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copied!<p><strong>EDIT</strong></p> <p>This is a tough one to answer, I can't be 100% sure what's causing your exceptions right now. I have included my Camera code below, hopefully that will help, I use <code>startCamera()</code> and <code>stopCamera()</code> methods that I call in <code>onPause</code> and <code>onResume</code>. I also, only create a new instance of the <code>CameraPreview</code> class in my <code>onCreate</code>, I don't re-instantiate in <code>onResume</code> unless my <code>cameraView == null</code>. There are a couple things we do differently. Hopefully the code below will help, maybe you can play with it to get yours working:</p> <p><em>P.S.: Everything works for me. i.e. Going into other Activities, etc. The only part of the Lifecycle I haven't tested is <code>onDestroy</code>, but that is because my application is designed to start at the beginning in this cycle.</em></p> <p><strong>MainActivity:</strong></p> <pre><code>boolean cameraReleased = false; @Override protected void onPause() { Log.i("onPause", "CALLED:: cameraReleased = " + cameraReleased); Log.i("onResume", "CALLED:: cameraView = " + cameraView.toString()); if (cameraReleased == false) { image = null; imageResult.setImageBitmap(null); imageResult.setImageResource(0); cameraView.stopCamera(); cameraReleased = true; } if (cameraView == null) { Log.i("onPause", "cameraView == null"); cameraView = new JJCameraSurfaceView(getApplicationContext()); imageResult = new ImageView(getApplicationContext()); } super.onPause(); } @Override protected void onDestroy() { Log.e("onDestroy", "INITIATED"); super.onDestroy(); } @Override protected void onResume() { Log.i("onResume", "CALLED:: cameraReleased = " + cameraReleased); Log.i("onResume", "CALLED:: cameraView = " + cameraView.toString()); if (cameraReleased == true) { image = null; imageResult.setImageBitmap(null); imageResult.setImageResource(0); cameraView.startCamera(); } if (cameraView == null) { Log.i("onResume", "cameraView == null"); cameraView = new JJCameraPreview(getApplicationContext()); imageResult = new ImageView(getApplicationContext()); } super.onResume(); } @Override public void onBackPressed() { // If Statement used to get out of my camera view and back to my MainActivity - Same Class if (“Camera Preview or Image Result is displayed”) { cameraView.stopCamera(); image = null; imageResult.setImageBitmap(null); imageResult.setImageResource(0); cameraView.startCamera(); return; } Log.i("onBackPressed", "WAS PRESSED"); super.onBackPressed(); } </code></pre> <p><strong>CameraPreview:</strong></p> <pre><code>public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { Log.w("surfaceChanged", "STARTED"); if (camera != null) { Log.w("surfaceChanged", "camera = NOT NULL"); Camera.Parameters cParams = camera.getParameters(); cParams.setPreviewSize(width, height); cParams.setSceneMode(Parameters.SCENE_MODE_NIGHT); camera.setParameters(cParams); camera.startPreview(); } } public void surfaceCreated(SurfaceHolder holder) { Log.w("surfaceCreated", "STARTED"); if (camera == null) { camera = Camera.open(); } try { camera.setPreviewDisplay(mHolder); } catch (Exception e) { Log.e("setPreviewDisplay", "FAILED: " + e.getMessage()); } } public void surfaceDestroyed(SurfaceHolder holder) { Log.w("CameraSurfaceDestroyed", "INITIATED"); camera.stopPreview(); camera.release(); camera = null; } public void startCamera() { Log.w("startCamera", "CALLED"); mHolder = getHolder(); surfaceCreated(mHolder); camera.startPreview(); mHolder.addCallback(this); } public void stopCamera() { mHolder = getHolder(); mHolder.removeCallback(this); camera.stopPreview(); } </code></pre>

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