Which Activity Lifecycle Method Should Be Used For Registering Listeners
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Android Action Lifecycle
Android Action Lifecycle is controlled past 7 methods of android.app.Action class. The android Activeness is the subclass of ContextThemeWrapper grade.
An action is the single screen in android. Information technology is like window or frame of Java.
By the help of activity, you tin can place all your UI components or widgets in a single screen.
The 7 lifecycle method of Activity describes how activity will behave at different states.
Android Activity Lifecycle methods
Allow'southward see the 7 lifecycle methods of android activity.
| Method | Description |
|---|---|
| onCreate | chosen when action is kickoff created. |
| onStart | called when activeness is becoming visible to the user. |
| onResume | called when activity will get-go interacting with the user. |
| onPause | chosen when activeness is non visible to the user. |
| onStop | called when activity is no longer visible to the user. |
| onRestart | called subsequently your activity is stopped, prior to start. |
| onDestroy | called earlier the action is destroyed. |
File: activity_main.xml
Android Activity Lifecycle Example
It provides the details nearly the invocation of life wheel methods of action. In this example, we are displaying the content on the logcat.
File: MainActivity.java
Output:
You lot will not see any output on the emulator or device. You demand to open logcat.
Now see on the logcat: onCreate, onStart and onResume methods are invoked.
Now click on the Habitation Button. Yous volition see onPause method is invoked.
After a while, you will see onStop method is invoked.
At present come across on the emulator. It is on the abode. Now click on the centre button to launch the app again.
At present click on the lifecycleactivity icon.
Now meet on the logcat: onRestart, onStart and onResume methods are invoked.
If you encounter the emulator, application is started over again.
Now click on the back push button. Now yous will see onPause methods is invoked.
Later a while, y'all will see onStop and onDestroy methods are invoked.
The onCreate() and onDestroy() methods are chosen only once throughout the action lifecycle.
Side by side Topic Android Intent Tutorial
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Which Activity Lifecycle Method Should Be Used For Registering Listeners,
Source: https://www.javatpoint.com/android-life-cycle-of-activity
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