如何添加 3 位小数 货币格式以编辑文本 使用文本观察器 Android

Question

我想使用 TextWatcher 为 EditText 添加 3 位小数的货币格式在开始时，值为 0.000，数字应从右向左更改

例如：如果我按 1,2,3,4,5 的订单值应该显示为这个 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，并将NumberFormat setMinimumFractionDigits为 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) { }
}