PicassoTargetUtils.java 文件源码

private void createTarget() {
  target = new Target() {
    @Override
    public void onBitmapLoaded(Bitmap bitmap, LoadedFrom from) {
      materialProgressBar.setVisibility(View.INVISIBLE);
      imageView.setScaleType(ScaleType.CENTER_CROP);
      imageView.setColor(Color.TRANSPARENT);
      imageView.setImageBitmap(bitmap);
      imageView.invalidate();
      if (callBack != null) {
        callBack.onBitmapLoaded();
      }
    }

    @Override
    public void onBitmapFailed(Drawable errorDrawable) {
      materialProgressBar.setVisibility(View.INVISIBLE);
      imageView.setScaleType(ScaleType.CENTER_INSIDE);
      imageView.setImageDrawable(errorDrawable);
      if (callBack != null) {
        callBack.onBitmapFailed();
      }
    }

    @Override
    public void onPrepareLoad(Drawable placeHolderDrawable) {
      if (callBack != null) {
        callBack.onPrepareLoad();
      }
    }
  };
}