Created
August 20, 2018 22:50
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package com.blehr.datepickerexample; | |
import android.text.Editable; | |
import android.text.TextWatcher; | |
import java.util.Locale; | |
public class DateMask implements TextWatcher { | |
private static final int MAX_LENGTH = 8; | |
private static final int MIN_LENGTH = 2; | |
private String updatedText; | |
private boolean editing; | |
@Override | |
public void beforeTextChanged(CharSequence charSequence, int start, int before, int count) { | |
} | |
@Override | |
public void onTextChanged(CharSequence text, int start, int before, int count) { | |
if (text.toString().equals(updatedText) || editing) return; | |
String digits = text.toString().replaceAll("\\D", ""); | |
int length = digits.length(); | |
if (length <= MIN_LENGTH) { | |
updatedText = digits; | |
return; | |
} | |
if (length > MAX_LENGTH) { | |
digits = digits.substring(0, MAX_LENGTH); | |
} | |
if (length <= 4) { | |
String month = digits.substring(0, 2); | |
String day = digits.substring(2); | |
updatedText = String.format(Locale.US, "%s/%s", month, day); | |
} | |
else { | |
String month = digits.substring(0, 2); | |
String day = digits.substring(2, 4); | |
String year = digits.substring(4); | |
updatedText = String.format(Locale.US, "%s/%s/%s", month, day, year); | |
} | |
} | |
@Override | |
public void afterTextChanged(Editable editable) { | |
if (editing) return; | |
editing = true; | |
editable.clear(); | |
editable.insert(0, updatedText); | |
editing = false; | |
} | |
} |
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