在Android应用程序中生成条形码图像
我需要生成一维条码图像，并根据给定的13个字符的代码将其设置为ImageView。 任何人都可以帮助我吗？
您可以使用zxing库轻松生成条形码。
首先，在libs文件夹下findcore.jar。
libs/core.jar 你可以从这里下载ZXing-2.1.zip。
http://repo1.maven.org/maven2/com/google/zxing/ （ 来源 ）
解压缩文件后，findjar文件。
\ZXing-2.1\zxing-2.1\core\core.jar
然后写下你自己的代码。
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; } }
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 eg 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(); }
}
感谢您的答案家伙…在此期间，我find了解决scheme，所以这里是我用： http : //www.onbarcode.com/products/android_barcode/barcodes/ean13.html这是一个图书馆工作正常，所以如果任何人都有同样的问题，我build议使用它。
再次感谢！
看看答案： 在Android中生成一维条码
他们build议使用IText这是一个Java PDF操作库。 这也有能力生成条形码图像。
你可以find示例代码在这个问题，我链接，也在这里
