How to implement google tag manager in android app?

@pietro 

To implement Google Tag Manager in an Android app, follow these steps:

1. Create a Google Tag Manager container: Go to the Google Tag Manager website (https://tagmanager.google.com/) and create a new container for your app.
2. Set up the container in your app: In your project's build.gradle file, add the following dependencies:

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dependencies {
    implementation 'com.google.android.gms:play-services-tagmanager:<latest_version>'
}

1. Add required permissions: In the app's AndroidManifest.xml file, add the following permissions:

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<uses-permission android:name="android.permission.INTERNET" />

1. Add container resource file: Create a XML file in the res/xml folder (e.g., gtm.xml) and add the following code:

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<?xml version="1.0" encoding="utf-8"?>
<resource>
    <string name="container_id">YOUR_CONTAINER_ID</string>
</resources>

Replace YOUR_CONTAINER_ID with the container ID you obtained from the Google Tag Manager website.

1. Initialize Google Tag Manager: In your app's main application class (extend Application), add the following code:

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import com.google.android.gms.tagmanager.DataLayer;
import com.google.android.gms.tagmanager.TagManager;

public class MyApplication extends Application {
    private TagManager tagManager;
    private DataLayer dataLayer;

    public void onCreate() {
        super.onCreate();
        tagManager = TagManager.getInstance(this);
        tagManager.setVerboseLoggingEnabled(true);
        dataLayer = tagManager.getDataLayer();
        dataLayer.pushEvent("appLaunch", DataLayer.mapOf("event", "appLaunch"));
    }

    public TagManager getTagManager() {
        return tagManager;
    }

    public DataLayer getDataLayer() {
        return dataLayer;
    }
}

Be sure to update the container ID and enable/disable verbose logging as needed.

1. Add GTM snippet to your app's layout files (optional): In your XML layout files, add the following snippet where you want your GTM tags to be placed:

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<TextView
    ...
    android:text="@string/container_id"
    android:tag="GTM-YOUR_CONTAINER_ID"
    ... />

Replace YOUR_CONTAINER_ID with your container ID.

1. Add a container loaded listener (optional): If you want to be notified when the container is successfully loaded, you can add a listener:

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tagManager.setContainerLoadedListener(new ContainerLoadedCallback());

1. Build and run your app: After implementing the above steps, build and run your app to ensure the Google Tag Manager is successfully integrated.

Note: It is recommended to thoroughly read through Google's official documentation for more detailed information on implementing and using Google Tag Manager in your Android app.