how to make a capsule shape Button in android?

finally I found the way to do it with xml file. here is the code of the xml file that gave me the capsule shape button.

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle" >

  <corners
    android:bottomLeftRadius="30dp"
    android:bottomRightRadius="30dp"
    android:radius="60dp"
    android:topLeftRadius="30dp"
    android:topRightRadius="30dp" />

  <solid android:color="#CFCFCF" />

  <padding
    android:bottom="0dp"
    android:left="0dp"
    android:right="0dp"
    android:top="0dp" />

  <size
    android:height="60dp"
    android:width="270dp" />

</shape>    

Just use a MaterialButton using the cornerRadius attribute and your favorite width.

 <com.google.android.material.button.MaterialButton
            android:layout_width="100dp"
            android:layout_height="wrap_content"
            app:cornerRadius="18dp"
            android:text="BUTTON"
            />

You can also use the shapeAppearanceOverlay attribute:

<com.google.android.material.button.MaterialButton
        app:shapeAppearanceOverlay="@style/buttomShape"
        .../>

with:

  <style name="buttomShape">
    <item name="cornerFamily">rounded</item>
    <item name="cornerSize">50%</item>
  </style>

I haven't tried all of the answers here, but I believe some/all of them are works. The accepted answer is also works, but it can be simplified. Since I love elegant and simple solution, I come up with my own solution. Basically, we just need to add radius big enough compared with your View width and height, so it will create a round corner. In this case I put 1000dp to make it safe. We don't even need to add android:shape="rectangle" at all.

Just follow these 2 simple steps:

1. Create an XML file in your drawable folder. For example let's name it bg.xml

   <?xml version="1.0" encoding="utf-8"?>
   <shape xmlns:android="http://schemas.android.com/apk/res/android">
       <corners android:radius="1000dp"/>
   
       <solid android:color="@color/yourPreferredColor"/>
   </shape>
   

2. Then you can use it in layout XML file as your View property android:background="@drawable/bg" or directly in the code view.setBackgroundResource(R.drawable.bg)