Android 动画总结（补间动画，属性动画）

ゝ一纸荒年。 2022-09-29 15:48 318阅读 0赞

在开发中，为了提升用户体验，我们会添加很多动画效果，以前一直在使用，但是从来没有总结一下，最近工作轻松，所以总结一下这个方面：

这里主要是补间动画（Animation），属性动画(Animator)两类。

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*  **补间动画（Animation）**
 *  **属性动画(Animator)**
 *  **动画实例**

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## 补间动画（Animation） ##

#### 透明动画 ####

AlphaAnimation alphaAnimation = new AlphaAnimation(0, 1);
        alphaAnimation.setDuration(2000);
        iv.startAnimation(alphaAnimation);

#### 旋转动画 ####

> **注意：** RotateAnimation.RELATIVE\_TO\_SELF, 0.5f相对控件本身中点。

RotateAnimation rotateAnimation = new RotateAnimation(0, 360,            
         RotateAnimation.RELATIVE_TO_SELF, 0.5f, 
         RotateAnimation.RELATIVE_TO_SELF, 0.5f);
     rotateAnimation.setDuration(2000);
     iv.startAnimation(rotateAnimation);

#### 位移动画 ####

TranslateAnimation translateAnimation = new TranslateAnimation(0, 200, 0, 300);
    translateAnimation.setDuration(2000);
    iv.startAnimation(translateAnimation);

#### 缩放动画 ####

ScaleAnimation scaleAnimation = new ScaleAnimation(0, 2, 0, 2);
      scaleAnimation.setDuration(2000);
      iv.startAnimation(scaleAnimation);

#### 动画合集 ####

AnimationSet set = new AnimationSet(true);
                    set.setDuration(2000);
    
                    AlphaAnimation alphaAnimation2 = new AlphaAnimation(0, 1);
                    alphaAnimation2.setDuration(2000);
    
                    RotateAnimation rotateAnimation2 = new RotateAnimation(0, 360, RotateAnimation.RELATIVE_TO_SELF, 0.5f, RotateAnimation.RELATIVE_TO_SELF, 0.5f);
                    rotateAnimation2.setDuration(2000);
    
                    TranslateAnimation translateAnimation2 = new TranslateAnimation(0, 200, 0, 300);
                    translateAnimation2.setDuration(2000);
    
                    ScaleAnimation scaleAnimation2 = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
                    scaleAnimation2.setDuration(2000);
    
                    set.addAnimation(alphaAnimation2);
                    set.addAnimation(rotateAnimation2);
                    set.addAnimation(scaleAnimation2);
                    set.addAnimation(translateAnimation2);
    
                    iv.startAnimation(set);

## 属性动画(Animator) ##

#### 代码实现 ####

> **注意：ObjectAnimator.ofFloat(iv, “translationX”, 300)，初始化方法与补间动画不同，第一参数为实现动画的控件，第一个参数为动画类型，第三个为移动的数据，有时候这里是两个数据，一个开始，一个结束**。

位移动画

ObjectAnimator animator = ObjectAnimator.ofFloat(iv, "translationX", 300);
     animator.setDuration(2000);
     animator.start();

动画合集

ObjectAnimator tran = ObjectAnimator.ofFloat(iv, "translationX", 300);
     tran.setDuration(2000);
    
     ObjectAnimator scale = ObjectAnimator.ofFloat(iv, "scaleX", 0.1f, 1f);
    
     ObjectAnimator rotate = ObjectAnimator.ofFloat(iv, "rotation", 0, 360);
     rotate.setDuration(2000);
    
     AnimatorSet set = new AnimatorSet();
     set.setDuration(2000);
     set.playTogether(tran, scale, rotate);
     set.start();

#### xml实现 ####

这里粘贴guoling大神的博客，讲的很详细。  
[http://blog.csdn.net/guolin\_blog/article/details/43536355][http_blog.csdn.net_guolin_blog_article_details_43536355]

## 动画实例－－灵动菜单 ##

最后通过使用例子来加强对动画的理解。

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对于这个动画，我们怎么实现呢？它具有用户交互性，肯定是不能使用补间动画。其次只要针对不同的按钮设置不同的动画，设置相应的差值器来实现打开，合拢效果。  
打开动画如下：

//展开动画
        private void startAnim() {
            ObjectAnimator animator0 = ObjectAnimator.ofFloat(btn_menu, "alpha", 1f, 0.5f);
            ObjectAnimator animator1 = ObjectAnimator.ofFloat(buttons[0], "translationY", 300f);
            ObjectAnimator animator2 = ObjectAnimator.ofFloat(buttons[1], "translationX", 300f);
            ObjectAnimator animator3 = ObjectAnimator.ofFloat(buttons[2], "translationY", -300f);
            ObjectAnimator animator4 = ObjectAnimator.ofFloat(buttons[3], "translationX", -300f);
            AnimatorSet set = new AnimatorSet();
            set.setDuration(500);
            set.setInterpolator(new BounceInterpolator());
            set.playTogether(animator0, animator1, animator2, animator3, animator4);
            set.start();
            isOpen = true;
        }

xml布局如下；

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical">
    
    
    
        <Button android:id="@+id/btn_view1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:onClick="onClick" android:text="button1" />
    
        <Button android:id="@+id/btn_view2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:onClick="onClick" android:text="button2" />
    
        <Button android:id="@+id/btn_view3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:onClick="onClick" android:text="button3" />
    
        <Button android:id="@+id/btn_view4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:onClick="onClick" android:text="button4" />
        <Button android:id="@+id/btn_menu" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:onClick="onClick" android:text="菜单" />
    </RelativeLayout>

整体代码如下：

/** * 主要是实现点击后弹出子菜单的动画 * Created by kenway on 17/3/16 14:29 * Email : xiaokai090704@126.com */
    
    public class MenuAnimActivity extends AppCompatActivity { 
        private Button btn_menu;
        private Button[] buttons = new Button[4];
        //判断菜单是否打开
        private boolean isOpen;
    
        @Override
        protected void onCreate(@Nullable Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_menuanim);
            btn_menu = (Button) findViewById(R.id.btn_menu);
            buttons[0] = (Button) findViewById(R.id.btn_view1);
            buttons[1] = (Button) findViewById(R.id.btn_view2);
            buttons[2] = (Button) findViewById(R.id.btn_view3);
            buttons[3] = (Button) findViewById(R.id.btn_view4);
        }
    
        public void onClick(View view) {
            switch (view.getId()) {
                case R.id.btn_menu:
                    if (!isOpen) {
                        startAnim();
                    } else {
                        closeAnim();
                    }
    
                    break;
                case R.id.btn_view1:
    //
                    break;
                case R.id.btn_view2:
    
                    break;
                case R.id.btn_view3:
    
                    break;
                case R.id.btn_view4:
    
                    break;
    
            }
        }
    
        //展开动画
        private void startAnim() {
            ObjectAnimator animator0 = ObjectAnimator.ofFloat(btn_menu, "alpha", 1f, 0.5f);
            ObjectAnimator animator1 = ObjectAnimator.ofFloat(buttons[0], "translationY", 300f);
            ObjectAnimator animator2 = ObjectAnimator.ofFloat(buttons[1], "translationX", 300f);
            ObjectAnimator animator3 = ObjectAnimator.ofFloat(buttons[2], "translationY", -300f);
            ObjectAnimator animator4 = ObjectAnimator.ofFloat(buttons[3], "translationX", -300f);
            AnimatorSet set = new AnimatorSet();
            set.setDuration(500);
            set.setInterpolator(new BounceInterpolator());
            set.playTogether(animator0, animator1, animator2, animator3, animator4);
            set.start();
            isOpen = true;
        }
    
        //关闭菜单动画
        private void closeAnim() {
            ObjectAnimator animator0 = ObjectAnimator.ofFloat(btn_menu, "alpha", 0.5f, 1f);
            ObjectAnimator animator1 = ObjectAnimator.ofFloat(buttons[0], "translationY", 0);
            ObjectAnimator animator2 = ObjectAnimator.ofFloat(buttons[1], "translationX", 0);
            ObjectAnimator animator3 = ObjectAnimator.ofFloat(buttons[2], "translationY", 0);
            ObjectAnimator animator4 = ObjectAnimator.ofFloat(buttons[3], "translationX", 0);
            AnimatorSet set = new AnimatorSet();
            set.setDuration(500);
            set.setInterpolator(new BounceInterpolator());
            set.playTogether(animator0, animator1, animator2, animator3, animator4);
            set.start();
            isOpen = false;
        }
    }

其实这些代码都特别简单，通过这些代码，你是否发现一些感觉起来不好实现的功能，使用动画便可以很容易的实现。

[SouthEast]: /images/20220708/dce190a5a8a34901b3860c78ed14e93c.png
[http_blog.csdn.net_guolin_blog_article_details_43536355]: http://blog.csdn.net/guolin_blog/article/details/43536355