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    <p>It more or less follows your code with a few changes.</p> <pre><code>import java.io.IOException; import android.hardware.Camera; import android.view.SurfaceHolder; public class GenericaCamera implements SurfaceHolder.Callback { private Camera cameraDevice = null; private SurfaceHolder cameraSurfaceHolder = null; // MODIFIED FROM ORIGINAL SEE UPDATE AT BOTTOM public GenericaCamera(SurfaceHolder holder) { cameraSurfaceHolder = holder; cameraSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); cameraSurfaceHolder.addCallback(this); } // Required camera surface holder interface Callback's public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { Camera.Parameters params = cameraDevice.getParameters(); Camera.Size size = getBestPreviewSize(params,w,h); if (size != null) params.setPreviewSize(size.width, size.height); cameraDevice.startPreview(); } // When the surface is ready then we can build the camera and attach // the camera preview output to the UI holder public void surfaceCreated(SurfaceHolder holder) { try { cameraDevice = Camera.open(); cameraDevice.setPreviewDisplay(cameraSurfaceHolder); } catch (IOException e) { } } // Stop the camera preview and dispose of the camera object public void surfaceDestroyed(SurfaceHolder holder) { if (null == cameraDevice) return; cameraDevice.stopPreview(); cameraDevice.release(); cameraDevice = null; } public Camera.Size getBestPreviewSize(Camera.Parameters parameters, int w, int h) { Camera.Size result = null; for (Camera.Size size : parameters.getSupportedPreviewSizes()) { if (size.width &lt;= w &amp;&amp; size.height &lt;= h) { if (null == result) result = size; else { int resultDelta = w - result.width + h - result.height; int newDelta = w - size.width + h - size.height; if (newDelta &lt; resultDelta) result = size; } } } return result; } </code></pre> <p>}</p> <p><strong>Update</strong></p> <p>Went into the wallpaper code and figured it out, still problems but at least I got it to basically work, order of when is important because of the push buffers setup </p> <p>Problems </p> <ol> <li><p>Not in landscape mode, this causes a distorted image to be previewed, known issue of the camera just havent tried to lock into landscape yet</p></li> <li><p>In preview if you use back key everything is destroyed properly (camera released) but if you set the wallpaper the class does not call the onDestroy method so this means that you can't get the camera because the preview instance of the class has not released it</p></li> <li><p>It also shows up as the lock screen image, not sure how to override that, probably receive and respond via intents and turn it off when you are in the guard/lock screen</p></li> <li><p>Have not handled visibility event, so other camera classes won't work, potential unnecessary battery drain etc. </p></li> </ol> <p>Anyway with all of that said the modifications are as follows to get this to at least start working</p> <p>In the engine class create the camera from the above class in the onCreate, any later and problems occur because of the push buffers setup, and even though this is deprecated in later 2.3+ it is still required in older versions. Matter of fact have not tested this above 2.2 yet. </p> <pre><code>@Override public void onCreate(SurfaceHolder holder) { Log.d("CameraWallpaper","onCreate(SurfaceHolder holder)"); if (null == GC) GC = new GenericaCamera(holder); super.onCreate(holder); } </code></pre> <p>Then in the GenericCamera class change to the following constructor pattern</p> <pre><code>public GenericaCamera(SurfaceHolder holder) { cameraSurfaceHolder = holder; cameraSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); cameraSurfaceHolder.addCallback(this); } </code></pre> <p>That's basically it, at least this should get you started, and if you find any solutions to 1-4 let the community know! </p> <p><strong>Update 2</strong></p> <p>It seems that Android 3+ breaks this, not sure why since the source for those platforms is still closed.</p> <p>So final answer for upto 2.3 is that above works, but on 3+ it will not. </p>
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    1. COOk I tried simply putting your code in wholesale and instantiating it at surfaceCreated() of my code and passing it the SurfaceHandler. (I modified your class a bit to take in SurfaceHandlers instead of SurfaceViews. The same problem persists, I am beginning to think that the wallpaper surface is not suitable for camera.
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    2. COOr maybe not.... https://market.android.com/details?id=com.yaji.viewfinder
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    3. COActually, the error changed, it is now breaking startPreview() instead of setPreviewSize()
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