按钮动画（带 ClipDrawable 的 TimeAnimator）无法正常工作

Question

我想通过从左到右填充按钮背景来制作动画。我使用。当我把它放在 onCreate 中时，它工作正常，但当用户 select 在我的测验中给出正确答案时，我需要为按钮设置动画。这是我的 checkAnswer 方法

fun checkAnswer(selectedAnswer: Button) {
        enableAnswersButton(false)
        if (selectedAnswer.text.toString() == listOfTests[currentQuestion].rightAnswer){
            val layerDrawable = selectedAnswer.background as LayerDrawable
            mClipDrawable =
                layerDrawable.findDrawableByLayerId(R.id.clip_drawable_false) as ClipDrawable

            mAnimator = TimeAnimator()
            mAnimator!!.setTimeListener(this)

            selectedAnswer.setOnClickListener {

                if (!mAnimator!!.isRunning) {
                    mCurrentLevel = 0;
                    mAnimator!!.start()
                }
            }
        } else {
            val layerDrawable = selectedAnswer.background as LayerDrawable
            mClipDrawable =
                layerDrawable.findDrawableByLayerId(R.id.clip_drawable_true) as ClipDrawable

            mAnimator = TimeAnimator()
            mAnimator!!.setTimeListener(this)


            selectedAnswer.setOnClickListener {

                if (!mAnimator!!.isRunning) {
                    mCurrentLevel = 0;
                    mAnimator!!.start()
                }
            }

问题是动画有时会工作。有时 onTimeUpdate 方法不被调用并且动画不工作。

  override fun onTimeUpdate(animation: TimeAnimator?, totalTime: Long, deltaTime: Long) {
        mClipDrawable!!.level = mCurrentLevel
        if (mCurrentLevel >= MAX_LEVEL) {
            mAnimator!!.cancel()
        } else {
            mCurrentLevel = min(MAX_LEVEL, mCurrentLevel + LEVEL_INCREMENT)
        }

    }

求求你帮忙

Answer 1

我已经调查了！。那里的实现很好，只是你不应该使用

  selectedAnswer.setOnClickListener {//<===this part need to be removed as its setting onClick which will work if next time same button is clicked 

            if (!mAnimator!!.isRunning) {
                mCurrentLevel = 0;
                mAnimator!!.start()
            }
        }

部分需要删除，因为它的 onClick 设置将在下次单击相同按钮时生效

如果您只想在按下任何回答按钮时播放动画。您需要 在设置答案文本选项时设置动画 views/buttons

下面的代码可以给你一个想法

   firstOptionTextView.setText(Put the Option here);

   if (firstOptionTextView.text.toString() == listOfTests[currentQuestion].rightAnswer){
        val layerDrawable = selectedAnswer.background as LayerDrawable
        mClipDrawable =
            layerDrawable.findDrawableByLayerId(R.id.clip_drawable_false) as ClipDrawable

        mAnimator = TimeAnimator()
        mAnimator!!.setTimeListener(this)

        firstOptionTextView.setOnClickListener {

            if (!mAnimator!!.isRunning) {
                mCurrentLevel = 0;
                mAnimator!!.start()
            }
        }
    } else {
        val layerDrawable = selectedAnswer.background as LayerDrawable
        mClipDrawable =
            layerDrawable.findDrawableByLayerId(R.id.clip_drawable_true) as ClipDrawable

        mAnimator = TimeAnimator()
        mAnimator!!.setTimeListener(this)


        firstOptionTextView.setOnClickListener {

            if (!mAnimator!!.isRunning) {
                mCurrentLevel = 0;
                mAnimator!!.start()
            }
        }

现在因为这个选项有一个动画师，无论是正确的还是不正确的，它都会被播放。

按钮动画（带 ClipDrawable 的 TimeAnimator）无法正常工作

Button Animation (TimeAnimator with ClipDrawable) doesn't work properly

animation

android

android-animation

kotlin