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 18 package com.android.internal.transition; 19 20 import android.transition.ChangeBounds; 21 import android.transition.Fade; 22 import android.transition.ChangeText; 23 import android.transition.Transition; 24 import android.transition.TransitionManager; 25 import android.transition.TransitionSet; 26 import android.view.ViewGroup; 27 28 public class ActionBarTransition { 29 30 private static boolean TRANSITIONS_ENABLED = false; 31 32 private static final int TRANSITION_DURATION = 120; // ms 33 34 private static final Transition sTransition; 35 36 static { 37 if (TRANSITIONS_ENABLED) { 38 final ChangeText tc = new ChangeText(); 39 tc.setChangeBehavior(ChangeText.CHANGE_BEHAVIOR_OUT_IN); 40 final TransitionSet inner = new TransitionSet(); 41 inner.addTransition(tc).addTransition(new ChangeBounds()); 42 final TransitionSet tg = new TransitionSet(); 43 tg.addTransition(new Fade(Fade.OUT)).addTransition(inner). 44 addTransition(new Fade(Fade.IN)); 45 tg.setOrdering(TransitionSet.ORDERING_SEQUENTIAL); 46 tg.setDuration(TRANSITION_DURATION); 47 sTransition = tg; 48 } else { 49 sTransition = null; 50 } 51 } 52 53 public static void beginDelayedTransition(ViewGroup sceneRoot) { 54 if (TRANSITIONS_ENABLED) { 55 TransitionManager.beginDelayedTransition(sceneRoot, sTransition); 56 } 57 } 58 } 59
