Clojure android无法读取文件

概述我正在尝试使用clojure创建一个简单的 Android应用程序,该应用程序读取csv文件并允许用户执行像数据搜索一样的正则表达式.问题是当我尝试读取数据时,我得到以下异常. IllegalArgumentException没有方法的实现:: make-reader of protocol：#’clojure.java.io / IOFactory for class：nil clojure.c 我正在尝试使用clojure创建一个简单的 Android应用程序,该应用程序读取csv文件并允许用户执行像数据搜索一样的正则表达式.问题是当我尝试读取数据时,我得到以下异常.

IllegalArgumentException没有方法的实现:: make-reader of protocol：#’clojure.java.io / IOFactory for class：nil clojure.core / -cache-protocol-fn(core_deftype.clj：554)

我的研究表明,这通常意味着clojure正在寻找某些东西而无法找到它.但我无法弄清楚它可能是什么或为什么.

这是抛出异常的Clojure代码：

(ns org.stuff.events.data  (:require [clojure.java.io :as io]))(def data-file (io/file (io/resource "kamus.csv")))(defn read-data [_]  (slurp data-file))

从最好的我可以告诉“kamus.csv”在正确的目录中,所以我不认为这是它.如果我在repl中评估数据文件,我会得到nil.

有人有任何想法来解决我的问题吗？

以下是其他项目文件仅供参考：

main.clj：

(ns org.stuff.events.main    (:require [neko.activity :refer [defactivity set-content-vIEw!]]              [neko.deBUG :refer [*a]]              [neko.notify :refer [toast]]              [neko.ui :refer [config]]              [neko.resource :as res]              [neko.find-vIEw :refer [find-vIEw]]              [neko.threading :refer [on-ui]]              [org.stuff.events.data :as data]              [clojure.data.csv :as csv])    (:import androID.Widget.TextVIEw));; We execute this function to import all subclasses of R class. This gives us;; access to all application resources.(res/import-all)(def Listing (atom ""))(defn get-elem [activity ID]  (str (.getText (find-vIEw activity ID))))(defn set-elem [activity ID s]  (on-ui (config (find-vIEw activity ID) :text s)))(defn add-event [activity]  (swap! Listing str (get-elem activity ::search-Box) "\n")  (set-elem activity ::results @Listing))(defn main-layout [activity]  [:linear-layout {:orIEntation :vertical}   [:linear-layout {:orIEntation :horizontal                                     :layout-height :wrap}         [:edit-text {:ID ::search-Box                      :hint "cari..."                      :layout-wIDth :fill}]         [:button {:text "Cari"                   :on-click (fn [_] (add-event (*a)))}]]   [:text-vIEw {:text @Listing                :ID ::results}]]);; This is how an Activity is defined. We create one and specify its onCreate;; method. InsIDe we create a user interface that consists of an edit and a;; button. We also give set callback to the button.(defactivity org.stuff.events.MainActivity  :key :main  (onCreate [this bundle]    (.superOnCreate this bundle)    (neko.deBUG/keep-screen-on this)    (on-ui      (set-content-vIEw! (*a)  (main-layout (*a))))))

project.csj：

(defproject events/events "0.1.0-SNAPSHOT"  :description "FIXME: AndroID project description"  :url "http://example.com/FIXME"  :license {:name "Eclipse Public license"            :url "http://www.eclipse.org/legal/epl-v10.HTML"}  :global-vars {*warn-on-reflection* true}  :source-paths ["src/clojure" "src"]  :res-path "src/main/resources"  :java-source-paths ["src/java"]  :javac-options ["-target" "1.6" "-source" "1.6" "-Xlint:-options"]  :plugins [[lein-droID "0.4.3"]]  :dependencIEs [[org.clojure-androID/clojure "1.7.0-r2"]                 [neko/neko "4.0.0-Alpha5"]                 [org.clojure/data.csv "0.1.3"] ]  :profiles {:default [:dev]             :dev             [:androID-common :androID-user              {:dependencIEs [[org.clojure/tools.nrepl "0.2.10"]]               :target-path "target/deBUG"               :androID {:aot :all-with-unused                         :rename-manifest-package "org.stuff.events.deBUG"                         :manifest-options {:app-name "EventsListing      (deBUG)"}}}]             :release             [:androID-common               {:target-path "target/release"               :androID               {;; :keystore-path "/home/user/.androID/private.keystore"                ;; :key-alias "mykeyalias"                ;; :sigalg "MD5withRSA"                :ignore-log-priority [:deBUG :verbose]                :aot :all                :build-type :release}}]}  :androID {;; Specify the path to the AndroID SDK directory.            :sdk-path "C:\Users\fhard\AppData\Local\AndroID\sdk"            ;; Try increasing this value if dexer fails with            ;; OutOfMemoryException. Set the value according to your            ;; available RAM.            :dex-opts ["-JXmx4096M" "--incremental"]            :target-version "15"            :aot-exclude-ns ["clojure.parallel" "clojure.core.reducers"                         "cider.nrepl" "cider-nrepl.plugin"                             "cider.nrepl.mIDdleware.util.java.parser"                             #"clJs-tooling\..+"]})

解决方法 从例外情况来看,根据 this answer看起来你的路径错了.当我尝试用io / resource打开一个文件时,即使文件实际存在,我也会得到同样的错误. io/reader可能更容易使用,因为它会将您的输入强制转换为读者对象.另一方面,io / resource返回一个URL,其路径在jar内部发生变化. Check this. 总结

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