Question

我有这些方法来读取和写入文件：

/* Write content to a file */
    private void writeToFile(ArrayList<String> list) {
        File file = new File("jokesBody1.bjk");     
        FileOutputStream fos;
        if(list != null){
        try {           
                file.createNewFile();
                fos = openFileOutput("jokesBody1.bjk",Context.MODE_PRIVATE);
                ObjectOutputStream out = new ObjectOutputStream(fos);
                out.writeObject(list);
                out.close();
        } catch (FileNotFoundException e) {
                e.printStackTrace();
        } catch (IOException e) {
                e.printStackTrace(); 
        }
        }else{
            try {
                file.createNewFile();
                fos = openFileOutput("jokesBody1.bjk",Context.MODE_PRIVATE);
                ObjectOutputStream out = new ObjectOutputStream(fos);
                out.writeObject("");
                out.close();
        } catch (FileNotFoundException e) {
                e.printStackTrace();
        } catch (IOException e) {
                e.printStackTrace(); 
        }
        }
    }

    /* Read file's content */
    private ArrayList<String> readFromFile() {
        File file = new File("jokesBody1.bjk");
        ArrayList<String> list = new ArrayList<String>();
        try {
            file.createNewFile();
            ObjectInputStream ois = new ObjectInputStream( new FileInputStream( file ) );
            try {
                list = (ArrayList)ois.readObject();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }
            ois.close();
            } catch (IOException e) {
            Log.e("log activity", "Can not read file: " + e.toString());
        }

        return list;
    }

Everyrhing对我来说似乎没问题，但是当我运行代码时，我收到以下错误：

02-15 17:02:07.655: E/log activity(1882): Can not read file: java.io.IOException: open failed: EROFS (Read-only file system)

为什么系统为read only？如果file.createNewFile();

不存在，我在创建文件时是否应该执行某些操作？

我知道我错过了一些非常小的东西，但作为一个初学者，我无法发现它。

Answer 1

您可能在Linux上遇到此错误此文件系统以只读方式安装所以你不能写信给它。

由于奇怪的原因无法读取文件

1 个答案: