Positioning overlapped view in Android

Question

Simply - how place one view on the top of another view (which can shrink) in the strictly defined place regardless of screen resolution and density?

Example - place TextView on the top of image always on pyramides. When I am using margins (Frame or Relative layout) with dp units they fail on different screen size :(

XML

<FrameLayout
  android:layout_width="wrap_content" 
  android:layout_height="wrap_content" >

    <ImageView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:src="@drawable/image" />

    <TextView
      android:id="@+id/tv"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_marginBottom="20dp"
      android:layout_marginLeft="30dp"
      android:layout_gravity="left|bottom" />

</FrameLayout>

Answer 1

When I am using margins (Frame or Relative layout) with dp units they fail on different screen size

yes they will always fail due to that other devices has different dp.

solution:

you can always use the values folder of your res folder where you put your values to the dimens.xml so your margin will always change depending on the device you are testing.