QR Code & Barcode Scanner For Android With Admob

Introduction

In today's digital age, QR codes and barcodes have become an essential part of our daily lives. From shopping to entertainment, these codes are used to provide quick and easy access to information, services, and products. Android devices have made it easy to scan these codes using various apps. In this tutorial, we will explore how to create a QR code and barcode scanner app for Android with AdMob integration.

What is AdMob?

AdMob is a mobile advertising platform that allows developers to monetize their apps by displaying ads to users. AdMob provides a range of ad formats, including banner ads, interstitial ads, and rewarded videos. By integrating AdMob into your app, you can earn revenue from the ads displayed to your users.

What is QR Code & Barcode Scanner?

A QR code and barcode scanner app is a utility app that allows users to scan QR codes and barcodes using their Android device's camera. The app can be used to scan various types of codes, including QR codes, PDF417 codes, Data Matrix codes, and more. The scanned data can be used to access information, make payments, or redeem rewards.

Tutorial: Creating a QR Code & Barcode Scanner App for Android with AdMob

In this tutorial, we will create a QR code and barcode scanner app for Android with AdMob integration. We will use the ZXing library to scan QR codes and barcodes, and AdMob to display ads in our app.

Step 1: Create a New Android Project

Open Android Studio and create a new project. Choose "Empty Activity" as the project template, and name your project "QRCodeScanner".

Step 2: Add the ZXing Library

Add the ZXing library to your project by adding the following dependency to your app's build.gradle file:

dependencies {
    implementation 'com.google.zxing:core:3.4.0'
}

Step 3: Design the User Interface

Create a new layout file called "activity_main.xml" and add the following code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:id="@+id/tv_result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="24sp"
        android:textStyle="bold" />

    <Button
        android:id="@+id/btn_scan"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Scan" />

    <AdView
        android:id="@+id/adView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dp"
        android:layout_marginBottom="10dp" />

</LinearLayout>

This layout includes a text view to display the scanned result, a button to trigger the scan, and an AdView to display AdMob ads.

Step 4: Write the Scan Code

Create a new Java class called "MainActivity.java" and add the following code:

import android.os.Bundle;
import android.view.View;
import android.widget.TextView;
import android.widget.Toast;

import androidx.appcompat.app.AppCompatActivity;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.DecodeHintType;
import com.google.zxing.ResultPoint;
import com.google.zxing.client.android.CaptureActivity;
import com.google.zxing.client.android.Intents;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private TextView tvResult;
    private Button btnScan;
    private AdView adView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        tvResult = findViewById(R.id.tv_result);
        btnScan = findViewById(R.id.btn_scan);
        adView = findViewById(R.id.adView);

        btnScan.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent intent = new Intent(Intents.Scan.ACTION);
                intent.setPackage(getPackageName());
                startActivityForResult(intent, 0);
            }
        });

        adView.loadAd(new AdRequest.Builder().build());
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);
        if (resultCode == RESULT_OK) {
            String result = intent.getStringExtra(Intents.Scan.RESULT);
            tvResult.setText(result);
        }
    }
}

This code creates a new instance of the CaptureActivity, which is responsible for scanning the QR code or barcode. The scanned result is then displayed in the text view.

Step 5: Add AdMob Integration

Add the following code to your app's build.gradle file to integrate AdMob:

dependencies {
    implementation 'com.google.android.gms:play-services-ads:20.2.0'
}

Then, add the following code to your MainActivity.java file to load AdMob ads:

adView.loadAd(new AdRequest.Builder().build());

Step 6: Test the App

Run the app on your Android device and test the QR code and barcode scanning functionality. You should see the scanned result displayed in the text view. Also, you should see AdMob ads displayed in the app.

Conclusion

In this tutorial, we have created a QR code and barcode scanner app for Android with AdMob integration. We have used the ZXing library to scan QR codes and barcodes, and AdMob to display ads in our app. With this app, users can scan various types of codes and access information, make payments, or redeem rewards.