从可绘制对象中更改可绘制对象

Question

我有一个带有自定义拇指的搜索栏，需要将图像作为背景

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape>
            <size
                android:width="60dp"
                android:height="60dp" />
            <solid android:color="@android:color/transparent" />
        </shape>
    </item>
    <item android:id="@+id/seekThumbImg"
        android:drawable="@drawable/placeholder_drawable">
        <shape>
            <size
                android:width="60dp"
                android:height="60dp" />
        </shape>
    </item>
    <item>
        <shape xmlns:android="http://schemas.android.com/apk/res/android"
            android:shape="oval">
            <solid android:color="@color/white_transparent_20"/>
            <stroke
                android:width="1dp"
                android:color="@android:color/white" />
        </shape>
    </item>
    <item>
        <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
            <item
                android:width="29dp"
                android:gravity="center"
                android:height="29dp">
                <bitmap xmlns:android="http://schemas.android.com/apk/res/android"
                    android:src="@mipmap/ic_slide_arrow"
                    android:tint="@color/white" />
            </item>
        </layer-list>
    </item>
</layer-list>

我想将图像放入活动中的id = seekThumbImg programmaticallty项目中。可以这样做吗？