Send Data Back from Child Activity with startActivityForResult Android Studio Tutorial

What is activity life cycle in Android? Once an activity is launched, it goes through a lifecycle, a term that refers to the steps the activity progresses through as the user (and OS) interacts with it. There are specific method callbacks that let you react to the changes during the activity lifecycle. The activity lifecyle has four states.What is main activity file in Android? The Main Activity File The main activity code is a Java file MainActivity.java. This is the actual application file which ultimately gets converted to a Dalvik executable and runs your application. Following is the default code generated by the application wizard for Hello World! application − package com. example.What is the difference between activity and view in Android? View is Display System of Android where you define layout to put subclasses of View in it eg. Buttons, Images etc. But Activity is Screen System of Android where you put display as well as user-interaction,(or whatever which can be contained in full-screen Window.)How do you kill an activity? You can also add android:noHistory="true" to your Activity tag in AndroidManifest. xml . Yes, all you need to do is call finish() in any Activity you would like to close.What are the 4 types of app components? There are four different types of app components: Activities. Services. Broadcast receivers. Content providers. Jan 13, 2021What is the role of activity in Android? An activity provides the window in which the app draws its UI. This window typically fills the screen, but may be smaller than the screen and float on top of other windows. Generally, one activity implements one screen in an app.