Android :: Settings Layout

问题

I need help... I got errors with my android xml... Here's the code:

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

<CheckBoxPreference 
    android:key="music"
    android:title="Music"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:summary="Play Music for each screen"
    android:defaultValue="true" />

<CheckBoxPreference
    android:key="hints"
    android:title="Hints" 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:summary="Enable hints during gameplay"
    android:defaultValue="true" />

</PreferenceScreen>

Here is the error messages:

com.android.layoutlib.bridge.MockView cannot be cast to android.view.ViewGroup
You must supply a layout_width attribute.
You must supply a layout_height attribute.

Thanks in advance..

回答1:

try this :

<?xml version="1.0" encoding="utf-8"?>
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android">

    <PreferenceCategory android:title="CheckBoxPreference">

        <CheckBoxPreference
             android:key="music"
             android:title="Music"
             android:summary="Play Music for each screen"
             android:defaultValue="true" />

        <CheckBoxPreference
             android:key="hints"
             android:title="Hints" 
             android:summary="Enable hints during gameplay"
             android:defaultValue="true" />

    </PreferenceCategory> 
</PreferenceScreen>

回答2:

in your layout xml files you may have forgot to add layout_width to a view. this attribute is required for any view in an xml file.

回答3:

<?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:orientation="vertical" >

    <ScrollView
        android:id="@+id/scrollview_test"
        android:fillViewport="true"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">

        <com.marlonlu.pinterest.ui.module.GallaryView
            android:id="@+id/gridview_test"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent" />
    </ScrollView>

</LinearLayout>

From above code, you can see how to define my custom view com.marlonlu.pinterest.ui.module.GallaryView , In Android you must define layout_width and layout_height in your layout which use custom view.

来源：https://stackoverflow.com/questions/10044898/android-settings-layout