<Button
    android:id="@+id/btn1"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/btn_in_text"
    android:textAllCaps="false"
    android:text="блабла"
    android:textAlignment="viewStart"
    style="?android:attr/borderlessButtonStyle"
    android:layout_marginTop="20dp"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    />
<Button
    android:id="@+id/btn2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    style="?android:attr/borderlessButtonStyle"
    android:background="@drawable/btn_in_text"
    android:textAllCaps="false"
    android:text="блабла2"
    android:textAlignment="viewStart"
    android:layout_marginTop="5dp"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    />

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape android:shape="rectangle">
            <solid android:color="#000000" />
        </shape>
    </item>
    <item android:bottom="2dp">
        <shape android:shape="rectangle">
            <solid android:color="#FFFFFF" />
        </shape>
    </item>
</layer-list>