When my activity stack is like,
MainActivtiy -> Activity1 -> Activity2 -> Activity3
I need to go 3 back states to reach MainActivtiy from Activity3
I could be able to close opened activities from Activity3 like,
Intent intent = new Intent(getApplicationContext(), MainActivity.class);
intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
startActivity(intent);
But, above code segment closes all activities including MainActivtiy and starts new MainActivtiy. I want to know are there any other options to do the task that I need. I dont want to create new Intent because it drops the data of static methods that I have created in my MainActivtiy.
Please help me, Thanks in advance.
You should use FLAG_ACTIVITY_CLEAR_TOP which will bring the running activity on top and remove all other activities above it
Note : it will trigger the onNewIntent of already running activity otherwise mention launchMode = "singleTask" in activity tag, inside manifest
Related
I have 2 activities (MainActivity,SecondActivity)
I am starting SecondActivity from MainActivity now the situation is when I click onbackpress it's return to MainActivity without finishing the second activity
How I can go back to the second activity without reinitializing the activity again?
I created foreground service to display a notification and added the flag start UpdateCurrent to the pending intent but this cause that Oncreate recalled
what is the solution for this ?
If my understanding of your issue is correct, you need to try this:
Intent.FLAG_ACTIVITY_CLEAR_TOP
Intent.FLAG_ACTIVITY_SINGLE_TOP
And this:
Intent int = new Intent(SecondActivity.this, MainActivity.class);
int.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
startActivity(int);
I'm using this library which is a Wizard.
When user is done with the Wizard and clicks Done button he moves to another Activity.
I have added to Manifest file android:noHistory="true" for the WizardActivity and also when I start the next activity im doing it like this :
Intent intent = new Intent(this, ProjectsActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(intent);
Nevertheless when user click backs he still goes to the WizardActivity. I'd like the user either to exit or go the activity that started the WizardActivity.
Thank you
finish() the activity after launching the other Activity. i.e after startActivity(intent) add finish()
As the title says, Why intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP) or intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP) won't work?
I have 3 Activities let us say A, B and C.
When I am trying to launch Activity A from C with code:
Intent i = new Intent(this, A.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);
It simply starts Activity A but doesn't clear the top.! -_-
I have also tried using setFlags().
I read different questions on SO about this problem, but I couldn't find the right answer. >_<
Somebody please help!
Edit
Code for onBackPressed() in activity 'A' as requested by #codeMagic.
#Override
public void onBackPressed(){
if(wvLogin.canGoBack())
wvLogin.goBack();
else
super.onBackPressed();
}
From the documentation for FLAG_ACTIVITY_CLEAR_TOP:
If set, and the activity being launched is already running in the
current task, then instead of launching a new instance of that
activity, all of the other activities on top of it will be closed and
this Intent will be delivered to the (now on top) old activity as a
new Intent.
As you added in your comment, the activity A has been finished before calling B, so this situation doesn't apply. A new instance of activity A will be launched instead.
As I see it, you have two options here:
1) Use the Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK flags. This will start activity A as the root of the stack. It works, but any other activities in the stack will be lost. Assuming A was the first activity (or at least, that you are not interested in any previous activities in the task stack) then it doesn't matter. Note: CLEAR_TASK requires API Level 11.
2) Another possible solution (in case the previous assumption is not true) would be to not use intent flags at all:
B starts C with startActivityForResult().
Instead of calling A, C finishes, having set a result for B indicating that A must be launched.
In B.afterActivityResult(), finish B and launch A.
You are missing the Intent.FLAG_ACTIVITY_SINGLE_TOP flag
Try this:
Intent i = new Intent(this, A.class);
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
startActivity(i);
You used a diferrent intent: use the one you initialized:
Intent i = new Intent(this, A.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); \\WRONG;;
startActivity(i);
solution:
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); \\RIGHT;;
You could either put a noHistory true to the Activity A in the manifest
android:noHistory=true
I am having 3 activities. From the third activity, I need to come back to the 1st activity when a GUI button is clicked. I know I can click the "physical" back button 2 times to make this but that is not an option.
So, is there any way I can display the 1st activity, without creating a new instance? I can pass the 1st activity's instance to the third activity, no issue with that.
Use the FLAG_ACTIVITY_CLEAR_TOP in your intent.
From the documentation:
For example, consider a task consisting of the activities: A, B, C, D. If D calls startActivity() with an Intent that resolves to the component of activity B, then C and D will be finished and B receive the given Intent, resulting in the stack now being: A, B.
To use:
Intent intent = new Intent(getBaseContext(), FirstActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
Intent intent = new Intent(src_ctxt, dest.class);
intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP | Intent.FLAG_ACTIVITY_CLEAR_TOP);
src_ctxt.startActivity(intent);
This should do it
I think you need to make your activity B singleInstance that if it's already create you don't want to create again, that is launch mode of the activity can be defined in manifest android:launchMode that defines how the activity will be instanciated.
in your case use android:launchMode="singleInstance"
or
You can use flag Intent.FLAG_ACTIVITY_NEW_TASK. If the activity is already running it will bring that to front instead of creating new activity.
Activity Flow in my app.
WelcomeActivity -> SignInActivity -> SignUpActivity ->
TabsActivity(this is main) -> ...
I want to close all previous activities (Welcome, SignIn, SignUp) when start TabsActivity.
I try several method...
TabsActivity. clear task on launch=true ? but not work (maybe)
TabsActivity. launch mode = singleTask ? but not work
But I do not want to "save 3 activities and call each activity.finish()"
Depending on the situation, "available 2 or 4 activities not 3", or
"I do not know What activities is in activity stack".
I want to clear all previous activities, regadless of any situation.
Help me :)
Sorry my poor english... Thanks.
If I understand correctly, you might want to try starting your TabsActivity with the following code:
Intent intent = new Intent(getApplicationContext(), TabsActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
The flag Intent.FLAG_ACTIVITY_CLEAR_TOP clears the history.
Use
Intent intent = new Intent(getApplicationContext(), ClassToLaunch.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
This will finish the previous activities
To Close Previous Activities ,you should start New Activity with startActivityForResult and then before finishing the current Activity with finish() call , setResult(value) for previous Activity ,the previous Activity will then get a callback where you can call finish() for the previous Activity.
Clear Backstack of android, from where you are calling tabActivity
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);