Generate barcode image in Android application

You can use zxing library to generate barcode easily.

first, locate core.jar under libs folder.

libs/core.jar

You can download ZXing-2.1.zip from here.

http://repo1.maven.org/maven2/com/google/zxing/ (source)

After unzipping the file, find the jar file.

\ZXing-2.1\zxing-2.1\core\core.jar

And then write your own code like below.

import java.util.EnumMap;import java.util.Map;import android.app.Activity;import android.graphics.Bitmap;import android.os.Bundle;import android.view.Gravity;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.LinearLayout.LayoutParams;import android.widget.TextView;import com.google.zxing.BarcodeFormat;import com.google.zxing.EncodeHintType;import com.google.zxing.MultiFormatWriter;import com.google.zxing.WriterException;import com.google.zxing.common.BitMatrix;public class BarcodeExampleActivity extends Activity {    @Override    protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    LinearLayout l = new LinearLayout(this);    l.setLayoutParams(new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));    l.setOrientation(LinearLayout.VERTICAL);    setContentView(l);    // barcode data    String barcode_data = "123456";    // barcode image    Bitmap bitmap = null;    ImageView iv = new ImageView(this);    try {        bitmap = encodeAsBitmap(barcode_data, BarcodeFormat.CODE_128, 600, 300);        iv.setImageBitmap(bitmap);    } catch (WriterException e) {        e.printStackTrace();    }    l.addView(iv);    //barcode text    TextView tv = new TextView(this);    tv.setGravity(Gravity.CENTER_HORIZONTAL);    tv.setText(barcode_data);    l.addView(tv);    }    /**************************************************************     * getting from com.google.zxing.client.android.encode.QRCodeEncoder     *      * See the sites below     * http://code.google.com/p/zxing/     * http://code.google.com/p/zxing/source/browse/trunk/android/src/com/google/zxing/client/android/encode/EncodeActivity.java     * http://code.google.com/p/zxing/source/browse/trunk/android/src/com/google/zxing/client/android/encode/QRCodeEncoder.java     */    private static final int WHITE = 0xFFFFFFFF;    private static final int BLACK = 0xFF000000;    Bitmap encodeAsBitmap(String contents, BarcodeFormat format, int img_width, int img_height) throws WriterException {    String contentsToEncode = contents;    if (contentsToEncode == null) {        return null;    }    Map<EncodeHintType, Object> hints = null;    String encoding = guessAppropriateEncoding(contentsToEncode);    if (encoding != null) {        hints = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);        hints.put(EncodeHintType.CHARACTER_SET, encoding);    }    MultiFormatWriter writer = new MultiFormatWriter();    BitMatrix result;    try {        result = writer.encode(contentsToEncode, format, img_width, img_height, hints);    } catch (IllegalArgumentException iae) {        // Unsupported format        return null;    }    int width = result.getWidth();    int height = result.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] = result.get(x, y) ? BLACK : WHITE;        }    }    Bitmap bitmap = Bitmap.createBitmap(width, height,        Bitmap.Config.ARGB_8888);    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);    return bitmap;    }    private static String guessAppropriateEncoding(CharSequence contents) {    // Very crude at the moment    for (int i = 0; i < contents.length(); i++) {        if (contents.charAt(i) > 0xFF) {        return "UTF-8";        }    }    return null;    }}

Thanks for your answers guys... In the meantime I found solution so here is what I used: http://www.onbarcode.com/products/android_barcode/barcodes/ean13.htmlIt's a library that worked fine for me so if anyone has the same issue I suggest using it.

Thanks again!

public Bitmap Ean13_Encode(String qrData,  int qrCodeDimention) {    Bitmap bitmap= Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888);           QRCodeEncoder qrCodeEncoder = new QRCodeEncoder(qrData, null,    Contents.Type.TEXT, BarcodeFormat.EAN_13.toString(), qrCodeDimention);    try {        bitmap = qrCodeEncoder.encodeAsBitmap();    } catch (WriterException e) {        e.printStackTrace();    };    return bitmap;};public final class QRCodeEncoder {private static final int WHITE = 0xFFFFFFFF;private static final int BLACK = 0xFF000000;private int dimension = Integer.MIN_VALUE;private String contents = null;private String displayContents = null;private String title = null;private BarcodeFormat format = null;private boolean encoded = false;public QRCodeEncoder(String data, Bundle bundle, String type, String format, int dimension) {    this.dimension = dimension;    encoded = encodeContents(data, bundle, type, format);}public String getContents() {    return contents;}public String getDisplayContents() {    return displayContents;}public String getTitle() {    return title;}private boolean encodeContents(String data, Bundle bundle, String type, String formatString) {    // Default to QR_CODE if no format given.    format = null;    if (formatString != null) {        try {            format = BarcodeFormat.valueOf(formatString);        } catch (IllegalArgumentException iae) {            // Ignore it then        }    }    if (format == null || format == BarcodeFormat.QR_CODE) {        this.format = BarcodeFormat.QR_CODE;        encodeQRCodeContents(data, bundle, type);    } else if (data != null && data.length() > 0) {        contents = data;        displayContents = data;        title = "Text";    }    return contents != null && contents.length() > 0;}private void encodeQRCodeContents(String data, Bundle bundle, String type) {    if (type.equals(Contents.Type.TEXT)) {        if (data != null && data.length() > 0) {            contents = data;            displayContents = data;            title = "Text";        }    } else if (type.equals(Contents.Type.EMAIL)) {        data = trim(data);        if (data != null) {            contents = "mailto:" + data;            displayContents = data;            title = "E-Mail";        }    } else if (type.equals(Contents.Type.PHONE)) {        data = trim(data);        if (data != null) {            contents = "tel:" + data;            displayContents = PhoneNumberUtils.formatNumber(data);            title = "Phone";        }    } else if (type.equals(Contents.Type.SMS)) {        data = trim(data);        if (data != null) {            contents = "sms:" + data;            displayContents = PhoneNumberUtils.formatNumber(data);            title = "SMS";        }    } else if (type.equals(Contents.Type.CONTACT)) {        if (bundle != null) {            StringBuilder newContents = new StringBuilder(100);            StringBuilder newDisplayContents = new StringBuilder(100);            newContents.append("MECARD:");            String name = trim(bundle.getString(ContactsContract.Intents.Insert.NAME));            if (name != null) {                newContents.append("N:").append(escapeMECARD(name)).append(';');                newDisplayContents.append(name);            }            String address = trim(bundle.getString(ContactsContract.Intents.Insert.POSTAL));            if (address != null) {                newContents.append("ADR:").append(escapeMECARD(address)).append(';');                newDisplayContents.append('\n').append(address);            }            Collection<String> uniquePhones = new HashSet<String>(Contents.PHONE_KEYS.length);            for (int x = 0; x < Contents.PHONE_KEYS.length; x++) {                String phone = trim(bundle.getString(Contents.PHONE_KEYS[x]));                if (phone != null) {                    uniquePhones.add(phone);                }            }            for (String phone : uniquePhones) {                newContents.append("TEL:").append(escapeMECARD(phone)).append(';');                newDisplayContents.append('\n').append(PhoneNumberUtils.formatNumber(phone));            }            Collection<String> uniqueEmails = new HashSet<String>(Contents.EMAIL_KEYS.length);            for (int x = 0; x < Contents.EMAIL_KEYS.length; x++) {                String email = trim(bundle.getString(Contents.EMAIL_KEYS[x]));                if (email != null) {                    uniqueEmails.add(email);                }            }            for (String email : uniqueEmails) {                newContents.append("EMAIL:").append(escapeMECARD(email)).append(';');                newDisplayContents.append('\n').append(email);            }            String url = trim(bundle.getString(Contents.URL_KEY));            if (url != null) {                // escapeMECARD(url) -> wrong escape e.g. http\://zxing.google.com                newContents.append("URL:").append(url).append(';');                newDisplayContents.append('\n').append(url);            }            String note = trim(bundle.getString(Contents.NOTE_KEY));            if (note != null) {                newContents.append("NOTE:").append(escapeMECARD(note)).append(';');                newDisplayContents.append('\n').append(note);            }            // Make sure we've encoded at least one field.            if (newDisplayContents.length() > 0) {                newContents.append(';');                contents = newContents.toString();                displayContents = newDisplayContents.toString();                title = "Contact";            } else {                contents = null;                displayContents = null;            }        }    } else if (type.equals(Contents.Type.LOCATION)) {        if (bundle != null) {            // These must use Bundle.getFloat(), not getDouble(), it's part of the API.            float latitude = bundle.getFloat("LAT", Float.MAX_VALUE);            float longitude = bundle.getFloat("LONG", Float.MAX_VALUE);            if (latitude != Float.MAX_VALUE && longitude != Float.MAX_VALUE) {                contents = "geo:" + latitude + ',' + longitude;                displayContents = latitude + "," + longitude;                title = "Location";            }        }    }}public Bitmap encodeAsBitmap() throws WriterException {    if (!encoded) return null;    Map<EncodeHintType, Object> hints = null;    String encoding = guessAppropriateEncoding(contents);    if (encoding != null) {        hints = new EnumMap<EncodeHintType, Object>(EncodeHintType.class);        hints.put(EncodeHintType.CHARACTER_SET, encoding);    }    MultiFormatWriter writer = new MultiFormatWriter();    BitMatrix result = writer.encode(contents, format, dimension, dimension, hints);    int width = result.getWidth();    int height = result.getHeight();    int[] pixels = new int[width * height];    // All are 0, or black, by default    for (int y = 0; y < height; y++) {        int offset = y * width;        for (int x = 0; x < width; x++) {            pixels[offset + x] = result.get(x, y) ? BLACK : WHITE;        }    }    Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);    bitmap.setPixels(pixels, 0, width, 0, 0, width, height);    return bitmap;}private String guessAppropriateEncoding(CharSequence contents) {    // Very crude at the moment    for (int i = 0; i < contents.length(); i++) {        if (contents.charAt(i) > 0xFF) { return "UTF-8"; }    }    return null;}private  String trim(String s) {    if (s == null) { return null; }    String result = s.trim();    return result.length() == 0 ? null : result;}private String escapeMECARD(String input) {    if (input == null || (input.indexOf(':') < 0 && input.indexOf(';') < 0)) { return input; }    int length = input.length();    StringBuilder result = new StringBuilder(length);    for (int i = 0; i < length; i++) {        char c = input.charAt(i);        if (c == ':' || c == ';') {            result.append('\\');        }        result.append(c);    }    return result.toString();}

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