How to use

requestLayout

method

in

android.view.SurfaceView

  @SuppressWarnings("SuspiciousNameCombination")
  @Override
  public void onCameraSizeSelected(int width, int height, Frame.ROTATE rotate) {
    if (rotate == Frame.ROTATE.BY_90_CCW || rotate == Frame.ROTATE.BY_90_CW) {
      previewWidth = height;
      previewHeight = width;
    } else {
      previewHeight = height;
      previewWidth = width;
    }
    cameraPreview.requestLayout();
  }
}

/**
 * Update the camera width and height variables, then request a resize of the SurfaceView.
 * Notice that CameraHelper notifies us of the physical, pre-rotation width and height of the camera
 * frames, so we need to account for possible rotation in this method.
 */
@Override
public void onFrameSizeSelected(int width, int height, Frame.ROTATE rotation) {
  if (rotation == Frame.ROTATE.BY_90_CW || rotation == Frame.ROTATE.BY_90_CCW) {
    previewHeight = width;
    previewWidth = height;
  } else {
    previewWidth = width;
    previewHeight = height;
  }
  surfaceView.requestLayout();
}