补件动画 / 属性动画

属性动画:

/**
     * 属性动画
     * 移动:translationX ,translationY
     * 旋转: rotation
     * 缩放: scaleX , scaleY
     * 渐变: alpha
     * */
     
     //渐变
 ObjectAnimator animator =ObjectAnimator.ofFloat(number_sign,"alpha",1.0f,0.8f,0.6f,0.4f,0.2f,0.4f,0.6f,0.8f,1f);
    animator.setDuration(2000);
    animator.setRepeatCount(-1);
    animator.setRepeatMode(ValueAnimator.REVERSE);
    animator.start();
	//缩放
    AnimatorSet animatorSetsuofang = new AnimatorSet();//组合动画
    ObjectAnimator scaleX = ObjectAnimator.ofFloat(number_sign, "scaleX", 0, 1f);
    ObjectAnimator scaleY = ObjectAnimator.ofFloat(number_sign, "scaleY", 0, 1f);
    animatorSetsuofang.setDuration(2000);
    animatorSetsuofang.setInterpolator(new DecelerateInterpolator());
    animatorSetsuofang.play(scaleX).with(scaleY);//两个动画同时开始
    animatorSetsuofang.start();
    //移动
ObjectAnimator translationX  =ObjectAnimator.ofFloat(number_sign,"translationX",0,0);
    ObjectAnimator translationY =ObjectAnimator.ofFloat(number_sign,"translationY",0,600f);
    AnimatorSet set =new AnimatorSet();
    set.playTogether(translationX,translationY);
    set.setDuration(3000);
    set.start();
    //旋转
 ObjectAnimator    objectAnimator =ObjectAnimator.ofFloat(home_iv_sport,"rotation",0f,360f);
    objectAnimator.setDuration(1000);
    objectAnimator.setRepeatCount(-1);
    objectAnimator.setRepeatMode(ValueAnimator.RESTART);

//组合
ObjectAnimator alphaAnim = ObjectAnimator.ofFloat(home_iv_add, "alpha", 1.0f, 0.5f, 0.8f, 1.0f);
    ObjectAnimator scaleXAnim = ObjectAnimator.ofFloat(home_iv_add, "scaleX", 0.0f, 1.0f);
    ObjectAnimator scaleYAnim = ObjectAnimator.ofFloat(home_iv_add, "scaleY", 0.0f, 2.0f);
    ObjectAnimator rotateAnim = ObjectAnimator.ofFloat(home_iv_add, "rotation", 0, 360);
    ObjectAnimator transXAnim = ObjectAnimator.ofFloat(home_iv_add, "translationX", 100, 400);
    @SuppressLint("ObjectAnimatorBinding")
    ObjectAnimator transYAnim = ObjectAnimator.ofFloat(home_iv_add, "tranlsationY", 100, 750);
    AnimatorSet set = new AnimatorSet();
    set.playTogether(alphaAnim, scaleXAnim, scaleYAnim, rotateAnim, transXAnim, transYAnim);
////      set.playSequentially(alphaAnim, scaleXAnim, scaleYAnim, rotateAnim, transXAnim, transYAnim);
    set.setDuration(3000);
    set.start();

补件动画

AlphaAnimation：透明度渐变效果，创建时许指定开始以及结束透明度，还有动画的持续 时间，透明度的变化范围(0,1)，0是完全透明，1是完全不透明；对应<alpha/>标签！
ScaleAnimation：缩放渐变效果，创建时需指定开始以及结束的缩放比，以及缩放参考点， 还有动画的持续时间；对应<scale/>标签！
TranslateAnimation：位移渐变效果，创建时指定起始以及结束位置，并指定动画的持续 时间即可；对应<translate/>标签！
RotateAnimation：旋转渐变效果，创建时指定动画起始以及结束的旋转角度，以及动画 持续时间和旋转的轴心；对应<rotate/>标签
AnimationSet：组合渐变，就是前面多种渐变的组合，对应<set/>标签

AlphaAnimation(透明度渐变)

fromAlpha :起始透明度
toAlpha:结束透明度

<alpha xmlns:android="http://schemas.android.com/apk/res/android"  
android:interpolator="@android:anim/accelerate_decelerate_interpolator"  
android:fromAlpha="1.0"  
android:toAlpha="0.1"  
android:duration="2000"/>

ScaleAnimation(缩放渐变)

fromXScale/fromYScale：沿着X轴/Y轴缩放的起始比例
toXScale/toYScale：沿着X轴/Y轴缩放的结束比例
pivotX/pivotY：缩放的中轴点X/Y坐标，即距离自身左边缘的位置，比如50%就是以图像的 中心为中轴点

<scale xmlns:android="http://schemas.android.com/apk/res/android"  
android:interpolator="@android:anim/accelerate_interpolator"  
android:fromXScale="0.2"  
android:toXScale="1.5"  
android:fromYScale="0.2"  
android:toYScale="1.5"  
android:pivotX="50%"  
android:pivotY="50%"  
android:duration="2000"/>

TranslateAnimation(位移渐变)

fromXDelta/fromYDelta：动画起始位置的X/Y坐标
toXDelta/toYDelta：动画结束位置的X/Y坐标

<translate xmlns:android="http://schemas.android.com/apk/res/android"  
android:interpolator="@android:anim/accelerate_decelerate_interpolator"  
android:fromXDelta="0"  
android:toXDelta="320"  
android:fromYDelta="0"  
android:toYDelta="0"  
android:duration="2000"/>

RotateAnimation(旋转渐变)

fromDegrees/toDegrees：旋转的起始/结束角度
repeatCount：旋转的次数，默认值为0，代表一次，假如是其他值，比如3，则旋转4次 另外，值为-1或者infinite时，表示动画永不停止
repeatMode：设置重复模式，默认restart，但只有当repeatCount大于0或者infinite或-1时 才有效。还可以设置成reverse，表示偶数次显示动画时会做方向相反的运动！

<rotate xmlns:android="http://schemas.android.com/apk/res/android"  
android:interpolator="@android:anim/accelerate_decelerate_interpolator"  
android:fromDegrees="0"  
android:toDegrees="360"  
android:duration="1000"  
android:repeatCount="1"  
android:repeatMode="reverse"/> 

AnimationSet(组合渐变)

<set xmlns:android="http://schemas.android.com/apk/res/android"  
android:interpolator="@android:anim/decelerate_interpolator"  
android:shareInterpolator="true" >  

<scale  
    android:duration="2000"  
    android:fromXScale="0.2"  
    android:fromYScale="0.2"  
    android:pivotX="50%"  
    android:pivotY="50%"  
    android:toXScale="1.5"  
    android:toYScale="1.5" />  

<rotate  
    android:duration="1000"  
    android:fromDegrees="0"  
    android:repeatCount="1"  
    android:repeatMode="reverse"  
    android:toDegrees="360" />  

<translate  
    android:duration="2000"  
    android:fromXDelta="0"  
    android:fromYDelta="0"  
    android:toXDelta="320"  
    android:toYDelta="0" />  

<alpha  
    android:duration="2000"  
    android:fromAlpha="1.0"  
    android:toAlpha="0.1" />  

	调用:
 Animation  animation = AnimationUtils.loadAnimation(this,
                    R.anim.anim_alpha);