Is there a way I can specify an input mask to the EditText control in Android?
I want be able to specify something like ### - ## - #### for a Social Security Number. This will cause any invalid input to be rejected automatically (example, I type alphabetical characters instead of numeric digits).
I realize that I can add an OnKeyListener and manually check for validity. But this is tedious and I will have to handle various edge cases.
Try using an InputFilter
rather than an OnKeyListener
. This means you don't have worry about tracking individual key presses and it will also handle things like pasting into a field which would be painful to handle with an OnKeyListener
.
You could have a look at the source of the InputFilter
implementations that come with Android to give you a starting point for writing your own.
The easiest way I know to use a mask on EditText in your Android programs in Android Studio is to use MaskedEditText
library (GitHub link).
It's a kind of custom EditText with Watcher that allows you to set a hint with different color (if you want it will be available even when user already started to type), mask and it's very easy to use :-)
compile 'ru.egslava:MaskedEditText:1.0.5'
<br.com.sapereaude.maskedEditText.MaskedEditText
android:id="@+id/phone_input"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:inputType="phone"
android:typeface="monospace"
mask:allowed_chars="1234567"
mask:mask="###-##-##"
app:keep_hint="true"
/>
And that is!
You could take a look at the android.telephony.PhoneNumberFormattingTextWatcher class. It masks a phone number text input with the ###-###-#### pattern.
String phoneNumber = "1234567890";
String text = String.valueOf( android.telephony.PhoneNumberUtils.formatNumber(phoneNumber) ); //formatted: 123-456-7890
editTextMobile.setText(text); //set editText text equal to new formatted number
editTextMobile.setSelection(text.length()); //move cursor to end of editText view
Use this in an onKey
function for delicious on-the-fly bunny sex with formatted phone numbers.
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