The point of runOnUiThread() *is* to run code on the UI thread. Therefore it must NOT be used for long running operations. Usually runOnUiThread() is invoked from another thread.
On Wed, Jan 21, 2009 at 7:50 PM, for android <[email protected]> wrote: > any help on this ?? > > On Wed, Jan 21, 2009 at 8:13 PM, for android <[email protected]> wrote: >> >> i have one question around the runOnUiThread...Basically when i used this >> method in the onCreate/onStart of the Activity,i found that it works quite >> differently than i expect.. >> >> For example in the onCreate/onStart..say I have long running operation >> before which i want to render the UI with a progress bar.and after the long >> runnin operation is complete remove the progress bar and show the view..In >> this case I found that the UI is rendered only after the long running >> operation...so i end up not seeing the progress bar..I ended up using the >> handler...Am i going wrong in my understanding of this method? >> >> >> >> protected void onStart(){ >> super.onStart(); >> ////Progress Bar Visible >> runOnUiThread( new Thread() { >> // go get our feed! >> public void run() { >> //longrunning operation >> //Progress Bar Gone >> //show the required view >> >> } >> }); >> } >> >> On Wed, Jan 21, 2009 at 7:55 PM, Mark Murphy <[email protected]> >> wrote: >>> >>> Nico wrote: >>> > Hi, >>> > I need to replace the current View (set by the activity.setContentView >>> > method) by an other. >>> > When I call activity.setContentView two times, I get this exception : >>> > 01-21 14:13:54.747: WARN/System.err(1156): android.view.ViewRoot >>> > $CalledFromWrongThreadException: Only the original thread that created >>> > a view hierarchy can touch its views. >>> > 01-21 14:13:54.757: WARN/System.err(1156): at >>> > android.view.ViewRoot.checkThread(ViewRoot.java:1849) >>> > 01-21 14:13:54.757: WARN/System.err(1156): at >>> > android.view.ViewRoot.requestLayout(ViewRoot.java:455) >>> > 01-21 14:13:54.767: WARN/System.err(1156): at >>> > android.view.View.requestLayout(View.java:6575) >>> > 01-21 14:13:54.767: WARN/System.err(1156): at >>> > android.view.View.requestLayout(View.java:6575) >>> > 01-21 14:13:54.777: WARN/System.err(1156): at >>> > android.view.View.requestLayout(View.java:6575) >>> > 01-21 14:13:54.777: WARN/System.err(1156): at >>> > android.view.ViewGroup.removeAllViews(ViewGroup.java:2033) >>> > What is problem ? >>> >>> As the exception says: "Only the original thread that created >>> a view hierarchy can touch its views". >>> >>> Are you attempting to call setContentView() from a background thread? If >>> so, arrange to call it on the UI thread, via post(), runOnUiThread(), or >>> a Handler. >>> >>> -- >>> Mark Murphy (a Commons Guy) >>> http://commonsware.com >>> Android Training in Sweden -- http://www.sotrium.com/training.php >>> >>> >> > > > > > -- Romain Guy Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support. All such questions should be posted on public forums, where I and others can see and answer them --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
