android zxing二维码扫描界面参数修改

  二维码扫描界面的参数配置,找到包mining,app.zxing内camera包

  1.修改扫描界面相框相关

  打开CameraManager,设置扫描相框最大值

  private static final int MIN_FRAME_WIDTH = 480;//240    设置相框宽度最小值
  private static final int MIN_FRAME_HEIGHT = 480;//240   设置相框高度最小值
  private static final int MAX_FRAME_WIDTH = 800;//480     设置相框宽度最大值
  private static final int MAX_FRAME_HEIGHT = 800;//480    设置相框宽度最大值

  设置相框占屏幕宽度比

  int width = screenResolution.x * 4 / 5;//设置相框占屏幕宽度比

  int height = screenResolution.y * 2 / 4;//设置相框占屏幕高度比

  int leftOffset = (screenResolution.x - width) / 2;//设置相框距离屏幕左边的距离
  int topOffset = (screenResolution.y - height) / 3;//设置相框距离屏幕高度的距离

  2.修改扫描界面显示文字

   canvas.drawText(getResources().getString(R.string.scan_text), (float)(frame.left+(float)TEXT_PADDING_LEF  T *density), (float) (frame.bottom + (float)TEXT_PADDING_TOP *density), paint);

   此方法第一个参数是设置扫描界面文字内容,第二个参数是设置文字距离左边距离,第三个参数是设置文字距离顶部的  距离,第四个参数为画笔.

     找到CameraConfigurationManager类,找到方法initFromCameraParameters 

     将下面代码复制替换原来代码

void initFromCameraParameters(Camera camera) {
  Camera.Parameters parameters = camera.getParameters();
  previewFormat = parameters.getPreviewFormat();
  previewFormatString = parameters.get("preview-format");
  Log.d(TAG, "Default preview format: " + previewFormat + '/' + previewFormatString);
  WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
  Display display = manager.getDefaultDisplay();
  screenResolution = new Point(display.getWidth(), display.getHeight());
  Log.d(TAG, "Screen resolution: " + screenResolution);
  Point screenResolutionForCamera = new Point();
  screenResolutionForCamera.x = screenResolution.x;
  screenResolutionForCamera.y = screenResolution.y;
  // preview size is always something like 480*320, other 320*480
  if (screenResolution.x < screenResolution.y) {
    screenResolutionForCamera.x = screenResolution.y;
    screenResolutionForCamera.y = screenResolution.x;
  }
  cameraResolution = getCameraResolution(parameters, screenResolutionForCamera);
  Log.d(TAG, "Camera resolution: " + screenResolution);
}

   此处添加了

  Point screenResolutionForCamera = new Point();
  screenResolutionForCamera.x = screenResolution.x;
  screenResolutionForCamera.y = screenResolution.y;
  // preview size is always something like 480*320, other 320*480
  if (screenResolution.x < screenResolution.y) {
    screenResolutionForCamera.x = screenResolution.y;
    screenResolutionForCamera.y = screenResolution.x;
  }

   修改了cameraResolution=getCameraResolution(parameters,screenResolutionForCamera);