android - 如何获取保存的文本文件的内容（Java）

Question

有没有办法将文本文件的内容作为字符串获取？

例如，我的文件内容为：

姓名：约翰，年龄：34，电子邮件：[e-mail]

我见过类似的问题，但他们没有让我到任何地方。

编辑：我的代码 -

        String fileName = "Sample" + ".txt";
        File file = new File(Environment.getExternalStoragePublicDirectory(
                Environment.DIRECTORY_DOCUMENTS) + File.separator + fileName);

        try {
            BufferedReader br = new BufferedReader(new FileReader(file));

            String currentLine;
            String content;
            StringBuilder stringBuilder = new StringBuilder();

            while ((currentLine = br.readLine()) != null) {
                stringBuilder.append(currentLine);
            }

            content = stringBuilder.toString();
            System.out.println(content);
        } catch (IOException e) {
            e.printStackTrace();
        }
    } 



// somewhere else in the code
final Button viewData = findViewById(R.id.viewData); // Defining the viewData button

viewData.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                viewFileData();
            }
        });

谢谢你的帮助。

标签： androidandroid-studiotext-filestostring

Answer 1

你可以尝试一些这样的想法。

public class Main {

    public static void main(String[] args) throws IOException {

        File file = new File("C:\\Users\\Hasindu\\Desktop\\javaSample\\src\\sample\\sample.txt");//Text file location

        BufferedReader br = new BufferedReader(new FileReader(file));

        String currentLine;
        String content = null;
        StringBuilder stringBuilder = new StringBuilder();//Using the StringBuilder class of java for the concatenation.

        while ((currentLine = br.readLine()) != null) {
      
            stringBuilder.append(currentLine); //Read all the lines in the text file and concatenate them for a single stringBulder object.

        }
        content = stringBuilder.toString();//Coverting the StringBuilder object to a String
        System.out.println(content);


    }



}