TextView的文本大小而不是整个TextView的动画 [英] Animation of a TextView's text size and not the entire TextView

问题描述

有没有一种方法可以只对TextView的文本大小设置动画而不缩放整个TextView的布局?

Is there a way to animate only the TextView's text size without scaling the entire TextView's layout?

试图达到类似的效果，请注意，当文本变小时，文本会重新调整为单行.

Am trying to achieve a similar effect, Note the text re-sizes to a single line while its size becomes smaller.

推荐答案

这可以通过ValueAnimator来实现，从我的头顶开始，我认为它应该看起来像这样:

This could be achieved with a ValueAnimator and from the top of my head I think it should look something like this:

final TextView tv = new TextView(getApplicationContext());

final float startSize = 42; // Size in pixels
final float endSize = 12;
long animationDuration = 600; // Animation duration in ms

ValueAnimator animator = ValueAnimator.ofFloat(startSize, endSize);
animator.setDuration(animationDuration);

animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
    @Override
    public void onAnimationUpdate(ValueAnimator valueAnimator) {
        float animatedValue = (float) valueAnimator.getAnimatedValue();
        tv.setTextSize(animatedValue);
    }
});

animator.start();

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