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Preload

Translations: 简体中文

Sometimes in order to improve the loading speed and prevent users from seeing the image loading process, it is necessary to load the image into memory in advance.

We just need not to set Target, and then ensure that the size, precision, and scale parameters are the same as when used, as follows:

val request = ImageRequest(context, "https://example.com/image.jpg") {
    size(200, 200)
    precision(Precision.LESS_PIXELS)
    scale(Scale.CENTER_CROP)
}

sketch.enqueue(request)
// or
scope.launch {
    sketch.execute(request)
}

Tip

When building ImageRequest, you need to actively set and use consistent size, precision, and scale, because if there is no active setting when using Size, precision and scale will be obtained from Target, which may cause inconsistencies in size, precision, and scale between preloading and use, resulting in failure to hit the cache.