How do I start the same activity again on android?

How do I start the same activity again on android?

starting the same activity with button in android

1. yes you can.. but why do you want this ? – Jitendra Feb 22 ’13 at 13:32.
2. Call startActivity(new Intent(MyActivity.this,MyActivity.class)) then call finish() – S.D. Feb 22 ’13 at 13:41.
3. That’s a bad practice. The onCreate cycle of activity is very expensive.

How do I reset activity on Android?

If restarting an activity from a fragment, I would do it like so: new Handler(). post(new Runnable() { @Override public void run() { Intent intent = getActivity(). getIntent(); intent.

How do you recreate an activity?

Call the recreate() method from where you want to recreate your activity . This method will destroy current instance of Activity with onDestroy() and then recreate activity with onCreate() .

How will you restore activity if its destroyed when the app was in background?

When your activity is recreated after it was previously destroyed, you can recover your saved state from the Bundle that the system passes your activity. Both the onCreate() and onRestoreInstanceState() callback methods receive the same Bundle that contains the instance state information.

How do I recreate fragments?

attach() for recreating the fragment. Re-attach a fragment after it had previously been deatched from the UI with detach(Fragment). This causes its view hierarchy to be re-created, attached to the UI, and displayed. Detach the given fragment from the UI.

How do you destroy a fragment?

That said, to specifically manually remove a Fragment, Override onBackPressed in your Activity which is showing the Fragments, manually remove the Fragment there. Note: When it comes to specifically destroying your Fragment object, that is what Java’s garbage collection is for.

What is Save instance state in Android?

The savedInstanceState is a reference to a Bundle object that is passed into the onCreate method of every Android Activity. Activities have the ability, under special circumstances, to restore themselves to a previous state using the data stored in this bundle.

What is retained fragment Android?

Specifically, “retained” means that the fragment will not be destroyed on configuration changes. That is, the Fragment will be retained even if the configuration change causes the underlying Activity to be destroyed.

Why do we use fragments in Android?

Passing information between app screens Historically each screen in an Android app was implemented as a separate Activity. By storing the information of interest within the Activity, the Fragment for each screen can simply access the object reference through the Activity.

What is difference between fragment and activity in Android?

Activity is the part where the user will interacts with your application. Fragment represents a behavior or a portion of user interface in an Activity. You can combine multiple fragments in a single activity to build a multi-pane UI and reuse a fragment in multiple activities.

Which method is called when the Back button is pressed in Android?

The onDestroy method is called after back press.

How can I tell if my Android back button is pressed?

In order to check when the ‘BACK’ button is pressed, use onBackPressed() method from the Android library. Next, perform a check to see if the ‘BACK’ button is pressed again within 2 seconds and will close the app if it is so.

How do I use onBackPressed activity?

How to use onBackPressed method in android. app. Activity

1. WeakReference mActivity;mActivity.get()
2. Stack activityStack;activityStack.lastElement()
3. (Activity) param.thisObject.

What are the 3 buttons at the bottom of android called?

3-button navigation — The traditional Android navigation system, with the Back, Home, and Overview/Recents buttons at the bottom.

How do I change the icons at the bottom of my Android phone?

Moving icons out of the Home screen dock

1. Touch and hold any of the icons in the bottom dock and move it upwards.
2. Drag it to any of your Home screens and release.
3. It will now reside on that Home screen and you will have a blank spot in the dock for a new icon.

What are the three buttons in Android?

3-button navigation: Tap Overview . Swipe right until you find the app you want….Move between screens, webpages & apps

• Gesture navigation: Swipe from the left or right edge of the screen.
• 2-button navigation: Tap Back .
• 3-button navigation: Tap Back .

How do I change the buttons on my Android?

There’s no option to remap the power button though—it’s just not possible on Android. To change what a button does, tap on it then pick your preferred function. Available options include going to the home screen, going back a screen, returning to the last app, taking a screenshot and turning the flashlight on.

Do all Android phones have a back button?

No, not every device comes with a back button. Amazon Fire phone do not have a back key. On Android platform it is always better to be cautious as device manufacturer always do customization.

How do I change the buttons on my Android screen?

From Settings, tap Display, and then tap Navigation bar. Make sure Buttons is selected, and then you can choose your desired button setup at the bottom of the screen. Note: This option will also affect the location you swipe when using Swipe gestures.

How do I change the back and home button on my Android?

Put the back button where it should be on the Galaxy S8!

1. From the home screen, swipe down to reveal the notification shade.
2. Tap on the Settings button (cog icon).
3. Tap on the Display menu.
4. Scroll down and tap on Navigation bar menu.
5. Tap on Button layout.
6. Switch orientation to Back-Home-Recents (if applicable).

What is the Home button on Android?

The Home key is usually a round or square software button situated in the middle of your navigation bar.