Question

I have an ImageButton in my application’s Action Bar that I use to simulate a spinner for changing views by selecting the title (I’m using MonoDroid.ActionBar as a starting point – http://bit.ly/UBzI77).

Here’s the XML for the ImageButton.

 <ImageButton
      android:id="@+id/title_spinner_button"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_toRightOf="@+id/actionbar_title"/>

When I make the ImageButton background transparent by adding an android:background attribute to the XML.

 <ImageButton
      android:id="@+id/title_spinner_button"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_toRightOf="@+id/actionbar_title" 
      android:background="@null"/>

The ImageButton background disappears but the icon is centered vertically.

Does anyone know how to make the ImageButton background transparent but keep the icon aligned at the bottom of the ImageButton?

Thanks in advance.

Answer 1

Try the following in combination with your null background:

android:layout_alignParentBottom="true"
android:layout_marginBottom="3dp" // this is here just to ensure the image doesn't sit flush against the bottom of the bar, vary as required

Alternatively, you could try

android:layout_height="match_parent"
android:gravity="bottom"