I found a tutorial on how to scan a barcode. But in my application I have to scan a QR code. How can I a scan QR code in Android?
try {
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.putExtra("SCAN_MODE", "QR_CODE_MODE"); // "PRODUCT_MODE for bar codes
startActivityForResult(intent, 0);
} catch (Exception e) {
Uri marketUri = Uri.parse("market://details?id=com.google.zxing.client.android");
Intent marketIntent = new Intent(Intent.ACTION_VIEW,marketUri);
startActivity(marketIntent);
}
and in onActivityResult():
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 0) {
if (resultCode == RESULT_OK) {
String contents = data.getStringExtra("SCAN_RESULT");
}
if(resultCode == RESULT_CANCELLED){
//handle cancel
}
}
}
The current recommendation is to use the Android Barcode API, which works locally (offline), without requiring a server roundtrip:
The Barcode API detects barcodes in real-time, on device, in any orientation. It can also detect multiple barcodes at once.
It reads the following barcode formats:
- 1D barcodes: EAN-13, EAN-8, UPC-A, UPC-E, Code-39, Code-93, Code-128, ITF, Codabar
- 2D barcodes: QR Code, Data Matrix, PDF-417, AZTEC
It automatically parses QR Codes, Data Matrix, PDF-417, and Aztec values, for the following supported formats:
- URL
- Contact information (VCARD, etc.)
- Calendar event
- Phone
- SMS
- ISBN
- WiFi
- Geo-location (latitude and longitude)
- AAMVA driver license/ID
Check out the codelab - Barcode Detection with the Mobile Vision API.
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