android - 不读utf-8标记

我的SD卡上有一个.txt文件，上面带有utf-8标记：

“ Jakprzetrwaćwśródczarnych dziur”

这就是我尝试从此文件中读取它们的方式：

public static void readBooksFromTxtFile(Context context, String filePath, ArrayList<SingleBook> books) {
    BufferedReader in;
    try {
        in = new BufferedReader(new InputStreamReader(new FileInputStream(filePath), "UTF-8"));
        String line = null;
        while ((line = in.readLine()) != null) {
            String title = line;
            String author = in.readLine();
            String pages = in.readLine();
            String date = in.readLine();

            // just for debugging
            System.out.println(title);

            books.add(new SingleBook(title, author, pages, date));
        }
    } catch (Exception e) {
        Toast.makeText(context, "Error during reading file.", Toast.LENGTH_LONG).show();
        return;
    }
}

但是它无法正确读取文件：



我究竟做错了什么？

最佳答案

我相信您的问题在这里：

in = new BufferedReader(new InputStreamReader(new FileInputStream(filePath), "UTF-8"));

相反，它应该是

in = new BufferedReader(new FileReader(new File(filePath));

这应该正确阅读。如果没有，则可以使用RandomAccessFile：

public static void readBooksFromTxtFile(Context context, String filePath, ArrayList<SingleBook> books) {
RandomAccessFile in;
try {
    in = new RandomAccessFile(new File(filePath), "r");
    String line = null;
    while ((line = in.readUTF8()) != null) {
        String title = line;
        String author = in.readUTF8();
        String pages = in.readUTF8();
        String date = in.readUTF8();

        // just for debugging
        System.out.println(title);

        books.add(new SingleBook(title, author, pages, date));
    }
} catch (Exception e) {
    Toast.makeText(context, "Error during reading file.", Toast.LENGTH_LONG).show();
    return;
}
}