public IntentIntegrator setCaptureActivity(Class<?> captureActivity) {
        this.captureActivity = captureActivity;
        return this;
    }
Set the Activity class to use. It can be any activity, but should handle the intent extras
as used here.

@param captureActivity the class
zxing-android-embedded/src/com/google/zxing/integration/android/IntentIntegrator.java