In this example you give design to button, TextView, Edittext  and Others in android. For Drawable design first right click on res Folder and click on New and click on Android Resource File and give any name to file.

XML Files : – First Design

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:bottomLeftRadius="8dp"
android:topRightRadius="8dp"></corners>
<stroke
android:width="4dp"
android:color="#2bffd8"></stroke>
<solid android:color="#550de7"></solid>
</shape>

XML Files : – Second Design

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:bottomLeftRadius="8dp"
android:topRightRadius="8dp"></corners>
<stroke
android:width="4dp"
android:color="#edf90f"></stroke>
<solid android:color="#de1eef"></solid>
</shape>

XML Files : – Third Design

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<corners
android:radius="8dp"></corners>
<stroke
android:width="4dp"
android:color="#edf90f"></stroke>
<solid android:color="#de1eef"></solid>
</shape>