在Android中使用千位分隔符(,)键入时如何格式化EditText的input?

我有一个edittext ,它只能得到没有十进制数字的数字。

 android:inputType="number" 

我打字的时候要分开数千个。 例如25,000。

我知道我应该使用TextWatcher ,我已经使用这个代码,但我不能让它工作:

 @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) { } } 

你能帮我这么做吗?

Related of "在Android中使用千位分隔符(,)键入时如何格式化EditText的input?"

testing这个例子:

 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; } } } 

要使用它,请向EditText组件添加一个TextChangedListener。

 editText.addTextChangedListener(new NumberTextWatcher(editText));