如何使用 TextWatcher Android 将 3 位小数货币格式添加到edittext

Question

我想使用 TextWatcher 将 3 个小数位 货币格式 添加到 EditText 一开始，值是0.000，数字应该从右到左变化

例如：如果我按顺序按 1、2、3、4、5，则值应显示为 12.345

以下代码仅适用于小数点后 2 位。请任何人帮助我如何将此代码更改为小数点后 3 位或其他解决方案

 public class CurrencyTextWatcher  implements TextWatcher {
    boolean mEditing;
    Context context;


    public CurrencyTextWatcher() {
        mEditing = false;
    }

    public synchronized void afterTextChanged(Editable s) {

        if(!mEditing) {
            mEditing = true;
            String digits = s.toString().replaceAll("\\D", "");
             NumberFormat nf = NumberFormat.getCurrencyInstance();

            try{
                String formatted = nf.format(Double.parseDouble(digits)/100);
                s.replace(0, s.length(), formatted);
            } catch (NumberFormatException nfe) {
                s.clear();
            }
            mEditing = false;
        }
    }

    public void beforeTextChanged(CharSequence s, int start, int count, int after) { }

    public void onTextChanged(CharSequence s, int start, int before, int count) { }

}

Answer 1

除以 1000 而不是 100，还将 setMinimumFractionDigits 与 NumberFormat 除以 3。

public class CurrencyTextWatcher  implements TextWatcher {
    boolean mEditing;
    Context context;


    public CurrencyTextWatcher() {
        mEditing = false;
    }

    public synchronized void afterTextChanged(Editable s) {

        if(!mEditing) {
            mEditing = true;
            String digits = s.toString().replaceAll("\\D", "");
            NumberFormat nf = NumberFormat.getCurrencyInstance();
            nf.setMinimumFractionDigits(3);

            try{
                String formatted = nf.format(Double.parseDouble(digits)/1000);
                s.replace(0, s.length(), formatted);
            } catch (NumberFormatException nfe) {
                s.clear();
            }
            mEditing = false;
        }
    }

    public void beforeTextChanged(CharSequence s, int start, int count, int after) { }

    public void onTextChanged(CharSequence s, int start, int before, int count) { }

}