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POandroid Overlay create failed. Overlay already in use error causing blank camera preview
 

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  1. POandroid Overlay create failed. Overlay already in use error causing blank camera preview
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    <p>I am using android SurfaceView to show camera preview in my activity.</p> <p>On moving to any other application which is playing any video, and on returning back, the preview is blank. I am using android 2.3.3. When I open the logcat it shows the following</p> <pre><code>E/SEC_Overlay( 107): Error - overlays already in use W/CameraService( 76): Overlay create failed - retrying E/SEC_Overlay( 107): Error - overlays already in use W/CameraService( 76): Overlay create failed - retrying E/SEC_Overlay( 107): Error - overlays already in use W/CameraService( 76): Overlay create failed - retrying E/SEC_Overlay( 107): Error - overlays already in use W/CameraService( 76): Overlay create failed - retrying E/SEC_Overlay( 107): Error - overlays already in use ... E/SEC_Overlay( 107): Error - overlays already in use W/CameraService( 76): Overlay create failed - retrying E/SEC_Overlay( 107): Error - overlays already in use W/CameraService( 76): Overlay create failed - retrying E/CameraService( 76): Overlay Creation Failed! D/AndroidRuntime( 1618): Shutting down VM W/dalvikvm( 1618): threadid=1: thread exiting with uncaught exception (group=0x40015560) E/AndroidRuntime( 1618): FATAL EXCEPTION: main E/AndroidRuntime( 1618): java.lang.RuntimeException: startPreview failed E/AndroidRuntime( 1618): at android.hardware.Camera.startPreview(Native Method) E/AndroidRuntime( 1618): at com.android.myapp.MyActivity.startCapturing(MyActivity.java:216) E/AndroidRuntime( 1618): at com.android.myapp.MyActivity.surfaceChanged(MyActivity.java:328) E/AndroidRuntime( 1618): at android.view.SurfaceView.updateWindow(SurfaceView.java:549) E/AndroidRuntime( 1618): at android.view.SurfaceView.dispatchDraw(SurfaceView.java:348) E/AndroidRuntime( 1618): at android.view.ViewGroup.drawChild(ViewGroup.java:1644) E/AndroidRuntime( 1618): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373) E/AndroidRuntime( 1618): at android.view.View.draw(View.java:6883) E/AndroidRuntime( 1618): at android.view.ViewGroup.drawChild(ViewGroup.java:1646) ... E/AndroidRuntime( 1618): at android.view.ViewGroup.dispatchDraw(ViewGroup.java:1373) E/AndroidRuntime( 1618): at android.view.View.draw(View.java:6883) E/AndroidRuntime( 1618): at android.widget.FrameLayout.draw(FrameLayout.java:357) E/AndroidRuntime( 1618): at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1862) E/AndroidRuntime( 1618): at android.view.ViewRoot.draw(ViewRoot.java:1522) E/AndroidRuntime( 1618): at android.view.ViewRoot.performTraversals(ViewRoot.java:1258) E/AndroidRuntime( 1618): at android.view.ViewRoot.handleMessage(ViewRoot.java:1859) E/AndroidRuntime( 1618): at android.os.Handler.dispatchMessage(Handler.java:99) E/AndroidRuntime( 1618): at android.os.Looper.loop(Looper.java:130) E/AndroidRuntime( 1618): at android.app.ActivityThread.main(ActivityThread.java:3683) E/AndroidRuntime( 1618): at java.lang.reflect.Method.invokeNative(Native Method) E/AndroidRuntime( 1618): at java.lang.reflect.Method.invoke(Method.java:507) E/AndroidRuntime( 1618): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) E/AndroidRuntime( 1618): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) E/AndroidRuntime( 1618): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>The code I have used is given below:</p> <pre><code> Camera mCamera; SurfaceView mPreview; @Override protected void onResume() { // TODO Auto-generated method stub try{ if(mCamera!=null){ mCamera.lock(); mCamera.release(); mCamera=null; } mPreview=((SurfaceView) findViewById(R.id.camera_preview)); mPreview.getHolder().addCallback(this); mPreview.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); }catch(Exception e){ e.printStackTrace(); } try{ mCamera = Camera.open(); }catch(Exception e){ e.printStackTrace(); } super.onResume(); } @Override protected void onPause() { // TODO Auto-generated method stub super.onPause(); try{ if(mCamera == null){ return; } mCamera.lock(); mCamera.release(); mCamera = null; }catch(Exception e){ e.printStackTrace(); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { try{ if(mCamera!=null){ Camera.Parameters params = mCamera.getParameters(); List&lt;Camera.Size&gt; sizes = params.getSupportedPreviewSizes(); Camera.Size selected = sizes.get(0); params.setPreviewSize(selected.width,selected.height); mCamera.setParameters(params); mCamera.setDisplayOrientation(90); mCamera.startPreview(); Log.v("SURF CHANGED","changed"); } }catch (Exception e) { e.printStackTrace(); } } @Override public void surfaceCreated(SurfaceHolder holder) { try { mCamera.setPreviewDisplay(mPreview.getHolder()); Log.v("SURF CREATED","created"); } catch (Exception e) { e.printStackTrace(); } } @Override public void surfaceDestroyed(SurfaceHolder holder) { Log.i("PREVIEW","surfaceDestroyed"); } </code></pre> <p>The same problem has been reported at (<a href="https://groups.google.com/forum/?fromgroups=#!topic/android-developers/ylIgXIKKGo8" rel="nofollow">https://groups.google.com/forum/?fromgroups=#!topic/android-developers/ylIgXIKKGo8</a>). But solution was not provided.</p>
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