Android :: Best Way To Restart Activity?
Aug 17, 2010
I'm building a game which works as some type of a quiz. I ask user the question and when he submits the answer(click or touch correct answer) I need to refresh the page with some other question.
How should i implement this? How to wait for users answer and continue when onClick or OnTouch listener finishes?
Should i use Handler class, intents or something else?
I want next scenario:
On the screen I have a question and 3-4 clickable ImageButtons. I'm building some of the layout dinamically from custom showQA() function. User choose the answer and if he clicked the correct answer i should start some type of animation on the screen. I've done that from the onClickListener. Now, i need to build layout again(show new question and answers) from the showQA() function which must be called after that animation showed to the user. How can i know when the onClickListener() finished its work?
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Aug 21, 2009
I have a problem to start/create Activity in landscape mode. My Activity need to start in landscape mode and be used in landscape mode by users. So far, I used setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) to force screen orientation of my Activity to landscape mode in onCreate() method.
In addition to this screen mode requirement, my application need to start another background thread in onResume() method, and this thread takes some seconds in order to finish an initialization process, and it is not desirable to to stop/restart this thread's service during the initialization process.
However setRequestedOrientation (ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE) forces my Activity restart in a very little while (means onCreate->onResume->onPause->onStop are executed twice at the first place). As a result, my background thread be stopped/restarted during the initialization process, and this makes me a mess at this moment.
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Sep 9, 2009
Is there a way to restart an activity? The reason is that need to change the theme dynamically, and the activity needs to be restarted and redraw itself after the change.
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Jan 13, 2010
I've searched and I know it seems some people frown upon using activities within tabs, but moving past that...how would I restart a tabbed activity while still keeping the tabs visible? I have an activity in a tab, I use the menu to create a new activity to update the tab's activity displayed info, when I return from the menu activity I want the new information to be displayed in the tab's activity. I am using startActivityForResult() from the menu choice, but when I return and try to restart the activity...it wipes out the tabs above(I guess as expected, but I want to re-launch the refreshed activity within the tab).
Creating the tabs:
TabHost host = getTabHost();
Intent home_intent = new Intent(constants.HOME_ACTION,
null, this, homeTab.class);
Intent inbox_intent = new Intent(constants.INBOX_ACTION,
null, this, inboxTab.class);
Intent stats_intent = new Intent(constants.STATS_ACTION, null,
this, infoTab.class);
host.addTab(host.newTabSpec(constants.HOME_TAG)
.setIndicator(getText(R.string.home_label),
getResources().getDrawable(R.drawable.icon))
.setContent(home_intent));
host.addTab(host.newTabSpec(constants.INBOX_TAG)
.setIndicator(getText(R.string.inbox_label),
getResources().getDrawable(R.drawable.icon))
.setContent(inbox_intent));
host.addTab(host.newTabSpec(constants.STATS_TAG)
.setIndicator(getText(R.string.stats_label),
getResources().getDrawable(R.drawable.icon)).setContent(
stats_intent));
Return from the menu activity in the tab's activity(updating database info): code...
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Mar 8, 2010
Activity SplashScreen is the launching activity for my app. It sends a request to my server and gets back a user data it then uses to populate a user object which is a static object. Once it has that it calls the MyMapView activity and finishes itself. A force close occurs when I hit the home button and then open up enough other apps so that Android kills MyMapView to get more resources. Now when I open my app again it tries to start MyMapView and bypasses SplashScreen. There is no user object so I get null pointer exceptions. I have tried to Override the onSaveInstanceState and OnRestoreInstanceState but it seems that those are not available when Android kills the activity. I also tried android:finishOnTaskLaunch with the SplashScreen (maybe this should be put on MyMapView but the article I read said different) and that seems to have no effect. What I would like is for the activity to not restart after Android has killed it. What can I do about this?
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Mar 18, 2010
For an unknown reason, I can't get my application leaving properly so that when I push the home button and the app icon again I resume where I was in the app....But I would like to force the application to restart at the first activity...I suppose this has something to do with onDestroy() or maybe onPause() but I don't know what to do..
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Nov 21, 2009
I'd like to use FLAG_ACTIVITY_CLEAR_TOP to launch an activity in my app. It has one feature I don't want though - it restarts the target intent, instead of just resuming it. Example history stack, with activity D making the call to B with that flag:
A B C D
new stack
A B
But 'B' gets relaunched, its onCreate() method is called. Since B is already in the history stack, is there a way I can use this flag, but have it *not* recreate B, just onResume() it again? The reordering flags are kind of what I need too, but they won't pop C and D, just reshuffle the stack so B comes to the top, but I want C and D to go away.
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Nov 5, 2010
I'm developing an application that uses a library project to store much of the functionality and content. When I edit the code and/or content in the library and then run the app, it doesn't properly restart the activity with the changes, giving the warning:
Warning: Activity not started, its current task has been brought to the front
I understand that this warning comes from the SK not thinking that there were any changes to the app, but there were (to the library, not to the app itself).
The only way that I've found to force the app to recompile with the library changes is to do Project->Clean. While this is effective, it's a bit annoying to have to do this every time a make a change. Does anyone know of a way to force the SDK to recognize that a library change should result in reloading the application?
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Mar 19, 2010
I want to make an activity that allows orientation changes on some condition, but not otherwise. More exactly I want to prevent restarting the activity when a background thread is busy.
I have put the configChanges attribute on the activity manifest, and onConfigurationChanged is called when the orientation changes. However I want to allow the app to change the orientation when allowed.
CODE:...................
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Jan 13, 2010
My application has two activities, that I start in this order: HOME > A > B Now I press HOME and launch "A" again. I would like to see activity "B" on a top of "A", but instead I get "A" - so the activity stack is cleared. Manifest: <activity android:name=".activity.A" android:label="A" android:always Retain Task State = "true">What should I do?
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Sep 22, 2010
How to bring stop activity to foreground (restart) by itself?i use Broadreceiver and intent to restart my activity.but always start two activity (include original activity)how to restart my original activity?
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Mar 17, 2010
I have a single Activity application, within it I have a service which creates an AlarmManager and sends a broadcast to a broadcast Receiver.If the activity which starts the services dies, (ie. divide by zero), the broadcast receiver stops the old service which created the AlarmManager.It works the first time. The second time, it does not.It seems like the AlarmManager is still active but the broadcast receiver is no longer receiving. It works great once!
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Oct 6, 2010
In my Project I want to play audio files in mediaplayer and displays progressbar. If I exit the application then also player have to play audio file. If I restart The Activity
I have to display progress bar with last activity progress.
Here I tried using onSaveInstanceState() method. But I cant display progress bar with last progress. when I exit the activity player is playing but when I restart activity it stopped and displayed new view without any progress and saved data.
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Jul 28, 2009
I have fixed the activity screen orientation to portrait on AndroidManifest.xml file. When I open or close the keyboard the activity gets restarted. How to avoid this restart?
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Nov 8, 2010
I have an Android app with a splash screen.
This splash screen pre-loads data and when finished starts the application's main activity and finishes (through a finish() call).
This works quite well as long as the application is not totally killed. So, I can usually switch back and forth between different tasks as usual: when I leave the app from a sub activity and return soon after I will be presented with this sub activity.
Now, when I leave this sub activity and do some other stuff for a while inevitably this application process is killed by the OS.
No problem so far. Now I would expect Android, being unaware of my preloading (if the data was not preloaded it would just take longer or not display some fonts, but Android cannot be aware of the fact that I am doing preloading somewhere), to restore the sub activity from a Bundle. However the splash screen activity is started.
So, I say, that's fine then... the splash screen activity is after all the launcher / main activity. Now, the actual mystery I have is as follows.
When I press the back-button from this newly loaded splash screen I will be presented with the sub activity I left the application from before it got killed. I really don't understand this. Apparently Android DID save the sub activity's state (and its history stack) to be reloaded but instead of reloading it chose to start the splash screen instead, with this sub activity (I left the task earlier before it got killed) one step back on the activity stack.
Why does this happen?
When the process is not killed I can switch back to where I left off. When it's killed I cannot (yet still have the whole earlier history of that app restored). I know that Android has to load state etc. in the latter case, but that shouldn't be a problem and is performed automatically by default (according to the docs).
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May 15, 2009
I am developing a ToDo reminder type of app for android. on creation of a new reminder an alarm and vibrator scheduler is created with a toast. This works on intents and broadcasts and is pretty straight forward stuff with putextras using the reminder id from the db. My problem is, if some one restart the phone, i guess all the scheduled alarm and vibrator tasks for the reminder will be killed. Once the phone restart again how to recreate the scheduler tasks.
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May 8, 2010
My app intiates an activity. On the click of a button, the app opens up the browser with a webpage. When I hit the back button, it comes back to my initial activity screen, but does not resume or restart the activity.
When I put all the layout code and activity code in onResume instead of onCreate, the activity gets restarted.
My question is whether this is the right way to go about it? Can I use onResume to draw my layout and initiate the activity, or is this poor design? When the browser fires up, does the initial activity forget its layout?
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Apr 20, 2010
I have noticed that when aps restart my phone, it takes about 15 to 20 seconds to restart When i Power down, it takes MINUTES!Does anyone know of simple restart app I could use to avoid this? If not, anyone know someone who could make one?
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Jan 22, 2010
I've been having some reception issues that seem be cleared up when i restart the handset. What I'd love is to be able to schedule a daily restart around 4am to prevent any problems from the phone running too long. Does anyone know of an app that could do this for me?
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May 11, 2010
Is it possible to programmatically restart the phone from a application (service) running on top of the Dalvik VM?If the SDK does not provide this functionality, then how about using the NDK and calling some functions provided by the kernel? I know this option is not preferred (not stable enough libs), but if it's the only option, I'll have to consider that as well.
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Nov 9, 2010
I want to restart my webview with different URL, here i have taken one button onclick i m changing URL now how to reload this activityin short how to restart the same activity..
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Apr 29, 2009
How do I restart my service automatically when my service gets killed or crashes, until and unless I myself de register the service.
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Nov 4, 2010
It's pretty shitty when my ipod freezes and I can easily restart it but my dinc freezes and I need to pull the case, cover, and battery. Is there a way to set up a hard restart button on a rooted phone?
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Aug 30, 2010
I'm developing on Android. I have to restart home and all its components (widgets, shortcuts, etc..).
For example, when we have a Force Close, the home screen restart and reload all its components.
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May 6, 2010
I am writing a simple android application with a class that extends activity, that plays a video from a url on the web. There is a button on top that on click takes the user to a web page.
What I want to do is when the user is browsing the web page, if he hits the back button, I want him to come back to the main activity and restart the video. Is there a way to do this?
Also, is there a way the video can be resumed from where it left off?
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Feb 18, 2010
I am testing an android device with eclair using the 2.1 CTS version. When CTS completes a set of tests and restarts the device a "device disconnected" messages appears on the CTS console. However after the device completes the restart to the android home screen CTS does not detect that the device is back online. I have to physically disconnect the USB cable and re-connect it. Do you think this is a device side issue or a USB driver issue on the Ubuntu machine (intrepid) where I am running the CTS?
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Sep 9, 2009
how to restart an android Acitivity? I tried the following, but the activity simply quits.
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Jun 22, 2010
In my android app i have an ui-update-thread that keeps all my views up-to-date.
Code...
within onStop() to prevent the thread from running all the time. if i don't do this, it would keep running even if i close the app!
problem is: how do i bring this thread back to life when returning from some other activity to this one? run() doesn't work, calling the initial start() in some other method like onResume() crashes the app.
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Apr 2, 2010
I am able to insert the contacts into SIM card and delete from it. But it needs to be phone restart to update the changes. The below is the code woks for delete the conatcs,
Uri simUri = Uri.parse("content://icc/adn");
Cursor cur = context.getContentResolver().query(simUri, null, null, null, null);
prn("Number of SIM Contacts are.."+cur.getCount());
int row =0; while(cur.moveToNext()){
String name = cur.getString(cur.getColumnIndex("name"));
prn("Name..."+name); String data = cur.getString(cur.getColumnIndex("number"));
if(!data.equals("")) prn("Number.."+data);
String where = null; if(!name.equals("") && !data.equals("")){
where = "tag =" + name + "AND" + "number =" +data;
else if(name.equals("") && !data.equals("")){
where = "number ="+data;
else { where = "tag ="+name+ "AND" +"number="+null;
} context.getContentResolver().delete(simUri, where, null);
row++; } prn(row+" are deleted"); cur.close(); cur = null;
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Apr 15, 2010
I'm writing a Tetris application on Android for my bachelor thesis at the University of Hasselt. Currently I have a working Tetris base game, but it just keeps on ticking when the activity gets in the background. I'm trying to fix this by overwriting the onStop()and onRestart()methods.when I press my home button on my device I will go to my home screen and onStop() is called. Because the gamemode is now "PAUSE", the game wil not tick anymore. But now, when I longpress my home button and select my tetris activity again, the activity pops up, but it isn't ticking! This is because the onRestart() is never called when I return to play my application.What is the reason that this method is never called? Am I understanding the activity lifecycle wrong?
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