Question

 private boolean isOffersHidden = false; 



findViewById(R.id.imgHideOffers).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

            Animation animationOffers;

            if(!isOffersHidden){
                animationOffers = AnimationUtils.loadAnimation(MainActivity.this, R.anim.right_side);
                findViewById(R.id.lyOfffersContainer).setAnimation(animationOffers);
                findViewById(R.id.lyOfffersContainer).startAnimation(animationOffers);


                reduceHeight(findViewById(R.id.lyOfffersContainer));

                isOffersHidden = true;
            }else{
                animationOffers = AnimationUtils.loadAnimation(MainActivity.this, R.anim.appear_offers);
                findViewById(R.id.lyOfffersContainer).setAnimation(animationOffers);
                findViewById(R.id.lyOfffersContainer).startAnimation(animationOffers);

                increaseHeight(findViewById(R.id.lyOfffersContainer));

                isOffersHidden = false;
            }

        }

    });

  //Im using this piece of code to reduce my view height:

  private void reduceHeight(final View v) {

    ValueAnimator va = ValueAnimator.ofInt(v.getHeight(), 0);
    va.setDuration(1500);
    va.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        public void onAnimationUpdate(ValueAnimator animation) {
            v.getLayoutParams().height = (Integer) animation.getAnimatedValue();
            v.requestLayout();
        }
    });

    va.start();
}


//Im using this code to increase my view height:

private void increaseHeight(final View v){

    ValueAnimator va = ValueAnimator.ofInt(0, 220);
    va.setDuration(1500);
    va.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        public void onAnimationUpdate(ValueAnimator animation) {
            v.getLayoutParams().height = (Integer) animation.getAnimatedValue();
            v.requestLayout();
        }
    });

    va.start();
}

当我减小视图高度时，一切正常，但是当我再次尝试增大高度时，它变得不可见：

普通视图：

减小和增加视图高度后

我希望您能理解我的问题，我不是以编程方式将视图设置为不可见，如何解决此问题？

Answer 1

是的，问题出在您的onClick函数上。 reduceHeight和increaseHeight需要时间来补充。在代码中，如果单击得足够快，将并行运行2个进程（减少和增加）。这会使您的onClick函数不可靠。要修复此问题，您应该在启动新动画之前取消动画师，例如：

ValueAnimator va = null; // make this animator global
private void reduceHeight(final View v) {
if(va != null) va.end(); // end the running animation; you should call this in the increaseHeight function as well. 
va = ValueAnimator.ofInt(v.getHeight(), 0);
va.setDuration(1500);
va.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
    public void onAnimationUpdate(ValueAnimator animation) {
        v.getLayoutParams().height = (Integer) animation.getAnimatedValue();
        v.requestLayout();
        //remember to set va = null when animation ends.
    }
});
va.start();
}

更改高度后，我的视图不可见

1 个答案: