Create Left to Right slide animation in Android using Kotlin.

This example demonstrates how to Create Left to Right slide animation in Android using Kotlin.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:id="@+id/relativeLayout"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="8dp"
   tools:context=".MainActivity">
   <Button
      android:id="@+id/btnSlideLeft"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="30dp"
      android:text="Slide Left" />
   <Button
      android:id="@+id/btnSlideRight"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_below="@id/btnSlideLeft"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="10dp"
      android:text="Slide Right" />
   <TextView
      android:id="@+id/textView"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_centerInParent="true"
      android:text="Cristiano Ronaldo is the Best Player in the World"
      android:textSize="16sp"
      android:textStyle="bold"
      android:visibility="invisible" />
   <TextView
      android:id="@+id/textView1"
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:layout_below="@id/textView"
      android:layout_centerInParent="true"
      android:text="Messi is the Best Player in the World"
      android:textSize="16sp"
      android:textStyle="bold"
      android:visibility="invisible" />
</RelativeLayout>

Step 3 − Add the following code to src/MainActivity.kt

import android.os.Bundle
import android.transition.Slide
import android.transition.TransitionManager
import android.view.Gravity
import android.view.View
import android.widget.Button
import android.widget.RelativeLayout
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
class MainActivity : AppCompatActivity() {
   lateinit var btnSlideLeft: Button
   lateinit var btnSlideRight: Button
   lateinit var textView: TextView
   lateinit var textView1: TextView
   lateinit var relativeLayout: RelativeLayout
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      textView = findViewById(R.id.textView)
      textView1 = findViewById(R.id.textView1)
      btnSlideLeft = findViewById(R.id.btnSlideLeft)
      btnSlideRight = findViewById(R.id.btnSlideRight)
      relativeLayout = findViewById(R.id.relativeLayout)
      btnSlideLeft.setOnClickListener {
         val slide = Slide()
         slide.slideEdge = Gravity.START
         TransitionManager.beginDelayedTransition(relativeLayout, slide)
         textView.visibility = View.VISIBLE
      }
      btnSlideRight.setOnClickListener {
         val slide = Slide()
         slide.slideEdge = Gravity.END
         TransitionManager.beginDelayedTransition(relativeLayout, slide)
         textView1.visibility = View.VISIBLE
      }
   }
}

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.q11">
   <application
      android:allowBackup="true"
      android:icon="@mipmap/ic_launcher"
      android:label="@string/app_name"
      android:roundIcon="@mipmap/ic_launcher_round"
      android:supportsRtl="true"
      android:theme="@style/AppTheme">
      <activity android:name=".MainActivity">
         <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />
         </intent-filter>
      </activity>
   </application>
</manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen