Android :: Moving From One Activity To Another With A Pause/delay
Jun 9, 2010
I have* two activities*,
*1st one* has a ques and 4 options.
*2nd one* is like a result page (... displaying if your ans is correct or not ...and showing the right ans ..)
Now what i want is when a user clicks :
on a right option [or wrong option] ..i want to turn that Image button into green [ red] .*.and wait for a while* ..and then go to the result activity ..
*so my only concern is onclick of a ImageButton ... how to wait for a while .. and then move to other activity* * * any kind of suggestion will do ..
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Nov 30, 2009
I see no means by which my activity can pop itself off the activity stack to return the user to the one he was using before it was invoked. Is there one? My purpose is that my app has some data structures built from data provider queries that take 5-15 seconds to assemble and I don't want a lot of latency if it is used in a few one-shot purposes in rapid succession. I'm more than willing to let the system ask my app to die, but I'd like to keep warmed and ready otherwise.
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Jan 20, 2009
How to pause and resume the activity?
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Aug 18, 2010
I have one query. In Home Application the timer is running and if any ANR or Alert or Notify come then this home activity would go in Pause state but timer is running and visible. How it is happening. Can anybody explain me how this work.
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May 11, 2010
I'm start a new Activity B from Activity A, and find launch Activiy B is very slow, cost over 3000 Milliseconds, and when i click "back" to Activity A, then i found this log below:
CODE:....................
Activity B only contains a ListView with CursorAdapter.
Any idea how does this happen? this performance is unacceptable.
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Jun 14, 2010
Suppose i have a program that' s currently in a PAUSED state. Then the user launches another activity. In this second one, i want to find if the first one is in paused state or not because, if its paused, i want to recover it.
Is there a way to find if a specific activity is in pause state or not?
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Sep 10, 2009
Just wondering is it necessary to close cursor when an activity is stopped or pause?
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Jun 30, 2010
I'm trying to write a game engine in Android, but I don't have much familiarity with threads.
My thread has an attribute, mSurfaceHolder, which holds the surface that I'll be drawing to. The run() method for my thread looks like this:
CODE:.............
STATE_RUNNING represents the state when the activity is in the foreground and the game should be running.
STATE_PAUSED represents the state when another activity has come into the foreground. I'm not completely sure why I need to still draw while it's paused, but that's what I seem to have gathered from the LunarLander example.
What I'm hoping is that while I'm looking at the activity, the game will update and draw (which I test by using LogCat). And then when I go back to the home screen or another activity appears over the top, it will just draw.
Well it does draw and update while I'm watching the activity, so the game loop itself works. But when I leave the activity, it has no effect. Here is the thread's pause() method that is called from the activity's onPause():
CODE:.............
As you can see, to test this method I have logged some messages. Now what I find when I leave the activity is that "Here" is logged, but "There" is not. Now with my limited knowledge of threads (I hardly know what synchronized actually does), I believe this will happen because my thread can't get synchronized with the surface holder. But I don't know WHY it doesn't synchronize. A few seconds after I've left the activity, I see the following warning in LogCat:
Activity pause timeout for HistoryRecord
Any idea why this would happen? There are no problems if I try to start the activity again, the thread just keeps running as it was.
Just discovered something else. The thread pauses just fine if I leave the activity within about a second of having started it. And then it will resume and pause again with no problems at all while the same task is still running. I have no idea why for a short period of time it will work, but if I leave it too long, it won't.
Okay... I fixed it. But I don't think I'm supposed to do what I've done. I've basically removed any synchronization with mSurfaceHolder from both the pause() and the setState() methods (which is used by pause()). No it works as it's supposed to, but I'm thinking the synchronization is there for a reason.
Perhaps the best question for me to ask is this: WHEN should you synchronize a thread with an object by use of a synchronized block? And in this case, what is the purpose of synchronizing with the SurfaceHolder?
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Aug 7, 2010
I am experimenting with using a WebView to display Flash content inside my activity. Everything is working pretty well, but when the user hits the home key to put the activity into the background, the Flash content keeps running (sound keeps playing, etc)
I have noticed that both the stock Android browser and Dolphin Browser seem to avoid this problem, and properly pause the Flash content when the browsing activity is put into the background.
Ideally I would like a solution that kills the WebView completely if the activity is finishing, but pauses it otherwise (basically copying the default behavior of the browser)
Here is a simple test I put together that loads a game on Kongregate which has some background music:
CODE:..............
I took a look at the latest source for the stock browser, and it seems to be doing something similar (calling pauseTimers/resumeTimers), although I fear the code I have been looking at is out of date, because it is calling functions that don't seem to exist anymore.
I did verify that the call to pauseTimers is working by testing with a simple JavaScript setInterval which updates a counter. Is there something else obvious that I should be trying in regard to Window or View management?
The documentation for the mobile Flash player says:
Flash Player will also automatically pause SWF playback it is not in view or the foreground application, for example when a call is received or alarm goes off, to reduce CPU utilization, battery usage and memory usage.
This seems to be working perfectly in both the stock browser and Dolphin Browser, but not in my app. Any ideas/solutions would be greatly appreciated!
Update: Here is the function we ended up adding to our activity to get this to work. We call it with "onPause" in the activity's onPause function and "onResume" in the activity's onResume function:
CODE:....................
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Jul 15, 2010
onCreate, MyActivity will display five TextViews. After you touch one of the five TextViews, it will hide three to four TextViews and color one red and one green or just color one green.
I can code everything up to here. But how can I pause for a few seconds and then repopulate the five TextViews with new values, unhide them and make them all white?
I tried a Timer in a new project and can attach the code and make my question less vague.
Here is the main.xml
CODE:................
Here is the TestTimer.java
CODE:.....
The issue is that the Timer executes resetAndContinue and logs two entries, but it doesn't set the TextView color from green to white and it doesn't log anymore
CODE:.............
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Mar 19, 2009
When another activity is started from main activity, The main activity get destroyed and created when returned back from second Activity main activity remains in pause state till second activity finish (), on Sart or on Resume from when returned back from second activity? which one these case does happen in And roid application?
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Aug 26, 2009
I have an activity that begins with almost a page of text, then has a few form controls. When the activity launches, the first form control takes focus and the screen scrolls down to make it fully visible. When this happens, the text at the top is off the top edge of the screen. When the screen comes into view, I want the text at the top to be visible. So, onCreate, I tried sending a message to the Activity's overridden handler to do the following:
ScrollView main = (ScrollView) findViewById(R.id.main);
main.pageScroll(ScrollView.FOCUS_UP);
This did nothing. I then tried:
main.scrollTo(0,0); This also did nothing.
I then tried sending the message from onResume instead of onCreate. This also did nothing. How to force the scrollview to actually scroll?
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Feb 4, 2009
I've got four activities
A, B, C and D where A is the main entry screen.
No matter how I navigate to B, C or D (via A->B or A->C-B etc), I want the back button to always go to activity A. What flag can I set to do this specifically?
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Jul 29, 2010
I want to specify in code to move to specific activity after pressing back button on android keypad how I can accomplish this. Now I ot the solution to my prob onBackPressed() works after 1.6 version for previous versions we need use:
public boolean onKeyDown(int keyCode, KeyEvent event) method
My code for this solved prob is
@Override public boolean onKeyDown(int keyCode, KeyEvent event) {
if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.CUR_DEVELOPMENT && keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
// Take care of calling this method on earlier versions of
// the platform where it doesn't exist. onBackPressed(); }
return super.onKeyDown(keyCode, event);
} //@Override public void onBackPressed() {
// This will be called either automatically for you on 2.0
// or later, or by the code above on earlier versions of the
// platform.
Intent i=new Intent(AgesWebViewIndex.this,TabCls.class);
i.putExtra("age", "agepage");
startActivity(i);
return;
}
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May 5, 2010
I am writing a application where I am dealing with 4 activities, let's say A, B, C & D. Activity A invokes B, B invokes C, C invokes D. On each of the activity, I have a button called "home" button. When user clicks on home button in any of the B, C, D activities, application should go back to A activity screen ?
How to simulate "home" button in this case ?
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Aug 3, 2010
I'm trying to implement tab buttons bar and a navigation bar in my android application. The problem is, that I would like the navigation elements to persist. When starting a child activity, the nav bar moves.
How can I make these two elements "non-movable"?
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Sep 27, 2010
I am developing an application in android which has a login Screen. Right now I am able to receive the response from the server successfully. After a successful response it should take me to the next activity or class where I display a new screen/activity. what should I do in order to achieve this.
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Jun 23, 2010
i am using android gallery is there any listener or way i can know which get fired when user start motion, stop motion, slowing down or moving?
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Mar 30, 2010
I am writing a application which will write to a file. Now I want to show the contents of the file but How do I delay the show function so that there is enough time for the writing to be done before continuing?
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May 4, 2010
It seems that this question has been asked before, I just would like to know whether there is an update in Android.I plan to write an audio application involving low delay audio I/O (appr. < 10 ms). It seems not to be possible based on the methods proposed by the SDK, hence is there - in the meantime - a way to achieve this goal using the NDK?
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Feb 6, 2009
I am using WebView in a number of screens in my application, and notice that it takes couple of seconds when starting up for the first time. What can I do to speed it up besides trying to create one in a separate thread beforehand?
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Jul 2, 2010
I am new to android development, also new to java. I have many years of experience with OO PHP, so it's not hard for me to quickly learn Java and Android, but I still don't know many things like Thread class. I just started developing a simple app. What I want to do is that when a button is clicked, then the TextView is update in this way: the background is changed to black (by default it's set to white) Then it should wait a half a second and then set the background back to white and update the text inside the TextView
Here is my code, it's inside my Activity class:
public synchronized void onClick(View v) { // TODO Auto-generated method stub switch (v.getId()) { case R.id.btnPlay: showNewDraw(); break; } protected void showNewDraw() { textResult.setBackgroundColor(Color.BLACK); textResult.setText("Before sleep"); try { Thread.sleep(500); } catch (Exception e) { textResult.setText("Something wrong"); } textResult.setBackgroundColor(Color.WHITE); textResult.setText("After sleep"); }
The way it works now is that it seems to actually take 1/2 second from the time the button is pressed and text is updated, but the background is not reset to black and back to white - it always stays white. Either it is being set to black and instantly reset to white or it's just never set to black. What should I do in order for the "delay" effect to work?
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Sep 24, 2010
I need to let service sleep for 0.5 sec just as using Thread.sleep(); is there any method??
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Nov 17, 2010
I want to make a dummy progress dialog appear for 2 or 3 seconds. It won't actually do anything other than say detecting.
I have the code:
CODE:................
But what do I put in between the show, and the dismissal to have the dialog appear for a few seconds?
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Nov 16, 2010
I am having a hugely annoying issue with delays using HTTPClient and post the first time I call execute on the client the response takes 5 seconds to come back. Subsequent calls take around 100 to 200 ms. I am using the Apache client so does anyone know why this takes so long? The client setup looks like below
CODE:.........
The timing for this look like below.
CODE:......................
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Nov 16, 2010
I'm in a process of creating a memory game. My problem is that whenever i click for the second time, i can't even see toggled button. To be clear - first click toggles the togglebutton, so i can see the number it holds, the second click on a different togglebutton is suposed to toggle it, show me the number and then proceed to either set a score +1 if numbers are the same, or reverse them back again if they're different.
Below is the code that i use as my onClick function, i've been thinking about putting some kind of sleep or delay function somwhere in the second "if block" - (if(klikniecia ==2)).
CODE:...........
I think, about setting a delay here, so i can see both of the cards, regardles if the're the same or not before reverting them.
CODE:...................................
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Nov 24, 2010
I am using a menu in my application Same as this post... I am using a gallery view for display my menu items
Text Gallery on Android?
Problem is that, i implement onItemSelected listener for gallery, so that when new item is selected data related to that topic loaded. But i also want to allow user to scroll the gallery fully. but each time when user move to next item onItemSelected() function called and it start loading data.
All i want to do is to put some delay in onItemSelected() function, so that if in between that delay user scroll next item than there is no need to load data of previous but for the current. Time may be 1 second. If user dose not go for next item in 1 second, that data of that item must be loaded.
I thought to start a thread,but each time for onItemSelected() there will be new thread...
I try this to.
CODE:............
But Fond Exception.
CODE:.............................
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Nov 24, 2010
Is it possible to set a delay at which the scroll bar at the right side appears? The idea is that when the user begins to scroll, the scroll bar does not show up immediately, but if the user scrolls long enough.
I was looking for some time now and found just a getter method getScrollDefaultDelay (), which gets the time in ms when the scroll bar dissapears. How could I control the delay in my case?
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Nov 8, 2010
I have my own BroadcastReceiver instance for Intent.ACTION_HEADSET_PLUG action.
There is about 1-2 seconds delay between actual physical unplugging a headset and a moment when my BroadcastReceiver is notified about that.
CODE:........................
How to decrease the delay?
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Jun 18, 2010
I want to be able to call the following method after a specified delay. In objective c there was something like:
[self.performSelectorAfterDelay @selector(DoSomething) with Object:nil afterDelay:5];
Is there an equivalent of this method in java? For example I need to be able to call a method after 5 seconds. Code...
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