Question

I am new to Android development. In my project, I’m using EditText, but I want to force it to only accept an integer or float value. How can I do that?

Answer 1

If you want to use Decimal Number only on your EditText

use the xml attribute android:inputType="numberDecimal" in your EditText widget
your EditText declaration will be like this:

<EditText
    android:id="@+id/editText1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:inputType="numberDecimal" />

If you want to use Signed Decimal Number than combine the two Xml attributes android:inputType="numberDecimal" and android:inputType="numberSigned". Your EditText declaration will be like this:

<EditText
    android:id="@+id/editText1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:ems="10"
    android:inputType="numberDecimal|numberSigned" >

</EditText>