TextView使用Glide加载html图片

public class MyImageGetter implements Html.ImageGetter {

private URLDrawable urlDrawable = null;
private TextView textView;
private Context context;

public MyImageGetter(Context context, TextView textView) {
this.textView = textView;
this.context = context;
}

@Override
public Drawable getDrawable(final String source) {
urlDrawable = new URLDrawable();

Glide.with(context).load(source).asBitmap().fitCenter().into(new SimpleTarget<Bitmap>() {
@Override
public void onResourceReady(Bitmap resource, GlideAnimation<? super Bitmap> glideAnimation) {
urlDrawable.bitmap = resource;
Logger.getLogger().d("加载的图片，Width：" + resource.getWidth() + "，Height：" + resource.getHeight());
urlDrawable.setBounds(0, 0, resource.getWidth(), resource.getHeight());
textView.invalidate();
textView.setText(textView.getText());//不加这句显示不出来图片，原因不详
}
});
return urlDrawable;
}

public class URLDrawable extends BitmapDrawable {
public Bitmap bitmap;

@Override
public void draw(Canvas canvas) {
super.draw(canvas);
if (bitmap != null) {
canvas.drawBitmap(bitmap, 0, 0, getPaint());
}
}
}
}

tv_RichText.setText(Html.fromHtml(richText, new MyImageGetter(mContext, tv_RichText), null));