注意，该项目不在维护，迁移到Scanner
用zbar实现的一个扫码库，有别于一般的扫码库，你可以定义任何位置任何尺寸的扫描框而不会导致摄像头预览变形。
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implementation 'com.shouzhong:ZBarScanner:1.0.2'
xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.shouzhong.zbar.ZBarScannerView
android:id="@+id/zbar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#000000"/>
</RelativeLayout>
java
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_scanner);
zBarScannerView = findViewById(R.id.zbar);
zBarScannerView.setViewFinder(new ViewFinder(this));
zBarScannerView.setCallback(new Callback() {
@Override
public void result(String s, String path) {
Log.e("==================", s);
// 在2秒后重新开启预览
zBarScannerView.restartPreviewAfterDelay(2000);
}
});
}
@Override
protected void onResume() {
super.onResume();
zBarScannerView.onResume();
}
@Override
protected void onPause() {
super.onPause();
zBarScannerView.onPause();
}
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 = 0.6f;//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;
}
}
ZBarScannerView
| 方法名 | 说明 |
|---|---|
| setViewFinder | 扫描区域 |
| setCallback | 扫码成功后的回调 |
| onResume | 开启扫描 |
| onPause | 停止扫描 |
| setFormats | 设置支持的码格式，具体看BarcodeFormat |
| restartPreviewAfterDelay | 设置多少毫秒后重启扫描 |
| setFlash | 开启/关闭闪光灯 |
| toggleFlash | 切换闪光灯的点亮状态 |
| isFlashOn | 闪光灯是否被点亮 |
| setShouldAdjustFocusArea | 设置是否要根据扫码框的位置去调整对焦区域的位置，部分手机不支持 |
| setSaveBmp | 设置是否保存条码图片 |
DecodeUtils
| 方法名 | 说明 |
|---|---|
| decode | 识别图片，建议在子线程运行 |
-dontwarn net.sourceforge.zbar.**
-keep class net.sourceforge.zbar.** {*;}