Step 1 : Create file named : my_button_bg.xml

Step 2 : Place this file in res/drawables.xml

Step 3 : Insert below code

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"  android:shape="rectangle">  <gradient android:startColor="#FFFFFF"     android:endColor="#00FF00"    android:angle="270" />  <corners android:radius="3dp" />  <stroke android:width="5px" android:color="#000000" /></shape>

Step 4: Use code "android:background="@drawable/my_button_bg" where needed eg below:

<Button    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="Your Text"    android:background="@drawable/my_button_bg"    />

• Android Official Solution

Since Android Design Support v28 was introduced, it's easy to create a bordered button using MaterialButton. This class supplies updated Material styles for the button in the constructor. Using app:strokeColor and app:strokeWidth you can create a custom border as following:

1. When you use androidx:

build.gradle

dependencies {    implementation 'androidx.appcompat:appcompat:1.1.0'    implementation 'com.google.android.material:material:1.0.0'}

• Bordered Button:

<com.google.android.material.button.MaterialButton    style="@style/Widget.AppCompat.Button.Colored"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="MATERIAL BUTTON"    android:textSize="15sp"    app:strokeColor="@color/green"    app:strokeWidth="2dp" />

• Unfilled Bordered Button:

<com.google.android.material.button.MaterialButton    style="@style/Widget.AppCompat.Button.Borderless"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="UNFILLED MATERIAL BUTTON"    android:textColor="@color/green"    android:textSize="15sp"    app:backgroundTint="@android:color/transparent"    app:cornerRadius="8dp"    app:rippleColor="#33AAAAAA"    app:strokeColor="@color/green"    app:strokeWidth="2dp" />

2. When you use appcompat:

build.gradle

dependencies {    implementation 'com.android.support:design:28.0.0'}

style.xml

Ensure your application theme inherits from Theme.MaterialComponents instead of Theme.AppCompat.

<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar">    <!-- Customize your theme here. --></style>

• Bordered Button:

<android.support.design.button.MaterialButton    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="MATERIAL BUTTON"    android:textSize="15sp"    app:strokeColor="@color/green"    app:strokeWidth="2dp" />

• Unfilled Bordered Button:

<android.support.design.button.MaterialButton    style="@style/Widget.AppCompat.Button.Borderless"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="UNFILLED MATERIAL BUTTON"    android:textColor="@color/green"    android:textSize="15sp"    app:backgroundTint="@android:color/transparent"    app:cornerRadius="8dp"    app:rippleColor="#33AAAAAA"    app:strokeColor="@color/green"    app:strokeWidth="2dp" />

Visual Result

Create a button_border.xml file in your drawable folder.

res/drawable/button_border.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="rectangle" >    <solid android:color="#FFDA8200" />    <stroke        android:width="3dp"        android:color="#FFFF4917" /></shape>

And add button to your XML activity layout and set background android:background="@drawable/button_border".

<Button    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:background="@drawable/button_border"    android:text="Button Border" />