[Android] CurrencyTextWatcher

readme.txt

Usage:

txtValor.addTextChangedListener(new CurrencyTextWatcher(txtValor));

Currency.java

public class Currency {
 
	public static String toString(double value) {
		DecimalFormat formatter = (DecimalFormat) NumberFormat.getCurrencyInstance();
		DecimalFormatSymbols symbols = formatter.getDecimalFormatSymbols();
		symbols.setCurrencySymbol("");
		formatter.setDecimalFormatSymbols(symbols);
		return formatter.format(value);
	}
 
	public static String toString(String value) {
		double parsed = Double.parseDouble(value);
		return Currency.toString(parsed);
	}
 
	public static double toDouble(String strValue) {
		String cleanString = strValue.replaceAll("[,.]", "");
		return Double.parseDouble(cleanString)/100;
	}
}

CurrencyTextWatcher.java

public class CurrencyTextWatcher implements TextWatcher {
	private String current = "";
	EditText editText;

	public CurrencyTextWatcher(EditText editText) {
		this.editText = editText;
	}

	@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().equals(current)){
			editText.removeTextChangedListener(this);

			double parsed = Currency.toDouble(s.toString());
			String formatted = Currency.toString(parsed);
			current = formatted;
			editText.setText(formatted);
			editText.setSelection(formatted.length());

			editText.addTextChangedListener(this);
		}
	}

	@Override
	public void afterTextChanged(Editable s) {

	}
}