Lottie动画资源放到服务器预下载，2024最新版

2024-05-11 服务器 0

return
}
//资源打包成zip文件放到了服务器上，所以下载下来要解压缩
LottieAnimationUtils.unZip(download.file, parentPath)
downloadCount(true)
}

override fun onError(download: Download, error: Error, throwable: Throwable?) {
if (download.group != groupId) {
return
}
downloadCount(false)
}

private val downloadCount: (Boolean) -> Unit = {
downloaded++
if (downloaded == num) {
callback?.invoke(it)
fetch.removeListener(this)
}
}
}

fun downloadList(pathList: List, priority: Priority = Priority.NORMAL, callback: ((Boolean) -> Unit)? = null) {
val groupId = Random.nextInt()
pathList.filter {
//本地文件不存在的才下载
!File(parentPath + File.separator + it).exists()
}.flatMap { path ->
arrayListOf(Request(“ ${FileDownloadConstant.BaseConfig.GIFT_PATH}/$ path” + “.zip”, parentPath + “/” + path + “.zip”).also {
it.groupId = groupId
it.priority = priority
})
}.apply {
if (size == 0) {
callback?.invoke(true)
return@apply
}
fetch.addListener(DownloadListener(groupId, size, callback)).enqueue(this)
}
}

/**

下载单个文件
*/
fun download(path: String, callback: ((Boolean) -> Unit)? = null) {
if (File(“ $p a re n tP a t h /$ path” + “.zip”).exists()) {
callback?.invoke(true)
return
}
val groupId = Random.nextInt()
fetch.addListener(DownloadListener(groupId, 1, callback)).enqueue(Request(“ ${FileDownloadConstant.BaseConfig.GIFT_PATH}/$ path” + “.zip”, “ $p a re n tP a t h /$ path.zip”).also { it.groupId = groupId })
}
}

下载框架使用的是一个开源的，名字叫Fetch

在启动页的onCreate方法中，调用：

FileDownloadUtil.INSTANCE.downloadList(FileDownloadConstant.INSTANCE.getGiftList(), Priority.NORMAL,null);

就开始下载资源了

那么怎么使用Lottie框架加载文件夹中的动画资源呢？直接上代码

object LottieAnimationUtils {
//lottie加载本地资源的核心方法
fun loadLottie(lottieAnimationView: LottieAnimationView,imagePath:String,dataPath : String,giftName:String):FileInputStream?{
lottieAnimationView.setCacheComposition(false)
val imageFiles = File(imagePath)
val jsonFile = File(dataPath)
var fis:FileInputStream? = null
//资源中只有json文件的时候走这里
if (!imageFiles.exists()) {
if (jsonFile.exists()) {
fis = FileInputStream(jsonFile)
try {
lottieAnimationView.setImageAssetDelegate(null)
}catch (e : Exception) {

}
LottieComposition.Factory.fromInputStream(fis) {
lottieAnimationView.postDelayed(Runnable {
lottieAnimationView.visibility = View.VISIBLE
},200)
it?.let {
it1 -> lottieAnimationView.setComposition(it1)
}
lottieAnimationView.playAnimation()
}
}else {
FileDownloadUtil.download(giftName)
}
return fis
}
//资源中有imges和json的走这里
try {
fis = FileInputStream(jsonFile)
val absolutePath = imageFiles.absolutePath
lottieAnimationView.setImageAssetDelegate() {
val opts = BitmapFactory.Options()
opts.inScaled = true