How to create a Lottie Alert Dialog in Java

Creating a Lottie Alert Dialog in Java typically involves several steps. First, ensure that the Lottie library is added to your Android project, and then use it to display animations within the dialog. Below, I will detail the entire process:

1. Adding the Lottie Library Dependency

Before writing code, verify that the Lottie dependency is included in your build.gradle (Module: app) file. Add it as follows:

gradle
dependencies {
    implementation 'com.airbnb.android:lottie:3.4.0'
}

After syncing Gradle, proceed to create the Lottie Alert Dialog.

2. Creating the Layout File

First, create an XML layout file, such as lottie_alert_dialog.xml, to define the dialog's appearance. This layout must include at least one LottieAnimationView to play the animation.

xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:padding="16dp">

    <com.airbnb.lottie.LottieAnimationView
        android:id="@+id/lottieAnimationView"
        android:layout_width="300dp"
        android:layout_height="300dp"
        app:lottie_autoPlay="true"
        app:lottie_loop="true"
        app:lottie_fileName="loading_animation.json" />

    <!-- Additional components can be added, such as a TextView for displaying messages -->
</LinearLayout>

3. Using the Layout in an Activity

In your Activity, use AlertDialog.Builder with the previously created layout file to implement the Lottie Alert Dialog:

java
import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.view.LayoutInflater;

public class MainActivity extends Activity {

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

        showLottieAlertDialog();
    }

    private void showLottieAlertDialog() {
        // Inflate the layout and initialize components
        LayoutInflater inflater = getLayoutInflater();
        View view = inflater.inflate(R.layout.lottie_alert_dialog, null);

        AlertDialog.Builder alertBuilder = new AlertDialog.Builder(this);
        alertBuilder.setView(view);
        alertBuilder.setCancelable(false); // Dialog does not dismiss when clicked outside

        AlertDialog dialog = alertBuilder.create();
        dialog.show();
    }
}

4. Customization and Control

You can control animation playback, such as playing or pausing, by accessing the LottieAnimationView instance:

java
LottieAnimationView animationView = view.findViewById(R.id.lottieAnimationView);
animationView.playAnimation();

5. Using Animation Files

Ensure the required Lottie animation file (e.g., loading_animation.json) is placed in the assets directory. This allows the Lottie library to locate and play it.

By following these steps, you can create and display a Lottie Alert Dialog with animations in your Android application. This approach is ideal for enhancing user experience, especially during loading processes.