您可能会想要这样做：

private void listFiles(String dirFrom) {
        Resources res = getResources(); //if you are in an activity
        AssetManager am = res.getAssets();
        String fileList[] = am.list(dirFrom);

            if (fileList != null)
            {   
                for ( int i = 0;i<fileList.length;i++)
                {
                    Log.d("",fileList[i]); 
                }
            }
    }

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另外，如果要列出图像，则函数调用应为：listFiles("images");。

最简单的肯定是这样：

String[] fileList = getAssets().list("images");

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@user答案的改进版本，在Kotlin中[递归]

fun listAssetFiles(context: Context, path: String,block:(isDir:Boolean,path:String)->Unit):Boolean{
    try {
        val list = context.assets.list(path)
        list?.also {files->
            if (files.isNotEmpty()) {
                for (file in files) {
                    val relativePath=if (path.isEmpty()) file else "$path${File.separatorChar}$file"
                    if (!listAssetFiles(context,relativePath,block))
                        block.invoke(false,relativePath) else block.invoke(true,relativePath)
                }
            } else return false
        }
    } catch (e: IOException) {
        return false
    }
    return true
}

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用途：

val fileList = mutableListOf<String>()
    val folderList = mutableListOf<String>()
    listAssetFiles(getApplication(), "my/sample/folder") // or empty for the root folder 
    { isDir, path ->
        if (isDir) folderList.add(path) else fileList.add(path)
    }

型