Use the Lottie framework to achieve the interactive animation effect in the Java library
Use the Lottie framework to achieve the interactive animation effect in the Java library
Lottie is a cross -platform animation library by Airbnb open source. It supports exporting Adobe After Effects animation into JSON format and has high performance in mobile applications.This article will introduce how to use the Lottie framework to achieve the interactive animation effect in the Java class library.
Lottie's function is very powerful. It can help us use complex interactive animations in the application without writing a lot of code.Below we will start with how to import the Lottie library to gradually introduce how to create and use animation.
The first step is to introduce the Lottie library in the Java project.We can add the following dependencies to the project's gradle file:
implementation 'com.airbnb.android:lottie:3.7.0'
Next, we need to import our animation files into the project.You can download the animated files in json format from the official website (https://lottiefiles.com/).Save the animation files under the ASSETS folder of the project.
Now, we are ready to use Lottie animation in the Java class.The following is a simple use of Lottie's example code:
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import com.airbnb.lottie.LottieAnimationView;
public class MainActivity extends AppCompatActivity {
private LottieAnimationView animationView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
animationView = findViewById(R.id.animation_view);
animationView.setAnimation("your_animation.json");
animationView.playAnimation();
animationView.loop(true);
}
@Override
protected void onPause() {
super.onPause();
animationView.cancelAnimation();
}
}
In the above code, we created a LotTieanimationView instance and specified our animation files through the Setanimation method.Then, we play animation through the Playanimation method, and we can also set the animation cycle by calling the loop method.
Finally, remember to cancel animation playback in the life cycle method of Activity.
At this point, we have successfully used the Lottie framework in the Java library to achieve the interactive animation effect.
To sum up, this article introduces how to use the Lottie framework to achieve the interactive animation effect in the Java class library.By importing the Lottie library, imported animation files, and corrected LottieanimationView in the Java class to achieve animation playback and control.Using the Lottie framework, we can easily achieve various animation effects in the Java project and improve the user experience.
