StatusBarController.java revision 2adba07d75419462873dfeef40d4c983d832ed99
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; 32import com.android.server.LocalServices; 33import com.android.server.statusbar.StatusBarManagerInternal; 34 35import static android.view.WindowManagerInternal.*; 36 37/** 38 * Implements status bar specific behavior. 39 */ 40public class StatusBarController extends BarController { 41 42 private static final long TRANSITION_DURATION = 120L; 43 44 private final AppTransitionListener mAppTransitionListener 45 = new AppTransitionListener() { 46 47 @Override 48 public void onAppTransitionPendingLocked() { 49 mHandler.post(new Runnable() { 50 @Override 51 public void run() { 52 try { 53 IStatusBarService statusbar = getStatusBarService(); 54 if (statusbar != null) { 55 statusbar.appTransitionPending(); 56 } 57 } catch (RemoteException e) { 58 Slog.e(mTag, "RemoteException when app transition is pending", e); 59 // re-acquire status bar service next time it is needed. 60 mStatusBarService = null; 61 } 62 } 63 }); 64 } 65 66 @Override 67 public void onAppTransitionStartingLocked(IBinder openToken, IBinder closeToken, 68 final Animation openAnimation, final Animation closeAnimation) { 69 mHandler.post(new Runnable() { 70 @Override 71 public void run() { 72 try { 73 IStatusBarService statusbar = getStatusBarService(); 74 if (statusbar != null) { 75 long startTime = calculateStatusBarTransitionStartTime(openAnimation, 76 closeAnimation); 77 long duration = closeAnimation != null || openAnimation != null 78 ? TRANSITION_DURATION : 0; 79 statusbar.appTransitionStarting(startTime, duration); 80 } 81 } catch (RemoteException e) { 82 Slog.e(mTag, "RemoteException when app transition is starting", e); 83 // re-acquire status bar service next time it is needed. 84 mStatusBarService = null; 85 } 86 } 87 }); 88 } 89 90 @Override 91 public void onAppTransitionCancelledLocked() { 92 mHandler.post(new Runnable() { 93 @Override 94 public void run() { 95 try { 96 IStatusBarService statusbar = getStatusBarService(); 97 if (statusbar != null) { 98 statusbar.appTransitionCancelled(); 99 } 100 } catch (RemoteException e) { 101 Slog.e(mTag, "RemoteException when app transition is cancelled", e); 102 // re-acquire status bar service next time it is needed. 103 mStatusBarService = null; 104 } 105 } 106 }); 107 } 108 109 @Override 110 public void onAppTransitionFinishedLocked(IBinder token) { 111 mHandler.post(new Runnable() { 112 @Override 113 public void run() { 114 StatusBarManagerInternal statusbar = LocalServices.getService( 115 StatusBarManagerInternal.class); 116 if (statusbar != null) { 117 statusbar.appTransitionFinished(); 118 } 119 } 120 }); 121 } 122 }; 123 124 public StatusBarController() { 125 super("StatusBar", 126 View.STATUS_BAR_TRANSIENT, 127 View.STATUS_BAR_UNHIDE, 128 View.STATUS_BAR_TRANSLUCENT, 129 StatusBarManager.WINDOW_STATUS_BAR, 130 WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, 131 View.STATUS_BAR_TRANSPARENT); 132 } 133 134 public AppTransitionListener getAppTransitionListener() { 135 return mAppTransitionListener; 136 } 137 138 /** 139 * For a given app transition with {@code openAnimation} and {@code closeAnimation}, this 140 * calculates the timings for the corresponding status bar transition. 141 * 142 * @return the desired start time of the status bar transition, in uptime millis 143 */ 144 private static long calculateStatusBarTransitionStartTime(Animation openAnimation, 145 Animation closeAnimation) { 146 if (openAnimation != null && closeAnimation != null) { 147 TranslateAnimation openTranslateAnimation = findTranslateAnimation(openAnimation); 148 TranslateAnimation closeTranslateAnimation = findTranslateAnimation(closeAnimation); 149 if (openTranslateAnimation != null) { 150 151 // Some interpolators are extremely quickly mostly finished, but not completely. For 152 // our purposes, we need to find the fraction for which ther interpolator is mostly 153 // there, and use that value for the calculation. 154 float t = findAlmostThereFraction(openTranslateAnimation.getInterpolator()); 155 return SystemClock.uptimeMillis() 156 + openTranslateAnimation.getStartOffset() 157 + (long)(openTranslateAnimation.getDuration()*t) - TRANSITION_DURATION; 158 } else if (closeTranslateAnimation != null) { 159 return SystemClock.uptimeMillis(); 160 } else { 161 return SystemClock.uptimeMillis(); 162 } 163 } else { 164 return SystemClock.uptimeMillis(); 165 } 166 } 167 168 /** 169 * Tries to find a {@link TranslateAnimation} inside the {@code animation}. 170 * 171 * @return the found animation, {@code null} otherwise 172 */ 173 private static TranslateAnimation findTranslateAnimation(Animation animation) { 174 if (animation instanceof TranslateAnimation) { 175 return (TranslateAnimation) animation; 176 } else if (animation instanceof AnimationSet) { 177 AnimationSet set = (AnimationSet) animation; 178 for (int i = 0; i < set.getAnimations().size(); i++) { 179 Animation a = set.getAnimations().get(i); 180 if (a instanceof TranslateAnimation) { 181 return (TranslateAnimation) a; 182 } 183 } 184 } 185 return null; 186 } 187 188 /** 189 * Binary searches for a {@code t} such that there exists a {@code -0.01 < eps < 0.01} for which 190 * {@code interpolator(t + eps) > 0.99}. 191 */ 192 private static float findAlmostThereFraction(Interpolator interpolator) { 193 float val = 0.5f; 194 float adj = 0.25f; 195 while (adj >= 0.01f) { 196 if (interpolator.getInterpolation(val) < 0.99f) { 197 val += adj; 198 } else { 199 val -= adj; 200 } 201 adj /= 2; 202 } 203 return val; 204 } 205} 206