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I want to work on my data depending on what Lifecycle state I have.
For example, I want to do something, when the application was resumed. How can I find out in what State is my app now? Thanks for help.
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Hence, all in all there are four states of an Activity(App) in Android namely, Active , Paused , Stopped and Destroyed .
Activity-lifecycle concepts To navigate transitions between stages of the activity lifecycle, the Activity class provides a core set of six callbacks: onCreate() , onStart() , onResume() , onPause() , onStop() , and onDestroy() . The system invokes each of these callbacks as an activity enters a new state.
The onSaveInstanceState() method allows you to add key/value pairs to the outState of the app. Then the onRestoreInstanceState() method will allow you to retrieve the value and set it back to the variable from which it was originally collected.
Lifecycle Awareness: ViewModel objects are also lifecycle-aware. They are automatically cleared when the Lifecycle they are observing gets permanently destroyed. Data Sharing: Data can be easily shared between fragments in an activity using ViewModels .
Android Activity Lifecycle is controlled by 7 methods of android.app.Activity class. The android Activity is the subclass of ContextThemeWrapper class. An activity is the single screen in android.
Android Runtime treats the Activity in this state with the highest priority and never tries to kill it. An activity being in this state means that the user can still see the Activity in the background such as behind a transparent window or a dialog box i.e it is partially visible.
It is very similar to a single window of any desktop application. An Android app consists of one or more screens or activities. Each activity goes through various stages or a lifecycle and is managed by activity stacks. So when a new activity starts, the previous one always remains below it. There are four stages of an activity.
To navigate transitions between stages of the activity lifecycle, the Activity class provides a core set of six callbacks: onCreate () , onStart () , onResume () , onPause () , onStop (), and onDestroy (). The system invokes each of these callbacks as an activity enters a new state. Figure 1 presents a visual representation of this paradigm.
in activity: if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED)) ... I think. If you're asking about async tasks.
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