Show Back Stack of Android

Question

For better understanding the behavior of Android I\'d like to learn more about the back stack concept. Is there a way to list all activities as they are ordered in back stack. T

Answer 1

For the back stack of your own app, you can write your own solution using Application.ActivityLifecycleCallbacks:

class MyApp : Application() {
   
   override fun onCreate() {
      super.onCreate()
      ActivityBackStackTracker.install(this)
   }
}

class ActivityBackStackTracker : Application.ActivityLifecycleCallbacks {

    override fun onActivityCreated(activity: Activity, bundle: Bundle?) {
        activityStack.add(activity::class)
    }

    override fun onActivityDestroyed(activity: Activity) {
        activityStack.remove(activity::class)
    }

    //..

    companion object {
        private val activityStack = mutableListOf>()

        fun getCurrentActivityStack() = listOf(activityStack)

        fun install(app: Application) {
            app.registerActivityLifecycleCallbacks(ActivityBackStackTracker())
        }
    }
}

Then at any moment you can log it with:

Log.d(TAG, "${ActivityBackStackTracker.getCurrentActivityStack()})