Android: Camera with SurfaceView

I am trying to use Android's Camera with a SurfaceView, so the the user can preview the camera. I followed various tutorials on StackOverflow, and finally ended up with Google's own tutorial, but my app crashed. Here is my code. I am using Eclipse's Android Virtual Device, emulated camera (which I don't think would affect anything) and 100mb sd card space alloted.

There are two classes, a CameraPreview object and the CameraActivity.

public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback{ private SurfaceHolder mHolder; private Camera mCamera; private final String TAG = "TAG"; public CameraPreview(Context context, Camera camera) { super(context); mCamera = camera; // Install a SurfaceHolder.Callback so we get notified when the // underlying surface is created and destroyed. mHolder = getHolder(); mHolder.addCallback(this); // deprecated setting, but required on Android versions prior to 3.0 mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } public void surfaceCreated(SurfaceHolder holder) { // The Surface has been created, now tell the camera where to draw the preview. try { mCamera.setPreviewDisplay(holder); mCamera.startPreview(); } catch (IOException e) { Log.d(TAG, "Error setting camera preview: " + e.getMessage()); } } public void surfaceDestroyed(SurfaceHolder holder) { // empty. Take care of releasing the Camera preview in your activity. } public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { // If your preview can change or rotate, take care of those events here. // Make sure to stop the preview before resizing or reformatting it. if (mHolder.getSurface() == null){ // preview surface does not exist return; } // stop preview before making changes try { mCamera.stopPreview(); } catch (Exception e){ // ignore: tried to stop a non-existent preview } // set preview size and make any resize, rotate or // reformatting changes here // start preview with new settings try { mCamera.setPreviewDisplay(mHolder); mCamera.startPreview(); } catch (Exception e){ Log.d(TAG, "Error starting camera preview: " + e.getMessage()); } } } public class CameraActivity extends Activity{ private Camera mCamera; private CameraPreview mPreview; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // Create an instance of Camera mCamera = getCameraInstance(); // Create our Preview view and set it as the content of our activity. mPreview = new CameraPreview(this, mCamera); FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview); preview.addView(mPreview); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } public Camera getCameraInstance(){ Camera c = null; try { c = Camera.open(); // attempt to get a Camera instance } catch (Exception e){ // Camera is not available (in use or does not exist) } return c; // returns null if camera is unavailable } } 

06-04 14:28:07.726: W/dalvikvm(6115): threadid=1: thread exiting with uncaught exception (group=0x40a71930) 06-04 14:28:07.956: E/AndroidRuntime(6115): FATAL EXCEPTION: main 06-04 14:28:07.956: E/AndroidRuntime(6115): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.mobilequote/com.example.mobilequote.CameraActivity}: java.lang.NullPointerException 06-04 14:28:07.956: E/AndroidRuntime(6115): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 06-04 14:28:07.956: E/AndroidRuntime(6115): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 06-04 14:28:07.956: E/AndroidRuntime(6115): at android.app.ActivityThread.access$600(ActivityThread.java:141) 06-04 14:28:07.956: E/AndroidRuntime(6115): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 06-04 14:28:07.956: E/AndroidRuntime(6115): at android.os.Handler.dispatchMessage(Handler.java:99) 06-04 14:28:07.956: E/AndroidRuntime(6115): at android.os.Looper.loop(Looper.java:137) 06-04 14:28:07.956: E/AndroidRuntime(6115): at android.app.ActivityThread.main(ActivityThread.java:5041) 06-04 14:28:07.956: E/AndroidRuntime(6115): at java.lang.reflect.Method.invokeNative(Native Method) 06-04 14:28:07.956: E/AndroidRuntime(6115): at java.lang.reflect.Method.invoke(Method.java:511) 06-04 14:28:07.956: E/AndroidRuntime(6115): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 06-04 14:28:07.956: E/AndroidRuntime(6115): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 06-04 14:28:07.956: E/AndroidRuntime(6115): at dalvik.system.NativeStart.main(Native Method) 06-04 14:28:07.956: E/AndroidRuntime(6115): Caused by: java.lang.NullPointerException 06-04 14:28:07.956: E/AndroidRuntime(6115): at com.example.mobilequote.CameraActivity.onCreate(CameraActivity.java:24) 06-04 14:28:07.956: E/AndroidRuntime(6115): at android.app.Activity.performCreate(Activity.java:5104) 06-04 14:28:07.956: E/AndroidRuntime(6115): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1080) 06-04 14:28:07.956: E/AndroidRuntime(6115): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2144) 06-04 14:28:07.956: E/AndroidRuntime(6115): ... 11 more

The line CameraActivity.java:24 is preview.addView(mPreview);