android - Validation on Edit Text

Question

I would like to know how to make a validation on EditText. For example, I have one EditText that should only accept numeric values. If something other than a numeric value is typed by the user then it should show an alert message (i.e. "please use a numeric value....").

Is there a function available to find out if the entered text is particular type? If possible please include a code snippet.

Answer 1

Rather than make a pop-up I would integrate a hint into the EditText and I would make it so the user could only type numbers into the EditText (android:numeric, android:hint):

        <EditText android:layout_height="wrap_content"
                      android:numeric="integer"
                      android:hint="@string/numberHint"
                      android:gravity="left"
                      android:id="@+id/name" 
                      android:layout_width="wrap_content" 
                      android:maxWidth="60dp" 
                      android:textSize="6pt">
        </EditText>

More information is available here: http://developer.android.com/reference/android/widget/EditText.html