Android Flashlight App Stops Working

I have been writing a simple flash light app that has an on/off toggle button. The app starts and I click the 'on' button the flash comes on a stays on until I click the 'off' but

Solution 1:

Ah! It is working now. I had to modify my turnFlashOn() method like so:

public void turnFlashOn() {
    Log.i(TAG, "[42] turnFlashOn()");
    if (cam == null) {
            Log.i(TAG, "turnFlashOn() step 1");
            cam = Camera.open();
            Log.i(TAG, "[64] turnFlashOn() cam was null. Camera.open() called");
            /* new stuff */
            SurfaceView surfaceView = (SurfaceView) findViewById(R.id.preview_view);
            SurfaceHolder surfaceHolder = surfaceView.getHolder();
            Log.i(TAG, "[174] turnFlashOn() calling initCamera(surfaceHolder) hasSurface is " + hasSurface );
            initCamera(surfaceHolder);
            /* end new stuff */
    }