| /* |
| * 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.volume; |
| |
| import android.animation.Animator; |
| import android.animation.AnimatorListenerAdapter; |
| import android.content.Context; |
| import android.view.View; |
| import android.view.animation.AnimationUtils; |
| import android.view.animation.Interpolator; |
| |
| public class IconPulser { |
| private static final float PULSE_SCALE = 1.1f; |
| |
| private final Interpolator mFastOutSlowInInterpolator; |
| |
| public IconPulser(Context context) { |
| mFastOutSlowInInterpolator = AnimationUtils.loadInterpolator(context, |
| android.R.interpolator.fast_out_slow_in); |
| } |
| |
| public void start(final View target) { |
| if (target == null || target.getScaleX() != 1) return; // n/a, or already running |
| target.animate().cancel(); |
| target.animate().scaleX(PULSE_SCALE).scaleY(PULSE_SCALE) |
| .setInterpolator(mFastOutSlowInInterpolator) |
| .setListener(new AnimatorListenerAdapter() { |
| @Override |
| public void onAnimationEnd(Animator animation) { |
| target.animate().scaleX(1).scaleY(1).setListener(null); |
| } |
| }); |
| } |
| } |