ZXing BarCode Scanner Only Scans App Barcodes

I have leveraged the ZXing barcode scanner intent, but it will only scan App barcodes (the barcodes that you take a picture of and it installs the app on your phone). I want it to be able to scan the barcodes of everyday objects, such as those found on soda cans and boxes of food. When I put it up to a normal barcode it won't detect it.

Here is the code for when I call the intent.

            public void onClick(View v) {

            //Link to the Barcode Scanner intent.
            Intent intent = new Intent("com.google.zxing.clie开发者_JS百科nt.android.SCAN");
            intent.putExtra("SCAN_MODE", "QR_CODE_MODE");         

            startActivityForResult(intent, 0);

        }

Can you tell me what I'm doing wrong? Any help is appreciated.

Leave out the SCAN_MODE extra and it will scan anything it understands.