Android(安卓)动画实现弹幕效果

Android 动画实现弹幕效果

弹幕库可以用bilibili的弹幕库实现,但是此文不是

原理是采用 ObjectAnimator 移动View做出效果

ObjectAnimator.ofFloat(mDanmuLayout002, "translationX", SCREEN_WIDTH, -SCREEN_WIDTH)

核心代码就这一块

/** * 初始化弹幕控件 */private fun initDanmakuView() {    mStartBtn.setOnClickListener {        startDanMu()    }    mStopBtn.setOnClickListener {        stopDanMu()    }    //    mDanmu001Listener = object : MainAnimListener() {        override fun onAnimationRepeat(animator: Animator) {            super.onAnimationRepeat(animator)            setDanmuContent(mDanmuLayout001, mDanmuTv001)        }    }    mDanmu002Listener = object : MainAnimListener() {        override fun onAnimationRepeat(animator: Animator) {            super.onAnimationRepeat(animator)            setDanmuContent(mDanmuLayout002, mDanmuTv002)        }    }    mDanmu003Listener = object : MainAnimListener() {        override fun onAnimationRepeat(animator: Animator) {            super.onAnimationRepeat(animator)            setDanmuContent(mDanmuLayout003, mDanmuTv003)        }    }    //    setDanmuContent(mDanmuLayout001, mDanmuTv001)    setDanmuContent(mDanmuLayout002, mDanmuTv002)    setDanmuContent(mDanmuLayout003, mDanmuTv003)    //    mAnim001 =        ObjectAnimator.ofFloat(mDanmuLayout001, "translationX", SCREEN_WIDTH, -SCREEN_WIDTH)            .apply {                duration = RandomUtil.getNum(12_000, 20_000).toLong()                repeatMode = ValueAnimator.RESTART                repeatCount = ValueAnimator.INFINITE                addListener(mDanmu001Listener)            }    mAnim002 =        ObjectAnimator.ofFloat(mDanmuLayout002, "translationX", SCREEN_WIDTH, -SCREEN_WIDTH)            .apply {                duration = RandomUtil.getNum(12_000, 20_000).toLong()                repeatMode = ValueAnimator.RESTART                repeatCount = ValueAnimator.INFINITE                addListener(mDanmu002Listener)            }    mAnim003 =        ObjectAnimator.ofFloat(mDanmuLayout003, "translationX", SCREEN_WIDTH, -SCREEN_WIDTH)            .apply {                duration = RandomUtil.getNum(12_000, 20_000).toLong()                repeatMode = ValueAnimator.RESTART                repeatCount = ValueAnimator.INFINITE                addListener(mDanmu003Listener)            }}private fun setDanmuContent(cardView: CardView, tv: TextView) {    cardView.setBackgroundResource(Constants.DANMU_BG[RandomUtil.getNum(Constants.DANMU_BG.size)])    cardView.background.alpha = Constants.DANMU_ALPHA    tv.text = Constants.DANMU_CONTENT[RandomUtil.getNum(Constants.DANMU_CONTENT.size)]}

代码中引用了常用工具类库

implementation 'com.blankj:utilcode:1.26.0'

录制软件用的"闪电GIF制作软件" 要钱的,我没付费所以有水印

源码Github

Android 动画实现弹幕效果

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