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How to add animation to activity transitions in Kotlin Android

How to add animation to activity transitions in Kotlin Android.

Here's a step-by-step tutorial on how to add animation to activity transitions in Kotlin Android:

Step 1: Set up a new Android project

Create a new Android project in Android Studio and set up the basic structure.

Step 2: Add animation resources

Create animation resources in the res/anim directory. You can define different types of animations, such as fade in, fade out, slide in, slide out, etc. Here's an example of a fade-in animation (fade_in.xml):

<alpha xmlns:android="http://schemas.android.com/apk/res/android"
android:fromAlpha="0.0"
android:toAlpha="1.0"
android:duration="500"/>

Step 3: Define transition animations

Create transition animations in the res/transition directory. These animations define how one activity transitions to another. Here's an example of a slide-in animation (slide_in.xml):

<slide xmlns:android="http://schemas.android.com/apk/res/android"
android:duration="500"
android:slideEdge="right"/>

Step 4: Set up the first activity

Open the first activity (MainActivity.kt) and add the following code to override the default transition animation:

override fun startActivity(intent: Intent?) {
super.startActivity(intent)
overridePendingTransition(R.anim.slide_in, R.anim.fade_out)
}

Step 5: Set up the second activity

Open the second activity (SecondActivity.kt) and add the following code to override the default transition animation:

override fun finish() {
super.finish()
overridePendingTransition(R.anim.fade_in, R.anim.slide_out)
}

Step 6: Test the animation

Run the app on an emulator or a physical device to see the animation in action. When you navigate from the MainActivity to the SecondActivity, the slide-in animation will be applied. And when you finish the SecondActivity and return to the MainActivity, the fade-in animation will be applied.

Step 7: Customize the animations

Feel free to customize the animation resources to achieve the desired effect. You can adjust the duration, direction, and other properties to make the transitions more visually appealing.

That's it! You have successfully added animation to activity transitions in Kotlin Android. By following these steps, you can create smooth and engaging transitions between activities in your Android app.