Question

我正在做一个考勤系统项目，在那里我阅读教师姓名，课程，学生和学生课程，最后是学生缺席。这是学生档案：

6
12 Ahmed Suliman 2
ECCE230 0
ECCE356 0
71 Abdulrahim Naser 2
ECCE436 0
ECCE430 0
94 Huda Bassam 3
ECCE356 0
ECCE436 0
ECCE430 0
26 Amna Alzaabi 1
ENGR112 0
52 Mohamed Almansoori 3
ECCE356 0
ECCE430 0
ECCE230 0
80 Noor Alantali 1
ENGR112 0

这是我用来阅读它们的代码：

int studID[];

    String studFname[], studLname[], studCo[]; int noc, nos;
    Course c[];
    AssetManager assetManager = getAssets();
    InputStream input2;

    try {

    int CStuds = 0;
    input2 = assetManager.open("Student info.txt");
    Scanner studscan = new Scanner(input2);
    nos = studscan.nextInt();
    studID = new int[nos];
    studFname = new String[nos];
    studLname = new String[nos];
    for (int e = 0; e < nos; e++)
    {
        studID[e] = studscan.nextInt();
        studFname[e] = studscan.next();
        studLname[e] = studscan.next();
        noc = studscan.nextInt();
        studCo = new String[noc];
        studAbs = new int[noc];
        for (int q = 0; q < noc; q++)
        {
            studCo[q] = studscan.next();
            studAbs[q] = studscan.nextInt();


        }
       for (int h = 0; h < noc; h++){
           if (InsCourse.equals(studCo[h]))
        {
            SelectedStuds[CStuds] = studID[e] + " - "+ studFname[e] + " " + studLname[e];
            studAbs = new int[nos];
            StudentAbsence[CStuds] = studAbs[e];
           //Toast.makeText(getBaseContext(), SelectedStuds[a], Toast.LENGTH_SHORT).show();
            CStuds++;
    }
        }
    }
    studscan.close();

    //Toast.makeText(getBaseContext(), SelectedStuds[0], Toast.LENGTH_SHORT).show();

    CourseStudents = new String[SelectedStuds.length];
    StudentsAbs = new String[SelectedStuds.length];
    for (int t = 0; t < SelectedStuds.length; t++) {
        CourseStudents[t] = SelectedStuds[t];
        StudentsAbs[t] = StudentAbsence[t] + "%";
    }
   // Toast.makeText(getBaseContext(), SelectedStuds[0] + SelectedStuds[1], Toast.LENGTH_SHORT).show();
   android.R.layout.simple_list_item_1 ,instructorArray);



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

我没有在此处粘贴完整代码，但这足以解决问题。所以我在那里读到的东西叫做StudsAbs，它就是缺席。在文件中它的当前为0;我要创建一个按钮，按下时应该为特定学生更新此值。但是，我想知道如何更改文件中一个学生的特定值并在程序中显示它。那么如何替换输入文件中的特定值或单词并更新它以再次显示？This picture is an example of the attendace. I want the 0% to change when I click save attendance, but how to replace a specific value in the input file?

替换输入文件中的单词

0 个答案: