Barcode/Qr Code Reader for Android

Question

i would like to implement a QR Code/Barcode reader within my application. I would like to know what is the most lightweight solution to do this (disregarding intent integrator from zxing).

Solution 1

I used zxing to build into my application. You will need a bit of coding. First include core.jar , its at core/core.jar,in your build path, then go to their client ,its at android/..../com.google.zxing, and get their code(This is not recommended by the devs, because your copy and pasting.) last, Add this code:

   package com.wtsang02.activities;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.ChecksumException;
import com.google.zxing.FormatException;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.NotFoundException;
import com.google.zxing.Reader;
import com.google.zxing.Result;
import com.google.zxing.ResultPoint;
import com.google.zxing.common.HybridBinarizer;


public class QRDecoder extends Activity implements OnClickListener {

    private String text;
    private Button webbutton;
    private Bitmap bmp;
    private ImageView ivPicture;
    private TextView textv;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.mysales);
        webbutton = (Button)findViewById(R.id.webbutton);

        ivPicture = (ImageView) findViewById(R.id.ivPicture);
        textv= (TextView) findViewById(R.id.mytext);

        webbutton.setOnClickListener(this);
    }

    private void decode() {


        if (bmp == null) {
            Log.i("tag", "wtf");
        }
        bmp = bmp.copy(Bitmap.Config.ARGB_8888, true);

        int[] intArray = new int[bmp.getWidth() * bmp.getHeight()];
        bmp.getPixels(intArray, 0, bmp.getWidth(), 0, 0, bmp.getWidth(),
                bmp.getHeight());

        LuminanceSource source = new com.google.zxing.RGBLuminanceSource(
                bmp.getWidth(), bmp.getHeight(), intArray);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Reader reader = new MultiFormatReader();
        try {
            Result result = reader.decode(bitmap);

            text = result.getText();
            byte[] rawBytes = result.getRawBytes();
            BarcodeFormat format = result.getBarcodeFormat();
            ResultPoint[] points = result.getResultPoints();
            textv.setText(text);

        } catch (NotFoundException e) {

            e.printStackTrace();
        } catch (ChecksumException e) {

            e.printStackTrace();
        } catch (FormatException e) {

            e.printStackTrace();

        }
        Log.i("done", "done");
        if(text!=null)
        Toast.makeText(getBaseContext(), text, Toast.LENGTH_LONG).show();
        else{
            Toast.makeText(getBaseContext(), "QQ", Toast.LENGTH_LONG).show();
        }
    }

    @Override
    public void onClick(View v) {

        Intent i = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
        startActivityForResult(i, 0);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (resultCode == RESULT_OK) {
            Bundle extras = data.getExtras();
            bmp = (Bitmap) extras.get("data");
            ivPicture.setImageBitmap(bmp);
            decode();
        }

    }

}

This code will use your phone's default camera, if you need to use their client, you will need to start their CaptureActivity, Your layout should include a TextView to show results, ImageView to show the image you captured, and Button to start the camera. . This is based off of 2.1zxing.

Solution 2

You can use:

• zbar (SDK has a good example).
• zxing

Comments

[kjurkovic]

what is wrong with intent integrator from zxing?

[user1437481]

i dont want users to leave the app in order to download barcode scanner, i want a solution within the app

[Adrián Rodríguez]

you can use zxing as part of your application. Just add it as a library and use it calling the capture intent.

[user1437481]

going to give it a try in a minute

[user1437481]

get what code from the client?i misunderstood that part

[Sean Owen]

+1 for showing how to build a simple new app instead of copying the Barcode Scanner app totally.

[wtsang02]

updated the post, where i state the location. Its basiclly all in the zip file, where you downloaded zxing2.1

[user1437481]

cant seem to pick QR or BARCODE only on this one

[tejas]

This code throws me exception as soon as it starts and app crashes :(

[tejas]

com.google.zxing.NotFoundException, i was asked to add this exception while writing the lines LuminanceSource source = new RGBLuminanceSource(200, 200, intArray); BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source)); Reader reader = new MultiFormatReader(); Result result = reader.decode(bitmap);

[tejas]

While I debugged for it, I found that bitmap object is null I mean matrix is null in that. So it is throwing exception while decoding it at Result result = reader.decode(bitmap);

[tejas]

I have followed exact steps mentioned by you.Image is getting captured and is setting to the imageview but only while decoding it gives me the problem and string text becomes null and else block is executed

[wtsang02]

If you get NotFoundExcetion , 2 reasons, 1) have you correctly import the library? 2) have you added the Activity to your manifest? Since this exact code works on my device, I don't think the code is the problem.