相关疑难解决方法(0)

使用下面的图层列表,我的尺度drawable永远不会显示.这是为什么？

menu_dialog_header.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
  <item>
    <shape>
      <solid android:color="@color/black"></solid>
    </shape>
  </item>
  <item>
    <scale
      android:scaleHeight="50%"
      android:scaleWidth="100%"
      android:scaleGravity="top"
      android:drawable="@drawable/shine" />
  </item>
</layer-list>

shine.xml

<?xml version="1.0" encoding="utf-8"?>
<shape
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:shape="rectangle">
  <solid android:color="@color/shine" />
</shape>

menu_dialog.xml

<!-- header -->
<LinearLayout
  android:background="@drawable/menu_dialog_header"
  android:layout_width="match_parent"
  android:layout_height="wrap_content"
  android:gravity="center_horizontal|center"
  android:padding="8dp"
  android:orientation="horizontal" >
  ...