How to set values in cell to write in Android Studio

I managed to set label for my Excel, but I want to set values to cells which is an array and I want to set values with For loop but with this code my for loop doesn't work and label 4 and 5 don't write in my Excel file. how can i set values to cells that those values change in every iteration?

String sdCard = getExternalFilesDir("/").getAbsolutePath();
File directory = new File(sdCard + "/MyFolder/");

//create directory if not exist
if(!directory.isDirectory()){
    directory.mkdirs();
    //Toast.makeText(getApplicationContext(),"dir",Toast.LENGTH_LONG).show();
}
//file path
File file = new File(directory, fileName);
WorkbookSettings wbSettings = new WorkbookSettings();
//wbSettings.setLocale(new Locale("en", "EN"));
WritableWorkbook workbook;
try {
    int a = 1;
    workbook = Workbook.createWorkbook(file, wbSettings);
    //Toast.makeText(getApplicationContext(),"done4",Toast.LENGTH_LONG).show();
    //Excel sheet name. 0 represents first sheet
    WritableSheet sheet = workbook.createSheet("Mydata1", 0);
    //Toast.makeText(getApplicationContext(),"done3",Toast.LENGTH_LONG).show();

    Label label0 = new Label(0,0,"Date");
    Label label1 = new Label(1,0,"time");
    Label label2 = new Label(2,0,"xCor");
    Label label3 = new Label(3,0,"score");
    Label label7 = new Label(2,1,xCor[2]);


    try {
        sheet.addCell(label0);
        sheet.addCell(label1);
        sheet.addCell(label2);
        sheet.addCell(label3);

        for(int i3 = 1; i3==j+1 ; i3++) {
            String text = xCor[i3];
            sheet.getWritableCell(text);
            Label label4 = new Label(2,i3,text);
            Label label5 = new Label(1,i3,text);
            sheet.addCell(label4);
            sheet.addCell(label5);
        }


        sheet.addCell(label7);
    } catch (RowsExceededException e) {
        e.printStackTrace();
    } catch (WriteException e) {
        e.printStackTrace();
    }
    workbook.write();
    try {
        workbook.close();
    } catch (WriteException e) {

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

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