java - ZXing BarCode Scanner Only Scans App Barcodes -

i have leveraged zxing barcode scanner intent, scan app barcodes (the barcodes take picture of , installs app on phone). want able scan barcodes of everyday objects, such found on soda cans , boxes of food. when put normal barcode won't detect it.

here code when call intent.

            public void onclick(view v) {              //link barcode scanner intent.             intent intent = new intent("com.google.zxing.client.android.scan");             intent.putextra("scan_mode", "qr_code_mode");                       startactivityforresult(intent, 0);          } 

can tell me i'm doing wrong? appreciated.

leave out scan_mode , scan understands.