Android:在可绘制的xml中,在图层列表中,为什么项目的宽度在API 19或更低版本中不起作用? [英] Android: in drawable xml, layer-list, why does the width for item not work in API 19 or lower?
问题描述
<layer-list
xmlns:android="http://schemas.android.com/apk/res/android"
>
<!--width here doesn't work-->
<item
android:gravity="left"
android:width="10dp"
>
<shape
android:shape="rectangle"
>
<stroke
android:width="1dp"
android:color="@color/black"
/>
<!--<gradient-->
<!--android:startColor="#00dddddd"-->
<!--android:endColor="#40404040"-->
<!--android:angle="0"-->
<!--/>-->
</shape>
</item>
<!--width here doesn't work-->
<item
android:width="10dp"
android:gravity="right"
>
<shape
android:shape="rectangle"
>
<stroke
android:width="1dp"
android:color="@color/black"
/>
<!--<gradient-->
<!--android:startColor="#00dddddd"-->
<!--android:endColor="#40404040"-->
<!--android:angle="180"-->
<!--/>-->
</shape>
</item>
这里是例子.
它在Lollipop或更高版本中可用,但在Kitkat中不起作用,宽度被忽略,矩形将填充整个视图.
It works in Lollipop or higher, but it doesn't work in Kitkat, the width is being ignored, the rectangle will fill the whole view.
我还试图删除第二个项目,只保留了第一个项目,宽度仍然被忽略.
I also tried to remove the second item, only leaves the first item, the width is still being ignored.
ImageView使用此可绘制对象:
The ImageView uses this drawable:
<!--Width will be changed dynamically-->
<ImageView
android:id="@+id/someid"
android:layout_width="100dp"
android:layout_height="@dimen/someheight"
android:src="@drawable/the_xml_above"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:clickable="false"
/>
如何解决这个问题?
推荐答案
好的,我会回答我自己的问题:
Alright, I'll answer my own question:
似乎在Android 4.4或更低版本上,大小节点或width/height属性将被忽略.
因此最好的方法是:在不同的可绘制xml文件中创建不同的形状,创建相对布局而不是ImageView,然后将它们组合在相对布局中.
It seems that on Android 4.4 or below, size node or width/height attribute will be ignored.
So the best approach is: create different shapes in different drawable xml files, create a relative layout instead of ImageView, and combine them in relative layout.
<RelativeLayout
android:id="@+id/id1"
android:layout_width="30dp"
android:layout_height="@dimen/someheight"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:clickable="false">
<ImageView
android:layout_width="3dp"
android:layout_height="match_parent"
android:layout_alignParentLeft="true"
android:src="@drawable/somesrc"/>
<ImageView
android:layout_width="3dp"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:rotation="180"
android:src="@drawable/somesrc"/>
</RelativeLayout>
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