Android - Expandable TextView with Animation

Question

I have a TextView which firstly shows a small portion of a long text.

The user can press a \"see more\" button to expand the TextView and s

Answer 1

Smooth expanding (using heigh & ObjectAnimator)
FYI: requires API 11

public static void expandCollapsedByMaxLines(@NonNull final TextView text) {
    final int height = text.getMeasuredHeight();
    text.setHeight(height);
    text.setMaxLines(Integer.MAX_VALUE); //expand fully
    text.measure(View.MeasureSpec.makeMeasureSpec(text.getMeasuredWidth(), View.MeasureSpec.EXACTLY), View.MeasureSpec.makeMeasureSpec(ViewGroup.LayoutParams.WRAP_CONTENT, View.MeasureSpec.UNSPECIFIED));
    final int newHeight = text.getMeasuredHeight();
    ObjectAnimator animation = ObjectAnimator.ofInt(text, "height", height, newHeight);
    animation.setDuration(250).start();
}

P.S. I assume TextView limited by maxLines.
P.S.S. Thanks Amagi82 for ObjectAnimator example