如何使用新的Google Vision API生成条码并将其转换为位图？ [英] How to generate an Barcode and convert it to Bitmap using new Google Vision API?
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问题描述
如何使用新的Google Vision API生成条形码并将其转换为位图？
Barcode barcode = new Barcode（） ;
Barcode.Email email = new Barcode.Email（）;
email.address =my_email@gmail.com;
email.subject =我的主题;
email.body =我的身体内容;
barcode.email =电子邮件;
//实现转换
位图barcodeImage = barcodeToBitmap（barcode）; //我知道这部分。
public static Bitmap getBitmap（String barcode，int barcodeType，int width，int height）
{
Bitmap barcodeBitmap = null;
BarcodeFormat barcodeFormat = convertToZXingFormat（barcodeType）;
try
{
barcodeBitmap = encodeAsBitmap（barcode，barcodeFormat，width，height）;
}
catch（WriterException e）
{
e.printStackTrace（）;
}
返回barcodeBitmap;
}
private static BarcodeFormat convertToZXingFormat（int form at）
{
switch（format）
{
case 8：
return BarcodeFormat.CODABAR;
案例1：
返回BarcodeFormat.CODE_128;
案例2：
返回BarcodeFormat.CODE_39;
案例4：
返回BarcodeFormat.CODE_93;
案例32：
返回BarcodeFormat.EAN_13;
情况64：
返回BarcodeFormat.EAN_8;
case 128：
返回BarcodeFormat.ITF;
情况512：
返回BarcodeFormat.UPC_A;
case 1024：
return BarcodeFormat.UPC_E;
//默认128？
默认值：
返回BarcodeFormat.CODE_128;
}
}
/ *************************** ***********************************
*从com.google.zxing.client获取。 android.encode.QRCodeEncoder
*
*请参阅下面的网站
* 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;
私有静态位图encodeAsBitmap（字符串内容，BarcodeFormat格式，int img_width，int img_height）抛出WriterException
{
if（contents == null）{
return null ;
}
映射< EncodeHintType，Object> hints = null;
字符串编码= guessAppropriateEncoding（contents）;
if（encoding！= null）{
hints = new EnumMap<>（EncodeHintType.class）;
hints.put（EncodeHintType.CHARACTER_SET，encoding）;
}
MultiFormatWriter writer = new MultiFormatWriter（）;
BitMatrix结果;
尝试{
result = writer.encode（contents，format，img_width，img_height，hints）;
} catch（IllegalArgumentException iae）{
//不支持的格式
return null;
}
int width = result.getWidth（）;
int height = result.getHeight（）;
int [] pixels = new int [width * height];
for（int y = 0; y
for（int x = 0; x< width; x ++）{
pixels [offset + x] = result.get（x，y）？黑，白;
}
}
位图位图= Bitmap.createBitmap（width，height，
Bitmap.Config.ARGB_8888）;
bitmap.setPixels（像素，0，宽度，0，0，宽度，高度）;
返回位图;
}
private static String guessAppropriateEncoding（CharSequence contents）{
//此时非常粗糙
for（int i = 0; i< contents.length （）; i ++）{
if（contents.charAt（i）> 0xFF）{
returnUTF-8;
}
}
返回null;
}
}
How to generate an Barcode and convert it to Bitmap using new Google Vision API?
Barcode barcode = new Barcode();
Barcode.Email email = new Barcode.Email();
email.address = "my_email@gmail.com";
email.subject = "My Subject;
email.body = "My body content.";
barcode.email = email;
//Implement conversion Bitmap barcodeImage = barcodeToBitmap(barcode);// I do know this part.
解决方案
You can detect your barcodes using Google Vision API and then use ZXing to generate the barcodes. You could try something like this, it uses zxing library:
public static Bitmap getBitmap(String barcode, int barcodeType, int width, int height)
{
Bitmap barcodeBitmap = null;
BarcodeFormat barcodeFormat = convertToZXingFormat(barcodeType);
try
{
barcodeBitmap = encodeAsBitmap(barcode, barcodeFormat, width, height);
}
catch (WriterException e)
{
e.printStackTrace();
}
return barcodeBitmap;
}
private static BarcodeFormat convertToZXingFormat(int format)
{
switch (format)
{
case 8:
return BarcodeFormat.CODABAR;
case 1:
return BarcodeFormat.CODE_128;
case 2:
return BarcodeFormat.CODE_39;
case 4:
return BarcodeFormat.CODE_93;
case 32:
return BarcodeFormat.EAN_13;
case 64:
return BarcodeFormat.EAN_8;
case 128:
return BarcodeFormat.ITF;
case 512:
return BarcodeFormat.UPC_A;
case 1024:
return BarcodeFormat.UPC_E;
//default 128?
default:
return BarcodeFormat.CODE_128;
}
}
/**************************************************************
* 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;
private static Bitmap encodeAsBitmap(String contents, BarcodeFormat format, int img_width, int img_height) throws WriterException
{
if (contents == null) {
return null;
}
Map<EncodeHintType, Object> hints = null;
String encoding = guessAppropriateEncoding(contents);
if (encoding != null) {
hints = new EnumMap<>(EncodeHintType.class);
hints.put(EncodeHintType.CHARACTER_SET, encoding);
}
MultiFormatWriter writer = new MultiFormatWriter();
BitMatrix result;
try {
result = writer.encode(contents, 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;
}
}
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