Question

我正在尝试读取.txt文件并将其附加到ArrayList。它似乎在Scanner行中失败了'java.io.FileNotFoundException：/raw/words.txt：open failed :(没有这样的文件或目录）'。我尝试过BufferReader方法并改变文件的位置但收效甚微。为什么不识别文件？

public void openFile (){
    File file = new File("raw/words.txt");
    ArrayList<String> names = new ArrayList<String>();
    try{
    Scanner in = new Scanner (file);
    while (in.hasNextLine()){
        names.add(in.nextLine());
    }
    }
    catch (Exception e){
    e.printStackTrace();
    }
    Collections.sort(names);
    for(int i=0; i<names.size(); ++i){
        System.out.println(names.get(i));
    }
}

Answer 1

是的，你不能仅仅通过raw / words.txt具体来说，android不存储路径与桌面pc相同

你需要获取他们的资源并阅读它

例如来自here

的副本

// to call this method
// String answer = readRawTextFile(mContext, R.raw.words);

public static String readRawTextFile(Context ctx, int resId)
     {
          InputStream inputStream = ctx.getResources().openRawResource(resId);

             InputStreamReader inputreader = new InputStreamReader(inputStream);
             BufferedReader buffreader = new BufferedReader(inputreader);
              String line;
              StringBuilder text = new StringBuilder();

              try {
                while (( line = buffreader.readLine()) != null) {
                    text.append(line);
                    text.append('\n');
                  }
            } catch (IOException e) {
                return null;
            }
              return text.toString();
     }

读取.txt文件列出Android / FileNotFound

1 个答案: