向微调器添加数据

嘿,所以我正在为uni构建一个迷你应用程序,它基本上是用预先存在的数据加载一个微调器,用户还可以通过多个字段将数据添加到文件中。当用户填写字段并单击按钮时,我将其添加到相关数组列表的数据中。

adapter 方法,例如 adapter.add(nametxt.getText().toString()) .

public void addinglocations(View view){
    String filename = "au_locations.txt";

//add the edittext fields to the arrays lists
    names.add(nametxt.getText().toString());
    lats.add(Double.parseDouble(lattxt.getText().toString()));
    longs.add(Double.parseDouble(longtxt.getText().toString()));
    timezone.add(tztxt.getText().toString());

//writing to file
    String fileContents = nametxt.getText().toString() + "," + lattxt.getText().toString() + "," + longtxt.getText().toString() + "," +  tztxt.getText().toString() + "\r\n";
    FileOutputStream outputStream;

    try {
        outputStream = openFileOutput(filename, Context.MODE_APPEND);
        outputStream.write(fileContents.getBytes());
        outputStream.close();
    } catch (Exception e) {
        e.printStackTrace();
    }