StatusBarController.java revision d94d3a2aa5cd1f177f61f73733217c952e356c43
1/* 2 * Copyright (C) 2015 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 17package com.android.server.policy; 18 19import android.app.StatusBarManager; 20import android.os.IBinder; 21import android.os.RemoteException; 22import android.os.SystemClock; 23import android.util.Slog; 24import android.view.View; 25import android.view.WindowManager; 26import android.view.animation.Animation; 27import android.view.animation.AnimationSet; 28import android.view.animation.Interpolator; 29import android.view.animation.TranslateAnimation; 30 31import com.android.internal.statusbar.IStatusBarService; 32 33import static android.view.WindowManagerInternal.*; 34 35/** 36 * Implements status bar specific behavior. 37 */ 38public class StatusBarController extends BarController { 39 40 private static final long TRANSITION_DURATION = 120L; 41 42 private final AppTransitionListener mAppTransitionListener 43 = new AppTransitionListener() { 44 45 @Override 46 public void onAppTransitionPendingLocked() { 47 mHandler.post(new Runnable() { 48 @Override 49 public void run() { 50 try { 51 IStatusBarService statusbar = getStatusBarService(); 52 if (statusbar != null) { 53 statusbar.appTransitionPending(); 54 } 55 } catch (RemoteException e) { 56 Slog.e(mTag, "RemoteException when app transition is pending", e); 57 // re-acquire status bar service next time it is needed. 58 mStatusBarService = null; 59 } 60 } 61 }); 62 } 63 64 @Override 65 public void onAppTransitionStartingLocked(IBinder openToken, IBinder closeToken, 66 final Animation openAnimation, final Animation closeAnimation) { 67 mHandler.post(new Runnable() { 68 @Override 69 public void run() { 70 try { 71 IStatusBarService statusbar = getStatusBarService(); 72 if (statusbar != null) { 73 long startTime = calculateStatusBarTransitionStartTime(openAnimation, 74 closeAnimation); 75 long duration = closeAnimation != null || openAnimation != null 76 ? TRANSITION_DURATION : 0; 77 statusbar.appTransitionStarting(startTime, duration); 78 } 79 } catch (RemoteException e) { 80 Slog.e(mTag, "RemoteException when app transition is starting", e); 81 // re-acquire status bar service next time it is needed. 82 mStatusBarService = null; 83 } 84 } 85 }); 86 } 87 88 @Override 89 public void onAppTransitionCancelledLocked() { 90 mHandler.post(new Runnable() { 91 @Override 92 public void run() { 93 try { 94 IStatusBarService statusbar = getStatusBarService(); 95 if (statusbar != null) { 96 statusbar.appTransitionCancelled(); 97 } 98 } catch (RemoteException e) { 99 Slog.e(mTag, "RemoteException when app transition is cancelled", e); 100 // re-acquire status bar service next time it is needed. 101 mStatusBarService = null; 102 } 103 } 104 }); 105 } 106 }; 107 108 public StatusBarController() { 109 super("StatusBar", 110 View.STATUS_BAR_TRANSIENT, 111 View.STATUS_BAR_UNHIDE, 112 View.STATUS_BAR_TRANSLUCENT, 113 StatusBarManager.WINDOW_STATUS_BAR, 114 WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS); 115 } 116 117 public AppTransitionListener getAppTransitionListener() { 118 return mAppTransitionListener; 119 } 120 121 /** 122 * For a given app transition with {@code openAnimation} and {@code closeAnimation}, this 123 * calculates the timings for the corresponding status bar transition. 124 * 125 * @return the desired start time of the status bar transition, in uptime millis 126 */ 127 private long calculateStatusBarTransitionStartTime(Animation openAnimation, 128 Animation closeAnimation) { 129 if (openAnimation != null && closeAnimation != null) { 130 TranslateAnimation openTranslateAnimation = findTranslateAnimation(openAnimation); 131 TranslateAnimation closeTranslateAnimation = findTranslateAnimation(closeAnimation); 132 if (openTranslateAnimation != null) { 133 134 // Some interpolators are extremely quickly mostly finished, but not completely. For 135 // our purposes, we need to find the fraction for which ther interpolator is mostly 136 // there, and use that value for the calculation. 137 float t = findAlmostThereFraction(openTranslateAnimation.getInterpolator()); 138 return SystemClock.uptimeMillis() 139 + openTranslateAnimation.getStartOffset() 140 + (long)(openTranslateAnimation.getDuration()*t) - TRANSITION_DURATION; 141 } else if (closeTranslateAnimation != null) { 142 return SystemClock.uptimeMillis(); 143 } else { 144 return SystemClock.uptimeMillis(); 145 } 146 } else { 147 return SystemClock.uptimeMillis(); 148 } 149 } 150 151 /** 152 * Tries to find a {@link TranslateAnimation} inside the {@code animation}. 153 * 154 * @return the found animation, {@code null} otherwise 155 */ 156 private TranslateAnimation findTranslateAnimation(Animation animation) { 157 if (animation instanceof TranslateAnimation) { 158 return (TranslateAnimation) animation; 159 } else if (animation instanceof AnimationSet) { 160 AnimationSet set = (AnimationSet) animation; 161 for (int i = 0; i < set.getAnimations().size(); i++) { 162 Animation a = set.getAnimations().get(i); 163 if (a instanceof TranslateAnimation) { 164 return (TranslateAnimation) a; 165 } 166 } 167 } 168 return null; 169 } 170 171 /** 172 * Binary searches for a {@code t} such that there exists a {@code -0.01 < eps < 0.01} for which 173 * {@code interpolator(t + eps) > 0.99}. 174 */ 175 private float findAlmostThereFraction(Interpolator interpolator) { 176 float val = 0.5f; 177 float adj = 0.25f; 178 while (adj >= 0.01f) { 179 if (interpolator.getInterpolation(val) < 0.99f) { 180 val += adj; 181 } else { 182 val -= adj; 183 } 184 adj /= 2; 185 } 186 return val; 187 } 188} 189