动画基础

Posted 2020-10-12 Androidc_CY

 // ValueAnimator anim=ValueAnimator.ofFloat(0f,1f);整数过度
 //从0平滑过渡到1，时间为300毫秒

 final ValueAnimator anim = ValueAnimator.ofFloat(0f, 300f);
 anim.setDuration(300);
 anim.start();
 anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
     @Override
     public void onAnimationUpdate(ValueAnimator animation) {
         float currentValue = (float) animation.getAnimatedValue();
         Log.d("TAG", "current value is " + currentValue);
     }
 });*/
// alpha透明

ObjectAnimator animator=ObjectAnimator.ofFloat(imageView,"alpha"1f,0f，1f);

 // rotation 旋转

 ObjectAnimator animator=ObjectAnimator.ofFloat(imageView,"rotation",0f,360f);

 animator.setDuration(5000);
 animator.start();
//移出屏幕外

float x=imageView.getTranslationX();
ObjectAnimator animator=ObjectAnimator.ofFloat(imageView,"translationX",x,-500f,x);
Y轴缩放

ObjectAnimator animator=ObjectAnimator.ofFloat(imageView,"scaleY",1f,3f,1f);
组合动画

ObjectAnimator moveIn=ObjectAnimator.ofFloat(textView,"translationX",-500f,0f);
ObjectAnimator roate=ObjectAnimator.ofFloat(textView,"rotation",0f,360f);
ObjectAnimator fadeInOut=ObjectAnimator.ofFloat(textView,"alpha",1f,0f,1f);
AnimatorSet animatorSet=new AnimatorSet();
animatorSet.play(roate).with(fadeInOut).after(moveIn);
animatorSet.setDuration(5000);
animatorSet.start();