I'm seeing the same thing and wondering the same. In my case I'm fetching an internet resource in setViewValues so calling it three times is very expensive.
On Jul 30, 3:39 pm, William Ferguson <[email protected]> wrote: > Hi all, I have a ListView populated using a SimpleCursorAdapter that > has a ViewBinder, and I'm finding that when the ListView is displayed, > ViewBinder#setViewValueis called 3 times for each row of the cursor. > > Once during onMeasure: > at au.com.xandar.contactsmanager.DisplayContactsActivity > $1.setViewValue(DisplayContactsActivity.java:56) > ... > at android.view.View.measure(View.java:8171) > at android.view.ViewRoot.performTraversals(ViewRoot.java:801) > at android.view.ViewRoot.handleMessage(ViewRoot.java:1727) > at android.os.Handler.dispatchMessage(Handler.java:99) > at android.os.Looper.loop(Looper.java:123) > at android.app.ActivityThread.main(ActivityThread.java:4627) > at java.lang.reflect.Method.invokeNative(Native Method) > at java.lang.reflect.Method.invoke(Method.java:521) > at com.android.internal.os.ZygoteInit > $MethodAndArgsCaller.run(ZygoteInit.java:868) > at com.android.internal.os.ZygoteInit.main(ZygoteInit.java: > 626) > at dalvik.system.NativeStart.main(Native Method) > > Once during onLayout: > at au.com.xandar.contactsmanager.DisplayContactsActivity > $1.setViewValue(DisplayContactsActivity.java:56) > ... > at android.view.View.layout(View.java:7035) > at android.view.ViewRoot.performTraversals(ViewRoot.java:1045) > at android.view.ViewRoot.handleMessage(ViewRoot.java:1727) > at android.os.Handler.dispatchMessage(Handler.java:99) > at android.os.Looper.loop(Looper.java:123) > at android.app.ActivityThread.main(ActivityThread.java:4627) > at java.lang.reflect.Method.invokeNative(Native Method) > at java.lang.reflect.Method.invoke(Method.java:521) > at com.android.internal.os.ZygoteInit > $MethodAndArgsCaller.run(ZygoteInit.java:868) > at com.android.internal.os.ZygoteInit.main(ZygoteInit.java: > 626) > at dalvik.system.NativeStart.main(Native Method) > > And the third time from onMeasure again. > > Firstly, is this expected behaviour? > > If it is, then what's the best way of performing potentially expensive > work in ViewBinder#setViewValue? > For example, retrieving the results of another cursor whcih is used to > construct the bound view. > > Or am I approaching this from entirely the wrong view point? > > William -- 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
