1、支持条形码下方显示Code。

2、优化扫条形码。
3、优化相机预览尺寸遍历策略、从而降低变形的可能性。

lib/src/main/java/com/king/zxing/camera/CameraManager.java

@@ -271,6 +271,12 @@ public final class CameraManager {
 //            rect.right = rect.right * cameraResolution.x / screenResolution.x;
 //            rect.top = rect.top * cameraResolution.y / screenResolution.y;
 //            rect.bottom = rect.bottom * cameraResolution.y / screenResolution.y;
+
+            rect.left = rect.left * cameraResolution.y / screenResolution.x;
+            rect.right = rect.right * cameraResolution.y / screenResolution.x;
+            rect.top = rect.top * cameraResolution.x / screenResolution.y;
+            rect.bottom = rect.bottom * cameraResolution.x / screenResolution.y;
+
             framingRectInPreview = rect;
         }
         return framingRectInPreview;