Adding blank spaces to layout

Use Space or View to add a specific amount of space. For 30 vertical density pixels:

<Space
  android:layout_width="1dp"
  android:layout_height="30dp"/>

If you need a flexible space-filler, use View between items in a LinearLayout:

<View
  android:layout_width="1dp"
  android:layout_height="match_parent"
  android:layout_weight="1"/>

<View
  android:layout_width="1dp"
  android:layout_height="0dp"
  android:layout_weight="1"/>

This works for most layouts for API 14 & later, except widgets (use FrameLayout instead).

[Updated 9/2014 to use Space. Hat tip to @Sean]

If you don't need the gap to be exactly 2 lines high, you can add an empty view like this:

    <View
        android:layout_width="fill_parent"
        android:layout_height="30dp">
    </View>

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