java - 图像不使用画布抗锯齿

Question

我正在尝试使用画布显示图像 .png 但由于某种原因我无法让它工作，图像没有抗锯齿。这使得它在曲线或对角线上全部像素化。

这是我正在使用的代码：

Pixmap button = g.newPixmap("button.png");


@Override
public Pixmap newPixmap(String fileName) {
  Config config = Config.ARGB_8888;

  Options options = new Options();
  options.inPreferredConfig = config;

  InputStream in = null;
  Bitmap bitmap = null;
  try {
    in = manager.open(fileName);
    bitmap = BitmapFactory.decodeStream(in, null, options);
    if (bitmap == null)
      throw new RuntimeException("Couldn't load bitmap from asset '" + fileName + "'");
  } catch (IOException e) {
    throw new RuntimeException("Couldn't load bitmap from asset '" + fileName + "'");
  } finally {
    if (in != null) {
      try {
        in.close();
      } catch (IOException e) {
      }
    }
  }

  return new Pixmap(bitmap);
}

g.drawPixmap(button);

@Override
public void drawPixmap(Pixmap pixmap) {
  srcRect = new Rect(0, 0, pixmap.getOriginalWidth(), pixmap.getOriginalHeight());
  dstRect = new Rect(pixmap.getX(), pixmap.getY(), pixmap.getX() + pixmap.getVirtualWidth(), pixmap.getY() + pixmap.getVirtualHeight());
  canvas.drawBitmap(pixmap.bitmap, srcRect, dstRect, paint); 
}   

我可能做错了什么？

Answer 1

尝试：

paint.setAntiAlias(true);
paint.setFilterBitmap(true);
paint.setDither(true);

或者：

Paint paint = new Paint(Paint.FILTER_BITMAP_FLAG);