Created
March 14, 2016 22:02
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Text watcher for giving "#### #### #### ####" format to edit text.
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import android.text.Editable; | |
import android.text.TextWatcher; | |
/** | |
* Text watcher for giving "#### #### #### ####" format to edit text. | |
* Created by epool on 3/14/16. | |
*/ | |
public class CreditCardFormattingTextWatcher implements TextWatcher { | |
private static final String EMPTY_STRING = ""; | |
private static final String WHITE_SPACE = " "; | |
private String lastSource = EMPTY_STRING; | |
@Override | |
public void beforeTextChanged(CharSequence s, int start, int count, int after) { | |
} | |
@Override | |
public void onTextChanged(CharSequence s, int start, int before, int count) { | |
} | |
@Override | |
public void afterTextChanged(Editable s) { | |
String source = s.toString(); | |
if (!lastSource.equals(source)) { | |
source = source.replace(WHITE_SPACE, EMPTY_STRING); | |
StringBuilder stringBuilder = new StringBuilder(); | |
for (int i = 0; i < source.length(); i++) { | |
if (i > 0 && i % 4 == 0) { | |
stringBuilder.append(WHITE_SPACE); | |
} | |
stringBuilder.append(source.charAt(i)); | |
} | |
lastSource = stringBuilder.toString(); | |
s.replace(0, s.length(), lastSource); | |
} | |
} | |
} |
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