Android clear back stack

So if you want to kill all the previous activities, just follow these methods. Ravi is hardcore Android programmer and Android programming has been his passion since he compiled his first hello-world program. Solving real problems of Android developers through tutorials has always been interesting part for him.

Hi In my app i have 5 Activities like login, reg1,reg2,reg3 and menu. Please help me.

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Thank u. You can Use Above code for your problem solution. I think It can be work. You just need to clear top flags.

Hello RaviI had an issue with my login activity as I click on login button nothing happens even after 3 4 clicks but when i destroy the app from the device and then click on the app it opens the home page which appears after login.

android clear back stack

What is the issue? Where is my coding wrong? Author Ravi Tamada Ravi is hardcore Android programmer and Android programming has been his passion since he compiled his first hello-world program. Android How to Download and Make Volley. Virender Dall. Its Intent. How about for api levels lower than 11, in particular 8 going up.

Venugopal Naidu. HI how can i clear the stack using fragment. Wachirawit Chankaew.

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Does this is the good way to finish current activity after calling next activity? Well done Ravi. Unforthunetly Stop In Api 14 samsung. Nimmagadda Gowtham.

How To Clear Activity Back Stack On Logout

What to do if we want to remove only last activity from activity stack. Narayana Reddy Seelam. Hardik Kotadiya. Please provide solution for pre 11 version…. Elyes Zliaa. Ravi Tamada. Can you paste your code?

Maulik Dadhaniya.A task is a collection of activities that users interact with when performing a certain job. The activities are arranged in a stack—the back stack —in the order in which each activity is opened.

For example, an email app might have one activity to show a list of new messages. When the user selects a message, a new activity opens to view that message. This new activity is added to the back stack. If the user presses the Back button, that new activity is finished and popped off the stack.

The following video provides a good overview of how the back stack works. When apps are running simultaneously in a multi-windowed environmentsupported in Android 7. The same holds true for Android apps running on Chromebooks : the system manages tasks, or groups of tasks, on a per-window basis. The device Home screen is the starting place for most tasks.

When the user touches an icon in the app launcher or a shortcut on the Home screenthat app's task comes to the foreground. If no task exists for the app the app has not been used recentlythen a new task is created and the "main" activity for that app opens as the root activity in the stack. When the current activity starts another, the new activity is pushed on the top of the stack and takes focus.

128 Android FragmentManager and Backstack Part 1 -

The previous activity remains in the stack, but is stopped. When an activity stops, the system retains the current state of its user interface. When the user presses the Back button, the current activity is popped from the top of the stack the activity is destroyed and the previous activity resumes the previous state of its UI is restored. Activities in the stack are never rearranged, only pushed and popped from the stack—pushed onto the stack when started by the current activity and popped off when the user leaves it using the Back button.

As such, the back stack operates as a "last in, first out" object structure. Figure 1 visualizes this behavior with a timeline showing the progress between activities along with the current back stack at each point in time. Figure 1. A representation of how each new activity in a task adds an item to the back stack. When the user presses the Back button, the current activity is destroyed and the previous activity resumes.While developing an application with feature logout, we might have come across a problem of session management.

Even if we managed to solve the authentication, we have to deal with an another problem that is page history clearing. When each user logouts out from application, we have to clear the history of activities that he has created during his session. In android application, we know that all the pages in the user interfaces are basically Activities. And here history is Back Stack. Suppose, i want to make an application with login page and home page.

What i would do is i would create login page and set it as the landing page of my application and create one more activity called home page. Home page will be the landing page after the successful authentication in the login page. Imagine a backstack as stack of activity added one over the other in LIFO manner.

In our case, there will be always an instance in the backstack because LoginActivity is our landing Activity of the app. Was this tutorial helpful for you?

All Rights Reserved. We use cookies to ensure that we give you the best experience on our website. If you continue to use this site we will assume that you are happy with it.Posted by: admin November 13, Leave a comment. I ported my Android app to honeycomb and I did a big refactor in order to use fragments. Now my app is just a single Activity with multiple fragments, so when I press the Home button I just replace one of the fragments inside it. I posted something similar here. Which will pop all states up to the named one.

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You can then just replace the fragment with what you want. So ideally, it may not be visible to you but there may be two or three fragments stacked over each other, and on back key press the UI may look cluttered,stacked. Suppose you have a fragmentA which loads Fragmnet B using fragmentmanager. So the flow is :—. Now You do some work in fragmentB and press the Save button—which after saving should go back to fragmentA.

But what actually is happenening, we are loading Fragment A again, replacing FragmentB. Two instances of FragmentsA are stacked over each other, which may not be visiblebut it is there. So even if we do clear the backstack by above methods, the transaction is cleared but not the actual fragments.

So ideally in such a particular case, on press of save button you simply need to go back to fragmentA by simply doing fm. Reading the documentation and studying what the fragment id is, it appears to simply be the stack index, so this works:. Zero 0 is the the bottom of the stack, so popping up to it inclusive clears the stack. It makes sense that it would be, and all my debug logs bare out that it is, but perhaps in some special circumstance it would not?

Can any one confirm this one way or the other?

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If it is, then the above is the best solution. If not, this is the alternative:.

Android Navigation Component Tips & Tricks — Implementing Splash screen

February 20, Android Leave a comment. Questions: I want to intent to another fragment but I got an error java. ClassCastException: android. ContextThemeWrapper cannot be cast to androidx. How to sol Questions: I use Visual Studio for mobile application development. I use Android Emulator for a long time but I have some issues with it only during the last month.

I have created some virtual de Questions: I am trying to get phone authorization to work but it never seems to send a code to my phone. I am running the test on an emulator but expecting the code on my physical device. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Add menu.

Clear back stack using fragments

Clear back stack using fragments Posted by: admin November 13, Leave a comment. Accepted answer was not enough for me. I just wanted to add :— Popping out from backstack using following fragmentManager. Just taking a simple example:- Suppose you have a fragmentA which loads Fragmnet B using fragmentmanager.Android Activities are the logical construct of the screens that we want a user to navigate through.

The relation that each Activity holds with respect to other is very crucial for a good user experience.

android clear back stack

One of the most important aspects of achieving the above is to design a proper forward and backward navigations. The Android design already has taken a very good care of providing a smooth user experience in terms of managing the screen flows. The Activities in the Stack are never rearranged. The navigation of the back stack is done with the help of the Back button.

We will now go through the default behavior of the Task and the Back Stack. We can derive from the above text a very important result. If an Activity is started from multiple Activities, then a new instance of that Activity is created and pushed on the stack rather than bringing the previous instance of that Activity to the top.

In this case, the Back button reveals the instance of the same Activity multiple times with its state in the order is was created.

Android Fragment Back Stack Example

There are few situations where we would want the manage the Task as a deviation from the default behavior. The Android Developer Guide lists some of those situations as follows:. As an e xample, the Android Browser application declares that the web browser Activity should always open in its own Task.

This means that if your application issues an intent to open the Android Browser, its activity is not placed in the same task as your application. Instead, either a new task starts for the Browser or, if the Browser already has a task running in the background, that task is brought forward to handle the new intent. In order to tackle the above deviations from the default, we are provided two modes. The launchModes and its equivalent startActivity Flags allow us to define, how a new instance of an Activity is associated with the current Task and specifies the instruction for its launch in the given Task.

The types of launchModes and its equivalent startActivity Flags are presented and investigated in the following points not all launchModes have its startActivity flag counterpart and vice vers a :. This particular flag is useful when the notification has to start the application by finishing the existing Activities. For example, if we want to start the SplashActivity from the Notification callback handler Service.

So, onNewIntent method is not called. In development phase, we should verify the application Task and back stack, if we have implemented the launchMode or have used the intent Flags. This can be done though the dump of the activity info. Janishar Ali.

Android Task and Back Stack Review. Share this blog to spread the knowledge. Share on Facebook. Share on Twitter.

android clear back stack

Share on Google Plus. Share on LinkedIn. Share on Telegram.Posted by: admin December 6, Leave a comment. When i am clicking on Logout button in my Profile Activity i want to take user to Login page, where he needs to use new credentials. But the problem is when i click device back button on the Login Activity it takes me to the ProfileActivity.

I was expecting the application should close when i press device back button on LoginActivity. The solution proposed hereworked for me. This is a hack however and uses startActivityForResult in a way that it was not designed to be used. On logout, clear Activity history stack, preventing "back" button from opening logged-in-only Activites. Android: Clear the back stack. Finish all previous activities. To clear the activity stack completely you want to create a new task stack using TaskStackBuilder, for example:.

Use ActivityCompat. When you will launch any activity using intent and finish the current activity. Now use ActivityCompat. It works fine for me. You can try finishAffinityit closes all current activities and works on and above Android 4.

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When a user signs out from one activity I had to broadcast a message from that activity, then receive it in the activities that I wanted to close after which I call finish ; and it works pretty well. February 20, Android Leave a comment. Questions: I want to intent to another fragment but I got an error java.

android clear back stack

ClassCastException: android. ContextThemeWrapper cannot be cast to androidx. How to sol Questions: I use Visual Studio for mobile application development. I use Android Emulator for a long time but I have some issues with it only during the last month.

I have created some virtual de Questions: I am trying to get phone authorization to work but it never seems to send a code to my phone. I am running the test on an emulator but expecting the code on my physical device. Your email address will not be published. Save my name, email, and website in this browser for the next time I comment. Add menu. Android: Remove all the previous activities from the back stack Posted by: admin December 6, Leave a comment.

Perhaps a better way to do this would be using broadcast receivers as shown here: On logout, clear Activity history stack, preventing "back" button from opening logged-in-only Activites See these threads for other methods as well: Android: Clear the back stack Finish all previous activities. I am also facing the same issue.In my last presenter post I showed how you can use presentation hints to tell the presenter to clear the view stack prior to showing the next view.

That is probably the most common custom navigation pattern I've seen used in MvvmCross apps, but I also wanted to note another similar pattern I've used as well. When I'm mapping out the navigation paths through my apps, I try to be very conscious of the state of the back stack at any given time. Often navigation through an app is pretty linear which makes this a non-issue, but it's also easy to come across scenarios that are more problematic.

Using our apps as an example, once you have a basket in progress the app will show you a persistent shortcut in the top bar that will bring you back to it from anywhere in the app.

Once you do so, you end up on a screen that lets you perform some different actions, one of which is the option to return to the menu to add more items. During the initial flow through the app this would simply mean going back one screen in the stack, but if the user just jumped here from somewhere else, that view doesn't exist on the stack.

To solve this we introduced the presentation concept of navigating "back or in place". This tells the presenter to start by checking the back stack for the existence of a view of the same type we're navigating to. If found, it rewinds the stack back to that view. If not found, it pops the current view, then creates and navigates to the destination view. This allows us to map out any paths we want through the app without needing to sorry about showing the other views first.

In cases where the target view isn't already in the stack, this will provide a little fade transition into the new view, rather than making it look like a normal navigation push. I find this to be a nice visual cue to the user on what happened, and avoid the expectation that the previous view is still there on the back stack. The implementation looks pretty similar on Android, except that again we're using fragments to give us finer control over the stack:.

This is just one example of what you might want to do with the back stack in your apps. I encourage you to think about the state of the stack as you build up navigation flows through your apps, in order to provide the most sensible experience possible for users.

Presentations Contact. Greg Shackles. AddAnimation transition, null ; MasterNavigationController. BackStackEntryCount - 1. GetBackStackEntryAt index.