Re: Data Matrix scanning issues

[Sean Owen]

This scans instantly in Barcode Scanner. Are you sure you are using Intents if not using IntentIntegrator? I am not sure you're really using Barcode Scanner, in which case I'd suggest it's an issue with your app. Otherwise, make sure you have actually asked to scan Data Matrix.

[STCK]

As i said in the first post, sometimes it is scanned in a few seconds or it can take minutes, and not scan at all. Sometimes i have to "zoom" in out by physically moving my camera closer to or further from the image

Here is my code....

.

 public class ScanActivity extends Activity {

String contents,format,filename,mode;

private Button bcButton;

    

    

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.scan);      

       

        this.bcButton = (Button)this.findViewById(R.id.scanBCButton);

        this.bcButton.getBackground().setColorFilter(Color.RED,PorterDuff.Mode.MULTIPLY); 

        

   //     this.QRButton = (Button)this.findViewById(R.id.scanQRButton);

    //    this.QRButton.getBackground().setColorFilter(Color.RED,PorterDuff.Mode.MULTIPLY); 

        

        Bundle extras = getIntent().getExtras(); 

        if (extras != null) { 

             filename = extras.getString("FILE_NAME"); 

             mode = extras.getString("MODE"); 

        }

    }

    

    public void ScanbuttonClickHandler(View view) {

    Intent intent = new Intent("com.google.zxing.client.android.SCAN"); 

         intent.setPackage("com.google.zxing.client.android"); 

         //intent.putExtra("SCAN_MODE","SCAN_MODE" ); 

         startActivityForResult(intent, 0); 

    }

    

    /*

    public void ScanQRbuttonClickHandler(View view) {

    Intent intent = new Intent("com.google.zxing.client.android.SCAN"); 

        intent.setPackage("com.google.zxing.client.android"); 

        intent.putExtra("SCAN_MODE", "QR_CODE_MODE"); 

        startActivityForResult(intent, 0); 

   }

   */

    

    public void onActivityResult(int requestCode, int resultCode, Intent intent) {

        if (requestCode == 0) {

            if (resultCode == RESULT_OK) {

                contents = intent.getStringExtra("SCAN_RESULT");

                format = intent.getStringExtra("SCAN_RESULT_FORMAT");

                              

                Intent intent2 = new Intent(getApplicationContext(), DisplayActivity.class); 

                intent2.putExtra("CONTENTS", contents); 

                intent2.putExtra("FILENAME", filename);

                intent2.putExtra("MODE", mode);

                

                if(mode.equals("update")){

                startActivityForResult(intent2,8);

                }else{

                startActivity(intent2);

                }

                

            } else if (resultCode == RESULT_CANCELED) {

                // Handle cancel

Toast toast = Toast.makeText(this, "Scan was Cancelled!",

Toast.LENGTH_LONG);

toast.setGravity(Gravity.TOP, 25, 500);

toast.show();

            }

        }

        

        if(requestCode==8){

        finish();

       

        }

           

    }

 

}

On Thursday, July 19, 2012 10:17:59 PM UTC+9:30, STCK wrote:

I am using an intent to "integrate" zxing into my android app (not IntentIntegrator)

I used the referenced website to create the attached code.

When i attempt to scan the code, i have varying success rates. sometimes it scans within seconds other times it takes minutes, or doesnt scan at all. i have to make the code larger or smaller in my viewfinder rectangle to get a scan

any ideas???

[STCK]

Initially i was only scanning product codes using

   intent.putExtra("SCAN_MODE","PRODUCT_MODE" );  

which i then changed to 

   intent.putExtra("SCAN_MODE","SCAN_MODE" ); 

which i have now commented out

   //intent.putExtra("SCAN_MODE","SCAN_MODE" );  

[STCK]

This wont scan either

[Sean Owen]

QR_CODE_MODE would restrict to QR codes and not scan for Data Matrix."SCAN_MODE" is not valid. Try setting "SCAN_FORMATS" to "DATA_MATRIX".

I'm not sure what the other barcode format is, maybe Code 128. It also won't scan if you select a mode that excludes that format. Or it may just be that it's too small / you're holding too close to scan effectively.

[STCK]

i get the same behaviour from my app as the Barcode Scanner app, its a bit of pot luck how long it takes to get a scan locked.

i will try with SCAN_FORMATS 

i thought if i dont pass the intent and SCAN_MODE, then it will scan for ALL formats the code supports ????

[STCK]

from many examples on the net i see 

  intent.putExtra("SCAN_MODE","PRODUCT_MODE" );   

i thought "SCAN_MODE" requests all codes support???

Does 

 intent.putExtra("SCAN_MODE","PRODUCT_MODE" );   

only scan "PRODUCT_MODE", and thus could be replaced with

  intent.putExtra("PRODUCT_MODE" );   

On Friday, July 20, 2012 4:49:10 PM UTC+9:30, Sean Owen wrote:

[Sean Owen]

The app defaults to scanning for whatever the user has selected in the app. It may or may not include 2D codes.

"PRODUCT_MODE" certainly doesn't mean all formats. It means 1D formats used to label products, like UPC. It would exclude DM.

You can't use "PRODUCT_MODE" as a key, don't know what you mean.

Like I said, as you can see Barcode Scanner scans it instantly. I think you are sending the wrong intents.

[STCK]

See my code to see I am not setting any mode. It was originally (SCAN_MODE, PRODUCT_MODE) , but I have now commented it out. I get the same behaviour as Barcode Scanner. Even with Barcode Scanner Data matrix takes some effort to get a scan.