问题
I've an edittext
, it only gets numeric without decimal numbers.
android:inputType="number"
I want to separate thousands while I'm typing . For example 25,000 .
I know I should use TextWatcher
and I've used this code but I couldn't make it work :
@Override
public void afterTextChanged(Editable viewss) {
String s = null;
try {
// The comma in the format specifier does the trick
s = String.format("%,d", Long.parseLong(viewss.toString()));
} catch (NumberFormatException e) {
}
}
Could you help me to do so ?
回答1:
Test this example:
import java.text.DecimalFormat;
import java.text.ParseException;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;
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";
@Override
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);
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after)
{
}
@Override
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;
}
}
}
To use it, add a TextChangedListener to the EditText component.
editText.addTextChangedListener(new NumberTextWatcher(editText));
回答2:
add this into your app's Gradle compile 'com.aldoapps:autoformatedittext:0.9.3' in XML xmlns:app="http://schemas.android.com/apk/res-auto"
<com.aldoapps.autoformatedittext.AutoFormatEditText
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:isDecimal="true"
android:maxLength="8"
android:id="@+id/number"/>
This lib automatically add (,) (.)
回答3:
DecimalFormat formatter = new DecimalFormat("#,###,###");
String yourFormattedString = formatter.format(100000);
Use DecimalFormat
来源:https://stackoverflow.com/questions/28757931/how-to-format-the-input-of-edittext-when-typing-with-thousands-separators-in