Android Question Activity.Finish

Bucky108 · Apr 29, 2018

I know this is been hashed and rehashed many times on the forums but I still haven't found a way to really close an activity. I've tried of course Activity.Finish and also:

B4X:

Sub CloseActivities
    Dim jo As JavaObject
    jo.InitializeContext
    jo.RunMethod("finishAffinity", Null)
End Sub

Nothing seems to close the activity. I've tried waiting literally overnight and the activity still shows in recent apps.

What I'm trying to do is execute a sub from a shortcut from the app icon and not show the activity.

Any suggestions?

Jorge M A · Apr 29, 2018

Have you try to put your sub within a service module?
As far as I know, is the OS who decide when to kill the process of the activity.

Peter Simpson · Apr 29, 2018

Read this:

https//www.b4x.com/android/forum/threads/how-to-kill-all-activities-in-the-app.51442/page-2#post-332894

Bucky108 · Apr 29, 2018

Jorge - I can't put the sub in the service module because I want to have a shortcut icon as part of the app.

Peter - Is that post saying that if you are sure that this is the only remaining activity then it's OK to use ExitApplication?

Erel · Apr 29, 2018

Bucky108 said:
I know this is been hashed and rehashed many times on the forums but I still haven't found a way to really close an activity

Not sure that I understand. Activity.Finish closes the current activity.

Bucky108 · Apr 29, 2018

For example:

B4X:

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.
    Dim b As Button
    
End Sub

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    'Activity.LoadLayout("Layout1")
    b.Initialize("b")
    Activity.AddView(b,100dip,100dip,100dip,100dip)
    
End Sub

Sub b_Click
    Activity.Finish
End Sub

Click the button, then click the "overview" button on the bottom of the screen and the activity is still displayed.

Jorge M A · Apr 29, 2018

Do you mean in the recent tasks list? if positive, maybe @NJDude advice here (^) can help.

Bucky108 · Apr 29, 2018

Yes, I meant in the recent tasks list.

Jorge M A · Apr 29, 2018

Did you read the link? It helps you?

Bucky108 · Apr 29, 2018

Yes but I only want that to happen when a shortcut is selected from the desktop icon.

Erel · Apr 30, 2018

Bucky108 said:
Yes, I meant in the recent tasks list.

The activity is destroyed after you call Activity.Finish. The OS keeps a screenshot of it in the recent apps list. Why do you want to remove it?

Bucky108 · Apr 30, 2018

I'm using shortcuts for the app to run a specific process and then exit. When the user selects a shortcut, I want the user to not see the activity screen at all even in the recent apps list.

Erel · May 1, 2018

How are the shortcuts implemented? How is the activity started?

Bucky108 · May 1, 2018

Erel,

I'm using DonManfred's "ShortcutHelper" library to add the shortcuts.

The activity is started normally in the Main module (i.e. I'm not using StartActivity).

I do a check to see if a shortcut was selected and if yes, bypass Activity.LoadLayout, run the sub for the requested function, and then I want to exit the app completely.

Erel · May 1, 2018

Bucky108 said:
and then I want to exit the app completely

You are confusing two different things. You are not talking about exiting the app completely but rather about preventing the activity from appearing in the recent apps list.

Add this code to your activity:

B4X:

Dim ctxt As JavaObject
ctxt.InitializeContext
Dim ActivityManager As JavaObject = ctxt.RunMethod("getSystemService", Array("activity"))
Dim tasks As List = ActivityManager.RunMethod("getAppTasks", Null)
If tasks.IsInitialized And tasks.Size > 0 Then
   Dim task As JavaObject = tasks.Get(0)
   task.RunMethod("setExcludeFromRecents", Array(True))
End If

This will prevent the app from appearing in the recent apps list.
Source: https://stackoverflow.com/questions/27633329/activity-excludefromrecents-not-working-on-android-5-0

I've only tested it on Android 8 device.

Bucky108 · May 1, 2018

Thanks Erel I'll try that and let you know the result.

Bucky108 · May 1, 2018

It worked! I also only tested it on an Android 8 device. It only goes though the code if SdkVersion >= 25 so I think it will work on 7.1 and above.

Thanks Erel.

Douglas Farias · Jul 15, 2019

Erel said:
You are confusing two different things. You are not talking about exiting the app completely but rather about preventing the activity from appearing in the recent apps list.

Add this code to your activity:

B4X:

Dim ctxt As JavaObject ctxt.InitializeContext Dim ActivityManager As JavaObject = ctxt.RunMethod("getSystemService", Array("activity")) Dim tasks As List = ActivityManager.RunMethod("getAppTasks", Null) If tasks.IsInitialized And tasks.Size > 0 Then Dim task As JavaObject = tasks.Get(0) task.RunMethod("setExcludeFromRecents", Array(True)) End If

This will prevent the app from appearing in the recent apps list.
Source: https://stackoverflow.com/questions/27633329/activity-excludefromrecents-not-working-on-android-5-0

I've only tested it on Android 8 device.

Hi Sorry to back a old thread, but the subject of my question is totally linked to this.
this code is working fine on Android 5+, perfect....

I would like to know if anyone has this same solution for Android <5.
i need excludefromrecents via code (not manifest), and this need work on android 3, 4 etc...

I tried some tips found in the forum, using intent etc ... but neither one worked correctly the same as the code above.

thx

Edit:

I made this. i dont know if is the right way to make this, but its working .
here is the code

B4X:

Sub Activity_Create(FirstTime As Boolean)
    If Activity.GetStartingIntent.HasExtra("exitapp") Then ExitApplication
   
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)
End Sub


Sub Activity_Click
    Private jo As JavaObject : jo.InitializeContext : jo.RunMethod("Remover_Recentes", Null)
End Sub



#If JAVA
   public void Remover_Recentes()
   {
     import android.content.Intent;
     Intent intent = new Intent(this, main.class);
     intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
     intent.putExtra("exitapp", true);
     startActivity(intent);
     return;
   }
#end if

Android Question Activity.Finish

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