Property (属性动画)

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XML加载动画需要在创建animator文件夹，

res/animator 文件中（注意不是 res/anim，两者不一样）

<?xml version="1.0" encoding="utf-8"?><set xmlns:android="http://schemas.android.com/apk/res/android">    <objectAnimator android:duration="3000"                    android:propertyName="alpha"                    android:valueFrom="1.0"                    android:valueTo="0.0"/></set>

布局文件中

<?xml version="1.0" encoding="utf-8"?><RelativeLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.moliying.a57_property_animation.MainActivity">    <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:maxWidth="200dp"        android:maxHeight="200dp"        android:adjustViewBounds="true"        android:onClick="imageClick"        android:id="@+id/imageView" android:layout_alignParentTop="true"        android:layout_alignParentStart="true" android:src="@mipmap/jj"/>    <ImageView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:id="@+id/imageView2"        android:onClick="musicClick"        android:src="@mipmap/music_stack"        android:layout_alignParentTop="true" android:layout_centerHorizontal="true"/></RelativeLayout>

package com.moliying.a57_property_animation;import android.animation.Animator;import android.animation.AnimatorInflater;import android.animation.AnimatorListenerAdapter;import android.animation.AnimatorSet;import android.animation.ObjectAnimator;import android.animation.PropertyValuesHolder;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.view.ViewGroup;import android.view.animation.AccelerateInterpolator;import android.view.animation.BounceInterpolator;public class MainActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);    }    public void musicClick(View view){        final View v = view;//        DisplayMetrics dm = new DisplayMetrics();//        getWindowManager().getDefaultDisplay().getMetrics(dm);//        //定义一个动画//        ValueAnimator va = ValueAnimator.ofFloat(v.getY(),dm.heightPixels,v.getY()).setDuration(1000);//        //监听动画的动作变化//        va.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {//            @Override//            public void onAnimationUpdate(ValueAnimator animation) {//                v.setTranslationY((Float) animation.getAnimatedValue());//            }//        });//        va.start();        //组合多个动画效果        ObjectAnimator a1 = ObjectAnimator.ofFloat(view,"translationX",0f,200f);        a1.setInterpolator(new AccelerateInterpolator()); //添加插值器        ObjectAnimator a2 = ObjectAnimator.ofFloat(view,"translationY",0f,200f);        a2.setInterpolator(new AccelerateInterpolator());//添加插值器        ObjectAnimator a3 = ObjectAnimator.ofFloat(view,"rotation",0f,360f);        a3.setInterpolator(new BounceInterpolator());//添加插值器        AnimatorSet set = new AnimatorSet();        set.setDuration(1000);//        set.playTogether(a1,a2,a3);//同时执行//        set.setStartDelay(1000);//延迟多少时间执行//        set.playSequentially(a1,a2,a3); //顺序执行        set.play(a1).with(a2);//先a1,a2一起执行,之后再执行a3        set.play(a3).after(a1);        set.start();    }    public void imageClick(View view){//        ObjectAnimator.ofFloat(view,"rotationX",0f,360f).setDuration(500).start();//        propertyValuesHolder(view);//        alphaValuesAnimator(view);        //通过加载XML动画文件        Animator a = AnimatorInflater.loadAnimator(this,R.animator.anim_alpha);        a.setTarget(view);        a.start();    }    /**     * 为动画添加监听事件, 来删除组件     * @param view     */    public void alphaValuesAnimator(View view){        final View v = view;        ObjectAnimator oa = ObjectAnimator.ofFloat(v,"alpha",1f,0f).setDuration(1000);//        oa.addListener(new Animator.AnimatorListener() {//            @Override//            public void onAnimationStart(Animator animation) {//                //动画开始//            }////            @Override//            public void onAnimationEnd(Animator animation) {//                //动画结束//                ViewGroup viewGroup = (ViewGroup) v.getParent();//                if(viewGroup!=null){//                    viewGroup.removeView(v);//                    System.out.println("removed.");//                }//            }////            @Override//            public void onAnimationCancel(Animator animation) {//                //动画取消//            }////            @Override//            public void onAnimationRepeat(Animator animation) {//                //重复//            }//        });        oa.addListener(new AnimatorListenerAdapter() {            @Override            public void onAnimationEnd(Animator animation) {                //动画结束                ViewGroup viewGroup = (ViewGroup) v.getParent();                if(viewGroup!=null){                    viewGroup.removeView(v);                    System.out.println("removed.");                }            }        });        oa.start();    }    /**     * 组合多个属性动画     * @param view     */    public void propertyValuesHolder(View view){        PropertyValuesHolder p1 = PropertyValuesHolder.ofFloat("alpha",1f,0f,1f);        PropertyValuesHolder p2 = PropertyValuesHolder.ofFloat("scaleX",1f,0f,1f);        PropertyValuesHolder p3 = PropertyValuesHolder.ofFloat("scaleY",1f,0f,1f);        ObjectAnimator.ofPropertyValuesHolder(view,p1,p2,p3).setDuration(3000).start();    }}

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