1. Head over to the Firebase Console and either start a new project or pick one you already have.
2. In your Firebase project, hit the "Add app" button and select Android.
3. Register your app with the correct package name.
4. Download the google-services.json file and drop it into the app/ directory of your Android project.
5. Add the Firebase SDK to your project by including these lines in your build.gradle files:

Project-level build.gradle:

buildscript {
    dependencies {
        classpath 'com.google.gms:google-services:4.3.10'
    }
}

App-level build.gradle:

apply plugin: 'com.google.gms.google-services'

dependencies {
    implementation platform('com.google.firebase:firebase-bom:30.0.1')
    implementation 'com.google.firebase:firebase-analytics'
    implementation 'com.google.firebase:firebase-dynamic-links'
}

1. In the Firebase Console, find the "Dynamic Links" section on the left menu.
2. Click the "Get Started" button if you haven’t already enabled Dynamic Links in your project.
3. Click "New Dynamic Link".
4. Set up the domain for the Dynamic Link. This might involve setting up custom subdomains in the Firebase Console.
5. Follow the steps to configure your Dynamic Link, including the base URL, the link behavior for both iOS and Android, and any additional parameters.

1. Open the AndroidManifest.xml file and add an intent filter to make sure your app can receive the Dynamic Link:

<activity
    android:name=".YourMainActivity">
    <intent-filter>
        <action android:name="android.intent.action.VIEW"/>
        <category android:name="android.intent.category.DEFAULT"/>
        <category android:name="android.intent.category.BROWSABLE"/>
        <data
            android:host="example.page.link"
            android:scheme="https"/>
    </intent-filter>
</activity>

1. In your main activity or the activity you want to handle the Dynamic Link, add this code to process the incoming link:

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.firebase.dynamiclinks.FirebaseDynamicLinks;
import com.google.firebase.dynamiclinks.PendingDynamicLinkData;

public class YourMainActivity extends AppCompatActivity {

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

        FirebaseDynamicLinks.getInstance()
            .getDynamicLink(getIntent())
            .addOnSuccessListener(this, new OnSuccessListener<PendingDynamicLinkData>() {
                @Override
                public void onSuccess(PendingDynamicLinkData pendingDynamicLinkData) {
                    Uri deepLink = null;
                    if (pendingDynamicLinkData != null) {
                        deepLink = pendingDynamicLinkData.getLink();
                    }

                    if (deepLink != null) {
                        // Handle the deep link. For example, open the linked content,
                        // or apply promotional credit to the user's account.
                        // ...
                    }
                }
            })
            .addOnFailureListener(this, new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    // Handle the error
                }
            });
    }

    @Override
    protected void onNewIntent(Intent intent) {
        super.onNewIntent(intent);
        setIntent(intent);
        // You might want to re-call FirebaseDynamicLinks.getDynamicLink here if necessary
    }
}

1. To create dynamic links programmatically within your app, use the Firebase Dynamic Links Builder API.
2. Add this code where appropriate in your app:

import com.google.firebase.dynamiclinks.DynamicLink;
import com.google.firebase.dynamiclinks.FirebaseDynamicLinks;

public void createDynamicLink() {
    String link = "https://www.example.com/?d=1234";
    String domainUriPrefix = "https://example.page.link";

    DynamicLink dynamicLink = FirebaseDynamicLinks.getInstance().createDynamicLink()
        .setLink(Uri.parse(link))
        .setDomainUriPrefix(domainUriPrefix)
        .setAndroidParameters(new DynamicLink.AndroidParameters.Builder().build())
        .buildDynamicLink();

    Uri dynamicLinkUri = dynamicLink.getUri();

    // Use the dynamicLinkUri, send it to others, etc.
}

This method gives you the flexibility to generate and share dynamic links directly from your app’s codebase.