Android 5及更低版本上的可拉伸崩溃

所以我有一个XML类来提供圆角按钮:

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" >
<gradient
    android:angle="225"
    android:startColor="#A5C938"
    android:endColor="#A5C938"/>
<corners
    android:bottomLeftRadius="7dp"
    android:bottomRightRadius="7dp"
    android:topLeftRadius="7dp"
    android:topRightRadius="7dp" />
</shape>

在较旧的设备上,当我通过:android:background=“@drawable/rounded”按钮引用此文件时,会出现一个崩溃,说明它不是一个drawable

               Caused by: android.content.res.Resources$NotFoundException: Resource "com.chimesoftware.chime.chimetimemanager:drawable/rounded_button" (7f0700ae)  is not a Drawable (color or path): TypedValue{t=0x1/d=0x7f0700ae a=-1 r=0x7f0700ae}
                  at android.content.res.Resources.loadDrawableForCookie(Resources.java:4017)
                  at android.content.res.Resources.loadDrawable(Resources.java:3929)
                  at android.content.res.Resources.loadDrawable(Resources.java:3779)
                  at android.content.res.TypedArray.getDrawable(TypedArray.java:776)