How To Validate an EditText to handle numbers only in Android?

问题

How can I validate a text view in android to handle positive integer numbers?

I don't want it to accept any character or signs etc...

回答1:

Have you taken a look at the EditText's inputType attribute? You can set a whole bunch of different input types that the EditText should limit the user input to.

From the sounds of it, you're probably looking for something like:

<EditText
    ....
    android:inputType="number" 
     ... />

回答2:

You can use regular expressions. See: http://developer.android.com/reference/java/util/regex/Pattern.html

Your pattern could look like ^[0-9]{1,10}$ which means that the entered value can only consist of digits (minimum 1, maximum 10)

回答3:

IMO best way is use inputType in xml

<EditText
    ...
    android:inputType="phone" />

You have to remember that "+" is also part of the phone number.

回答4:

Use the code in your Edittext XML to restrict any range of values

android:digits="0123456789"

回答5:

You can use from XML

<EditText
    ...
    android:inputType="phone" />

or programmatically

EditText editText = (EditText) findViewById(R.id.yourId);
editText.setInputType(InputType.TYPE_CLASS_NUMBER);

来源：https://stackoverflow.com/questions/9449513/how-to-validate-an-edittext-to-handle-numbers-only-in-android