Controlling view visibility from a resources

I have a layout that contains two ImageViews. I want one of them to be visible in portrait and the other in landscape. How do I achieve it using resources? (I know how to set it programmatically for but this specific use I need to achieve it using resources).

I tried something like

in res/layout/may_layout.xml:

      android:visibility="@integer/visible_in_portrait"   <<-- is this allowed?

in res/values/integers.xml:

<!-- NOTE: 0 and 8 are VISIBLE and GONE respectively -->
<integer name="visibile_in_portrait">0</integer>
<integer name="visibile_in_landscape">8</integer>

in res/values-land/integers.xml:

<integer name="visibile_in_portrait">8</integer>
<integer name="visibile_in_landscape">0</integer>

But I get a runtime error (index out of bound) when trying to inflate the images. When I remove the android:visibility statements, the program runs but I see both images.

Q: What is the way to use a resource as a value for the android:visibility attribute?

(if you wonder why setting it programmatically will not help me, it has to do with automatic landspace/portrait switch of app widgets with file uri bitmaps).

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It is not possible. (I tried define fill_parent as string and use it for layout_width and it fails too.)

Why don’t you use 2 layouts?

  1. res/layout/may_layout.xml
  2. res/layout-land/may_layout.xml

Which each define the correct imageview to show.

In addition, having values-land may cause you problem when you needs to support multi-languages. (You will need to have value-xx-land for each language)

it will be possible when you use this trick, add your visibility line to a style and put two instances of that file in -land and normal mode.

I mean in file styles.xml in folder values put a style with name s1, and put android:visibility=visible in that, and in styles.xml in folder values-land put a style with name s1, and put android:visibility=gone.

also, in file styles.xml in folder values put a style with name s2, and put android:visibility=gone in that, and in styles.xml in folder values-land put a style with name s2, and put android:visibility=visible.

and then, set s1 to first imageview and s2 to second.

solution given by dear Calvin is also correct, but when you have a complex layout that may change during time, having one layout file would be better, and will have less need to change.

This is an old question that has already been accepted, but the following solution may help someone else:

If you check res/values/attrs.xml in Android source code, you’ll see the definition of visibility property like this:

 <!-- Controls the initial visibility of the view.  -->
    <attr name="visibility">
        <!-- Visible on screen; the default value. -->
        <enum name="visible" value="0" />
        <!-- Not displayed, but taken into account during layout (space is left for it). -->
        <enum name="invisible" value="1" />
        <!-- Completely hidden, as if the view had not been added. -->
        <enum name="gone" value="2" />

This attribute expects a string value (visible, invisible, gone) that will be parsed into (0, 1, 2) respectively. So, you can declare string resources containing these values like this:


<string name="visible_in_portrait">2</string> <!-- This is GONE -->


<string name="visible_in_landscape">0</string> <!-- This is VISIBLE -->

However, if you want to make it even better in order to stop guessing these numeric constants every time, you could do like this:


<!-- These are alias for the constants we'll reference below -->
<string name="view_visible">0</string> <!-- This is VISIBLE -->
<string name="view_invisible">1</string> <!-- This is INVISIBLE -->
<string name="view_gone">2</string> <!-- This is GONE -->

<string name="visible_in_portrait">@string/view_gone</string> <!-- We're referencing the visibility alias we declared above -->


<string name="visible_in_landscape">@string/view_visible</string>

You can use this approach or the one suggested by Keyhan. Choose the one that fits better for you.