androidandroid-lifecyclelifecycleapplication-lifecycle

Lifecycle @OnLifecycleEvent() is deprecated, and you should use LifecycleEventObserver or DefaultLifecycleObserver


Answer is on bottom

I think it will be useful for you


Solution

  • 1 - LifecycleEventObserver

    Firstly

    You should implementation this: more info

    Old dependency have been deprecated:

    implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
    

    New dependency, You should use this

    dependencies {    
        implementation"androidx.lifecycle:lifecycleprocess:2.8.3"
    }
    

    Secondly

    You should write this:

    class App : Application() {
        override fun onCreate() {
            super.onCreate()
    
            ProcessLifecycleOwner.get().lifecycle.addObserver(lifecycleEventObserver)
    
        }
    

    Thirdly

    You should write this:
    In here I implemented only two Lifecycle Event, when you need other Lifecycle Event, you should implement them

        var lifecycleEventObserver = LifecycleEventObserver { _, event ->
            when (event) {
                Lifecycle.Event.ON_STOP -> {
                    //your code here
                }
                Lifecycle.Event.ON_START -> {
                    //your code here
                }
                else -> {}
            }
        }
    

    2 - DefaultLifecycleObserver

    Firstly

    You should implementation this:

    dependencies {
        implementation "androidx.lifecycle:lifecycle-extensions:2.2.0"
    }
    

    Secondly

    You should write this:

    class App : Application() {
        override fun onCreate() {
            super.onCreate()
    
            ProcessLifecycleOwner.get().lifecycle.addObserver(defaultLifecycleObserver)
    
        }
    

    Thirdly

    You should write this:
    In here I implemented only two Lifecycle Event, when you need other Lifecycle Event, you should implement them

        var defaultLifecycleObserver = object : DefaultLifecycleObserver {
    
            override fun onStart(owner: LifecycleOwner) {
                super.onStart(owner)
                //your code here
            }
    
            override fun onStop(owner: LifecycleOwner) {
                super.onStop(owner)
                //your code here
            }
        }
    

    3 - ActivityLifecycleCallbacks

    Firstly

    You should write this:

    class App : Application() {
        override fun onCreate() {
            super.onCreate()
    
            registerActivityLifecycleCallbacks(activityLifecycleCallbacks)
    
        }
    

    Secondly

    You should write this:

        private val activityLifecycleCallbacks = object : ActivityLifecycleCallbacks {
            
            override fun onActivityCreated(activity: Activity, savedInstanceState: Bundle?) {
                
            }
    
            override fun onActivityStarted(activity: Activity) {
                
            }
    
            override fun onActivityResumed(activity: Activity) {
                
            }
    
            override fun onActivityPaused(activity: Activity) {
               
            }
    
            override fun onActivityStopped(activity: Activity) {
                
            }
    
            override fun onActivitySaveInstanceState(activity: Activity, outState: Bundle) {
    
            }
    
            override fun onActivityDestroyed(activity: Activity) {
    
            }
    
        }