Thank you, Mark. I'll try that one out.
Still wondering why i don't see this slow down at all when not using theme-inheritance... :) But, who knows, not noticing the slow down may just be perception, because things could happen in a somewhat different order. On Oct 9, 5:36 pm, Mark Murphy <[email protected]> wrote: > You could try Traceview and see where the time is going: > > http://developer.android.com/guide/developing/tools/traceview.html > > On Sat, Oct 9, 2010 at 5:32 PM, Streets Of Boston > > > > > > <[email protected]> wrote: > > Thank you Dianne, > > I'll make sure to use the inheritance. > > > But why is it so much faster when not inheriting, not using > > '"parent="android:Theme"'? > > > When using style-inheritance properly: > > In the beginning i also thought that my code was the slow part in > > starting up and preventing a quick initial drawing of the activity's > > content-view. > > > However, I put tons of timing statements in (e.g. i time the onCreate > > begins and ends and the system's calls to onResume, onStart, > > onPostResume, etc). All the timing statements indicate that onCreate > > finishes timely, onPostCreate, onResume, etc. are all called and > > finished in a timely manner. > > > I see the last timing statement (log of 'onCreateStartTime- > > System.currentMillis()') in my onResume() implementation in the log, > > which appears quickly, in a timely manner. Then the activity just sits > > there for 0.5 - 2 seconds showing the theme's background without the > > activity's content. After the 0.5 - 2 seconds, the content shows up. > > > I just can't figure out what happens between after the call to > > onResume and the appearance of the activity's content.... and why it > > is slow, even for an activity with hardly any content (a few text- > > fields, that's all, no large intent-data either). > > > Thanks! > > > On Oct 8, 7:05 pm, Dianne Hackborn <[email protected]> wrote: > >> First, a theme MUST inherit from one of the standard ones. If it doesn't, > >> some things won't work now, some things will break in the future, etc. > > >> When an app is being launched for the first time, a preview of it is first > >> shown by constructing a window with the theme from its manifest and showing > >> that. The delay from when that empty window is shown until the actual app > >> is faded in is the time it is taking your app to launch. If you want to > >> reduce that, you need to profile and optimize your app's launch time. > > >> On Fri, Oct 8, 2010 at 3:50 PM, Streets Of Boston > >> <[email protected]>wrote: > > >> > When i create an activity that uses a custom-theme, e.g. > >> > android:theme="@style/MyLogonTheme". > > >> > I create my theme in styles.xml: > > >> > <style name="MyLogonTheme" parent="android:Theme"> > >> > <item name="android:typeface">sans</item> > >> > <item name="android:windowBackground">@drawable/ > >> > android_screen_logon_bg</item> > >> > </style> > > >> > (note that i have a few more themes and plenty more styles in > >> > styles.xml, but they are not in use for this particular activity). > > >> > When the activity is started brand new (e.g. after the process has > >> > just started), it starts VERY slowly: > >> > 1. The background (windowBackground) appears quickly, in a timely > >> > manner and the activity's 'setContentView' is called almost > >> > immediately in the onCreate. > >> > 2. However, the activity's content-view (setContentView) finally shows > >> > up 0.5 - 2 seconds later (depending on the speed of the phone)! > > >> > When i remove the 'parent' from MyLogonTheme's definition: > >> > <style name="MyLogonTheme"> > >> > <item name="android:typeface">sans</item> > >> > <item name="android:windowBackground">@drawable/ > >> > android_screen_logon_bg</item> > >> > </style> > >> > Both the background and the content-view appear quickly! > > >> > Somehow, including the inheritance from the "android:Theme" slows > >> > things down quite considerably. > > >> > Why is this the case? > >> > Is there a way around it? > > >> > I looked at the log... no special output that may indicate > >> > something... it is just slow. > > >> > BTW: > >> > If i do remove the parent="android:Theme" part, things do load/show > >> > quickly, but i get quite a few warnings in the log. The warnings > >> > complain about layout_height is missing and some ColorStateList with > >> > TypedValue (0x2/0x1010059 a=-1) can not be found. They are just > >> > warnings... i see no other side effects. > >> > If i specify the parent="android:Theme", I don't get these warnings. > > >> > Can I just remove the parent="android:Theme" part and live with the > >> > warnings? > > >> > Thanks! > > >> > -- > >> > 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]<android-developers%2bunsubs[email protected]> > >> > For more options, visit this group at > >> >http://groups.google.com/group/android-developers?hl=en > > >> -- > >> Dianne Hackborn > >> Android framework engineer > >> [email protected] > > >> Note: please don't send private questions to me, as I don't have time to > >> provide private support, and so won't reply to such e-mails. All such > >> questions should be posted on public forums, where I and others can see and > >> answer them.- Hide quoted text - > > >> - Show quoted text - > > > -- > > 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 > > -- > Mark Murphy (a Commons > Guy)http://commonsware.com|http://github.com/commonsguyhttp://commonsware.com/blog|http://twitter.com/commonsguy > > Android Training...At Your Office:http://commonsware.com/training- Hide > quoted text - > > - Show quoted text - -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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