Android :: OnResume Is Always Called On TabActivity So OnCreate Is Not Necessary?

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?

Android :: onResume is always called on TabActivity so onCreate is not necessary?


Android :: Binding To Service In OnCreate() Or In OnResume()

Feb 20, 2010

I want to know what es the best place in an Activity to bind to a service? I saw examples doing it in onResume() and also in onCreate(). I was asking myself if it is not a problem putting it into onCreate(), cause in onPause() i will do a unbind to the service, so i dont get a serviceConnectionLeak, if i leave the activity. Now if i press the Home-Button and then switching to the HomeScreen, the Activity will unbind from the service, when i go back to the Activity from the Taskmanager, then onCreate() will not be called and if the Code is trying to access a function from the service i will get a null-pointer exception. If i bind and unbind only in onResume() and onPause() i dont have this problem.

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Android : OnResume Called While Device Is Off For Hours

Mar 19, 2009

I have documented cases of an activity's onResume method getting called HOURS after the G1 is - well, not asleep, since a WakeLock is in use, but "idle" with the screen off (indeed, it had been off in one case for 6+ hours).

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Android :: TextView With URL Throwing Exception When Finish() Called In OnResume()

Apr 6, 2010

I created a TextView and put an url to it, using setText(Html.fromHtml("");. Its opening the web page in the built-in browser and when I press back, its coming back to the application.

I don't want to come back to the application, so in activity's onResume(), I call finish(). Its exiting at the first time. But when I open the application again, its throwing some exception.

Any other way to close the application, other than this way.

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Android :: Android Market Licensing Check During OnCreate Or OnResume?

Aug 21, 2010

In the included LVL sample app, the license check is triggered during onCreate. This means that when I click "Buy App" to launch the market, then immediately hit the back button to return to the app, the dialog is gone and another check isn't performed, leaving me with a perfectly usable app (at least until the activity is killed and the process starts over again).Would triggering the license check during onResume() be bad form, even though it would fix this issue? Is there a better solution?

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Android :: OnKeyDown Not Being Called In TabActivity

Jun 20, 2010

I am trying to override the behavior of a TabActivity that has other Activities as children. I have made all of the children activities return false in onKeyDown so that the key will propagate through to the parent.However, this is not the case.The only key that is being recognized is the search key.Back, menu, and home are not being overridden.

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Android :: Why Is OnCreate Called Twice When Is Device Booting

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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Android :: First Tab Intent Oncreate Always Called Regardless We Set Tab2 As Default Tab

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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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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Android :: Is It Normal For OnCreate Method To Be Called Multiple Times?

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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Android :: Parent Activity Runs OnCreate Before OnActivityResult Is Called - Sometimes

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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Android :: Why Are OnCreate() OnStart() Etc Called When Handset Orientation Is Changed

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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Android :: Voice Recognition Activity Called In OnCreate Method / Causes App To Load Slowly

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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Android :: Check Value Of ListPreference In OnResume()?

Oct 12, 2010

I have a ListPreference with the entries and entryValues correctly set. When I go in the prefernces activity and change the value it successfully works (I added a Toast to output the value after changing the option to test). But when I do the following to compare it, it always executes the else statment when I change it everytime, even like above when I changed the ListPreference and the value was "bluesky" it still failed to execute the correct if statement. Here's the code I use to check the value of the ListPreference in the onResume():

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this)
String backgroundPref = prefs.getString("backgroundPref", "");

if(backgroundPref == "bluesky"){
mainLayout.setBackgroundResource(R.drawable.bluesky);
Toast.makeText(getBaseContext(), "Blue Sky", Toast.LENGTH_SHORT).show();
}else if(backgroundPref == "sky"){
mainLayout.setBackgroundResource(R.drawable.sky);
Toast.makeText(getBaseContext(), "Sky", Toast.LENGTH_SHORT).show();
}else{
mainLayout.setBackgroundResource(R.drawable.sunsetscene);
Toast.makeText(getBaseContext(), "Sunset Scene", Toast.LENGTH_SHORT).show();
}

The Toasts are there so I can double check which statement gets executed, and it always seems to be the else one. Am I having a bad day and getting something wrong?

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Android :: Calling Finish() In OnResume()?

Sep 8, 2010

I've been using code like: activity.finish(); activity.startActivity(new Intent(activity, activity.getClass()));

in two places: onResume(), and in an onClick() method of an AlertDialog. I'm getting the desired results when the code is called from onClick(), but I get mysterious null pointer exceptions while the runtime is trying to execute my onPause(). Is calling finish() from within one of the Activity lifecycle callbacks always a bad idea?

This code makes me nervous even though it works in the onClick(). After I call activity.finish(), I would think activity is in a questionable state by the time activity.startActivity() is invoked. Seems like an invitation to race conditions.

My use case is setting UI preferences (e.g. a different layout) in a PreferenceActivity. When I return to the main activity's onResume(), I check for preference changes and if a new layout is requested, I use the code snippet above.

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Android :: AnimationDrawable : Can't Be Started In OnResume / Why Is So?

Jan 27, 2009

There's already been some discussion of this, in various lists and blogs. I finally got an AnimationDrawable to work, but I cannot start it from onResume. I can start it from a timer that onResume starts, or an onClickHandler.

I've poked around the source a bit and I can't figure out, specifically, what state the view has to be in, in order for the background AnimationDrawable to start.

Can anyone enlighten me?

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Android :: Something Like An App Global OnPause() And OnResume()?

Jan 14, 2010

Is there something like an application global onPause() and onResume()?

My main activity listens for GPS fixes, which I want to continue working when switching to another screen/activity. Therefor I cannot unregister my LocationListener in the activity's onPause(). However I still want to unregister my GPS listener when switching to another application (so save battery) and turning it back on when returning to my application, regardless what screen/activity the user is currently in. Any ideas?

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Android :: Interactivity Coordination OnStop And OnResume

Oct 16, 2010

I have two activities. One loads all rows from a database, and the other saves to the database. When I have the second save in onStop and the first repull the data in onResume, they do it out of order (the first resumes and then the second saves). I managed to fix this by putting the saving data in onPause, but why was this happening? Was this the cleanest way to do it?

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Android :: Open A Dialog Immediately After OnResume?

Sep 18, 2009

I need to open a progress dialog on the onResume() method. But no dialog is opened. Any solutions for this?

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Android :: OnPause / OnResume Activity Trouble

Mar 14, 2010

I have a small test application I am working on which has a timer that updates a textview to countdown from 100 to 0. That works fine, but now I am trying to pause the application if the user presses the back button on the phone and then restart the timer from where they left off when they reopen the app.

From the Log.v() prints I see that the _timer_time_remaining variable has the correct number of seconds stored when onPause is called, but it is set back to 0 when onResume starts. Why does the variable get reset? I thought that the application would continue to run in the background with the same values. Am I missing something? This is all declared in a class that extends Activity.

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Android :: Setting Spinners OnResume Doesn't Work

May 8, 2010

I want to save text from 2 edittexts(et1,et2) and selection from 3 spinners(spinnerm,spinner and spinner2) onPause and setting them back onResume.

Text from edittexts is saved correctly, only spinner selection don't work as desired.

My code:....................

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Android :: Way To Carry Data Over Between OnPause & OnResume / Used SharedPreferences

May 30, 2010

I'm having a hard time figuring out the best way to pass simple values from onPause and onResume in the Android activity lifecycle. I understand how to use get and put extra bundles for activity to activity data, but does that work for passing data between the same activity? Should i used SharedPreferences?

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Android :: Android 1.5 - Asynctask DoInBackground Not Called / Method Called

Oct 26, 2010

I am running into an issue with the way my asynctasks are executed. Here's the problem code:

firstTask = new background().new FirstTask(context);
if(firstTask.execute().get().toString().equals("1"))
secondTask = new background().new SecondTask(context);

What I'm doing here is creating a new asynctask object, assigning it to firstTask and then executing it. I then want to fire off a separate asynctask when the first one is done and making sure it returns a success value (1 in this case). This works perfectly on Android 2.0 and up. However, I am testing with Android 1.5 and problems start popping up. The code above will run the first asynctask but doInBackground() is never called despite onPreExecute() being called. If I am to execute the first task without the get() method, doInBackground() is called and everything works as expected. Except now I do not have a way to determine if the first task completed successfully so that I can tell the second task to execute. Is it safe to assume that this is a bug with asynctask on Android 1.5? Especially since the API says that the get method has been implemented since API 3. Is there any way to fix this? Or another way to determine that the first task has finished?

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Android :: Add Footer In TabActivity

Jun 15, 2009

I created a TabActivity with contains 3 tabs. Each tab's content sets different Intents.I would like to add a "footer" wich will appear on each tab. So I get TabActivity's FrameLayout and add it my footer view.Is it possbile to define where place the footer (with an attribute like AT_BOTTOM)? So contentTab dimensions are calculated according to this footer.

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Android :: AlertDialog Within TabActivity

Oct 12, 2010

I have a TabActivity with 3 tabs. Each tab contains its own Activity. When one of the contained Activities pops up an AlertDialog, there are actually 3 dialogs created. The dialog has a Dismiss button and it must be pressed 3 times to finally dismiss the 3rd dialog.

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Android :: Returning Value From TabActivity

Oct 1, 2009

How can I return a value from TabActivity? It seems that the return value from tab pages vanishes and the caller always receives RESULT_CANCELED instead of RESULT_OK.

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Android :: TabActivity Customization / How Is Possible

Aug 18, 2009

More of a TabWidget question I guess really...

I would've tried to send a screenshot for this query if I could, but i'll try and explain.

I have 3 Tabs, each showing a separate Activity. Underneath those tabs (and above the activity display), I want to display a header. This header would probably be a Layout of some sort with a TextView inside it and a background 9patch.

Is this possible, if so how?

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Android :: TabActivity And ListActivity?

Feb 2, 2010

I am having a problem.I want to explain in detail. 1)I am Having an TabActivity with 5 tabs. I loaded content as follows.

CODE:............

And the Problem is If i want to start activity which is not specified in tabhost in above Java code,it is going out of tabactivity. ie.,It is not coming in tabactivity.

2)But i want to have all the activities under tabActivity.

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Android :: AsynQueryHandler In TabActivity

Aug 12, 2010

I create a TabActivity from Several ListActivities.

The lists are created from a cursor load in a AsyncQueryHandler. I have got no problem to load the content of the list.

After that I run an insert in the AsyncQueryHandler, and I meet the following error. The insert is done by the listActivity.

If I run my listActivity individually and that I do my insert, everything is find. Do know why ?

CODE:.......................

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Android :: Getting The TabActivity To Work?

Mar 26, 2010

I'm having some difficulties getting the TabActivity to work.

Here's the implementation of the class:

CODE:..........

The problem is that I call this class from my main activity (which is a MapActivity if it matters) and when I do the TabActivity doesn't show. It registers the click on the option menu and it even starts the intent but the screen doesn't change..it just stays on the main activity and i see in the logs that the main activity gets resumed.

I call it like this:

CODE:...............

Like I said...there are no errors (the classes called from the tabs exist of course), just no actions. I put some log commands into the onCreate function in the tabactivity (as you see) and they all get written into the log...I have no idea what I'm doing wrong here.

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