Glide加载图片占位图问题，CustomViewTarget加载图片占位图问题

Glide加载图片时通常会设置占位图。

1.Glide加载图片到imageview设置占位图

   val options = RequestOptions().placeholder(R.drawable.tlive_main_img_poster_default)//图片加载出来前，显示的图片.fallback( R.drawable.tlive_main_img_poster_default) //url为空的时候,显示的图片.error(R.drawable.tlive_main_img_poster_default);//图片加载失败后，显示的图片Glide.with(this).load("http://zp-o.img.leiniao.com/live/d75a11e7-d2d4-4880-83b3-c358423f1393x.png").apply(options).into(imageposter)

加载图片到imageview的直接使用RequestOptions即可

2.Glide以bitmap形式加载图片设置占位图

fun loadImageIntoBackground(view: View,context: Context,url: String,corner: Int,placeHolder: Int,width: Int,height: Int,imageLoaderDrawableListener: ImageLoaderDrawableListener) {val option: RequestOptions = RequestOptions().override(width, height).transform(RoundedCorners(corner)).placeholder(placeHolder).error(placeHolder).fallback(placeHolder)Glide.with(context).asBitmap().load(url).apply(option).into(object : CustomViewTarget<View, Bitmap>(view) {override fun onLoadFailed(errorDrawable: Drawable?) {LogUtils.d("ImageLoadUtils", "onLoadFailed${errorDrawable}")imageLoaderDrawableListener.onLoadFail(errorDrawable)}override fun onResourceReady(resource: Bitmap, transition: Transition<in Bitmap>?) {if (resource != null && !resource.isRecycled) {imageLoaderDrawableListener.onLoadImageSuccess(url,BitmapDrawable(context.resources, resource))}}override fun onResourceLoading(placeholder: Drawable?) {LogUtils.d("ImageLoadUtils", "onResourceLoading${placeholder}")super.onResourceLoading(placeholder)view.background = placeholder}override fun onResourceCleared(placeholder: Drawable?) {}})}