Custom Layout Inflation with Fragments in Robolectric not working

问题

When inflating a layout in a Fragment, with the LayoutInflater, i am getting this exception:

 ./res/layout/locations_list.xml line #-1 (sorry, not yet implemented): Error inflating class com.costum.android.widget.LoadMoreListView

I figured out that this is happening when inflating a custom layout in

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        return inflater.inflate(R.layout.locations_list, container, false);
    }

Edit This is the locations_list.xml:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@android:color/white"
    android:orientation="vertical" >

    <com.costum.android.widget.LoadMoreListView
        android:id="@+id/android:list"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:padding="0dp" />

</LinearLayout>

any other layout inflator works, like in this test:

@Test
    public void testInflator() {
        ActivityController<SherlockFragmentActivity> activityController = CustomTestRunner
                .startActivity();
        SherlockFragmentActivity activity = activityController.get();
        LayoutInflater from = LayoutInflater.from(activity);
        View view = from
                .inflate(com.twisper.R.layout.locations_list_item, null);
        assertNotNull(view);
    }

I am using Robolectric with the 2.2-SNAPSHOTs , Now my question is how could I work around this issue or how could I implement the missing functionality, the robolectric documentation is very sparse, hence I had trouble to find any starting point.

Full Stack Trace

android.view.InflateException: XML file ./res/layout/locations_list.xml line #-1 (sorry, not yet implemented): Error inflating class com.costum.android.widget.LoadMoreListView
    at android.view.LayoutInflater.createView(LayoutInflater.java:613)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:687)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java:746)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:489)
    at android.view.LayoutInflater.inflate(LayoutInflater.java:396)
...
Caused by: java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
    at android.view.LayoutInflater.$$robo$$LayoutInflater_1d1f_createView(LayoutInflater.java:587)
    at android.view.LayoutInflater.createView(LayoutInflater.java)
    at android.view.LayoutInflater.$$robo$$LayoutInflater_1d1f_createViewFromTag(LayoutInflater.java:687)
    at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java)
    at android.view.LayoutInflater.$$robo$$LayoutInflater_1d1f_rInflate(LayoutInflater.java:746)
    at android.view.LayoutInflater.rInflate(LayoutInflater.java)
    at android.view.LayoutInflater.$$robo$$LayoutInflater_1d1f_inflate(LayoutInflater.java:489)
    at android.view.LayoutInflater.inflate(LayoutInflater.java)
    at android.view.LayoutInflater.$$robo$$LayoutInflater_1d1f_inflate(LayoutInflater.java:396)
    at android.view.LayoutInflater.inflate(LayoutInflater.java)

...

Caused by: java.lang.StringIndexOutOfBoundsException: String index out of range: -9
    at java.lang.String.substring(String.java:1911)
    at org.robolectric.res.ResName.qualifyResName(ResName.java:50)
    at org.robolectric.res.Attribute.getResourceReference(Attribute.java:138)
    at org.robolectric.res.Attribute.qualifiedValue(Attribute.java:127)
    at org.robolectric.res.builder.XmlFileBuilder$XmlResourceParserImpl.qualify(XmlFileBuilder.java:316)
    at org.robolectric.res.builder.XmlFileBuilder$XmlResourceParserImpl.getAttributeValue(XmlFileBuilder.java:340)
    at org.robolectric.shadows.ShadowResources.findAttributeValue(ShadowResources.java:252)
    at org.robolectric.shadows.ShadowResources.attrsToTypedArray(ShadowResources.java:188)
    at org.robolectric.shadows.ShadowResources.access$000(ShadowResources.java:51)
    at org.robolectric.shadows.ShadowResources$ShadowTheme.obtainStyledAttributes(ShadowResources.java:460)

I also posted the issue on robolectrics issue tracker.

回答1:

I figured it out, and if you got stock to such an situation just look for your IDs in the XML, even though

 android:id="@+id/android:list"

is often seen in some example code it must be:

 android:id="@android:id/list"

回答2:

The last version of Robolectric (3.0-Snapshot) has some problems with customized views.

To fix that, do the follow:

In the module app where your code is, create a file called project.properties, at the same level as AndroidManifest.xml
Fill the content with reference to the class folder of build. e.g. for StaggeredGridView:

android.library.reference.1=../../build/intermediates/exploded-aar/com.etsy.android.grid/library/1.0.5

Here you must check three things:

There should be one line per reference
Each reference has one number (1, 2, 3), which should be increase by one each time
The version number folder at the end must match with the version number in your build.gradle file.

You have an example of project working here: https://github.com/jiahaoliuliu/RobolectricSample/blob/master/app/src/main/project.properties

回答3:

In my case I got this problem when I had this in my app:

    <dependency>
        <groupId>com.google.android</groupId>
        <artifactId>support-v4</artifactId>
        <version>r13</version>
    </dependency>

but this in my unittest project:

    <dependency>
        <groupId>com.google.android</groupId>
        <artifactId>support-v4</artifactId>
        <version>r7</version>
    </dependency>

The older version of the support library I used in the tests didn't contain the class I was trying to use (android.support.v4.widget.DrawerLayout).

回答4:

In my case, my FragmentActivity XML was inflating a Fragment that was expecting a Bundle. I swapped the XML for a FrameLayout holder and added the fragment with the proper bundle in the activity.

来源：https://stackoverflow.com/questions/17627671/custom-layout-inflation-with-fragments-in-robolectric-not-working

标签

android

robolectric