Java 标签需要反映所有arrayList元素的总和，只反映最新的元素

晚上好，伙计们！快速提问

我试图在我的应用程序中获得一个标签，以反映每次按下保存按钮时不断累积的一组整数的总和

此外，我想使用文件输入/输出来保存用户输入，以便将其存储到文件中并在以后检索，但这是另一次的问题

我可以让标签反映一个数字，该数字等于用户输入的最新整数，但我需要标签反映用户输入的所有整数的总和

请看一看，我不知道为什么它没有做它应该做的：

public View.OnClickListener onSave = new View.OnClickListener (){


    @Override
    public void onClick(View v) {

        Info r = new Info();

        EditText name = (EditText) findViewById(R.id.field_transaction);
        EditText address = (EditText) findViewById(R.id.field_income_expense);
        TextView total= (TextView)findViewById(R.id.total);
        RadioGroup types = (RadioGroup) findViewById(R.id.rgrp_types);
        switch (types.getCheckedRadioButtonId()) {
        case R.id.rbtn_income:
            r.setType("income");
            break;
        case R.id.rbtn_expense:
            r.setType("expense");
            break;

        }

        r.setName(transaction.getText().toString());
        r.setAddress(income_expense.getText().toString());
        r.setTotal(total.getText().toString());

        String data = (income_expense.getText().toString()); //To get the value of income/expense and put it in a string

        try {
        fos = openFileOutput(FILENAME, Context.MODE_PRIVATE);
        fos.write(data.getBytes()); //To put string into FOS file
        fos.close();
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        ArrayList<Integer> storage = new ArrayList<>();
        String collected = null;
        FileInputStream fis = null;
        int process = 0;
        int sum = 0;

        try {
            fis = openFileInput(FILENAME);
            byte[] dataArray = new byte[fis.available()];

            int counter= 0;

            while (fis.read(dataArray) != -1){ //Loops all code inside while there is still date inside file to read
            collected = new String(dataArray); //Puts data into a string
            process = Integer.parseInt( collected ); //Coverts that string itno an int.
            storage.add(process); //Adds that int into an ArrayList

            for(int i: storage){ //Adds all elements in the current state of the ArrayList together and makes puts it in int sum
                  sum += i;
              }
            }
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } finally {
            try {
                fis.close();
                total.setText("Balance Total: " + sum + "Php"); //It is supposed to print the sum of all elements, but all it does is print the last input entered by user
        }   catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
        }
        }


        Log.d("FoodTripActivity", "Name: " + r.getName() + "Address: " + r.getAddress() + "Type: " + r.getType());
        adapter.add(r);


    }               
};

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你知道有什么可以退货吗？您希望fis.readdataArray做什么？在此之后，您希望dataArray包含什么？请删除保存到文件中的代码，然后重新读取。让我们先把注意力集中在第一个问题上。你添加了一个Info类的实例，为什么称它为r？到带有adapter.addr的适配器；因此，适配器具有所有值。标签在哪里？是文本视图吗？你看到你对sum什么都不做了吗？