kotlin动画实现上下移动、放大缩小、旋转功能

// 要实现抖动的viewvar view &＃61; findViewById(R.id.tv_hello)var set &＃61; AnimatorSet()// 向下动画(暂时不用)var downAnim &＃61; ObjectAnimator.ofFloat(view, "translationY", 0F, 30F, 0F)// 向上动画var upAnim &＃61; ObjectAnimator.ofFloat(view, "translationY", 0F, -30F, 0F)upAnim.repeatMode &＃61; ValueAnimator.REVERSEupAnim.repeatCount &＃61; Animation.INFINITEset.duration &＃61; 1000// 顺序执行动画set.playSequentially(upAnim)
// set.playSequentially(downAnim, upAnim)set.start()
2、动画——左右移动

把上面的代码中的translationY换成translationX就可实现左右运动

anim_small.xml文件代码&＃xff1a;

调用&＃xff08;代码中的view是控件经过findbyid来获得&＃xff09;&＃xff1a;

val animation: Animation &＃61;AnimationUtils.loadAnimation(this&＃64;MainActivity, R.anim.anim_small)view.startAnimation(animation)
4、动画——旋转

anim_small.xml文件代码&＃xff1a;

调用&＃xff08;代码中的view是控件经过findbyid来获得&＃xff09;&＃xff1a;

val animation: Animation &＃61;AnimationUtils.loadAnimation(this&＃64;MainActivity, R.anim.anim_small)view.startAnimation(animation)
5、动画——淡入淡出

val aset&＃61; AnimationSet(true)val aa&＃61; AlphaAnimation(1F,0F)aa.duration &＃61; 2000aa.repeatCount&＃61; Animation.INFINITEaset.addAnimation(aa)view.startAnimation(aset)