如何为ImageButton添加高程？

Question

I added an ImageButton and set it background to imagedrawable but when i add elevation to it I get a rectangular shadow.

here is my button:

<ImageButton
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        android:background="@drawable/ic_bookmark_red"
        android:layout_gravity="left"
        android:id="@+id/bm"
        android:elevation="6dp"/>

Here is the drawable i used :

Answer 1

I think you have to draw your drawable as a svg symbol.

Is your drawable a .jpg? JPG does not support transparent backgrounds and sure, the shadow will be rectangular, because a JPG is always rectangular.

It may will work with a PNG file which has a transparent background (take care, that the background is transparent, not white), but i did not test it.

But with a svg drawable it will work! Maybe the symbol library from Android Studio has a symbol that fits you needs.