86de828b41e482fffChet Haase return mLastKeyframe.getValue(); 2273dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase } 228e9140a72b1059574046a624b471b2c3a35806496Chet Haase 229e9140a72b1059574046a624b471b2c3a35806496Chet Haase @Override 230e9140a72b1059574046a624b471b2c3a35806496Chet Haase public String toString() { 231e9140a72b1059574046a624b471b2c3a35806496Chet Haase String returnVal = " "; 232e9140a72b1059574046a624b471b2c3a35806496Chet Haase for (int i = 0; i < mNumKeyframes; ++i) { 233e9140a72b1059574046a624b471b2c3a35806496Chet Haase returnVal += mKeyframes.get(i).getValue() + " "; 234e9140a72b1059574046a624b471b2c3a35806496Chet Haase } 235e9140a72b1059574046a624b471b2c3a35806496Chet Haase return returnVal; 236e9140a72b1059574046a624b471b2c3a35806496Chet Haase } 2373dd207a6dbd5d9244dc7fe213d5caa3cddaff0dbChet Haase} 238