Masked Input Using EditText Widget in Android

问题:

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.

Buzzy

回答1:

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.

回答2:

You could take a look at the android.telephony.PhoneNumberFormattingTextWatcher class. It masks a phone number text input with the ###-###-#### pattern.

回答3:

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.

回答4:

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!

回答5:

This site gives a good 2 classes that help with masking that I found quite useful.

You need to use the items in the comments to improve it. But worth adding to your program for ease of masking your EditText views for many masks.

回答6:

you can use this efect in EditText