Hi Lutz. Thanks for your answer. What you propose is what I tried first in different variations:
XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); XmlPullParser xpp = factory.newPullParser(); The returned xpp is an instance of org.kxml2.io.KXmlParser and thus cannot handle the preprocessed layout.xml which is in a binary format. It could parse plain text xml but that won't work either (see below). I even tried to parse the preprocessed xml with a org.kxml2.wap.WbxmlParser which didn't work either. Finally you can see in my message above (Mar 26) that during creation of a widget with an AttributeSet the following line is executed: XmlBlock.Parser parser = (XmlBlock.Parser)set; Since I have no access to XmlBlock.Parser (which has default protection) I have no chance to provide a valid AttributeSet to a widget constructor. Daniel On Mar 26, 4:43 pm, Lutz Schönemann <[email protected]> wrote: > > The point is now: Android already has this user interface description > > (layout.xml) and the code which inflates such a description (in > > preprocessed form) to a user interface. It would be awesome to reuse > > this code! > > You can use that LayoutInflater to create the tree of views and attach > it to your Activity. I found some code inside the PackageInstaller to > load the layout from the resources but you can also use an 'external' > xml. > > --- snip --- > > View contentView; > > XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); > XmlPullParser xpp = factory.newPullParser(); > xpp.setInput(new FileReader("/path/to/layout.xml")); > > LayoutInflater inflater = > (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE); > contentView = inflater.inflate(xpp, null); > > setContentView(contentView); > > --- snip --- > > This code isn't tested!!! That's only the way I think it should work. > > Lutz > > > > > Thanks. Daniel > > > On Mar 23, 6:25 pm, droozen <[email protected]> wrote: > >> We might have to know why you want to build this way. There could be > >> other possibilities, including using a much simpler xml that you > >> could > >> parse yourself and add UI elements programmatically. Or have a > >> variety > >> of layouts available that you could set, depending on a value you've > >> downloaded, though I get the feeling you want something more dynamic > >> than that. > > >> On Mar 23, 2:10 am,Daniel<[email protected]> wrote: > > >>> Hi all, > > >>> Q: What is the recommended way to build user interfaces on the > >>> device > >>> based on layouts provided by a server at runtime? > > >>> I am aware of this: > >>> <snip source="http://developer.android.com/reference/android/view/ > >>> LayoutInflater.html"> > >>> For performance reasons, view inflation relies heavily on pre- > >>> processing of XML files that is done at build time. Therefore, it is > >>> not currently possible to use LayoutInflater with an XmlPullParser > >>> over a plain XML file at runtime; it only works with an > >>> XmlPullParser > >>> returned from a compiled resource (R.something file.) > >>> </snip> > > >>> I could imagine these possibilities: > >>> - Parse XML by myself and build the ui tree. (Seems inappropriate to > >>> me since there is already maintained code which is able to do this.) > > >>> - Transform XML on server to a simpler format which is cheaper to > >>> parse on the device. (Inappropriate as above.) > > >>> - Preprocess the XML layout on the server the same way the build > >>> does. > >>> Transmit it to the client, and then try to load it. But how? > >>> android.content.res.XMLBlock is hidden (@hide) and I don't know how > >>> to > >>> classify the stuff in package com.android.layoutlib.bridge. > > >>> Any help would be appreciated. > >>> Daniel > > > > > > smime.p7s > 10KViewDownload --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
