- 属性动画,属性动画是真正改变对象的某个属性的值
* 补间动画,只是一个动画效果,组件其实还在原来的位置上,xy没有改变
1、位移:
* 第一个参数target指定要显示动画的组件
* 第二个参数propertyName指定要改变组件的哪个属性
* 第三个参数values是可变参数,就是赋予属性的新的值
* 传入0,代表x起始坐标:当前x + 0
* 传入100,代表x终点坐标:当前x + 100
//具有get、set方法的成员变量就称为属性
ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "translationX", 0, 100) ;
package com.itheima.propertyanimator; import android.R.animator; import android.os.Bundle; import android.animation.Animator; import android.animation.AnimatorInflater; import android.animation.AnimatorSet; import android.animation.ObjectAnimator; import android.animation.ValueAnimator; import android.app.Activity; import android.view.Menu; import android.view.View; import android.view.View.OnClickListener; import android.view.animation.TranslateAnimation; import android.widget.ImageView; import android.widget.Toast; public class MainActivity extends Activity { private ImageView iv; private ObjectAnimator oa1; private ObjectAnimator oa2; private ObjectAnimator oa3; private ObjectAnimator oa4; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); iv = (ImageView) findViewById(R.id.iv); iv.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Toast.makeText(MainActivity.this, "点我上miss", 0).show(); } }); } public void translate(View v){ // TranslateAnimation ta = new TranslateAnimation(-100, 100, 0, 0); // ta.setDuration(2000); // ta.setFillAfter(true); // iv.startAnimation(ta); //创建属性动画师 //arg0:要操作的对象 //arg1:要修改的属性的名字 oa1 = ObjectAnimator.ofFloat(iv, "translationX", 0, 70, 30, 100); oa1.setDuration(2000); oa1.setRepeatCount(1); oa1.setRepeatMode(ValueAnimator.REVERSE); oa1.start(); } public void scale(View v){ oa2 = ObjectAnimator.ofFloat(iv, "scaleX", 0.2f, 2, 1, 2.5f); oa2.setDuration(2000); oa2.setRepeatCount(1); oa2.setRepeatMode(ValueAnimator.REVERSE); oa2.start(); } public void alpha(View v){ oa3 = ObjectAnimator.ofFloat(iv, "alpha", 0.2f, 1); oa3.setDuration(2000); oa3.setRepeatCount(1); oa3.setRepeatMode(ValueAnimator.REVERSE); oa3.start(); } public void rotate(View v){ oa4 = ObjectAnimator.ofFloat(iv, "rotation", 0, 360, 180, 720); oa4.setDuration(2000); oa4.setRepeatCount(1); oa4.setRepeatMode(ValueAnimator.REVERSE); oa4.start(); } public void fly(View v){ //创建动画师集合 AnimatorSet set = new AnimatorSet(); //排队飞 // set.playSequentially(oa1, oa2, oa3, oa4); //一起飞 set.playTogether(oa1, oa2, oa3, oa4); //设置属性动画师操作的对象 set.setTarget(iv); set.start(); } public void xml(View v){ //使用动画师填充器把xml资源文件填充成属性动画对象 Animator animator = AnimatorInflater.loadAnimator(this, R.animator.property_animation); animator.setTarget(iv); animator.start(); } }
<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=".MainActivity" > <LinearLayout android:id="@+id/ll" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="位移" android:onClick="translate" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="缩放" android:onClick="scale" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="透明" android:onClick="alpha" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="旋转" android:onClick="rotate" /> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="一起飞" android:onClick="fly" /> </LinearLayout> <Button android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="播放xml定义的动画" android:onClick="xml" android:layout_below="@id/ll" /> <ImageView android:id="@+id/iv" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_launcher" android:layout_centerInParent="true" /> </RelativeLayout>
animatorproperty_animation.xml
<?xml version="1.0" encoding="utf-8"?> <objectAnimator xmlns:android="http://schemas.android.com/apk/res/android" android:propertyName="translationY" android:duration="2000" android:repeatCount="1" android:repeatMode="reverse" android:valueFrom="0" android:valueTo="100" > </objectAnimator>
2、缩放:
* 第三个参数指定缩放的比例
* 0.1是从原本高度的十分之一开始
* 2是到原本高度的2倍结束
ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "scaleY", 0.1f, 2);
3、透明:
* 透明度,0是完全透明,1是完全不透明
ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "alpha", 0.1f, 1);
4、旋转
* rotation指定是顺时针旋转
* 20是起始角度
* 270是结束角度
ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "rotation", 20, 270);
* 属性指定为rotationX是竖直翻转
* 属性指定为rotationY是水平翻转
ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "rotationY", 20, 180);
5、可变参数
* 第三个参数可变参数可以传入多个参数,可以实现往回位移(旋转、缩放、透明)
ObjectAnimator oa = ObjectAnimator.ofFloat(bt, "translationX", 0, 70, 30, 100) ;
6、所有动画一起飞
//创建动画师集合
AnimatorSet set = new AnimatorSet();
//设置要播放动画的组件
set.setTarget(bt);
//所有动画有先后顺序的播放
//set.playSequentially(oa, oa2, oa3, oa4);
//所有动画一起播放
set.playTogether(oa, oa2, oa3, oa4);
set.start();