Android Button Design Example

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <shape>
            <gradient
                android:angle="360"
                android:startColor="#8A88F3"
                android:endColor="#B96AE8"
                android:type="linear" />
//for round
            <corners android:bottomLeftRadius="24dp"
                android:bottomRightRadius="24dp"
                android:topLeftRadius="24dp" android:topRightRadius="24dp" />
        </shape>
    </item>
</selector>

<Button
        android:id="@+id/btn_language_select_save"
        android:layout_width="wrap_content"
        android:layout_height="60dp"
        android:layout_centerInParent="true"
        android:layout_marginTop="20dp"
        android:background="@drawable/round_corner_spiner"
        android:paddingLeft="130dp"
        android:paddingRight="130dp"
        android:text="Vlad[enter image description here][1]"
        android:textColor="@android:color/white"
        android:textSize="20sp"
        android:visibility="visible" />