这里是一个完全可行的代码,用于在当前加载失败时加载另一个URL:
为了重复使用代码而创建的小扩展:
fun RequestBuilder<Drawable>.setListener(
onReady: () -> Boolean = { false },
onFailed: () -> Boolean,
): RequestBuilder<Drawable> {
return listener(object : RequestListener<Drawable> {
override fun onLoadFailed(
e: GlideException?,
model: Any?,
target: Target<Drawable>?,
isFirstResource: Boolean,
): Boolean = onFailed()
override fun onResourceReady(
resource: Drawable?,
model: Any?,
target: Target<Drawable>?,
dataSource: DataSource?,
isFirstResource: Boolean,
): Boolean = onReady()
})
}
ViewHolder 的代码示例:
private val avatarImage = view.findViewById<ImageView>(R.id.avatar_image)
private val glideHandler = Handler(Looper.getMainLooper())
fun bind(urlList: List<String>) {
if (urlList.isNotEmpty()) {
loadImage(urlList)
}
}
fun unbind() {
glideHandler.removeCallbacksAndMessages(null)
}
private fun loadImage(urlList: List<String>, index: Int = urlList.indices.first) {
val url = urlList.getOrNull(index) ?: return
Glide.with(avatarImage)
.load(url)
.placeholder(R.drawable.img_holder_load)
.error(R.drawable.img_holder_error)
.setListener {
val newIndex = index + 1
if (newIndex in urlList.indices) {
glideHandler.post { loadImage(urlList, newIndex) }
return@setListener true
}
return@setListener false
}
.into(avatarImage)
}