实时编辑后如何在android EditText中设置数字格式
我有一个EditText,用户应该在其中输入一个数字,包括小数,我希望在输入数字上自动添加1000个分隔符。我尝试了一些其他方法,但有些方法不允许使用浮点数,因此我提出了这段代码,它很好地工作,只是字符串输入没有被实时编辑为1可能的千个分隔符和错误似乎源于s.replace()实时编辑后如何在android EditText中设置数字格式,android,android-edittext,number-formatting,Android,Android Edittext,Number Formatting,我有一个EditText,用户应该在其中输入一个数字,包括小数,我希望在输入数字上自动添加1000个分隔符。我尝试了一些其他方法,但有些方法不允许使用浮点数,因此我提出了这段代码,它很好地工作,只是字符串输入没有被实时编辑为1可能的千个分隔符和错误似乎源于s.replace() am2=newtextWatcher(){ 更改前文本之前的公共void(字符序列s、int start、int count、int after){ } public void onTextChanged(字符序列,in
am2=newtextWatcher(){
更改前文本之前的公共void(字符序列s、int start、int count、int after){
}
public void onTextChanged(字符序列,int start,int before,int count){}
公共无效后文本已更改(可编辑){
如果(s.toString().equals(“”){
金额.setText(“”);
数值=0;
}否则{
StringBuffer strBuff=新的StringBuffer();
字符c;
for(int i=0;i
您需要将DecimalFormat
类与DecimalFormatSymbols
类一起使用,请检查以下方法
public static String formatAmount(int num)
{
DecimalFormat decimalFormat = new DecimalFormat();
DecimalFormatSymbols decimalFormateSymbol = new DecimalFormatSymbols();
decimalFormateSymbol.setGroupingSeparator(',');
decimalFormat.setDecimalFormatSymbols(decimalFormateSymbol);
return decimalFormat.format(num);
}
这个类解决了这个问题,允许十进制输入,并添加了1000个分隔符
public class NumberTextWatcher implements TextWatcher {
private DecimalFormat df;
private DecimalFormat dfnd;
private boolean hasFractionalPart;
private EditText et;
public NumberTextWatcher(EditText et)
{
df = new DecimalFormat("#,###.##");
df.setDecimalSeparatorAlwaysShown(true);
dfnd = new DecimalFormat("#,###");
this.et = et;
hasFractionalPart = false;
}
@SuppressWarnings("unused")
private static final String TAG = "NumberTextWatcher";
public void afterTextChanged(Editable s)
{
et.removeTextChangedListener(this);
try {
int inilen, endlen;
inilen = et.getText().length();
String v = s.toString().replace(String.valueOf(df.getDecimalFormatSymbols().getGroupingSeparator()), "");
Number n = df.parse(v);
int cp = et.getSelectionStart();
if (hasFractionalPart) {
et.setText(df.format(n));
} else {
et.setText(dfnd.format(n));
}
endlen = et.getText().length();
int sel = (cp + (endlen - inilen));
if (sel > 0 && sel <= et.getText().length()) {
et.setSelection(sel);
} else {
// place cursor at the end?
et.setSelection(et.getText().length() - 1);
}
} catch (NumberFormatException nfe) {
// do nothing?
} catch (ParseException e) {
// do nothing?
}
et.addTextChangedListener(this);
}
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().contains(String.valueOf(df.getDecimalFormatSymbols().getDecimalSeparator())))
{
hasFractionalPart = true;
} else {
hasFractionalPart = false;
}
}
}
公共类NumberTextWatcher实现TextWatcher{
专用分码格式df;
私有决策格式dfnd;
私有布尔部分;
私人编辑;
公用号码ExtWatcher(编辑文本et)
{
df=新的十进制格式(“#,###.##”);
df.setDecimalSeparatorAlwaysShown(真);
dfnd=新的十进制格式(“#,####”);
this.et=et;
hasstatilpart=false;
}
@抑制警告(“未使用”)
私有静态最终字符串标记=“NumberTextWatcher”;
公共无效后文本已更改(可编辑)
{
et.removeTextChangedListener(此);
试一试{
内伊尼伦,恩德伦;
inilen=et.getText().length();
String v=s.toString().replace(String.valueOf(df.getDecimalFormatSymbols().getGroupingSeparator()),“”);
数字n=df.parse(v);
int cp=et.getSelectionStart();
if(hasstatilpart){
et.setText(df.format(n));
}否则{
et.setText(dfnd.format(n));
}
endlen=et.getText().length();
int sel=(cp+(endlen-inilen));
如果(sel>0&&sel很不幸,代码没有像答案中那样工作
它有两个问题:
如果电话区域设置配置使用“,”作为十进制分隔符,则此选项不起作用
如果数字的小数部分有尾随的零,则不起作用。示例1.01
我疯狂地去修理它。
最后,我找到了在我的手机上运行良好的代码:
NumberTextWatcher.java
import android.text.Editable;
import android.text.TextWatcher;
import android.text.method.DigitsKeyListener;
import android.util.Log;
import android.widget.EditText;
import java.math.RoundingMode;
import java.text.DecimalFormat;
import java.text.DecimalFormatSymbols;
import java.text.ParseException;
import java.util.Locale;
public class NumberTextWatcher
implements TextWatcher {
private static final String TAG = "NumberTextWatcher";
private final int numDecimals;
private String groupingSep;
private String decimalSep;
private boolean nonUsFormat;
private DecimalFormat df;
private DecimalFormat dfnd;
private boolean hasFractionalPart;
private EditText et;
private String value;
private String replicate(char ch, int n) {
return new String(new char[n]).replace("\0", "" + ch);
}
public NumberTextWatcher(EditText et, Locale locale, int numDecimals) {
et.setKeyListener(DigitsKeyListener.getInstance("0123456789.,"));
this.numDecimals = numDecimals;
DecimalFormatSymbols symbols = new DecimalFormatSymbols(locale);
char gs = symbols.getGroupingSeparator();
char ds = symbols.getDecimalSeparator();
groupingSep = String.valueOf(gs);
decimalSep = String.valueOf(ds);
String patternInt = "#,###";
dfnd = new DecimalFormat(patternInt, symbols);
String patternDec = patternInt + "." + replicate('#', numDecimals);
df = new DecimalFormat(patternDec, symbols);
df.setDecimalSeparatorAlwaysShown(true);
df.setRoundingMode(RoundingMode.DOWN);
this.et = et;
hasFractionalPart = false;
nonUsFormat = !decimalSep.equals(".");
value = null;
}
@Override
public void afterTextChanged(Editable s) {
Log.d(TAG, "afterTextChanged");
et.removeTextChangedListener(this);
try {
int inilen, endlen;
inilen = et.getText().length();
String v = value.replace(groupingSep, "");
Number n = df.parse(v);
int cp = et.getSelectionStart();
if (hasFractionalPart) {
int decPos = v.indexOf(decimalSep) + 1;
int decLen = v.length() - decPos;
if (decLen > numDecimals) {
v = v.substring(0, decPos + numDecimals);
}
int trz = countTrailingZeros(v);
StringBuilder fmt = new StringBuilder(df.format(n));
while (trz-- > 0) {
fmt.append("0");
}
et.setText(fmt.toString());
} else {
et.setText(dfnd.format(n));
}
endlen = et.getText().length();
int sel = (cp + (endlen - inilen));
if (sel > 0 && sel <= et.getText().length()) {
et.setSelection(sel);
} else {
// place cursor at the end?
et.setSelection(et.getText().length() - 1);
}
} catch (NumberFormatException | ParseException nfe) {
// do nothing?
}
et.addTextChangedListener(this);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
Log.d(TAG, "beforeTextChanged");
value = et.getText().toString();
}
private int countTrailingZeros(String str) {
int count = 0;
for (int i = str.length() - 1; i >= 0; i--) {
char ch = str.charAt(i);
if ('0' == ch) {
count++;
} else {
break;
}
}
return count;
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
Log.d(TAG, "onTextChanged");
String newValue = s.toString();
String change = newValue.substring(start, start + count);
String prefix = value.substring(0, start);
String suffix = value.substring(start + before);
if (".".equals(change) && nonUsFormat) {
change = decimalSep;
}
value = prefix + change + suffix;
hasFractionalPart = value.contains(decimalSep);
Log.d(TAG, "VALUE: " + value);
}
}
您可以像这样使用kotlin扩展函数
fun EditText.onCommaChange(input: (String) -> Unit) {
this.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable?) {
if (!edit) {
edit = true
if (s.toString() != "₹") {
try {
val flNumber = getCommaLessNumber(s.toString()).toInt()
val fNumber = getFormattedAmount(flNumber)
setText(fNumber)
setSelection(text.length)
input(flNumber.toString())
} catch (e: NumberFormatException) {
Timber.e(e)
}
} else {
setText("")
input("")
}
edit = false
}
}
override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {}
override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {}
})}
fun getCommaLessNumber(commaNumber: String): String {
var number = commaNumber.replace("₹", "")
number = number.replace(",".toRegex(), "")
return number}
fun getFormattedAmount(amount: Int): String {
return "₹${String.format("%,d", amount)}"}
fun EditText.text() = this.text.toString()
我在Kotlin中使用这种方式进行对话框:
val et = dialog.findViewById(R.id.etNumber) as EditText
et.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable) {
et.removeTextChangedListener(this)
forChanged(et)
et.addTextChangedListener(this)
}
override fun beforeTextChanged(
s: CharSequence,
start: Int,
count: Int,
after: Int
) {
}
override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
}
})
然后写一个这样的方法:
private fun forChanged(alpha: EditText) {
val string = alpha.text.toString()
val dec = DecimalFormat("#,###")
if (!TextUtils.isEmpty(string)) {
val textWC = string.replace(",".toRegex(), "")
val number = textWC.toDouble()
alpha.setText(dec.format(number))
alpha.setSelection(dec.format(number).length)
}
}
它不工作..EditText更改为新字符串的部分仍有错误separators@PaulAsiimweTumwesigye我已经完全测试过,System.out.println(formatAmount(1234))
将给出输出1234谢谢你是的,我用System.out.println尝试了它,它输出了格式化的double,我的问题是,在我的android editText中,数字没有改变,只是在试图改变它时出错。@PaulasimWetumWesigye,StackOverflow error,对,是的,我创建了一个演示应用程序,得到了相同的结果,等等,我我会返回解决方案。您必须删除TextWatcher进行编辑,然后再添加它。如果我希望用户能够像这样输入数字:“1234.05”df=new DecimalFormat(“#,#,##.###”)
此格式不允许逗号后加零,但如果我将其更改为df=new DecimalFormat(“#,#0”)
它会在逗号后自动添加零。好吧,你可以添加另一个状态,比如“IsFractalPartThere”,然后用dfdot=new DecimalFormat(“#,####.”)解析它;
但是如果你需要更高的精度“100.000005”,你会怎么做呢?如何将数字设置为1.000、1.000.000或1.000.000.000?没有通用格式可以添加千个分隔符,但保留小数不变吗?它在第15个字母后添加了000个输入。发生了什么事?这段代码很有效,但如果人们想理解它,而不是像猴子一样复制粘贴它,那就太糟糕了。变量名,如v、n、cp不是优秀程序员的标志。您可以使用此链接。当您需要数字格式的货币符号时,此链接非常有用。只需在fun EditText.text()=this.text.toString()上更改为fun EditText.text(输入:String)=GetCommalesNumber(this.text.toString())所以,当您想要在任何位置获取文本时,它将返回整数,而不进行格式化
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;
import java.text.DecimalFormat;
public class MyNumberWatcher_3Digit implements TextWatcher {
private EditText editText;
private int digit;
public MyNumberWatcher_3Digit(EditText editText) {
this.editText = editText;
}
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
editText.removeTextChangedListener( this );
String s = editText.getText().toString();
s = s.replace( ",", "" ).replace( "٬", "" );
s = replaceNonstandardDigits( s );
if (s.length() > 0) {
DecimalFormat sdd = new DecimalFormat( "#,###" );
Double doubleNumber = Double.parseDouble( s );
String format = sdd.format( doubleNumber );
editText.setText( format );
editText.setSelection( format.length() );
}
editText.addTextChangedListener( this );
}
static String replaceNonstandardDigits(String input) {
if (input == null || input.isEmpty()) {
return input;
}
StringBuilder builder = new StringBuilder();
for (int i = 0; i < input.length(); i++) {
char ch = input.charAt( i );
if (isNonstandardDigit( ch )) {
int numericValue = Character.getNumericValue( ch );
if (numericValue >= 0) {
builder.append( numericValue );
}
} else {
builder.append( ch );
}
}
return builder.toString();
}
private static boolean isNonstandardDigit(char ch) {
return Character.isDigit( ch ) && !(ch >= '0' && ch <= '9');
}
}
input_text_rate.addTextChangedListener(new MyNumberWatcher_3Digit(input_text_rate));
val et = dialog.findViewById(R.id.etNumber) as EditText
et.addTextChangedListener(object : TextWatcher {
override fun afterTextChanged(s: Editable) {
et.removeTextChangedListener(this)
forChanged(et)
et.addTextChangedListener(this)
}
override fun beforeTextChanged(
s: CharSequence,
start: Int,
count: Int,
after: Int
) {
}
override fun onTextChanged(s: CharSequence, start: Int, before: Int, count: Int) {
}
})
private fun forChanged(alpha: EditText) {
val string = alpha.text.toString()
val dec = DecimalFormat("#,###")
if (!TextUtils.isEmpty(string)) {
val textWC = string.replace(",".toRegex(), "")
val number = textWC.toDouble()
alpha.setText(dec.format(number))
alpha.setSelection(dec.format(number).length)
}
}