Android Jetpack Compose – Implement Google AdMob Banners Ads

Last Updated : 23 Jan, 2023

Banner ads are rectangular images or text ads that occupy a spot within an app’s layout. If you’re new to mobile advertising, banner ads are the easiest to implement. This article shows you how to integrate banner ads from AdMob into our android application using Jetpack Compose. A sample image is given below displaying Google AdMob Banners Ads.

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. While choosing the template, select Empty Compose Activity. If you do not find this template, try upgrading the Android Studio to the latest version. We demonstrated the application in Kotlin, so make sure you select Kotlin as the primary language while creating a New Project.

Step 2: Adding a new color in the Color.kt file

Navigate to app > java > your app’s package name > ui.theme > Color.kt file and add the code below.

Kotlin

package com.example.newcanaryproject.ui.theme
 
import androidx.compose.ui.graphics.Color
 
val Purple200 = Color(0xFF0F9D58)
val Purple500 = Color(0xFF0F9D58)
val Purple700 = Color(0xFF3700B3)
val Teal200 = Color(0xFF03DAC5)
 
// on below line we are adding different colors.
val greenColor = Color(0xFF0F9D58)

Step 3: Adding dependency in build.gradle file

Navigate to app>Gradle Scripts>build.gradle file and add the below dependency to it in the dependencies section.

implementation 'com.google.android.gms:play-services-ads:20.5.0'

Sync your project after adding the dependency.

Step 4: Adding application id in AndroidManifest.xml

Navigate to app > AndroidManifest.xml file and add it before the application tag.

XML

<!-- add your application id instead of value currently added test application id-->l̥
<meta-data
  android:name="com.google.android.gms.ads.APPLICATION_ID"
  android:value="ca-app-pub-3940256099942544~3347511713" />\

Step 5: Working with the MainActivity.kt file

Go to the MainActivity.kt file and refer to the following code. Below is the code for the MainActivity.kt file. Comments are added inside the code to understand the code in more detail.

Kotlin

package com.example.newcanaryproject
 
import android.content.ActivityNotFoundException
import android.content.Context
import android.content.Intent
import android.net.Uri
import android.os.Bundle
import androidx.activity.ComponentActivity
import androidx.activity.compose.setContent
import androidx.compose.foundation.background
import androidx.compose.foundation.layout.*
import androidx.compose.material.*
import androidx.compose.runtime.Composable
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier
import androidx.compose.ui.graphics.Color
import androidx.compose.ui.graphics.Color.Companion.Red
import androidx.compose.ui.platform.LocalContext
import androidx.compose.ui.platform.LocalInspectionMode
import androidx.compose.ui.text.TextStyle
import androidx.compose.ui.text.font.FontWeight
import androidx.compose.ui.text.style.TextAlign
import androidx.compose.ui.unit.dp
import androidx.compose.ui.unit.sp
import androidx.compose.ui.viewinterop.AndroidView
import androidx.core.content.ContextCompat.startActivity
import com.example.newcanaryproject.ui.theme.NewCanaryProjectTheme
import com.example.newcanaryproject.ui.theme.greenColor
import com.google.android.gms.ads.AdRequest
import com.google.android.gms.ads.AdSize
import com.google.android.gms.ads.AdView
 
class MainActivity : ComponentActivity() {
 
    override fun onCreate(savedInstanceState: Bundle?) {
 
        super.onCreate(savedInstanceState)
        setContent {
            NewCanaryProjectTheme {
                // on below line we are specifying background color for our application
                Surface(
                    // on below line we are specifying modifier and color for our app
                    modifier = Modifier.fillMaxSize(), color = MaterialTheme.colors.background
                ) {
 
                    // on the below line we are specifying
                    // the theme as the scaffold.
                    Scaffold(
 
                        // in scaffold we are specifying the top bar.
                        topBar = {
 
                            // inside top bar we are specifying background color.
                            TopAppBar(backgroundColor = greenColor,
 
                                // along with that we are specifying 
                                // title for our top bar.
                                title = {
 
                                    // in the top bar we are specifying tile as a text
                                    Text(
                                        // on below line we are specifying
                                        // text to display in top app bar.
                                        text = "GFG",
 
                                        // on below line we are specifying
                                        // modifier to fill max width.
                                        modifier = Modifier.fillMaxWidth(),
 
                                        // on below line we are specifying
                                        // text alignment.
                                        textAlign = TextAlign.Center,
 
                                        // on below line we are specifying
                                        // color for our text.
                                        color = Color.White
                                    )
                                })
                        }) {
                        // on below line we are calling method to display UI
                        bannersAds(LocalContext.current)
                    }
                }
            }
        }
    }
}
 
@Composable
fun bannersAds(context: Context) {
    // on below line creating a variable for location.
    // on below line creating a column for our maps.
    Column(
        modifier = Modifier
            .fillMaxHeight()
            .fillMaxWidth()
            .background(Color.White)
    ) {
        // on below line we are adding a spacer. 
        Spacer(modifier = Modifier.height(20.dp))
        // on below line we are adding a text
        Text(
            // on below line specifying text for heading.
            text = "Google Admob Banner Ads in Android",
            // adding text alignment,
            textAlign = TextAlign.Center,
            // on below line adding text color.
            color = greenColor,
            // on below line adding font weight.
            fontWeight = FontWeight.Bold,
            // on below line adding padding from all sides.
            modifier = Modifier
                .padding(10.dp)
                .fillMaxWidth()
        )
 
        // on below line adding a spacer.
        Spacer(modifier = Modifier.height(30.dp))
 
        // on below line adding admob banner ads.
        AndroidView(
            // on below line specifying width for ads.
            modifier = Modifier.fillMaxWidth(),
            factory = { context ->
                // on below line specifying ad view.
                AdView(context).apply {
                    // on below line specifying ad size
                    adSize = AdSize.BANNER
                    // on below line specifying ad unit id 
                    // currently added a test ad unit id.
                    adUnitId = "ca-app-pub-3940256099942544/6300978111"
                    // calling load ad to load our ad.
                    loadAd(AdRequest.Builder().build())
                }
            }
        )
    }
}