Android: Rotate whole layout

Question

I need to be able to rotate whole layouts on the fly (on the click of a button).

I am able to rotate the layouts using, eg. layout.setRotation(270.0f). The problem is, after the rotation, the layout height and width are not matching its parent's.

I have tried inverting height and width like so,

RelativeLayout layout = (RelativeLayout)findViewById(R.id.rootLayout); LayoutParams layoutParams = layout.getLayoutParams(); int height = layout.getHeight(); int width = layout.getWidth(); layoutParams.height = width; layoutParams.width = height; 

Which does nothing at all.

I am working with sdk 14.

The first image below is the app as it starts. The second one, after a rotation. I wish to fill the black "space". Any help would be appreciated.

The images below show only a button in the layout. However, in reality, the layout are a lot more complex. What I am trying to achieve is "faking" a landscape view.

Edit: Changed images and added descriptions.

Answer 1

Not sure why this is useful, but it's a nice puzzle. Here is something that works for me:

On rotate click, do this:

RelativeLayout mainLayout = (RelativeLayout) findViewById(R.id.main); int w = mainLayout.getWidth(); int h = mainLayout.getHeight();  mainLayout.setRotation(270.0f); mainLayout.setTranslationX((w - h) / 2); mainLayout.setTranslationY((h - w) / 2);  ViewGroup.LayoutParams lp = (ViewGroup.LayoutParams) mainLayout.getLayoutParams(); lp.height = w; lp.width = h; mainLayout.requestLayout(); 

And the layout:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"     xmlns:tools="http://schemas.android.com/tools"     android:layout_width="match_parent"     android:id="@+id/main"     android:layout_height="match_parent"     android:background="#ffcc88"     tools:context=".TestRotateActivity" >      <Button          android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Test"         android:layout_alignParentTop="true"         android:layout_alignParentLeft="true"         />      <Button          android:id="@+id/rotate"         android:layout_width="wrap_content"         android:layout_height="wrap_content"         android:text="Rotate"         android:layout_centerInParent="true"         />  </RelativeLayout>