Animate activity sliding right to left.

MySlideActivity.kt

class MySlideActivity: AppCompatActivity(){
 
  	override fun onCreate(savedInstanceState: Bundle?) {
		super.onCreate(savedInstanceState)
		setupWindowSlideTransitions(window, resources)
	}

	override fun onCreate(savedInstanceState: Bundle?, persistentState: PersistableBundle?) {
		super.onCreate(savedInstanceState, persistentState)
		setupWindowSlideTransitions(window, resources)
	} 
	
	/**
	 * setupWindowSlideTransition must be called before adding content!
	 *
	 * Using Gravity.START is a problem that crashes on API 21 devices.
	 * The reason is that the initial version of Slide in API 21 only supports LEFT,TOP,RIGHT and BOTTOM gravity's.
	 * That's why here is used GravityCompat for that.
	 */
	fun setupWindowSlideTransitions(window: Window, resources: Resources) {
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
			//request transition here, or in AndroidManifest.xml
			window.requestFeature(Window.FEATURE_CONTENT_TRANSITIONS)
			window.exitTransition = Slide(GravityCompat.getAbsoluteGravity(GravityCompat.START, resources.configuration.layoutDirection)).excludeTarget(Window.NAVIGATION_BAR_BACKGROUND_TRANSITION_NAME, true)
			window.enterTransition = Slide(GravityCompat.getAbsoluteGravity(GravityCompat.END, resources.configuration.layoutDirection)).excludeTarget(Window.NAVIGATION_BAR_BACKGROUND_TRANSITION_NAME, true)
		}
	}
}

StartActivity.kt

const val REQUEST_NEXT_STEP: Int = 20

class MySlideActivity: AppCompatActivity(){
  override fun onClick() {
		startForResultAnimate<MySlideActivity>(REQUEST_NEXT_STEP)
	}
}

TransitionUtility.kt

import android.content.res.Resources
import android.os.Build
import android.support.v4.view.GravityCompat
import android.transition.Slide
import android.view.Window

/**
 * setupWindowSlideTransition must be called before adding content!
 *
 * Using Gravity.START is a problem that crashes on API 21 devices.
 * The reason is that the initial version of Slide in API 21 only supports LEFT,TOP,RIGHT and BOTTOM gravity's.
 * That's why here is used GravityCompat for that.
 */
fun setupWindowSlideTransitions(window: Window, resources: Resources) {
	if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
		//request transition here, or in AndroidManifest.xml
		window.requestFeature(Window.FEATURE_CONTENT_TRANSITIONS)
		window.exitTransition = Slide(GravityCompat.getAbsoluteGravity(GravityCompat.START, resources.configuration.layoutDirection)).excludeTarget(Window.NAVIGATION_BAR_BACKGROUND_TRANSITION_NAME, true)
		window.enterTransition = Slide(GravityCompat.getAbsoluteGravity(GravityCompat.END, resources.configuration.layoutDirection)).excludeTarget(Window.NAVIGATION_BAR_BACKGROUND_TRANSITION_NAME, true)
	}
}

UtilityActivity.kt

import android.annotation.TargetApi
import android.app.Activity
import android.content.Intent
import android.content.pm.ActivityInfo
import android.os.Build
import android.support.annotation.ColorInt
import android.support.annotation.ColorRes
import android.support.v4.app.ActivityOptionsCompat
import android.support.v4.content.ContextCompat
import android.view.View
import android.view.WindowManager

inline fun <reified A : Activity> Activity.startForResultAnimate(requestCode: Int) = startActivityForResult(Intent(this, A::class.java), requestCode, ActivityOptionsCompat.makeSceneTransitionAnimation(this).toBundle())
inline fun <reified A : Activity> Activity.startForResultAnimate(requestCode: Int, config: Intent.() -> Unit) = startActivityForResult(Intent(this, A::class.java).apply(config), requestCode, ActivityOptionsCompat.makeSceneTransitionAnimation(this).toBundle())