zxing全屏识别（v2.5.0崩溃问题记录）

自己遇到的问题:/**

   * Like {@link #getFramingRect} but coordinates are in terms of the preview frame,
   * not UI / screen.
   */
  public Rect getFramingRectInPreview() {
    if (framingRectInPreview == null) {
      Rect rect = new Rect(getFramingRect());
      Point cameraResolution = configManager.getCameraResolution();
      Point screenResolution = configManager.getScreenResolution();
      // rect.left = rect.left * cameraResolution.x / screenResolution.x;
      // 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;*/
      /***lyl  TODO 修改识别区域为全屏***/
　　　　//自己傻乎乎的把这里的参数改了以后，在自己跟部分手机上运行，识别，都可以实现全屏识别。但是没想到发版本后，好多手机都出现了崩溃问题。
　　　　
      rect.left = 0;
      rect.right =screenResolution.x;
      rect.top = 0;
      rect.bottom =screenResolution.y;
      framingRectInPreview = rect;
    }
    return framingRectInPreview;
  }

出错的位置是：

  /**
   * A factory method to build the appropriate LuminanceSource object based on the format
   * of the preview buffers, as described by Camera.Parameters.
   *
   * @param data A preview frame.
   * @param width The width of the image.
   * @param height The height of the image.
   * @return A PlanarYUVLuminanceSource instance.
   */
  public PlanarYUVLuminanceSource buildLuminanceSource(byte[] data, int width, int height) {
    Rect rect = getFramingRectInPreview();
    int previewFormat = configManager.getPreviewFormat();
    String previewFormatString = configManager.getPreviewFormatString();
    switch (previewFormat) {
      // This is the standard Android format which all devices are REQUIRED to support.
      // In theory, it's the only one we should ever care about.
      case PixelFormat.YCbCr_420_SP:
        // This format has never been seen in the wild, but is compatible as we only care
        // about the Y channel, so allow it.
      case PixelFormat.YCbCr_422_SP:
        return new PlanarYUVLuminanceSource(data, width, height, rect.left, rect.top,
                rect.width(), rect.height());
      default:
        // The Samsung Moment incorrectly uses this variant instead of the 'sp' version.
        // Fortunately, it too has all the Y data up front, so we can read it.
        if ("yuv420p".equals(previewFormatString)) {
          return new PlanarYUVLuminanceSource(data, width, height, rect.left, rect.top,
                  rect.width(), rect.height());
        }
    }
    throw new IllegalArgumentException("Unsupported picture format: " +
            previewFormat + '/' + previewFormatString);
  }

 public PlanarYUVLuminanceSource(byte[] yuvData, int dataWidth, int dataHeight, int left, int top,
      int width, int height) {
    super(width, height);
　　//报错的是这里。
    if (left + width > dataWidth || top + height > dataHeight) {
      throw new IllegalArgumentException("Crop rectangle does not fit within image data.");
    }

    this.yuvData = yuvData;
    this.dataWidth = dataWidth;
    this.dataHeight = dataHeight;
    this.left = left;
    this.top = top;
  }

 

 

 

原文链接：https://blog.csdn.net/yu_duan_hun/article/details/79388195

 

1.删除bundle传bitmap的部分直接改为全屏识别

---

（1）全屏扫样式更改 
CameraManager.java 
需要更改buildLuminanceSource()方法：

 public PlanarYUVLuminanceSource buildLuminanceSource(byte[] data, int width, int height) {
    return new PlanarYUVLuminanceSource(data, width, height, 0, 0,
            width, height);
            }

ViewfinderView.java 
需要更改onDraw():

public void onDraw(Canvas canvas) {
    postInvalidateDelayed(ANIMATION_DELAY, 0, 0,
                getWidth(), getHeight());
}

（2）去掉传递图片（一般只需要扫码的条码号或者网址，扫码图片本身我们不关心，如果需要这部分需要对这个图片进行压缩处理，不然会出错）

MipActivityCapture.java 
这里需要删掉handleDecode里面的bundle.putParcelable("bitmap", barcode);，barcode这个参数也可以不用传递了。 
相应的在CaptureActivityHandler.java的handleMessage中只需要传递msg.obj，下面这句可以删掉：

 Bitmap barcode = bundle == null ? null :
            (Bitmap) bundle.getParcelable(DecodeThread.BARCODE_BITMAP);

然后把DecodeHandler.java的decode()方法也改一下： 

删掉下面的部分

  Bundle bundle = new Bundle();
      bundle.putParcelable(DecodeThread.BARCODE_BITMAP, source.renderCroppedGreyscaleBitmap());
      message.setData(bundle);