Author: oraculum

package lethus.socialdroid.core.widgets;
 
import android.content.Context;
import android.text.Editable;
import android.text.InputType;
import android.text.TextWatcher;
import android.text.method.NumberKeyListener;
import android.util.AttributeSet;
import android.widget.EditText;
 
public class CpfEditText extends EditText {
	private boolean isUpdating;
 
	/*
	 * Maps the cursor position from phone number to masked number... 12345678912
	 * => xxx.xxx.xxx-xx
	 */
	private int positioning[] = { 0, 1, 2, 3, 5, 6, 7, 9, 10, 11, 13, 14 };
 
	public CpfEditText(Context context, AttributeSet attrs, int defStyle) {
		super(context, attrs, defStyle);
		initialize();
 
	}
 
	public CpfEditText(Context context, AttributeSet attrs) {
		super(context, attrs);
		initialize();
 
	}
 
	public CpfEditText(Context context) {
		super(context);
		initialize();
 
	}
 
	public String getCleanText() {
		String text = CpfEditText.this.getText().toString();
 
		text.replaceAll("[^0-9]*", "");
		return text;
 
	}
 
	private void initialize() {
 
		final int maxNumberLength = 11;
		this.setKeyListener(keylistenerNumber);
 
		this.setText("     -   ");
		this.setSelection(1);
 
		this.addTextChangedListener(new TextWatcher() {
			public void afterTextChanged(Editable s) {
				String current = s.toString();
 
				/*
				 * Ok, here is the trick... calling setText below will recurse
				 * to this function, so we set a flag that we are actually
				 * updating the text, so we don't need to reprocess it...
				 */
				if (isUpdating) {
					isUpdating = false;
					return;
 
				}
 
				/* Strip any non numeric digit from the String... */
				String number = current.replaceAll("[^0-9]*", "");
				if (number.length() > 11)
					number = number.substring(0, 11);
				int length = number.length();
 
				/* Pad the number to 10 characters... */
				String paddedNumber = padNumber(number, maxNumberLength);
 
				/* Split phone number into parts... */
				String part1 = paddedNumber.substring(0, 3);
				String part2 = paddedNumber.substring(3, 6);
				String part3 = paddedNumber.substring(6, 9);
				String part4 = paddedNumber.substring(9, 11);
 
				/* build the masked phone number... */
				String cpf = part1 + "." + part2 + "." + part3 + "-" + part4;
 
				/*
				 * Set the update flag, so the recurring call to
				 * afterTextChanged won't do nothing...
				 */
				isUpdating = true;
				CpfEditText.this.setText(cpf);
 
				CpfEditText.this.setSelection(positioning[length]);
 
			}
 
			public void beforeTextChanged(CharSequence s, int start, int count,
					int after) {
 
			}
 
			public void onTextChanged(CharSequence s, int start, int before,
					int count) {
 
			}
		});
	}
 
	protected String padNumber(String number, int maxLength) {
		String padded = new String(number);
		for (int i = 0; i < maxLength - number.length(); i++)
			padded += " ";
		return padded;
 
	}
 
	private final KeylistenerNumber keylistenerNumber = new KeylistenerNumber();
 
	private class KeylistenerNumber extends NumberKeyListener {
 
		public int getInputType() {
			return InputType.TYPE_CLASS_NUMBER
					| InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS;
 
		}
 
		@Override
		protected char[] getAcceptedChars() {
			return new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8',
					'9' };
 
		}
	}
}

<lethus.socialdroid.core.widgets.CpfEditText android:id="@+id/txtCpf" android:layout_width="match_parent" android:layout_height="wrap_content" android:inputType="number" />