看不懂的奇怪的原因,文件 [英] Can't read a file for strange reason
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问题描述
我的这些方法来读取和写入文件:
I have these methods for reading and writing to a file:
/* 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似乎没什么问题,但是当我运行code,我发现了以下错误:
Everyrhing seems to be fine to me, but when I run the code I'm getting the following error:
02-15 17:02:07.655: E/log activity(1882): Can not read file: java.io.IOException: open failed: EROFS (Read-only file system)
为什么系统只读
?我应该做的,当我创建的文件,如果它不被存在file.createNewFile()的东西;
Why the system is read only
? Should I do something when I'm creating the file if it does not exist by file.createNewFile();
?
我知道我失去了一些东西非常小,但作为一个总的初学者,我不能够发现它。
I know that I'm missing something extremely small, but as a total beginner, I'm not able to spot it.
推荐答案
您可能在Linux上得到这个错误。
该文件系统挂载为只读。
所以你不能写入。
You get this error probably on Linux.
This file system is mounted as read-only.
So you cannot write to it.
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