MainActivity.java 文件源码

protected void showCurrentWord(String letter) {
        currentWord.setText(letter);
        if(!isScale){
            isScale = true;
            ViewPropertyAnimator.animate(currentWord).scaleX(1f)
                    .setInterpolator(new OvershootInterpolator())
                    .setDuration(450).start();
            ViewPropertyAnimator.animate(currentWord).scaleY(1f)
                    .setInterpolator(new OvershootInterpolator())
                    .setDuration(450).start();
        }

        //先移除之前的任务
        handler.removeCallbacksAndMessages(null);

        //延时隐藏currentWord
        handler.postDelayed(new Runnable() {
            @Override
            public void run() {
//              currentWord.setVisibility(View.INVISIBLE);
                ViewPropertyAnimator.animate(currentWord).scaleX(0f).setDuration(450).start();
                ViewPropertyAnimator.animate(currentWord).scaleY(0f).setDuration(450).start();
                isScale = false;
            }
        }, 1500);
    }