空的linear_layout具有wrap_content故障

Question

I have empty LinearLayout with height set to wrap_content and it takes too much space. Should be padding or zero, but it takes around 80dp. Why? It is strange.

(same with any count of child inside, should takes space only to "cover" children, but takes more)

<LinearLayout
    android:orientation="horizontal"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/blue_bg"
</LinearLayout>

EDIT:

I've found the reason. Background drawable expands LinearLayout. Ridiculous. How to fix this?

Answer 1

Make your background smaller. You might want to use 9 PNG to make the image stretch nicely within your layout.