Android Glide4.0以上版本保存Gif文件方法

RequestListener<Drawable> 可以直接区别图片类型但保存文件比较繁琐
RequestListener<File> 可以直接保存文件但无法区别图片类型
以下代码已经实践 有更优的方式请留言
Kotlin代码完成：

private val PATH_CAMERA_IMAGE = "/hanzhi/myImage"
    public fun loadGlideImageByImageUrl(context: Context, url: String) {
        var isGif: Boolean
        GlideApp.with(context)
                // Actually it won't download another time if the file has been cached
                .load(url)
                .listener(object : RequestListener<Drawable> {
                    override fun onLoadFailed(e: GlideException?, model: Any?, target: Target<Drawable>?, isFirstResource: Boolean): Boolean {
                        return false
                    }

                override fun onResourceReady(resource: Drawable?, model: Any?, target: Target<Drawable>?, dataSource: DataSource?, isFirstResource: Boolean): Boolean {
                    isGif = resource is GifDrawable
                    downloadImage(context, url, isGif)
                    return false
                }

            }).submit()

}

private fun downloadImage(context: Context, url: String, isGif: Boolean) {
    GlideApp.with(context)
            .download(url)
            .listener(object : RequestListener<File> {
                override fun onLoadFailed(e: GlideException?, model: Any, target: Target<File>, isFirstResource: Boolean): Boolean {
                    return false
                }

                override fun onResourceReady(resource: File, model: Any, target: Target<File>, dataSource: DataSource, isFirstResource: Boolean): Boolean {
                    //Use this uri for the Commit Content API
               	   //获取到下载得到的图片，进行本地保存
                    val pictureFolder = Environment.getExternalStorageDirectory()
                    val appDir = File(pictureFolder, PATH_CAMERA_IMAGE)
                    if (!appDir.exists()) {
                        appDir.mkdirs()
                    }
                    var childName = ""
                    if (isGif) {
                        childName = "${System.currentTimeMillis()}.gif"
                    } else {
                        childName = "${System.currentTimeMillis()}.jpg"
                    }

                    val destFile = File(appDir, childName)
                    //复制文件
                    copyFile(resource, destFile)

                    if (!TextUtils.isEmpty(resource.toString())) {
                     showToast(context, "保存图片成功")
                   Util.broadcase(context, destFile)
                    } else {
                      showToast(context, "保存图片失败")
                    }
                    return false
                }
            }
            )
            .submit()
}
	//刷新相册
 public static void broadcase(Context context, File file) {
        try {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
                Intent mediaScanIntent = new Intent(
                        Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
                Uri contentUri; //out is your output file
                contentUri = Uri.fromFile(file);
                mediaScanIntent.setData(contentUri);
                context.sendBroadcast(mediaScanIntent);
            } else {
                context.sendBroadcast(new Intent(
                        Intent.ACTION_MEDIA_MOUNTED,
                        Uri.parse("file://"
                                + Environment.getExternalStorageDirectory())));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
     /**
 * @param oldFile 输入文件
 * @param newFile 输出文件
 */
public static void copyFile(File oldFile, File newFile) {
    FileInputStream fileInputStream = null;
    FileOutputStream fileOutputStream = null;
    try {
        fileInputStream = new FileInputStream(oldFile);
        fileOutputStream = new FileOutputStream(newFile);
        byte[] buffer = new byte[1024];
        while (fileInputStream.read(buffer) > 0) {
            fileOutputStream.write(buffer);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            fileInputStream.close();
            fileOutputStream.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}