| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.view; |
| |
| import android.os.Parcel; |
| import android.os.Parcelable; |
| |
| /** |
| * This class contains window animation frame statistics. For example, a window |
| * animation is usually performed when the application is transitioning from one |
| * activity to another. The frame statistics are a snapshot for the time interval |
| * from {@link #getStartTimeNano()} to {@link #getEndTimeNano()}. |
| * <p> |
| * The key idea is that in order to provide a smooth user experience the system should |
| * run window animations at a specific time interval obtained by calling {@link |
| * #getRefreshPeriodNano()}. If the system does not render a frame every refresh |
| * period the user will see irregular window transitions. The time when the frame was |
| * actually presented on the display by calling {@link #getFramePresentedTimeNano(int)}. |
| */ |
| public final class WindowAnimationFrameStats extends FrameStats implements Parcelable { |
| /** |
| * @hide |
| */ |
| public WindowAnimationFrameStats() { |
| /* do nothing */ |
| } |
| |
| /** |
| * Initializes this isntance. |
| * |
| * @param refreshPeriodNano The display refresh period. |
| * @param framesPresentedTimeNano The presented frame times. |
| * |
| * @hide |
| */ |
| public void init(long refreshPeriodNano, long[] framesPresentedTimeNano) { |
| mRefreshPeriodNano = refreshPeriodNano; |
| mFramesPresentedTimeNano = framesPresentedTimeNano; |
| } |
| |
| private WindowAnimationFrameStats(Parcel parcel) { |
| mRefreshPeriodNano = parcel.readLong(); |
| mFramesPresentedTimeNano = parcel.createLongArray(); |
| } |
| |
| @Override |
| public int describeContents() { |
| return 0; |
| } |
| |
| @Override |
| public void writeToParcel(Parcel parcel, int flags) { |
| parcel.writeLong(mRefreshPeriodNano); |
| parcel.writeLongArray(mFramesPresentedTimeNano); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder builder = new StringBuilder(); |
| builder.append("WindowAnimationFrameStats["); |
| builder.append("frameCount:" + getFrameCount()); |
| builder.append(", fromTimeNano:" + getStartTimeNano()); |
| builder.append(", toTimeNano:" + getEndTimeNano()); |
| builder.append(']'); |
| return builder.toString(); |
| } |
| |
| public static final Creator<WindowAnimationFrameStats> CREATOR = |
| new Creator<WindowAnimationFrameStats>() { |
| @Override |
| public WindowAnimationFrameStats createFromParcel(Parcel parcel) { |
| return new WindowAnimationFrameStats(parcel); |
| } |
| |
| @Override |
| public WindowAnimationFrameStats[] newArray(int size) { |
| return new WindowAnimationFrameStats[size]; |
| } |
| }; |
| } |