本文介绍了如何使用新的Google Vision API生成条码并将其转换为位图？的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
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 [email protected];
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 int offset = y * width;
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 = "[email protected]";
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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