Implement Phone Number Validator in Android

Phone validation is useful for users to check whether the number entered by the user is a valid number or not. If the user has entered the number is not valid then it will show a Toast message to re-enter the number. In this article, we are going to discuss how to implement the phone number validator in Android step by step. A sample video is given below to get an idea about what we are going to do in this article.

Note: This Android article covered in both Java and Kotlin languages.

Step by Step Implementation

Step 1: Create a New Project in Android Studio

To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. The code for that has been given in both Java and Kotlin Programming Language for Android.

Step 2: Working with activity_main.xml

Navigate to the app > res > layout > activity_main.xml and add the below code to that file. Below is the code for the activity_main.xml file.