CODEWITHSUNDEEP
androidandroid-intent
enzo
enzo

Reputation: 391

Encode in QRCode using ZXING

I'm trying to encode a String in QR Code wusing ZXING library. this is the lines of code corresponding to this :

Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btn = (Button)findViewById(R.id.button1);
    btn.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            Intent intent = new Intent("com.google.zxing.client.android.ENCODE");
            intent.addCategory(Intent.CATEGORY_DEFAULT);
            intent.putExtra("ENCODE_TYPE", "TEXT_TYPE");
            intent.putExtra("ENCODE_DATA","HELLO WORLD");
            startActivityForResult(intent, 0);

        }
    });
}

After clicking on the button i have a "force close"

After looking in some websites, we say that it works just with these lines. unfortunately, it isnt for me.

PLEASE Can you give some advices to make it working. OR if you have other way to integrate a QRCode generator to my ANDROID App it will be great too.

Upvotes: 1

Views: 3786

Answers (3)

Neel Mevada
Neel Mevada

Reputation: 49

Rather than Zxing library you are also able to get the string from QRCode by using intents as below :

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 on activity result as below :

@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");
                Log.v("MESSAGE: ", contents);
                Intent in = new Intent(MainActivity2.this,MainActivity3.class);
                Bundle b3= new Bundle();
                b3.putString("content",contents);
                in.putExtras(b3);   
                startActivity(in);    

            }
        }
    }

It may be helpful for you.

Thank You.

Upvotes: -1

Marcus Ataide
Marcus Ataide

Reputation: 7540

Enzo, this is another way to get it working, try this:

private void encode(String uniqueID) {
        // TODO Auto-generated method stub
         BarcodeFormat barcodeFormat = BarcodeFormat.QR_CODE;

            int width0 = 500;
            int height0 = 500;

            int colorBack = 0xFF000000;
            int colorFront = 0xFFFFFFFF;

            QRCodeWriter writer = new QRCodeWriter();
            try
            {
                EnumMap<EncodeHintType, Object> hint = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);
                hint.put(EncodeHintType.CHARACTER_SET, "UTF-8");
                BitMatrix bitMatrix = writer.encode(uniqueID, barcodeFormat, width0, height0, hint);
                int width = bitMatrix.getWidth();
                int height = bitMatrix.getHeight();
                int[] pixels = new int[width * height];
                for (int y = 0; y < height; y++)
                {
                    int offset = y * width;
                    for (int x = 0; x < width; x++)
                    {

                        pixels[offset + x] = bitMatrix.get(x, y) ? colorBack : colorFront;
                    }
                }

                Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
                bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
                ImageView imageview = (ImageView)findViewById(R.id.qrCode);
                imageview.setImageBitmap(bitmap);
            } catch (WriterException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
    }

Upvotes: 4

biddulph.r
biddulph.r

Reputation: 5266

This line:

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

identifies the Activity you are calling with the Intent. In order for it to work that Activity must exist on the device. If you haven't implemented the Activity inside your project (that is, there is no class ENCODE inside your com.google.zxing.client.android package) then you will be calling an external application from yours. If there are no applications on the device/emulator that respond to the broadcast for com.google.zxing.client.android.ENCODE then you are not going to get anywhere with this solution.

You either need to install an application that will respond to com.google.zxing.client.android.ENCODE or find another way to do it.

It is possible to generate the barcode yourself using zxing libraries within your application. Have a look at the project here at Google Code for some downloads. This will remove your dependancy on an external application existing, providing a more thorough solution.

Upvotes: 0

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