1 /* 2 * Copyright (C) 2014 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 17 package com.android.systemui.volume; 18 19 import android.animation.Animator; 20 import android.animation.AnimatorListenerAdapter; 21 import android.content.Context; 22 import android.view.View; 23 import android.view.animation.AnimationUtils; 24 import android.view.animation.Interpolator; 25 26 public class IconPulser { 27 private static final float PULSE_SCALE = 1.1f; 28 29 private final Interpolator mFastOutSlowInInterpolator; 30 31 public IconPulser(Context context) { 32 mFastOutSlowInInterpolator = AnimationUtils.loadInterpolator(context, 33 android.R.interpolator.fast_out_slow_in); 34 } 35 36 public void start(final View target) { 37 if (target == null || target.getScaleX() != 1) return; // n/a, or already running 38 target.animate().cancel(); 39 target.animate().scaleX(PULSE_SCALE).scaleY(PULSE_SCALE) 40 .setInterpolator(mFastOutSlowInInterpolator) 41 .setListener(new AnimatorListenerAdapter() { 42 @Override 43 public void onAnimationEnd(Animator animation) { 44 target.animate().scaleX(1).scaleY(1).setListener(null); 45 } 46 }); 47 } 48 } 49
