将 GIF 下载为文件并获取内容 URI

Question

我需要把GIF放到输入连接https://developer.android.com/guide/topics/text/image-keyboard.html

但是我有一个问题，因为我需要获取这个 GIF 的 uri。我像文件一样下载它，并且只能获取它的路径。以及如何获取 URI？或者我需要以其他方式执行此操作？

Glide.with(this)
            .asFile()
            .load(contentURL)
            .downloadOnly(object: SimpleTarget<File>(){
                override fun onResourceReady(resource: File, transition: Transition<in File>?) {}

Answer 1

更新（已测试）

选项 1：使用Glide

private suspend fun downloadImage(context: Context, imageUrl: String, fileName: String, folderName: String) {
    withContext(Dispatchers.IO) {
        val gifBuffer = Glide.with(context).asGif().load(imageUrl).submit().get().buffer

        val imageUri = getImageUri(getApplication(), fileName, folderName)

        context.contentResolver.openOutputStream(imageUri).use {
            val bytes = ByteArray(gifBuffer.capacity())

            (gifBuffer.clear() as ByteBuffer).get(bytes)    //Both ".clear()" and "as ByteBuffer" are mandatory!!

            it?.write(bytes)
        }
    }
}

选项 2：使用URL(url).openStream()

private suspend fun downloadImage(context: Context, imageUrl: String, fileName: String, folderName: String) {
    withContext(Dispatchers.IO) {
        val imageUri = getImageUri(getApplication(), fileName, folderName)

        URL(imageUrl).openStream().use { inputStream ->
            context.contentResolver.openOutputStream(imageUri).use { outputStream ->
                inputStream.copyTo(outputStream!!)
            }
        }
    }
}

---

我认为你应该使用DownloadManager来实现它，它有setDestinationUri()。

• 有用的视频： https://youtu.be/SmXGlv7QEO0?t=642

• 有用的阅读： https://medium.com/@aungkyawmyint_26195/downloading-file-properly-in-android-d8cc28d25aca

记得先生成图片文件uri：

private fun getNewImageUri(fileName: String, folderName: String): Uri { //create new file
    val values = ContentValues().apply {
        put(MediaStore.MediaColumns.DISPLAY_NAME, fileName)             //file name
        put(MediaStore.MediaColumns.MIME_TYPE, "image/gif")             //file type
        put(MediaStore.MediaColumns.RELATIVE_PATH, "${Environment.DIRECTORY_DOWNLOAD}/$folderName")     //file location
    }

    return requireContext().contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)!!
}