我想随时显示两个小数的EditText字段的输入.所以当用户输入5时,会显示5.00或当用户输入7.5时显示7.50.
除此之外,我也希望在字段为空而不是空的时候显示为零.
我已经将inputtype设置为：
android:inputType="number|numberDecimal"/>
我应该在这里使用inputfilters吗？
对不起我还是很新的android / java …
谢谢你的帮助！
编辑2011-07-09 23.35 – 解决第1部分2：“”到0.00.
有了nickfox的答案,我能够解决我的一半问题.
et.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {}
public void beforeTextChanged(CharSequence s,int start,int count,int after) {}
public void onTextChanged(CharSequence s,int before,int count) {
if(s.toString().matches(""))
{
et.setText("0.00");
Selection.setSelection(et.getText(),4);
}
}
});
我还在为另一半的问题找一个解决方案.如果我找到解决方案,我也会在这里发布.
编辑2011-07-09 23.35 – 解决第2部分2：将用户输入更改为具有两位小数的数字.
OnFocusChangeListener FocusChanged = new OnFocusChangeListener() {
@Override
public void onFocusChange(View v,boolean hasFocus) {
if(!hasFocus){
String userInput = et.getText().toString();
int dotPos = -1;
for (int i = 0; i < userInput.length(); i++) {
char c = userInput.charAt(i);
if (c == '.') {
dotPos = i;
}
}
if (dotPos == -1){
et.setText(userInput + ".00");
} else {
if ( userInput.length() - dotPos == 1 ) {
et.setText(userInput + "00");
} else if ( userInput.length() - dotPos == 2 ) {
et.setText(userInput + "0");
}
}
}
}
解决方法
这是我用于美元输入的东西.它确保始终只有2个小数点.您应该能够通过删除$符号来适应您的需求.
amountEditText.setRawInputType(Configuration.KEYBOARD_12KEY);
amountEditText.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {}
public void beforeTextChanged(CharSequence s,int after) {}
public void onTextChanged(CharSequence s,int count) {
if(!s.toString().matches("^\\$(\\d{1,3}(\\,\\d{3})*|(\\d+))(\\.\\d{2})?$"))
{
String userInput= ""+s.toString().replaceAll("[^\\d]","");
StringBuilder cashAmountBuilder = new StringBuilder(userInput);
while (cashAmountBuilder.length() > 3 && cashAmountBuilder.charAt(0) == '0') {
cashAmountBuilder.deleteCharAt(0);
}
while (cashAmountBuilder.length() < 3) {
cashAmountBuilder.insert(0,'0');
}
cashAmountBuilder.insert(cashAmountBuilder.length()-2,'.');
cashAmountBuilder.insert(0,'$');
amountEditText.setText(cashAmountBuilder.toString());
// keeps the cursor always to the right
Selection.setSelection(amountEditText.getText(),cashAmountBuilder.toString().length());
}
}
});
