如何根据 TextView 的大小改变 BitmapDrawable 的大小？

Question

I have TextView with background picture in my layout and would like to apply an animation to the text only. So, as I was advised in the separate question :

you could try embedding a TextView and a BitmapDrawable in a FrameLayout, then apply the animation to the TextView.

So, the question is what should be the layout that BitmapDrawable size would be changed in accordance with TextView size always?

Answer 1

Try setting the drawable on the FrameLayout itself. The FrameLayout will be the same size as the text, because of wrap_content, and so the background will be as well. The animation should only affect the drawing, not the actual layout, so this should still work when you animate it.

<FrameLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@drawable/your_background">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Hello World" />
</FrameLayout>