我想为XML中的自定义视图指定子布局,类似于include元素的layout属性:

<include layout="@layout/all_apps_cling"
         android:id="@+id/all_apps_cling"
         android:layout_width="match_parent"
         android:layout_height="match_parent"/>


此外,我需要自定义视图在设计时在Eclipse或IntelliJ图形布局预览中呈现

使用attr name =“ android:layout”不起作用

[至少不在图形布局预览中]

attrs.xml

<declare-styleable name="ShowcaseView">
    <attr name="android:layout"/>
</declare-styleable>


usecase.xml

<com.github.espiandev.showcaseview.ShowcaseView
    style="@style/ShowcaseView"/>


styles.xml

<style name="ShowcaseView" parent="match_fill">
    <item name="android:layout">@layout/handy</item>
</style>


ShowcaseView.java

public ShowcaseView(Context context) {
    this(context, null, R.styleable.CustomTheme_showcaseViewStyle);
}

public ShowcaseView(Context context, AttributeSet attrs) {
    this(context, attrs, R.styleable.CustomTheme_showcaseViewStyle);
}

public ShowcaseView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    // Get the attributes for the ShowcaseView
    final TypedArray styled = context.getTheme().obtainStyledAttributes(attrs, R.styleable.ShowcaseView, 0, 0);
    TypedValue handLayout = null;
    // Not sure if should be using .getValue in the first place
    // But there is no method TypedValue.getLayout or such
    if (styled.getValue(R.styleable.ShowcaseView_android_layout, handLayout)) {
        // Does not reach here
    } else {
        // Reaches here instead i.e. getValue failed
    }
    styled.recycle();
}


有什么办法吗?

而且我不能使用<attr name="linkedLayout" format="reference"/>,因为我需要它在图形布局预览中工作-在设计器中查看访问资源的问题Resources$NotFoundException in Graphical Layout ADT preview (but app actually Works)

最佳答案

尝试将布局放置在主布局文件中:

<ShowcaseView ...>
    <include .../>
</ShowcaseView>


当然,您也可以直接添加子代,而不是添加标记:

<ShowcaseView ...>
    <Button .../>
    ...
    <Button .../>
</ShowcaseView>

10-07 19:25
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