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.animation.Animator; 20 import android.animation.ObjectAnimator; 21 import android.view.View; 22 import android.view.ViewGroup; 23 24 /** 25 * This transition captures the rotation property of targets before and after 26 * the scene change and animates any changes. 27 * 28 * @hide 29 */ 30 public class Rotate extends Transition { 31 32 private static final String PROPNAME_ROTATION = "android:rotate:rotation"; 33 34 @Override 35 public void captureStartValues(TransitionValues transitionValues) { 36 transitionValues.values.put(PROPNAME_ROTATION, transitionValues.view.getRotation()); 37 } 38 39 @Override 40 public void captureEndValues(TransitionValues transitionValues) { 41 transitionValues.values.put(PROPNAME_ROTATION, transitionValues.view.getRotation()); 42 } 43 44 @Override 45 public Animator createAnimator(ViewGroup sceneRoot, TransitionValues startValues, 46 TransitionValues endValues) { 47 if (startValues == null || endValues == null) { 48 return null; 49 } 50 final View view = endValues.view; 51 float startRotation = (Float) startValues.values.get(PROPNAME_ROTATION); 52 float endRotation = (Float) endValues.values.get(PROPNAME_ROTATION); 53 if (startRotation != endRotation) { 54 view.setRotation(startRotation); 55 return ObjectAnimator.ofFloat(view, View.ROTATION, 56 startRotation, endRotation); 57 } 58 return null; 59 } 60 } 61
