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).

Answer 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.