一个JAVA开源的识别库,可以对常用的二维码,身份证,银行卡等识别

Scanner识别库,识别器可选择,这里有你常用的二维码/条码识别,还有你可能用到的身份证、银行卡识别,如果没有你想要的,可以自定义识别器 。
该库只识别扫描框内的图像,识别速率上大大提高,而且这个库比起其它的库就是解决了摄像头预览变形,预览页面高度自定义,你可以像常规一样整个页面都是预览,或者你可以选择在任何位置定义任何尺寸的预览,扫描框也高度自定义,你可以像常规一样居中,或者你也可以在预览的任何位置定义任何尺寸的扫描框(实际识别的扫描框和画上去的扫描框不一定是一样的,由你自己决定) 。
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一个JAVA开源的识别库,可以对常用的二维码,身份证,银行卡等识别

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一个JAVA开源的识别库,可以对常用的二维码,身份证,银行卡等识别

文章插图
 

一个JAVA开源的识别库,可以对常用的二维码,身份证,银行卡等识别

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依赖implementation 'com.shouzhong:Scanner:1.0.1'以下选择自己需要的
// zxingimplementation 'com.google.zxing:core:3.3.3'// zbarimplementation 'com.shouzhong:ScannerZBarLib:1.0.0'// 银行卡识别implementation 'com.shouzhong:ScannerBankCardLib:1.0.0'// 身份证识别implementation 'com.shouzhong:ScannerIdCardLib:1.0.1'代码基本使用
<RelativeLayout xmlns:Android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <com.shouzhong.scanner.ScannerView android:id="@+id/sv" android:layout_width="match_parent" android:layout_height="1080px" android:background="#000000"/></RelativeLayout>@Overrideprotected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_scanner); scannerView = findViewById(R.id.sv); scannerView.setViewFinder(new ViewFinder(this)); scannerView.setSaveBmp(true); scannerView.setEnableZXing(true); scannerView.setEnableZBar(true); scannerView.setEnableBankCard(true); scannerView.setEnableIdCard(true); scannerView.setCallback(new Callback() { @Override public void result(Result result) { tvResult.setText("识别结果:n" + result.toString()); scannerView.restartPreviewAfterDelay(2000); } });}@Overrideprotected void onResume() { super.onResume(); scannerView.onResume();}@Overrideprotected void onPause() { super.onPause(); scannerView.onPause();}开启或者关闭某个识别器
// 启用zxing识别器scannerView.setEnableZXing(true);// 启用zbar识别器scannerView.setEnableZBar(true);// 启用银行卡识别器scannerView.setEnableBankCard(true);// 启用身份证识别器(这里只支持2代身份证)scannerView.setEnableIdCard(true);如果你想自定义识别器
scannerView.setScanner(new IScanner() { /** * 这里实现自己的识别器,并把识别结果返回 * * @param data 矩形框内nv21图像数据 * @param width 图像宽度 * @param height 图像高度 * @return * @throws Exception */ @Override public Result scan(byte[] data, int width, int height) throws Exception { // 如果你想转为Bitmap,请使用NV21.nv21ToBitmap(byte[] nv21, int width, int height) return null; }});这里没给默认的预览页面,需要自己自定义,下面给个例子
class ViewFinder extends View implements IViewFinder { private Rect framingRect;//扫码框所占区域 private float widthRatio = 0.8f;//扫码框宽度占view总宽度的比例 private float heightWidthRatio = 1f;//扫码框的高宽比 private int leftOffset = -1;//扫码框相对于左边的偏移量,若为负值,则扫码框会水平居中 private int topOffset = -1;//扫码框相对于顶部的偏移量,若为负值,则扫码框会竖直居中 private int laserColor = 0xff008577;// 扫描线颜色 private int maskColor = 0x60000000;// 阴影颜色 private int borderColor = 0xff008577;// 边框颜色 private int borderStrokeWidth = 12;// 边框宽度 private int borderLineLength = 72;// 边框长度 private Paint laserPaint;// 扫描线 private Paint maskPaint;// 阴影遮盖画笔 private Paint borderPaint;// 边框画笔 private int position; public ViewFinder(Context context) { super(context); setWillNotDraw(false);//需要进行绘制 laserPaint = new Paint(); laserPaint.setColor(laserColor); laserPaint.setStyle(Paint.Style.FILL); maskPaint = new Paint(); maskPaint.setColor(maskColor); borderPaint = new Paint(); borderPaint.setColor(borderColor); borderPaint.setStyle(Paint.Style.STROKE); borderPaint.setStrokeWidth(borderStrokeWidth); borderPaint.setAntiAlias(true); } @Override protected void onSizeChanged(int xNew, int yNew, int xOld, int yOld) { updateFramingRect(); } @Override public void onDraw(Canvas canvas) { if (getFramingRect() == null) { return; } drawViewFinderMask(canvas); drawViewFinderBorder(canvas); drawLaser(canvas); } private void drawLaser(Canvas canvas) { Rect framingRect = getFramingRect(); int top = framingRect.top + 10 + position; canvas.drawRect(framingRect.left + 10, top, framingRect.right - 10, top + 5, laserPaint); position = framingRect.bottom - framingRect.top - 25 < position ? 0 : position + 2; //区域刷新 postInvalidateDelayed(20, framingRect.left + 10, framingRect.top + 10, framingRect.right - 10, framingRect.bottom - 10); } /** * 绘制扫码框四周的阴影遮罩 */ private void drawViewFinderMask(Canvas canvas) { int width = canvas.getWidth(); int height = canvas.getHeight(); Rect framingRect = getFramingRect(); canvas.drawRect(0, 0, width, framingRect.top, maskPaint);//扫码框顶部阴影 canvas.drawRect(0, framingRect.top, framingRect.left, framingRect.bottom, maskPaint);//扫码框左边阴影 canvas.drawRect(framingRect.right, framingRect.top, width, framingRect.bottom, maskPaint);//扫码框右边阴影 canvas.drawRect(0, framingRect.bottom, width, height, maskPaint);//扫码框底部阴影 } /** * 绘制扫码框的边框 */ private void drawViewFinderBorder(Canvas canvas) { Rect framingRect = getFramingRect(); // Top-left corner Path path = new Path(); path.moveTo(framingRect.left, framingRect.top + borderLineLength); path.lineTo(framingRect.left, framingRect.top); path.lineTo(framingRect.left + borderLineLength, framingRect.top); canvas.drawPath(path, borderPaint); // Top-right corner path.moveTo(framingRect.right, framingRect.top + borderLineLength); path.lineTo(framingRect.right, framingRect.top); path.lineTo(framingRect.right - borderLineLength, framingRect.top); canvas.drawPath(path, borderPaint); // Bottom-right corner path.moveTo(framingRect.right, framingRect.bottom - borderLineLength); path.lineTo(framingRect.right, framingRect.bottom); path.lineTo(framingRect.right - borderLineLength, framingRect.bottom); canvas.drawPath(path, borderPaint); // Bottom-left corner path.moveTo(framingRect.left, framingRect.bottom - borderLineLength); path.lineTo(framingRect.left, framingRect.bottom); path.lineTo(framingRect.left + borderLineLength, framingRect.bottom); canvas.drawPath(path, borderPaint); } /** * 设置framingRect的值(扫码框所占的区域) */ private synchronized void updateFramingRect() { Point viewSize = new Point(getWidth(), getHeight()); int width, height; width = (int) (getWidth() * widthRatio); height = (int) (heightWidthRatio * width); int left, top; if (leftOffset < 0) { left = (viewSize.x - width) / 2;//水平居中 } else { left = leftOffset; } if (topOffset < 0) { top = (viewSize.y - height) / 2;//竖直居中 } else { top = topOffset; } framingRect = new Rect(left, top, left + width, top + height); } @Override public Rect getFramingRect() { return framingRect; }}


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