| /* |
| * 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 com.android.systemui.statusbar.phone; |
| |
| import android.view.animation.Interpolator; |
| |
| /** |
| * An implementation of a bouncer interpolator optimized for unlock hinting. |
| */ |
| public class BounceInterpolator implements Interpolator { |
| |
| private final static float SCALE_FACTOR = 7.5625f; |
| |
| @Override |
| public float getInterpolation(float t) { |
| t *= 11f / 10f; |
| if (t < 4f / 11f) { |
| return SCALE_FACTOR * t * t; |
| } else if (t < 8f / 11f) { |
| float t2 = t - 6f / 11f; |
| return SCALE_FACTOR * t2 * t2 + 3f / 4f; |
| } else if (t < 10f / 11f) { |
| float t2 = t - 9f / 11f; |
| return SCALE_FACTOR * t2 * t2 + 15f / 16f; |
| } else { |
| return 1; |
| } |
| } |
| } |