1 /* 2 * Copyright (C) 2013 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.example.android.propertyanimations; 18 19 import android.animation.Animator; 20 import android.animation.AnimatorInflater; 21 import android.animation.AnimatorSet; 22 import android.animation.ObjectAnimator; 23 import android.animation.PropertyValuesHolder; 24 import android.animation.ValueAnimator; 25 import android.app.Activity; 26 import android.os.Bundle; 27 import android.view.View; 28 import android.widget.Button; 29 import android.widget.CheckBox; 30 31 /** 32 * This example shows how to use property animations, specifically ObjectAnimator, to perform 33 * various view animations. Compare this approach to that of the ViewAnimations demo, which 34 * shows how to achieve similar effects using the pre-3.0 animation APIs. 35 * 36 * Watch the associated video for this demo on the DevBytes channel of developer.android.com 37 * or on YouTube at https://www.youtube.com/watch?v=3UbJhmkeSig. 38 */ 39 public class PropertyAnimations extends Activity { 40 41 CheckBox mCheckBox; 42 43 @Override onCreate(Bundle savedInstanceState)44 public void onCreate(Bundle savedInstanceState) { 45 super.onCreate(savedInstanceState); 46 setContentView(R.layout.activity_property_animations); 47 48 mCheckBox = (CheckBox) findViewById(R.id.checkbox); 49 final Button alphaButton = (Button) findViewById(R.id.alphaButton); 50 final Button translateButton = (Button) findViewById(R.id.translateButton); 51 final Button rotateButton = (Button) findViewById(R.id.rotateButton); 52 final Button scaleButton = (Button) findViewById(R.id.scaleButton); 53 final Button setButton = (Button) findViewById(R.id.setButton); 54 55 // Fade the button out and back in 56 ObjectAnimator alphaAnimation = ObjectAnimator.ofFloat(alphaButton, 57 View.ALPHA, 0); 58 alphaAnimation.setRepeatCount(1); 59 alphaAnimation.setRepeatMode(ValueAnimator.REVERSE); 60 61 // Move the button over to the right and then back 62 ObjectAnimator translateAnimation = 63 ObjectAnimator.ofFloat(translateButton, View.TRANSLATION_X, 800); 64 translateAnimation.setRepeatCount(1); 65 translateAnimation.setRepeatMode(ValueAnimator.REVERSE); 66 67 // Spin the button around in a full circle 68 ObjectAnimator rotateAnimation = 69 ObjectAnimator.ofFloat(rotateButton, View.ROTATION, 360); 70 rotateAnimation.setRepeatCount(1); 71 rotateAnimation.setRepeatMode(ValueAnimator.REVERSE); 72 73 // Scale the button in X and Y. Note the use of PropertyValuesHolder to animate 74 // multiple properties on the same object in parallel. 75 PropertyValuesHolder pvhX = PropertyValuesHolder.ofFloat(View.SCALE_X, 2); 76 PropertyValuesHolder pvhY = PropertyValuesHolder.ofFloat(View.SCALE_Y, 2); 77 ObjectAnimator scaleAnimation = 78 ObjectAnimator.ofPropertyValuesHolder(scaleButton, pvhX, pvhY); 79 scaleAnimation.setRepeatCount(1); 80 scaleAnimation.setRepeatMode(ValueAnimator.REVERSE); 81 82 // Run the animations above in sequence 83 AnimatorSet setAnimation = new AnimatorSet(); 84 setAnimation.play(translateAnimation).after(alphaAnimation).before(rotateAnimation); 85 setAnimation.play(rotateAnimation).before(scaleAnimation); 86 87 setupAnimation(alphaButton, alphaAnimation, R.animator.fade); 88 setupAnimation(translateButton, translateAnimation, R.animator.move); 89 setupAnimation(rotateButton, rotateAnimation, R.animator.spin); 90 setupAnimation(scaleButton, scaleAnimation, R.animator.scale); 91 setupAnimation(setButton, setAnimation, R.animator.combo); 92 93 } 94 setupAnimation(View view, final Animator animation, final int animationID)95 private void setupAnimation(View view, final Animator animation, final int animationID) { 96 view.setOnClickListener(new View.OnClickListener() { 97 public void onClick(View v) { 98 // If the button is checked, load the animation from the given resource 99 // id instead of using the passed-in animation parameter. See the xml files 100 // for the details on those animations. 101 if (mCheckBox.isChecked()) { 102 Animator anim = AnimatorInflater.loadAnimator(PropertyAnimations.this, animationID); 103 anim.setTarget(v); 104 anim.start(); 105 return; 106 } 107 animation.start(); 108 } 109 }); 110 } 111 } 112