java - 如何在android studio中成对保存问题和答案？

Question

我正在尝试创建一个应用程序，用户可以在其中输入多个问题和答案，然后该应用程序会读取这些内容。我无法一次将多个值保存到一个文件中。这是我目前拥有的:

// write text to file
public void WriteBtn(View v) {
    // add-write text into file
    try {
        FileOutputStream fileout=openFileOutput("question.txt", MODE_PRIVATE);
        OutputStreamWriter outputWriter=new OutputStreamWriter(fileout);
        outputWriter.write(question.getText().toString());
        outputWriter.close();

        //display file saved message
        Toast.makeText(getBaseContext(), "File saved successfully!",
                Toast.LENGTH_SHORT).show();
        //n++;
    } catch (Exception e) {
        e.printStackTrace();
    }
}

和阅读:

public void ReadBtn(View v) {
    //reading text from file
    try {
        FileInputStream fileIn=openFileInput("question.txt");
        InputStreamReader InputRead= new InputStreamReader(fileIn);

        char[] inputBuffer= new char[READ_BLOCK_SIZE];
        String s="";
        int charRead;

        while ((charRead=InputRead.read(inputBuffer))>0) {
            // char to string conversion
            String readstring=String.copyValueOf(inputBuffer,0,charRead);
            s +=readstring;
        }
        InputRead.close();
        //question.setText(s);
        questionArea.setText(s);
        //Toast.makeText(getBaseContext(), s,Toast.LENGTH_SHORT).show();

    } catch (Exception e) {
        e.printStackTrace();
    }
}

任何帮助都会很棒!

Answer 1

你需要设置模式追加也可以这样做
openFileOutput(名称, MODE_PRIVATE | MODE_APPEND);