Re: How to nest XML layout files??

mmin18 · by **mmin18** » Wed Feb 13, 2008 2:28 pm

krystox wrote:Hi,

I have one XML layout file which defines a view, but I want to include it into another view as a portion. That view is also defined in XML. What is the syntax to include external files in the layout file? Anyone knows about it?

Thanks!

i haven't found a way to include a XML in another XML directly, so i create a ViewWrapper class that you can use as follows: (replace org.XXXX to your android package)

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Using xml Syntax Highlighting

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res/org.XXXX"
        android:orientation="vertical" android:layout_width="fill_parent"
        android:layout_height="fill_parent">
        <org.XXXX.ViewWrapper android:layout_width="fill_parent"
                android:layout_height="wrap_content" app:wrapLayout="@layout/text" />
</LinearLayout>
 
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and the res/layout/text.xml is simply as follows:

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<?xml version="1.0" encoding="UTF-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
        android:text="TEXT" android:layout_width="fill_parent"
        android:layout_height="fill_parent" />
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if you want to use this ViewWrapper class, it only needs two files:

the res/values/attrs.xml: (defines the attribute app:wrapLayout in the ViewWrapper class)

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<?xml version="1.0" encoding="utf-8"?>
 
<resources>
        <declare-styleable name="ViewWrapper">
                <attr name="wrapLayout" />
        </declare-styleable>
</resources>
 
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and the ViewWrapper.java:

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package org.XXXX;
 
import java.util.Map;
 
import android.app.Activity;
import android.content.Context;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewInflate;
import android.widget.FrameLayout;
 
public class ViewWrapper extends FrameLayout {
 
        public ViewWrapper(Context context) {
                this(context, null, null);
        }
 
        public ViewWrapper(Context context, AttributeSet attrs, Map inflateParams) {
                super(context, attrs, inflateParams);
                android.content.Resources.StyledAttributes a = context
                                .obtainStyledAttributes(attrs, R.styleable.ViewWrapper);
                int id = a.getResourceID(R.styleable.ViewWrapper_wrapLayout, -1);
                if (id > 0) {
                        setView(id);
                }
                a.recycle();
        }
 
        public View setView(int resId) {
                ViewInflate vi = getContext() instanceof Activity ? ((Activity) getContext())
                                .getViewInflate()
                                : ViewInflate.from(getContext());
                View v = vi.inflate(resId, this, null);
                return v;
        }
}
 
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that's it.
anyproblem, mailto: mmin18 [at] gmail

regards

krystox · by **krystox** » Thu Feb 14, 2008 3:55 am

Great! I used the similar way to work around, but the wrapper classes are very annoying. Anyways, thanks for your example.

selmi · by **selmi** » Wed Mar 05, 2008 4:56 am

something weird is happening

if i use your ViewWrapper like this:

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<com.google.android.gx5weather.ViewWrapper
 
       android:id="@+id/st_wrap"
 
       android:layout_weight="1.0"
 
       android:layout_width="fill_parent"
 
       android:layout_height="0px"
 
       app:wrapLayout="@layout/screen_today_highlow"
 
/> 
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then everything works....

but when i try to encapsulate it in layout like this:

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 
     xmlns:app="http://schemas.android.com/apk/res/com.google.android.gx5weather"
 
     android:orientation="horizontal"
 
     android:layout_width="fill_parent"
 
     android:layout_height="0px"
 
     android:layout_weight="1.0"
 
     >
 
     <com.google.android.gx5weather.ViewWrapper
 
          android:id="@+id/st_wrap"
 
          android:layout_width="fill_parent"
 
          android:layout_height="fill_parent"
 
           app:wrapLayout="@layout/screen_today_highlow"
 
      />
 
</LinearLayout>
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then when i start activity i get crash:
ava.lang.RuntimeException: binary XML file line #46: You must supply a layout_width attribute

any idea what is causing this? maybe i am missing something, but with ordinary views i never had such problem and as you can see layout_width is there...

plusminus · by **plusminus** » Wed Mar 05, 2008 9:59 am

Hello selmi,

Does it work with explicit numbers :?:

The internal representation of "[font=Lucida Console]fill_parent[/font]" is [font=Lucida Console]-1[/font] or [font=Lucida Console]0[/font], what could produce that error.

Regards,
plusminus

selmi · by **selmi** » Thu Mar 06, 2008 12:09 am

plusminus wrote:Does it work with explicit numbers

The internal representation of "[font=Lucida Console]fill_parent[/font]" is [font=Lucida Console]-1[/font] or [font=Lucida Console]0[/font], what could produce that error.

i tried to replace all "fill_parent" with "100px" and result is the same. so i replaced things not only in this wrapper but also in xml whicgh is loaded into it. andstill no luck

always same error

chitgoks · by **chitgoks** » Mon Mar 17, 2008 9:42 am

my error is error parsing xml : unbound prefix

<LinearLayout
android:id="@+id/content1"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#ff99ccff"
>

<com.boom.bam.wrapper.ViewWrapper
android:layout_width="fill_parent"
android:layout_height="wrap_content"
app:wrapLayout="@layout/login" />

</LinearLayout>

mmin18 · by **mmin18** » Mon Mar 17, 2008 10:03 am

Hello, selmi:

why do you give a android:layout_height="0px"?
i don't know why your program crashes, it seems all right.
maybe you can try to modify the ViewWrapper class to extends other layouts such as AbsoluteLayout, LinearLayout.

Hello, chitgoks:

unbound prefix? may be you forgot to declear your xml namespaces: xmlns:app="http://schemas.android.com/apk/res/com.boom.bam.wrapper"

chitgoks · by **chitgoks** » Mon Mar 17, 2008 10:04 am

ah i found whwat's causing it

<com.bigfoot.gymlobby.wrapper.ViewWrapper
android:layout_width="fill_parent"
android:layout_height="wrap_content"
app:wrapLayout="@layout/login" />

it is this line.

ah right i didnt add
xmlns:app="http://schemas.android.com/apk/res/org.XXXX"

my error now is no resource identifier found for hte attribute WrapLayout in package com.bla.bla.wrapper

mmind18
thanks

mmin18 · by **mmin18** » Mon Mar 17, 2008 10:18 am

if your ViewWrapper is in the package com.bigfoot.gymlobby.wrapper.ViewWrapper, then i think your xml should like this:

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<com.bigfoot.gymlobby.wrapper.ViewWrapper
 
xmlns:app="http://schemas.android.com/apk/res/com.bigfoot.gymlobby.wrapper"
 
android:layout_width="fill_parent"
 
android:layout_height="wrap_content"
 
app:wrapLayout="@layout/login" />
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selmi · by **selmi** » Mon Mar 17, 2008 10:29 am

mmin18 wrote:Hello, selmi:

why do you give a android:layout_height="0px"?
i don't know why your program crashes, it seems all right.
maybe you can try to modify the ViewWrapper class to extends other layouts such as AbsoluteLayout, LinearLayout.

i use it with combination with android:layout_weight="1.0" , so it will take all available space which remains in parent layout.

problem with crash is that mostly it works, sometimes not. if not then after i delete something (almost randomly chosen) it works... i think the best would be if there would be way to find out WHAT is in binary xml on line which is reported... or if error message would write lines in source xml, but i doubt its possible

chitgoks · by **chitgoks** » Mon Mar 17, 2008 10:36 am

ratz. i wanted to hide my package name lolz

ahh.. i thought it has to be in LinearLayout. and i added it there now mmin18 but the same error shows

chitgoks · by **chitgoks** » Mon Mar 17, 2008 11:04 am

mmin18: it doesnt matter right? if my
R.java is in com.bigfoot.gymlobby.android?

while my ViewWrapper is in com.bigfoot.gymlobby.wrapper

thanks

mmin18 · by **mmin18** » Mon Mar 17, 2008 12:02 pm

chitgoks wrote:mmin18: it doesnt matter right? if my
R.java is in com.bigfoot.gymlobby.android?

while my ViewWrapper is in com.bigfoot.gymlobby.wrapper

thanks

if your R.java is in com.bigfoot.gymlobby.android, then you should declear like this:

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<com.bigfoot.gymlobby.wrapper.ViewWrapper
xmlns:app="http://schemas.android.com/apk/res/com.bigfoot.gymlobby.android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
app:wrapLayout="@layout/login" />
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the xmlns:app should always be your R.java package

chitgoks · by **chitgoks** » Mon Mar 17, 2008 4:18 pm

cool! ill do that.

but i dont understand though. why it's like that

i thought the xmlns:app would be the package name of the ViewWrapper. but instead it's actually the path to where R.java is?

thanks

chitgoks · by **chitgoks** » Tue Mar 18, 2008 2:23 am

hi selmi, did you manage to make it work?

i also get that error. and another one Binary XML file line #31: Error inflating class

Re: How to nest XML layout files??

Re: How to nest XML layout files??

I have one problem....

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