QR Code for launching a native application

Question

2 questions about using a QR code in an Android device: 1. Is it possible to launch a native Android application from a QR code? Maybe by some configured URI schema? 2. Anot

Answer 1

To scan barcodes in Android by Intent, see https://github.com/zxing/zxing/wiki/Scanning-Via-Intent

To trigger an app from a QR code, yes, you need to register the app to handle the particular custom URL scheme. This is how the same app can respond to clicks on the web: https://github.com/zxing/zxing/wiki/Scanning-From-Web-Pages

Look at how it registers to handle URLs here: https://github.com/zxing/zxing/blob/master/android/AndroidManifest.xml

Answer 2

1.to use a configured schema you can check this post

Launch custom android application from android browser

Then the you could QR code this scheme just like market://
2. You could use Bar code scanner app and use below code to launch or you could even integrate the zxing library to scan yourself.

   Intent intent = new Intent("com.google.zxing.client.android.SCAN");
   intent.setPackage("com.google.zxing.client.android");
   intent.putExtra("SCAN_MODE",
            "ONE_D_MODE,QR_CODE_MODE,PRODUCT_MODE,DATA_MATRIX_MODE");
   startActivityForResult(intent, 0);