如何创建仅以货币格式格式化输入的edittext条目？当用户输入5时，我希望输入看起来像“$ 0.05”，当他们输入3时，输入现在看起来像“$ 0.53”，最后输入6，输入看起来像“$ 5.36”。
答案 0 :(得分：8)
对于第一个问题我还没有解决方案，对于第二个这样的代码有效：
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count) {
if(!s.toString().matches("^\\$(\\d{1,3}(\\,\\d{3})*|(\\d+))(\\.\\d{2})?$"))
{
String userInput= ""+s.toString().replaceAll("[^\\d]", "");
StringBuilder cashAmountBuilder = new StringBuilder(userInput);
while (cashAmountBuilder.length() > 3 && cashAmountBuilder.charAt(0) == '0') {
cashAmountBuilder.deleteCharAt(0);
}
while (cashAmountBuilder.length() < 3) {
cashAmountBuilder.insert(0, '0');
}
cashAmountBuilder.insert(cashAmountBuilder.length()-2, '.');
cashAmountBuilder.insert(0, '$');
cashAmountEdit.setText(cashAmountBuilder.toString());
}
}
答案 1 :(得分：3)
建立Zds。
为了使光标位于字段的末尾，请使用此。
cashAmountEdit.setTextKeepState(cashAmountBuilder.toString());
Selection.setSelection(cashAmountEdit.getText(), cashAmountBuilder.toString().length());
答案 2 :(得分：1)
您可以使用TextWatcher来执行此类操作。
扩展TextWatcher：http://d.android.com/reference/android/text/TextWatcher.html
public class MyTextWatcher implements TextWatcher {
public void afterTextChanged(Editable arg0) {
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
}
然后使用
将其添加到editTextmyEditText.addTextChangedListener(new MyTextWatcher());
答案 3 :(得分：1)
我发现TextWatcher有点麻烦。相反，您可以设置键侦听器：
setKeyListener(new CalculatorKeyListener());
// Must be called after setKeyListener(), otherwise is overridden
setRawInputType(Configuration.KEYBOARD_12KEY);
然后创建一个扩展NumberKeyListener的KeyListener：
class CalculatorKeyListener extends NumberKeyListener {
@Override
public int getInputType() {
return InputType.TYPE_CLASS_NUMBER;
}
@Override
public boolean onKeyDown(View view, Editable content, int keyCode, KeyEvent event) {
if (keyCode >= KeyEvent.KEYCODE_0 && keyCode <= KeyEvent.KEYCODE_9) {
digitPressed(keyCode - KeyEvent.KEYCODE_0);
} else if (keyCode == KeyEvent.KEYCODE_DEL) {
deletePressed();
}
return true;
}
@Override
protected char[] getAcceptedChars() {
return new char[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
}
}
然后你需要正确显示字符，但这并不困难;只需跟踪美分，然后除以或乘以10，并使用NumberFormat来确保格式正确。
答案 4 :(得分：1)
继承我的完整解决方案：
tvValue.setRawInputType(Configuration.KEYBOARD_12KEY);
tvValue.addTextChangedListener(new TextWatcher(){
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start,
int count, int after) {
// TODO Auto-generated method stub
}
@Override
public void onTextChanged(CharSequence s, int start,
int before, int count) {
// TODO Auto-generated method stub
// here i converted to string
if(!s.toString().matches("^\\$(\\d{1,3}(\\,\\d{3})*|(\\d+))(\\.\\d{2})?$"))
{
String userInput= ""+s.toString().replaceAll("[^\\d]", "");
Float in=Float.parseFloat(userInput);
float percen = in/100;
tvValue.setText("$"+percen);
}
}
});
答案 5 :(得分：0)
我做了这个，但是没有小数，并且有里程点，请检查代码并添加支持小数的功能。
MyEditText.addTextChangedListener(new TextWatcher()
{
@Override
public void onTextChanged(CharSequence s, int start, int before, int count){
if(s.toString().length() > 0){
MyEditText.removeTextChangedListener(this);
String numbers = removeCharacters(s.toString());
int money = 0;
try{
money = Integer.parseInt(numbers);
}
catch(Exception ex){
money = 0;
}
MyEditText.setText(getMoney(money));
//Set cursor on correct position
int selection = start;
if(count > 0){
selection++;
if(MyEditText.getText().toString().length() == 2 || MyEditText.getText().toString().length() == 6 || MyEditText.getText().toString().length() == 10){
selection++;
}
}
else{
if(MyEditText.getText().toString().length() == 4 || MyEditText.getText().toString().length() == 8){
selection--;
}
}
if(selection > MyEditText.getText().toString().length()){
selection = MyEditText.getText().toString().length();
}
MyEditText.setSelection(selection);
MyEditText.addTextChangedListener(this);
}
if(s.toString().length() == 1 && count < 1 && start == 1){
MyEditText.removeTextChangedListener(this);
MyEditText.setText("");
MyEditText.addTextChangedListener(this);
}
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after){
}
@Override
public void afterTextChanged(Editable s)
{
}
});
public String removeCharacters(String money){
int i=0;
while (i<money.length())
{
Character c = money.charAt(i);
if (Character.isDigit(c) && c != '.')
{
i++;
}
else
{
money = money.replace(c.toString(), "");
}
}
return money;
}
public String getMoney(int value){
String money = "$";
NumberFormat numberFormatter;
numberFormatter = NumberFormat.getNumberInstance(Locale.GERMAN);
money += numberFormatter.format(value);
return money;
}
答案 6 :(得分：0)
此答案基于Zds' answer（反过来基于ninjasense's answer），但这应解决光标位置问题：
if(!text.matches("^\\$(\\d{1,2})(\\.\\d{2})?$")) {
int originalCursorPosition = view.getSelectionStart();
int cursorOffset = 0;
boolean cursorAtEnd = originalCursorPosition == text.length();
String userInput= ""+text.replaceAll("[^\\d]", "");
StringBuilder cashAmountBuilder = new StringBuilder(userInput);
while (cashAmountBuilder.length() > 3 && cashAmountBuilder.charAt(0) == '0') {
cashAmountBuilder.deleteCharAt(0);
cursorOffset--;
}
while (cashAmountBuilder.length() < 3) {
cashAmountBuilder.insert(0, '0');
cursorOffset++;
}
cashAmountBuilder.insert(cashAmountBuilder.length() - 2, '.');
cashAmountBuilder.insert(0, '$');
view.setText(cashAmountBuilder.toString());
view.setSelection(cursorAtEnd ? view.getText().length() : originalCursorPosition + cursorOffset);
}
备注：
TextWatcher.onTextChanged EditText maxLength为6（即$ 00.00）