Glide 4 - 特定调用的 ResourceDecoder

问题描述

在浏览了所有 Glide 文档和 StackOverflow 问答后，我找不到任何关于在版本 4 中为单个 Glide 调用应用资源解码器的信息.

After going through all Glide documentation and StackOverflow questions and answers, I cannot find any information regarding applying resource decoder for a single Glide call in version 4.

在 Glide 3 版本中，我们可以这样做:

In version Glide 3, we can do this:

Glide.with(imagePreview.context)
          .load(mediaItem.path)
          .asBitmap()
          .decoder(decoderWithDownSampleAtMost(imagePreview.context))
          .diskCacheStrategy(DiskCacheStrategy.NONE)
          .skipMemoryCache(false)
          .dontAnimate()
          .into(target)

private fun decoderWithDownSampleAtMost(ctx: Context): GifBitmapWrapperResourceDecoder {
    return GifBitmapWrapperResourceDecoder(
        ImageVideoBitmapDecoder(StreamBitmapDecoder(Downsampler.AT_MOST,
            Glide.get(ctx).bitmapPool,
            DecodeFormat.DEFAULT),
            FileDescriptorBitmapDecoder(ctx)),
        GifResourceDecoder(ctx),
        Glide.get(ctx).bitmapPool)
  }

在第 4 版中，我知道我们可以使用 AppGlideModule 来自定义 ResourceDecoder

And in version 4, I know we can use AppGlideModule for custom ResourceDecoder

@GlideModule
class MyAppGlideModule : AppGlideModule() {
    override fun registerComponents(context: Context, glide: Glide, registry: Registry) {
        registry.prepend(String::class.java, Bitmap::class.java, GalleryDecoder(context))
    }
}

然而，这适用于所有 Glide 调用.我怎样才能让 ResourceDecoder 表现得像 v3:能够应用于单个调用?

However, this applies to all Glide calls. How can I make ResourceDecoder behave like v3: the ability to apply on individual call?

更新:在咨询 Glide Github Issues 此处 https://github.com/bumptech/glide/issues/3522

所以基本上，我需要创建一个自定义的 Option 并使用它来确定是否会触发我的自定义 ResourceDecoder.这是我的示例:

So basically, I need to create a custom Option and use it to determine whether my custom ResourceDecoder will be triggered. Here is my sample:

• 普通AppGlideModule

@GlideModule
class MyAppGlideModule : AppGlideModule() {
    override fun registerComponents(context: Context, glide: Glide, registry: Registry) {
        registry.prepend(Any::class.java, Bitmap::class.java, MainActivity.GalleryDecoder(context, glide.bitmapPool))
    }
}

• 在我的Activity中:

class MainActivity : AppCompatActivity() {

    companion object {
        val GALLERY_DECODER: Option<Boolean> = Option.memory("abc")
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        GlideApp.with(this)
            .asBitmap()
            .load("link_or_path_here")
            .apply(option(GALLERY_DECODER, true))
            .into(image_view)

    }
}

• 我的GalleryDecoder:

open class GalleryDecoder(
        private val context: Context,
        private val bitmapPool: BitmapPool
    ) : ResourceDecoder<Any, Bitmap> {

        override fun decode(source: Any, width: Int, height: Int, options: Options): Resource<Bitmap>? {
            return BitmapResource.obtain(BitmapFactory.decodeResource(context.resources, R.drawable.giphy), bitmapPool)
        }

        override fun handles(source: Any, options: Options): Boolean = options.get(GALLERY_DECODER) ?: false

    }

就是这样，如果您不想使用 GalleryDecoder，只需从 Glide 加载中删除 .apply(option(GALLERY_DECODER, true)).干杯！

That's it, if you don't want to use GalleryDecoder, just remove .apply(option(GALLERY_DECODER, true)) from Glide load. Cheers!

推荐答案

我认为你可以这样做:

GlideApp.with(mContext)
        // TRY With below line....
        .setDefaultRequestOptions(new GlideOptions().decode(Class<T> class))
        .load(R.drawable.ic_loader)
        .into(imageView);

我认为你必须传递你的类对象.我还没有尝试过，但我认为它会起作用.

I think you have to pass your class object. I haven't tried but I think it will work.

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