显示的EditText在任何时候都与2位小数号码 [英] EditText showing numbers with 2 decimals at all times
问题描述
我想有两个小数在任何时候都显示的EditText领域的投入。因此，当用户输入5，它会显示5.00或当用户输入7.5它将显示7.50
另外，我想也显示为零时，该字段为空，而不是什么都没有。
我的本钱已是inputtype设置为：
安卓inputType =号| numberDecimal/＆GT;
我应该用inputfilters这里工作？
对不起，我还是很新至Android / Java的...
感谢您的帮助！
编辑2011-07-09 23.35 - 解决了部分1 2：在0.00
通过nickfox的答案，我能解决一半的我的问题。
et.addTextChangedListener（新TextWatcher（）{
公共无效afterTextChanged（编辑S）{}
公共无效beforeTextChanged（CharSequence中，诠释开始，诠释计数，之后INT）{}
公共无效onTextChanged（CharSequence中，诠释开始，诠释之前，诠释计数）{
如果（s.toString（）。匹配（））
{
et.setText（0.00）;
Selection.setSelection（et.getText（），0，4）;
}
}
}）;
我仍然在为我的问题的另一半的解决方案。如果我找到了解决办法，我将它张贴在这里了。
编辑2011-07-09 23.35 - 解决了2第2部分：改变用户输入一个数字有两个小数
OnFocusChangeListener FocusChanged =新OnFocusChangeListener（）{
@覆盖
公共无效onFocusChange（视图V，布尔hasFocus）{
如果（！hasFocus）{
。字符串userInput = et.getText（）的toString（）;
INT dotPos = -1;
的for（int i = 0; I＆LT; userInput.length（）;我++）{
焦炭C = userInput.charAt（我）;
如果（三=='。'）{
dotPos =我;
}
}
如果（dotPos == -1）{
et.setText（userInput +0.00）;
} 其他 {
如果（userInput.length（） - dotPos == 1）{
et.setText（userInput +00）;
}否则如果（userInput.length（） - dotPos == 2）{
et.setText（userInput +0）;
}
}
}
}
下面是我用它来对美元投入。它确保只有2过去小数点位在任何时候。您应该能够以使其适应您的需求通过删除$符号。
amountEditText.setRawInputType（Configuration.KEYBOARD_12KEY）;
amountEditText.addTextChangedListener（新TextWatcher（）{
公共无效afterTextChanged（编辑S）{}
公共无效beforeTextChanged（CharSequence中，诠释开始，诠释计数，之后INT）{}
公共无效onTextChanged（CharSequence中，诠释开始，诠释之前，诠释计数）{
如果（s.toString（）的比赛（^ \\ $（\\Ð{1,3}（\\ \\ð{3}）* |！。（\\ D +））（\\ ð{2}）？$））
{
串userInput =+ s.toString（）的replaceAll。（[^ \\ D]。，）;
StringBuilder的cashAmountBuilder =新的StringBuilder（userInput）;
而（cashAmountBuilder.length（）→3＆安培;＆安培; cashAmountBuilder.charAt（0）=='0'）{
cashAmountBuilder.deleteCharAt（0）;
}
而（cashAmountBuilder.length（）3;）{
cashAmountBuilder.insert（0，'0'）;
}
cashAmountBuilder.insert（cashAmountBuilder.length（） - 2，'。'）;
cashAmountBuilder.insert（0，'$'）;
amountEditText.setText（cashAmountBuilder.toString（））;
//保持光标总是向右
Selection.setSelection（amountEditText.getText（），cashAmountBuilder.toString（）长度（））;
}
}
}）;
I would like to display the input of the EditText fields with two decimals at all times. So when the user enters 5 it will show 5.00 or when the user enters 7.5 it will show 7.50.
Besides that I would like to also show zero when the field is empty instead of nothing.
What I've got already is the inputtype set to:
android:inputType="number|numberDecimal"/>
Should I work with inputfilters here?
Sorry I still quite new to android / java...
Thanks for your help!
Edit 2011-07-09 23.35 - Solved part 1 of 2: The "" to 0.00.
With the answer of nickfox I was able to solve half of my question.
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 start, int before, int count) {
if(s.toString().matches(""))
{
et.setText("0.00");
Selection.setSelection(et.getText(), 0, 4);
}
}
});
I'm still working on a solution for the other half of my question. If I found the solution I will post it here too.
Edit 2011-07-09 23.35 - Solved part 2 of 2: Change user input to a number with two decimals.
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");
}
}
}
}
Here is something I use to for dollar input. It makes sure that there are only 2 places past the decimal point at all times. You should be able to adapt it to your needs by removing the $ sign.
amountEditText.setRawInputType(Configuration.KEYBOARD_12KEY);
amountEditText.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 start, int before, int count) {
if(!s.toString().matches("^\\$(\\d{1,3}(\\,\\d{3})*|(\\d+))(\\.\\d{2})?$"))
{
String userInput= ""+s.toString().replaceAll("[^\\d]", "");
StringBuilder cashAmountBuilder = new StringBuilder(userInput);
while (cashAmountBuilder.length() > 3 && cashAmountBuilder.charAt(0) == '0') {
cashAmountBuilder.deleteCharAt(0);
}
while (cashAmountBuilder.length() < 3) {
cashAmountBuilder.insert(0, '0');
}
cashAmountBuilder.insert(cashAmountBuilder.length()-2, '.');
cashAmountBuilder.insert(0, '$');
amountEditText.setText(cashAmountBuilder.toString());
// keeps the cursor always to the right
Selection.setSelection(amountEditText.getText(), cashAmountBuilder.toString().length());
}
}
});
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