An OTP View or PinView in android is a widget that allows users to enter their PIN, OTP, etc. They are generally used for two-factor authentication or phone number verification by OTP. A sample video is given below to get an idea about what we are going to do in this article.
Note: In order to implement OtpView, Android 4.1+ (API 16) must be used.
Step-by-Step Implementation
Step 1: Create a new project in Android Studio and select Java as the language. If you are new to Android refer to How to Create/Start a New Project in Android Studio.
Step 2: Navigate to Gradle Scripts > settings.gradle(Project Setting) and add the MavenCentral inside repositories in dependencyResolutionManagement {}.
allprojects {
repositories {
…
mavenCentral()
}
}
Step 3: Navigate to the Gradle Scripts > build.gradle(Module:app) and add the below dependency in the dependencies section.
implementation ‘io.github.chaosleung:pinview:1.4.4’
Now update compileSdk version and targetSdk to 33 and Sync the project by clicking on Sync Now option appearing in the top right corner.
android {
compileSdk 33defaultConfig {
……targetSdk 33
}
Step 4: Navigate to the app > res > layout > activity_main.xml and add the below code to that file.
XML
<?xml version="1.0" encoding="utf-8"?><androidx.constraintlayout.widget.ConstraintLayout android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" android:layout_marginTop="30dp" android:layout_marginLeft="30dp" android:layout_marginRight="30dp"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="OTPView " android:textSize="30sp" android:textStyle="bold" app:layout_constraintTop_toTopOf="parent" app:layout_constraintRight_toRightOf="parent" app:layout_constraintLeft_toLeftOf="parent"/> <com.chaos.view.PinView android:id="@+id/pinview" app:itemCount="6" app:itemWidth="50dp" app:itemHeight="50dp" android:gravity="center" android:layout_marginTop="60dp" android:layout_width="wrap_content" android:layout_height="wrap_content" android:itemBackground="@color/white" android:layout_gravity="center" android:inputType="number" android:cursorVisible="true" app:hideLineWhenFilled="false" app:itemRadius="10dp" style="@style/PinWidget.PinView" app:layout_constraintRight_toRightOf="parent" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintTop_toTopOf="parent" ></com.chaos.view.PinView> <Button android:id="@+id/show_otp" android:layout_width="140dp" android:layout_height="60dp" android:text="Show OTP" app:layout_constraintTop_toBottomOf="@+id/pinview" app:layout_constraintLeft_toLeftOf="parent" app:layout_constraintRight_toRightOf="parent" android:layout_marginTop="20dp" ></Button> </androidx.constraintlayout.widget.ConstraintLayout> |
Step 5: Go to the MainActivity.java file and refer to the following code. Below is the code for the MainActivity.java file.
Java
package com.example.otp; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.Toast; import com.chaos.view.PinView; public class MainActivity extends AppCompatActivity { PinView pinView; Button button; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // hookers (binding view) pinView=findViewById(R.id.pinview); button=findViewById(R.id.show_otp); // setting onClickListener on Button button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { // getting the PinView data String otp=pinView.getText().toString(); // Toast to show the OTP Data Toast.makeText(MainActivity.this, otp, Toast.LENGTH_SHORT).show(); } }); }} |
Output:
