Android Studio, How to

Quick Tip – How to have an EditText which takes only numbers ?

Hello ! I’m Xavier Jouvenot and in this small post, I am going to explain how to create an EditText which takes only numbers.

Self promotion: You can find other articles on Android development on my website 😉

Numbers only by default

To make sure that a user only enter numbers in an EditText, there are several solutions. And the first one we are going to see is to specify that the EditText should only take numbers by default.

To do so, we are going to modify the EditText XML definition, and add one attribute to it. This attribute is android:inputType and can be set to a lot of different values depending on what you need. Here is a [link to the documentation](android:inputType documentation) if you want to learn more about them. This attribute is in fact a TextView attribute, but since EditText inherits from TextView, then it works.

Here is how an EditText XML definition looks like, when you want to allow only numbers:

<EditText
    <!--Some attributes-->

    android:inputType="number"

    <!--Some other attributes --> />

If not specified, this attribute is set to text for an EditText.

Modifying the input type dynamically

Specifying the attribute in the XML is great! But if you want to modify the style of a EditText or a TextView while the program is running, then, you must use some Java code and the method setRawInputType. Here is how it looks like:

EditText et = findViewById(R.id.my_edit_text_id);
et.setRawInputType(InputType.TYPE_CLASS_NUMBER);

If you want to know what other option you can pass to setRawInputType, I encourage you to look at the InputType documentation.


Thank you all for reading this article, And until my next article, have an splendid day 😉

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