Android :: ActivityGroup And Subactivities Lifetime
Nov 23, 2009
I'm extending ActivityGroup class and implemented a custom tabHost and widgets for my app. Can someone shed a light on how are the Activities fife-time inside an ActivityGroup?.
Im getting a weird behavior when using the following code to send a new intent to the current sub-activity, then change tab, and getting back to original tab. (TAB1 -> TAB2 -> TAB1)
CODE:.......
What i see from debug..
onSaveInstanceState() is called on TAB1, then TAB2 is current subActivity, but when going back to TAB1 onCreate() is called.
onCreate() is not called with the same test without using the onNewIntent() described above.
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Aug 19, 2010
Currently my application allows the user to set the application to run in full screen. I than check in every activity at onCreate() if the user has set to make the app run in full screen. Is there a better way to do this? I have many other settings that I do and I find this method a little bad in terms of code design. Is there a way to set full screen for the lifetime of app or until I set it back to not full screen? One way to do it would be to have a custom Activity class that does these checks and all my activities can just implement it? would that be slow is it recommended?
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Jul 19, 2010
What is the lifetime of an app's global android.content.Context object? Does it last until the last component of the app is terminated by the Android runtime?
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Aug 17, 2010
What is the lifetime of a ContentProvider in Android? After onCreate() is invoked, will the ContentProvider persist unconditionally for the lifetime of the process?
My ContentProvider manages a list of records, but only 1 is designated "active" and will be accessed by different applications a lot. I was wondering if it's safe to cache the index of this active record in memory as a member of my ContentProvider to speed up lookup.
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Mar 24, 2010
I recently formatted my computer and updated to Windows 7. I backed up my keystore and tried to sign my apk with it but it gave me an error that said my certificate expires in 22yrs. which is just shy of what the market requires to upload the apk. So now I am stuck not being able to update my app... Is there a way to extend the lifetime of certificates so that I can update my app?
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Sep 15, 2010
I have next problem, I have got parent activity and few sub- activities, if app goes to the background by pressed HOME button for long time, all children will be killed, and my app restart from parent activity.
For example: A1 - parent, A2,A3,A4 - sub-activities. A1-->A2-- >A3(top), from A3 I go to the background (HOME). wait 30-40 min and
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Jul 19, 2010
Is there an exception in the lifetime rules for a parent activity that's in the background after invoking startActivityForResult()? From my understanding, in low memory scenarios, the background activities are killed before the foreground. Does this rule still apply even if the background activity started the foreground one for the purpose of obtaining some result?
In this case, I think it would make sense for the foreground child activity to get killed first or to equalize the lifetime of the parent and child.
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Dec 10, 2009
I'm not sure if the screen on the Droid is OLED or regular LCD. I know that leaving an LCD on for hours at a time can possibly shorten the life of the backlight... Anyone know what the case is here?
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May 12, 2009
About ActivityGroup or give me some hints on how to use it? I looked at the documentation but I wasn't able to understand how it works...
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Mar 3, 2009
I want to add a MapActivity in an ActivtyGroup. As only single level inheritance is supported, my class can either extend from either MapActivity or ActivityGroup. As far as I know MapActivity is not a part of ActivityGroup. I want an activity to extend MapActivty as well be a part of an ActivityGroup.
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Mar 24, 2010
I need a to create a layout that holds to other layouts. each one of the layout should be populated by a different activity.
I've done some research and came across the fact that I need to implement an ActivityGroup and use it's LocalActivityManager. problem is that I don't understand the View hierarchy in such a situation. a naive attempt to find the view of the parent window (simple findViewById) fails (returns NULL).
I can't find any examples on the web. have anyone done it before?
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Aug 19, 2010
So I have a default searchable Activity in my app, and if I press the search button in simples activities it works. But when I'm in a tab where the content is an ActivityGroup, and not an Activity, the app crashes.
CODE:..............
Even if I add this code in my activityGroup, I'm still crashing :
CODE:.....................
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Aug 23, 2010
I am using an ActivityGroup and when I finish a top-level Activity (e.g. with destroyActivity method) and display one from history, the getCurrentActivity method returns the last Activity - the finished one. I need to access currently displayed activity, which is actually shown.
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Jul 1, 2010
I have one problem using ActivityGroup. I have two activities inside an ActivityGroup and both of them use a menu (overriding the onCreateOptionMenu and onOptionsItemSelected).
Well, the problem is that the second activity in the group doesn't show the menu when I press the menu Key. The first activity works fine showing the menu.
I have this code in child activity:
CODE:...........................
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Jul 16, 2010
I'm trying to give my first steps on working with ActivityGroups. To be more specific, I have a parent activity with a layout containing several buttons, and another layout below them in order to add other activities' layouts by means of the "addView()" method. Well, everything works fine in functionality terms; but I'm experiencing a weird behavior inside the layout where other activities are kind of loaded into. A black line along the top border of the layout plus a slight shadow do appear when I run the application on the emulator. I have tried to play changing the paddings, margins, etc. with no success.
Has any of you experienced such weird behavior?
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Apr 14, 2009
I'm trying to run an activityGroup embedded inside another activityGroup. (Example : an activityGroup inside a tabActivity)
This seems to display properly but throw an exception when i'm trying to display a modal box like an alertDialog.
CODE:............
If childActivity1 or 2 try to display a dialogBox i'm getting this exception :
CODE:......................................
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May 31, 2009
I have 6 options to put in options Menu, but 3 of them are not so important and i want to hide them in submenu. All of my Activities are started from one ActivityGroup which creates Menu on MENU button press. Problem is that when I open SubMenu or Dialog (which is created and displayed by ActivityGroup) my current foreground activity makes onPause, onStop and onDestroy, and when I close this submenu (using "back" key) or dialog (by "ok" button for ex.) I don't have any response (onCreate, onResume) from any of my activities registered in LocalActivityManager.
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Feb 22, 2010
I have a Activitygroup and some activities are part of it.
lets say Activitygroup is DetailsGroup which has a activity by name DetailsActivity.
On certail events DetailsActivity launches another activity ExtraActivity by calling startActivityForResult(intent, 2);
The extraActivity is launched it does its work and before calling finish() of it I am calling setResult(RESULT_OK,mintent);
By doing this I was expecting that the DetailsActivity's onActivityResult() would be called, but instead DetailsGroup activities' onActivityResult() is getting called.
Any idea what changes are required to get DetailsActivity's onActivityResult() called in above scenario?
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Jul 21, 2010
I'll be brief. I have an application with the following Activities Schema:
A (ActivityGroup) | |__
B (Activity Group) | | | |__
C (Activity) | |__ ... (Other Activities) | |__
D (ListActivity) | | | |__
ListView with a custom adapter with two buttons per row
All the Activities shown on the "diagram" are displayed and visible in real time while the application is being executed.
I'm pushing new list elements from C to the ListView in D. And by clicking each row's buttons I'm trying to edit the data of the row by means of a dialog. The problem is when, in the dialog activity, I perform the setResult() and finish(); the D's onActivityResult() is never called, and I do not know why.
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Aug 20, 2009
I have a tab with an activitygroup as the intent of tab1.
My code of the activity(group):
CODE:..................
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Sep 25, 2010
Does the battery lifetime takes a hit if I let it charging after it's been fully charged? For example, letting the phone charging overnight...
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Sep 29, 2010
I am using an ActivityGroup to spawn multiple activities and switch views from within the same tab in a TabActivity.
When I press the back key this method is called inside my ActivityGroup
CODE:..............
This method allows me to keep a stack of my activities and go back to the previous one when the back key is pressed.
This is working well on all my nested activities, except on a ListActivity where a press on the back key will simply exit the application.
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May 18, 2009
I have an ActivityGroup containing three embedded Activities (A, B and C). Sometimes I need to "destroy" A and B to start another one, D, and when D is finished, A and B are re-created. Is it possible? If so, how can I do it?
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Oct 11, 2009
I have a tab bar and within one tab want to implement an activity flow (without leaving the tab screen). I tried to get this up with an ActivityGroup and it partly works, but certain commands like the onCreateOptionsMenu must be dispatched to the ActivityGroup child activity manually.
The main issue is that showDialog() in my child activity of the ActivityGroup fails with the following exception:
CODE:.............
How I can get the child activities fully working? I expect this to happen with more of the built-in activity methods and there is not much documentation for the ActivityGroup.
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Mar 30, 2010
I'm trying to make an ActivityGroup which has it's own interface, which should be persistent between Activities.
I have it working for my own Activities. But when I try to launch a 3rd party activity (from it's Intent{action="ACTION_HOME", category="CATEGORY_LAUNCHER"}) I get a java.lang.SecurityException because the Activity I want to start does not have the same UID as the calling Activity. Does anyone knows how to cirumvent this?
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May 27, 2009
I have an ActivityGroup with an embedded TabActivity and another simple Activity.
The TabActivity has three tabs, each one with a ListActivity.
When I try to start a search from a list (calling onSearchRequested()), I get a WindowManager$BadTokenException.
I've tried requesting focus in the list, but the same error occurred.
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Jan 12, 2010
Just caught wind of this and thought I'd pass it on. I can see some others have talked about the program and this article also includes instructions on how to securely install on a rooted phone. AndroidSPIN | You heard it here, first, on AndroidSPIN. Your No.1 source for Android news. Blog Archive Free lifetime Wave Secure accounts for Android users till 31 Jan 2010. Download from Market today!
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Oct 19, 2010
today i meet the problem.i need technic can control the android machine from server.then i want send data from server to android with no request from android.
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Apr 14, 2010
I'm trying to open a dialog window, but every time I try to open it it throws this exception:
CODE:.................
I'm creating it by calling showDialog with the display's id. The onCreateDialog handler logs fine and I can step through it without an issue, but I've attached it since it seems like I'm missing something:
CODE:............
Is there something missing from this? Some questions have talked about having this problem when creating a dialog from onCreate, which happen because the activity isn't created yet, but this is coming from a call from a menu object, and the appContext variable seems like it is correctly populated in the debugger.
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Jun 3, 2010
I'm writing an application which connects to a back office site. The backoffice site contains a whole slew of JavaScript functions, at least 100 times the average site. Unfortunately it does not load them, and causes much of the functionality to not work properly. So I am running a test. I put a page out on my server which loads the FireBugLite javascript text. Its a lot of javascript and perfect to test and see if the Android WebView will load it. The WebView loads nothing, but the browser loads the Firebug Icon. What on earth would make the difference, why can it run in the browser and not in my WebView? Any suggestions.
More background information, in order to get the stinking backoffice application available on a Droid (or any other platform except windows) I needed to trick the bakcoffice application to believe what's accessing the website is Internet Explorer. I do this by modifying the WebView User Agent.Also for this application I've slimmed my landing page, so I could give you the source to offer me aid. package ksc.myKMB;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.Window;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
import android.webkit.WebSettings;
import android.webkit.WebViewClient;
import android.widget.Toast;
public class myKMB extends Activity {
I already have JavaScript on the web browser on, the problem is the web view is acting to different from the web browser.
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