Android : Webview - OnCreate Always Get Called When Activity Comes To Foreground
Mar 29, 2009
I launch my TestWebView activity. After my web page is loaded, I put the app in the background by pressing the Home key. Then I bring the TestWebActivity back to the foreground. Unexpectedly, TestWebView's onCreate() is called when I bring the activity to the foreground. But onDestroy is never called. This same thing happens every time I tested. It appears the old TestWebView was not completely killed so there are possibly duplicate web clients running.
My code: .....
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Aug 5, 2010
The order is:
A: startActivityForResult( B ) B: <dostuff>, call finish() A: onCreate <---- what's this all about A: onActivityResult
This happens for a tiny minority of users. I havn't been able to reproduce or find any common elements. A is the launch activity.
CODE:..............
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Oct 1, 2010
In my android app I call the voice recognition in my onCreate method of my startup activity. I have made it a preference to start up with the voice control or not. However, the app takes about 5-7 seconds to load when voice recognition is on. When it is off, the app starts almost instantly. Below is sample code, I have added Free_Form, max_results 1, and a custom prompt to mine.Why would calling the normal android speech recognition take sooo long to load in my OnCreate method?
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Feb 10, 2010
As you can see, I first create a webview. Then, I want it to immediately disappear. Then, I want the Listview to come up. But the problem is, I can't do Listview if I don't do ListActivity but then I can't do Activity. Code...
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Sep 15, 2010
I have a TabActivity with 3 tabs, each tab started an activity and I realise when a tab is clicked onResume is call. If I have onCreate, when app start it will launch onCreate and then onResume immediately.So, I can just get ride of onCreate in this case?
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Jan 18, 2010
I make 'hello world' app :-) and wrote a Log code in onCreate. and then give "android.intent.category.DEFAULT" and "android.intent.category.HOME"
This situation appears emulator(1.5, 2.0, 2.1). but HTC hero(1.5, original htc rom) didn't! it just call one time! Which is normal? and If calling twice is normal, why are they call twice?
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Mar 3, 2010
Following is the example of tabs with intent data.
While debugging i found that always when first tab we add in tab host in our case following tab
CODE:................
oncreate method of "List1" intent get called regardless it is our current tab or not even if if i define tab2 as a current tab how to fix this ?
CODE:..........................
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Aug 27, 2010
I have some code in the onCreate method an Activity and noticed that it is being called three times. Is it normal behaviour?
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Dec 14, 2009
I got my hands on Android which is really fun. But at some point I don't seem to understand the concept. I've got a Main class which reads like this:
CODE:....
In the onCreate(...) I set the layout to setContentView(R.layout.main); and add an OnTouchEvent Listener to the sole View in main.xml: myView.setOnTouchListener(new OnTouchListener() {@Override public boolean onTouch(View v, MotionEvent event){...
As you can see I also implemented a SensorEventListener which is used if required. All works fine so far.
But my problem is this (at this point my misunderstanding kicks in): whenever I rotate the device the onCreate(), onStart() etc. methods are called, causing my app to act as if it just started. Furthermore, I feel unable to implement an onSizeChanged(int w, int h, int oldw, int oldh) { ... } Listener.
Can anyone please explain where my error in reasoning is? I am working on a tiny app which is more or less done, except for the just mentioned bug(s). Maybe I got it all wrong but it does what it is supposed to do (i.e. sending touch positions and accelerometer data over the network via UDP).
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Sep 11, 2009
I cant find anywhere how to change the Text COLOR in a webview. I can change the background color but not the Text.
Any Ideas? I want my webview to be white text on a black background instead of black text on a white background.
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Apr 18, 2010
I create a WebView object in the OnCreate function. Now I need to be able to pass this same object to other functions in the code, such as the onOptionsItemSelected function. I currently have it where I just create a new WebView object in each function where I need it, but this slows down the code since it has to recreate it and such.
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Mar 3, 2009
Who knows how I can make Activity visible from invisible process? .....
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Apr 22, 2010
Is there a way to call startActivity(Intent) without the newly started activity displacing the current one as the active, foreground activity?
If not purely so, are there near approximation to this effect that can be done, such as mimicking a back keypress event right after calling startActivity()? If so, which means is preferred?
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May 2, 2010
I'm getting the outgoing number using BroadCastReceiver and then starts a Activity. but my activity runs in the background??? how can i bring it to foreground? ...
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Oct 6, 2010
I want to write a service for Android platform that is notified when the current foreground activity changes. Basically the service should do some tasks only when the top activity changes. Is there any way to subscribe and to be notified when this kind of event occurs? Or there is no possibility and the service should poll from time to time the list of running activities and to check what is the foreground activity ?Not preferable solution...
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Apr 22, 2009
Is it possible to get listed the apps or activity which are actually displayed on the screen of the android mobile. I need to display a text box on some event when no acitivity is displayed, excepting the home screen.
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Oct 6, 2010
Is there a native android way to get a reference to the currently running Activity from a service?
I have a service running on the background, and I would like to update my current Activity when an event occurs (in the service). Is there a easy way to do that (like the one I suggested above)?
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Feb 17, 2010
Maybe it's easy, but I couldn't really figure this out right so far... I got a BroadcastReceiver waiting to get triggered by the AlarmMangager - this works fine.
Now: because the event, if it occurs, needs to refresh some elements on screen of the main Activity, I would like to send an Intent from that background BroadcastReceiver to my Activity - but only if it is currently in the foreground, aka active.
If it is not running or not visible, I don't care - and the last thing I want to do is start the Activity by my intent! I handle repainting of the views in my onResume method, so I don't care at all.
EDIT: my BroadcastReceiver is waiting for alarms that must be notified to the user. So, it must be there and declared in the manifest. The problem is: it will have to decide whether the mentioned Activity is currently up in front or not.
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Feb 9, 2010
I defined an activity ExampleActivity.
When my application was launched, an instance of this activity was created, say it is A. When user clicked a button in A, another instance of ExampleActivity, B was created. Now the task stack is B, A, with B at the top. Then, user clicked a button on B, another instance of ExampleActivity, and C was created. Now the task stack is C, B, A, with C at the top.
Now, when user click a button on C, I want the application to bring A to the foreground, i.e. make A to be at the top of task stack, A, C, B.
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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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Oct 19, 2009
In my application i wait on socket for network events.On some events i have to bring activity into foreground(make activity as running) if at all it is not in the foreground.
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Jul 6, 2010
I have a function that needs a Surface object to work. I'd like to be able to call that function from a background Service without starting a foreground Activity. Every Surface source in the API that I can see, though, requires a View that's laid out before the Surface becomes available. Are there other ways to create a Surface that I am missing, and can you point me to them?
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Jul 21, 2010
I'm trying to figure out a way to send touch events to the foreground activity. Essentially I want to write something that allows me to run it from the shell and just say "I touched this co-ordinate", so that I can automate some UI tasks for testing. Essentially what Monkey does, but application agnostic.
I think that android.view.MotionEvent holds the key, but I'm not sure how to run something without view so that I don't interfere with what is on the screen. Perhaps with a service, but I'm unclear how that would work.
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Jul 26, 2010
How can I make sure I only retain one copy of an activity on the stack when called from non-activity? When called from an activity I can just add the FLAG_ACTIVITY_REORDER_TO_FRONT flag to the Intent, but how can I do this from e.g. a widget or a notification?
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Sep 25, 2010
My Activity is running on the foreground and my Activity is getting pushed to background when I hit on the home button... I am trying to display the pop up at certain intervals, in this case as my activity is running on background when I try to display the pop up but thats not shown on the foreground.
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Feb 4, 2010
I currently have an application that naturally gets pushed to the background when the home key is pressed.
The activity losses focus but continues running in the background.
So I want to know is it possible to bring the application back to the foreground when the user presses the green key (call button) on the device?
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Jul 9, 2010
I have a Contact Activity which is derived from ListActivity, which displays list of contacts, and on click of item, a new Activity Message Activity derived from ListActivity is initialized.Now I know, I can pack some information in Bundle and pass it before creating activity, but is there a way I can get instance of "ContactActivity" in onCreate method of "MessageActivity"?
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Jul 24, 2010
The recent apps display seems to function quite differently from earlier versions on 2.2. Try the following for instance: 1) Open an app 2) Click on something that takes you to another activity in the same app 3) Press the home button 4) Press and hold the home button to get the recent list of apps - select the app you chose in step 1 5) You'll be taken to whatever activity in that app is specified as the main/launcher Activity, rather than the Activity on top of the stack (as it was previously) It makes it appear to the user that the application has exited when the home screen button was pressed. I don't have my app set to clear history on launch or anything like that, and I can replicate it on the emulator and with any app on my device (Contacts, Gmail, Engadget etc) Anyone else notice this? Anyone know any reason for the changes? I must admit I quite dislike the new method.
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Feb 28, 2010
My app has 2 activities - A and B. From homescreen I launch A, from A I launch B. The activity stack looks like this: A-B. Now I press HOME button, and from homescreen click again on my app icon, which launches A and adds it on top of the activity stack, which now looks like this: A-B-A. But I just want to bring my application to foreground, is that possible in Android?
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Nov 11, 2010
I'm opening an Activity using this:
startActivity(new Intent(Parent.this, Child.class)); And on the child, I have this code on the onCreate function (the if contains more than just true, of course): public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState); if (true) { AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setPositiveButton("OK", null); builder.setTitle("Error"); builder.setMessage("Connection error, please try later.") .show(); finishActivity(0); return;}}
Why is the activity not closing? I get the alert box, but then I have to tap the "back" button to go back.
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