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copied!<p>Please take a look at my code:</p> <pre><code> public class PonyWallpaper extends AnimationWallpaper { /*some code here*/ class PonyEngine extends AnimationEngine { /*some code here as well*/ @Override public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) { Log.v("orientation changed", "w: "+width + " h: " + height + " width desired: " + this.getDesiredMinimumWidth() + " height desired: " + this.getDesiredMinimumHeight()); </code></pre> <p>with AnimationEngine declared as</p> <pre><code>protected abstract class AnimationEngine extends android.service.wallpaper.WallpaperService.Engine </code></pre> <p>The output when switching to portrait from landscape:</p> <blockquote> <p>orientation changed(352): w: 800 h: 480 width desired: 960 height desired: 800</p> </blockquote> <p>The output when switching to landscape from portrait: </p> <blockquote> <p>orientation changed(352): w: 480 h: 800 width desired: 960 height desired: 800</p> </blockquote> <p>As you can see, method onSurfaceChanged of the android.service.wallpaper.WallpaperService.Engine class is called every time an orientation gets changed. </p> <p>From what i've noticed, </p> <blockquote> <p>this.getDesiredMinimumWidth()</p> </blockquote> <p>and </p> <blockquote> <p>this.getDesiredMinimumHeight()</p> </blockquote> <p>don't change and are maximum possible values of width and height. </p> <p>My solution was: </p> <ul> <li>to pass width, desired width, height and desired height to a method of my drawer object;</li> <li>to call drawObject() - like methods with a coordinates ranging from 0.0 to 1.0;</li> <li>to scale those values inside drawer object to logical coordinates described by desired width and desired height;</li> <li>to set an offset of a real x coordinates judging by xPixelOffset passed by </li> </ul> <blockquote> <p>onOffsetsChanged</p> </blockquote> <p>method of </p> <blockquote> <p>android.service.wallpaper.WallpaperService.Engine</p> </blockquote> <ul> <li>to set an offeset of a real y coordinates judging by difference of a real height and desired height.</li> </ul> <p>I hope that will help!</p>

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